C#

Great Reads

Maintain Scroll Position Problem fix for Chrome.

by Wonde Tadesse

The other option will be to use Update Panel ASP.NET control as much as possible. It helps to retain the current position on the page whenever a postback happens to the page.

Comparator - Data Sources Comparer

by Alex Pumpet

A simple program for comparing table data from two sources - SQL databases, Excel, CSV or XML-files

Introduction to D3DImage

by Dr. WPF

.NET 3.5 SP1 is here! It's time to break out your DirectX skills. This article provides the information necessary to get started using a new DirectX interop feature in WPF called D3DImage.

ASP.NET: Understanding OWIN, Katana, and the Middleware Pipeline

by John Atten

OWIN, Katana and Middleware Pipeline in ASP.NET

Latest Articles

Decouple ASP.NET Core Identity, Authentication and Database Engines

by Zijian

Reusable codes for JWT security in business applications

Simplifying Dynamic SQL Queries with Dapper

by Mishael Ogo

A look at a simple SQL builder for Dapper

Visual FA Part 5: Real World Lexing Example w/ JSON

by honey the codewitch

Implementing a simple JSON parser with Visual FA

Functional Programming in C#

by Akram El Assas

Functional Programming in C# through Algebra, Numbers, Euclidean Plane and Fractals

All Articles

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C#

< and > converted to html code while saving into database

20 Jun 2014 by sucharita dutta

Hi,We have one .NET application deployed in IIS 7. In certain text boxes if we enter special charaters like or &, it is converted to html code as >

HTML

< and > converted to html code while saving into database

20 Jun 2014 by Jafarinejadvazifehkhorani

As Ranjeet said it has happened somewhere in your code , but by using the HttpUtility you can decode it. here is an example :HttpUtility.HtmlEncode(" &"); //result & HttpUtility.HtmlDecode(" &"); //result &

HTML

<wpf question> how to remove the button glow effect and border

7 Sep 2014 by Member 10973822

Hello everyone, can someone help me with wpf buttonI want to remove the border and button glow effect.my button has an image background, it changes when the mouse hover but the button glows.here is the button code, I'm using visual studio 2010

WPF

VS2010

XAML

<wpf question> how to remove the button glow effect and border

7 Sep 2014 by Jawad Shairf

you can simply override the default border brush to your own border brush

WPF

VS2010

XAML

<Li> item retrieve from database

29 Aug 2016 by KyLim0211

public void binddata() { DataTable dt = new DataTable(); SqlCommand com = new SqlCommand("E_R_GET101", con); com.Parameters.AddWithValue("@Subs_cd", loggeduser.SUBSIDIARY_CD); com.Parameters.AddWithValue("@EMPLOYEE", loggeduser.EmployeeNo); ...

ASP.NET

<Li> item retrieve from database

29 Aug 2016 by AdvancedDNA

Instead of trying to BIND to a dataTable, try a DataSet. It's difficult without seeing the rest of your code, but try this:public void binddata() { DataSet ds = new DataSet(); SqlCommand com = new SqlCommand("E_R_GET101", con); ...

ASP.NET

!ispostback is not work well its work every time when page is load

3 Oct 2012 by Dev Ashish Jangid

protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { int i=0; //some code related to i// } } protected void _lblnext_Click(object sender, EventArgs e) { i+=1; //code related to i// }I always...

ASP.NET

!ispostback is not work well its work every time when page is load

3 Oct 2012 by solanki.net

Tell me how can u access local variable i in _lblnext_Click()? Explain what u want ?

ASP.NET

!ispostback is not work well its work every time when page is load

3 Oct 2012 by Mohd. Mukhtar

Hi Ashish,Please understand the concept of static variable. By default its value set to 0(zero), and its value retain in between function switch call. But here in your case you have declared static variable into the class and assigning the value in page_load event, you want to access...

ASP.NET

!IsPostBack treeview

8 Dec 2010 by karthikkushala

hi am using treeview on load even am binding treeview in that protected void HeadCreationTV_Load(object sender, EventArgs e){ if (!IsPostBack) { GetTreeViewBind(); }}but after saving some values in save button click i have to reload tree once...

ASP.NET

!IsPostBack treeview

8 Dec 2010 by Not Active

If you need to reload the tree after the button click then call GetTreViewBind in the button click handler.You may also want to familiarize yourself with this ASP.NET Page Life Cycle Overview[^]

ASP.NET

" Data Type Mismatch In Criteria Expression " Please I Need Help / Where Is My Mistake !!

13 Jun 2014 by Member 10855887

private void btn_addtostore_Click(object sender, EventArgs e) { string connStr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\StoreProdcut.mdb"; string sqlStr = null; OleDbConnection conn = null; OleDbCommand cmd =...

" Data Type Mismatch In Criteria Expression " Please I Need Help / Where Is My Mistake !!

14 Jun 2014 by Debabrata_Das

Hello friend, it seems like you are getting datatype mismatch error as you're trying to concatenate string with an integer value. Try to convert the integer value to string as shown below:for (i = 0; i

" Failed to generate a user instance of SQL server due to failure in copying database files.the connection will be closed" how to solve this error?

1 Dec 2017 by Member 13275563

I have develpoed application in winforms ,but when i open n client machine there are error occured.. " failed to generate a user instance of sql server due to failure in copying database files.the connection will be closed" please give me solution for this .My connection string and code in...

ASP.NET

" Failed to generate a user instance of SQL server due to failure in copying database files.the connection will be closed" how to solve this error?

1 Dec 2017 by OriginalGriff

As I said when you posted this earlier: Quote: That string doesn't look right: "Data Source=myPC" is unlikely - you'd normally have an SQL instance name on that as well. "Provider=..." is not a keyword SQL Server supports. Have a look here: Simple SQL Connection String Creation[^] It should...

ASP.NET

" Incorrect syntax near ')' " i need help please, what is the wrong with this code

4 Sep 2013 by Karim2Ahmed

private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { string cs = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\SATDB.mdf;Integrated Security=True;User Instance=True"; using (SqlConnection con = new...

SQL-Server

" Incorrect syntax near ')' " i need help please, what is the wrong with this code

4 Sep 2013 by Mike Meinz

Your error is in this statement:string sql = "GET_FILESTREAM_TRANSACTION_CONTEXT(), SELECT Trial_Addmission.PathName() from Sat";The Microsoft documentation for GET_FILESTREAM_TRANSACTION_CONTEXT[^] shows that it must be used in a Select statement.I've never seen anyone use...

SQL-Server

" Object reference not set to an instance of an object "...what condition should be here..... this condition is failed.....Sir, How to store Dummy image in view state when i left empty of...

16 May 2013 by Faizymca

protected void btnUpload_Click(object sender, EventArgs e) { if (imgUpload.HasFile) { //Check File is available in Fileupload control and then upload to server path fname = imgUpload.FileName; //spath = @"~\ImgUpload\" +...

ASP.NET

" Object reference not set to an instance of an object "...what condition should be here..... this condition is failed.....Sir, How to store Dummy image in view state when i left empty of...

16 May 2013 by Sergey Alexandrovich Kryukov

You did not show where the exception with the message "Object reference not set to an instance of an object" is thrown. Not to worry. This is one of the very easiest cases to detect and fix. It simply means that some member/variable of some reference type is dereferenced by using and of its...

ASP.NET

"<Name xmlns=''> was not expected. Error getting during deserialize SOAP response in C#?

6 Apr 2016 by SURAJ-CDAC

Below is my stub classes generated by wsdl.exe[System.Xml.Serialization.XmlArrayAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)][System.Xml.Serialization.XmlArrayItemAttribute("entries", Form=System.Xml.Schema.XmlSchemaForm.Unqualified, IsNullable=false)]public partial...

"<Name xmlns=''> was not expected. Error getting during deserialize SOAP response in C#?

6 Apr 2016 by Sergey Alexandrovich Kryukov

Well, XmlSerializer is itself pretty bad and outdated, not fun to deal with (compared, say, to data contract based serialization). But with SOAP you have no choice but playing by SOAP rules, even though they are quite bad. And I don't see where you do it. In particular, I cannot see where you...

" WPF DataGrid Practical Examples " is giving error

10 Dec 2013 by Member 8920414

Here is the link to this articles WPF DataGrid Practical Examples Ran the code with Visual Studio 2012 after installing the WPF Toolkit from add refrences. It compiles, and appears to run, but the buttons do not all work correctly. That buttons that crashes the program are listed...

WPF

DataGrid

MVVM

"(Classname) does not exist in the current context" even if the class actually exists

5 Jun 2023 by Le lance Flamer

Hello, Microsoft Visual Studio 2022 problem: I made a simple program that converts text to an URI and after it gets generated, the program will ask the user if they want to copy the URI to use it somewhere else. I need to use the...

Visual-Studio

"(Classname) does not exist in the current context" even if the class actually exists

4 Jun 2023 by OriginalGriff

Put the text cursor in the word "Clipboard" and hover the mouse over it - a symbol will appear at the beginning of the line. Click it with the mouse and it'll make suggestions as to what you need to do, which is almost certainly to add a using...

Visual-Studio

"(Classname) does not exist in the current context" even if the class actually exists

5 Jun 2023 by Alan N

I had something similar recently with VS2017. I can't remember what I did to fix it but most likely I would have done a super clean on the project. I do recall that there was nothing wrong with the source code. Super Clean 1) Delete obj...

Visual-Studio

"(Classname) does not exist in the current context" even if the class actually exists

5 Jun 2023 by Le lance Flamer

Well, I fixed it myself. The file of the class was the problem: Now I can access all everything as they should. But I still don't understand why it didn't want to work at the first place. Here's the solution: Delete the file then recreate it. It...

Visual-Studio

"+" sign getting replaced with space in querystring

18 Jul 2016 by sopi9

I am getting a hit from URL which contain Encoded data. I have came across a situation where this data had + sign which is getting replaced with space and I don't want it to happen.Sample URL: http://xyz.test.com//samplepage.aspx?msg=AUdAR0JGRERBWCMZIxYmJR8fTRY+JR5DRRkxQiA4RUQ=Above URL...

"+" sign getting replaced with space in querystring

17 Jul 2016 by Kornfeld Eliyahu Peter

By design (and originally) in url space should be encoded to + and not to %20...So the solution is - encode the url by yourself, just as you have done...It will be clear to browser and will not change the data...An other - probably less preferable - option is to base64 encode your data...

"+" sign getting replaced with space in querystring

17 Jul 2016 by F-ES Sitecore

You need to encode the msg value when you generate\redirect to the url.string url = string.Format("samplepage.aspx?msg={0}", System.Web.HttpUtility.UrlEncode("AUdAR0JGRERBWCMZIxYmJR8fTRY+JR5DRRkxQiA4RUQ="));

"/" problem in export to excel from gridview

7 Dec 2014 by Member 11293760

Hi All,I am facing a problem in Export to Excel from a gridview data.I have the data with forward slash in the data ("/") in one of the columns which is diplaying like a character ”⁄” (slant is more in this case) instead of “/”. The same file is uploading in some other application and...

ASP.NET

"/" problem in export to excel from gridview

7 Dec 2014 by Azziet

Export Data with Encoding itResponse.ContentEncoding = Encoding.Unicode;Response.BinaryWrite(Encoding.Unicode.GetPreamble());refer this linkhttp://asheej.blogspot.in/2012/03/how-to-export-gridview-data-to-excel.html[^]

ASP.NET

"A dependent property in a ReferentialConstraint is mapped to a storage-generated column. Column: 'employee_id'."}

22 Mar 2013 by Kurac1

"A dependent property in a ReferentialConstraint is mapped to a storage-generated column. Column: 'employee_id'."}var emp_assigment = new EMPLOYEES_ASSIGNMENT { from_date =...

"A dependent property in a ReferentialConstraint is mapped to a storage-generated column. Column: 'employee_id'."}

22 Mar 2013 by Dave Kreskowiak

The code you posted has nothing to do with the problem. It's probably due to you screwing up the relationship between two tables, invloving the employee_id column of one of the tables.Did you accidentally tell EF that an autonumber column in the database is a Foreign Key column??

"A first chance exception of type 'System.IO.IOException' occurred in mscorlib.dll "

1 Jun 2013 by freeheartxiii

Hi, there!I am the new guy on WCF. These days, I'am learning that.I made a empty solution, and this solution contains 4 projects: two c# libs, and two consoles as host and client. the programs ran well, but when client started after host, it raise this info in debug output window: "A first...

VS2012

WCF

"A first chance exception of type 'System.IO.IOException' occurred in mscorlib.dll "

2 Jun 2013 by PrissySC

Actually, I will almost bet that while this is the exception that was caught that it is not the problem. You could catch and handle this and ignore it, but you need to find the underlying cause. Check your output, and do a try catch on the block that you suspect. Print out the exception in a...

VS2012

WCF

"A generic error occurred in GDI+ " Error for save the Image after editing

2 Oct 2014 by Member 9492907

In my application ,i want to Add some dynamic text to my the Current image. So each time When i open the Form the image need to edit and display. First time when i open the Form ,all will work properly.But when i open it for 2 nd time,it won't. I checked all the privileges for the folder...

"A generic error occurred in GDI+"

16 Mar 2014 by Sicppy

I get "A generic error occurred in GDI+" when I try to save a bitmap(that I have opened and edited). It only happens some of the time. I have no idea why this is happening, please help. It occurs at line 162.Thanks in advance,Jordanusing System;using...

.NET

Bitmap

graphics

"A generic error occurred in GDI+"

16 Mar 2014 by Abhinav S

Check the folder permissions where you are saving the file.You should have permissions to save the file.In addition, ensure that the file does not already exist and is open in another program.

.NET

Bitmap

graphics

"A generic error occurred in GDI+" ,How do I solve this?

22 Nov 2014 by Krishna7

"A generic error occurred in GDI+" error is occurring in my WPF Editor Application while typing Specific Hindi letters, am using DevExpress RichEditControl for editor (ISM-V6 is using for Hindi Text).How do I solve this?

"A StartDocPrinter call was not issued " error on crystal report viewer print

29 May 2013 by Vahidrsj

I'm using VS2012 and Crystal reports 13.0.5. When i want to print displayed report with print button on crystal report viewer toolbar, its giving me this error: "A StartDocPrinter call was not issued."This article cant help me: http://support.microsoft.com/kb/121074[^] because my printer...

"A StartDocPrinter call was not issued " error on crystal report viewer print

19 Oct 2013 by thatraja

Here solved threadhttp://scn.sap.com/thread/3299135[^]

"A" does not contain a definiton for "b" and no extension method "C"

23 Apr 2016 by m.justice10

Alright I have no idea what is going on here, I can't seem to see why this will not work. { const int CONST_array_max_size = 5; int field_current_student_array_index = 0; decimal[] myArray_StudentGradeDec = new decimal[5]; string[]...

"A" does not contain a definiton for "b" and no extension method "C"

23 Apr 2016 by OriginalGriff

Start by looking at exactly what you are doing here:{ const int CONST_array_max_size = 5; int field_current_student_array_index = 0;... if (this.textBox_StudentName.Text == "") { MessageBox.Show("Error 101: Invalid Student Name"); } else { ...

"About c#.net project deployment"

18 Sep 2011 by ravibulls007

I want to deployment my c#.net project .i want set up that will be created after deployment will installmssql 2005,.net freamwork ,and the server name should be automatically willbe changed on my connection string in my project..So Please Help Me The Step To Do such type of...

"About c#.net project deployment"

18 Sep 2011 by OriginalGriff

You should not include SQL Server in your installation. There are a couple of reasons:0) You can only distribute SQL Server Express for copyright reasons - not SQL Server full version.1) They may already have SQL Server installed on the network. If so, then they will presumably want to use...

"Add as link" an entire folder structure

8 Mar 2010 by Khaniya

I know how to add files to a project by dragging into solution explorer, and I know how to Add Existing Items.But how does one add a folder + subfolders + files all as links?

"Add as link" an entire folder structure

9 Mar 2010 by DX Roster

right click to website name and in solution explorer then there is an option add new folder...for add subfolder right click to subfolder and click to add new folder..for add new page or links right click to folder and click on add new item..thanks

"Add as link" an entire folder structure

9 Mar 2010 by Xmen Real

http://support.microsoft.com/kb/306234[^]

"Add as link" an entire folder structure

9 Mar 2010 by Khaniya

Again given link by XMen shows for adding link for file, not for folderNow I guess still it is not possible with VS 2008Many Thanks :)

"Add to Calender": Adding event to Microsoft Outlook through Web Application

18 May 2012 by deeptibansal

Adding event to Microsoft Outlook through Web Application

ASP.NET

"Add to cart" should increment count if the cart already has item in it

25 Apr 2012 by Pete O'Hanlon

When you initialise your cart instance, the number of items in it will be 0. Now, when you add an item to it, just increment count. It's not that hard a task.

.NET

"An error occurred while querying for WMI data:accessed denied"

13 May 2012 by pavanantkul

hello sir i am getting a run time warning by showing "An error occurred while querying for WMI data:accessed denied"the project title :spyNetcoding lang:c#technologies used:WMI and MQLmy current version of OS is: windows7pls help me[edit]Suject changed, SHOUTING removed -...

"Arithmetic operation resulted in an overflow" when I try to add a view to my project in visual studio

23 Jan 2022 by Member 15435636

When I try to add a view, an error message pops up saying "Arithmetic operation resulted in an overflow" What I have tried: I've unsuccessfully tried rebooting my PC, restarting and updating Visual Studio Community 2022

Visual-Studio

MVC4

ASP.NET

"Arithmetic operation resulted in an overflow" when I try to add a view to my project in visual studio

23 Jan 2022 by Member 10163600

I have the same problem with VS2022 Community. Released version. It's an MVC4 project.

Visual-Studio

MVC4

ASP.NET

"Arithmetic operation resulted in an overflow" when I try to add a view to my project in visual studio

23 Jan 2022 by M Imran Ansari

Quote: This issue already reported for fixation. Kindly open your Visual Studio in Admin mode to avoid this exception. I would suggests open as Admin by default. To open you Visual Studio in Admin mode, open VS installed folder. Right click on...

Visual-Studio

MVC4

ASP.NET

"C# Hooks For RRDtool"

26 May 2010 by Mike Corley

C# (.NET and Mono) library provider for RRDtool

"Can you explain how the code works".. question can be closed

23 Jun 2015 by Shrijith Gopalakrishnan

Console.WriteLine("{0,2} + {1,2} = {2,2}\t{3,2} * {4,2} = {5,4}", i, 100 - i, i + (100 - i), i, 100 - i, i * (100 - i));

"Can you explain how the code works".. question can be closed

23 Jun 2015 by Shrijith Gopalakrishnan

I was wondering what {0,2} meant. Now I realize that the '2' is included just to specify spacing.Console.WriteLine("{0} + {1} = {2}\t{3} * {4} = {5}", i, 100 - i, i + (100 - i), i, 100 - i, i * (100 - i));This code would...

"Can you explain how the code works".. question can be closed

23 Jun 2015 by OriginalGriff

It's a simple output-to-the-console instruction. It outputs 5 values in the form:nn + nn = nn nn * nn = nnThe first parameter (the string) specifies the way the data will be presented, the remaining ones provide the values to show.Each item in curly brackets in the format string...

"Cannot access a disposed object"

21 Mar 2013 by Jagadisha_Ingenious

Hi everyone, Can anybody tell me why i get "Cannot access a disposed object" error when i am migrating from 1 form to another without closing the previous form. To be precise i am using windows form as modal forms, and i have started the timer when i am in the 1st form & when i...

"Cannot access a disposed object"

21 Mar 2013 by toATwork

From the comments it is clear that the Form is Disposed.Add a breakpoint to theprotected override void Dispose(bool disposing) method of your form and check the call stack who caused the disposal of the Form.

"Cannot implicitly convert type 'int' to 'int[]'"

10 Mar 2020 by User 14735579

I am trying to implement heap sort into my code, it should take numbers from the .txt file and sort them using heap sort however, I am getting the error, "Cannot implicitly convert type 'int' to 'int[]'" this is showing up on the line int[] arr...

"Cannot implicitly convert type 'int' to 'int[]'"

10 Mar 2020 by Richard Deeming

You're trying to assign a single int variable (value) to an array (arr), which obviously won't work. You're also trying to sort and output the array on each iteration of the first foreach loop, which is almost certainly not what you want. Move...

"Cannot implicitly convert type 'int' to 'int[]'"

10 Mar 2020 by Richard MacCutchan

int[] arr = value; The variable value is a single integer, so you cannot store it into an array. You can store it into a single element of an array thus: arr[0] = value; But first you need to create your array given its size: int[] arr =...

"Cannot implicitly convert type 'void' to 'system.collections.generic.list<helptoearn.models.allpayouts>" while updating list

15 May 2020 by Member 13160027

I have to update list values with new values daily. the new value is listvalue+newvalue What I have tried: allPayouts = (from p in allPayouts where p.UserID == Paid.UserID select p).ToList().ForEach((p) => { ...

MVC4

"Cannot implicitly convert type 'void' to 'system.collections.generic.list<helptoearn.models.allpayouts>" while updating list

14 May 2020 by OriginalGriff

Compiling does not mean your code is right! :laugh: Think of the development process as writing an email: compiling successfully means that you wrote the email in the right language - English, rather than German for example - not that the email...

MVC4

"Cannot implicitly convert type 'void' to 'system.collections.generic.list<helptoearn.models.allpayouts>" while updating list

15 May 2020 by Richard Deeming

.ToList returns a List[^]. The list's ForEach method[^] executes a specified action for each item in the list. It does not return anything. Therefore, you cannot assign the return value (which doesn't exist) of that method to your variable. ...

MVC4

"Cannot open Service Control Manager on computer machine name. This operation might require other privileges"

29 Mar 2017 by vrushali katkade

i am trying to find running services in my network systems. i am able to get some but for some systems i am getting error"Cannot open Service Control Manager on computer machine name. This operation might require other privileges"ServiceController sc = new...

.NET

"Cannot open Service Control Manager on computer machine name. This operation might require other privileges"

4 Jul 2011 by Christian Graus

Well, what does the error say ? Your code obviously works, but on some machines, the user does not have the right privileges. Like the message says.

.NET

"CausesValidation=False" not working for dynamically created button

5 Nov 2012 by Narra sreenu

Hi all, In my page have some required field validation controls. these required validations should fire only some button click events. For firing required field validators only in some required button click events, set CausesValidation='True' and for remaining buttons set...

ASP.NET

"CausesValidation=False" not working for dynamically created button

5 Nov 2012 by PramodSawant

Try By Setting buttons property "UseSubmitBehaviour=False"BtnDisplay.UseSubmitBehaviour=False

ASP.NET

"Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))" in 64 bit OS

16 Aug 2011 by nidheeshkayal

Hi Friends,We developed one windows application using VS 2005 with framework 2.0. This application is running perfectly on 32 bit Operating System. Now we need to give support for 64 bit OS. While working with 64 bit Operating System we are getting the below error...

"Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))" in 64 bit OS

16 Aug 2011 by Espen Harlinn

You are trying to embed a 32-bit ocx in a 64-bit application.Your application will probably run just fine if you force to run as a 32-bit application on a 64-bit OS ... project properties -> build -> Platform Target = x86Best regardsEspen Harlinn

"Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))" in 64 bit OS

21 Apr 2013 by S.M. Arafat

You can find the solution here:http://support.esri.com/en/knowledgebase/techarticles/detail/33000

"Collection was modified; enumeration operation may not execute "

9 Aug 2012 by Kamalkant(kk)

"Collection was modified; enumeration operation may not execute " Why this error is coming when execute my below code:This is my Window Form Application in .Net1.I am using a Global class for reading instance message and shown it to a Textbox2.It is executing fine but some time showing...

C#3.0

"Collection was modified; enumeration operation may not execute "

9 Aug 2012 by Richard MacCutchan

Your question is a bit of a mess so it is difficult to be certain what is happening and when, but I suspect you are adding or removing an item from your list within the foreach loop. That is what the error message is telling you.

C#3.0

"Column 'abc' does not belong to a table.

17 Jun 2018 by User 12225285

My combo box does not load and keeps showing this error Column 'Item_GenName' does not belong to a table. Here's the code: void loadgeneric() { string constring = "Data Source=D-HOS-MIS2;Initial Catalog=Consignment_db;Persist Security Info=True;User...

SQL

VS2017

"Column 'abc' does not belong to a table.

17 Jun 2018 by Maciej Los

Take a look at this line: string query = "select distinct convert(varchar,Item_GenName) from ItemMasterlistTable where datalength(Item_GenName) != 0"; This returns something like: (No column name). So, change it as follow: string query = "select distinct convert(varchar,Item_GenName) AS...

SQL

VS2017

"COM object that has been separated from its underlying RCW cannot be used" exception

2 Jan 2017 by ielsky

Hello Everybody.I have strange situation in my applicaion (MS Outlook Addin).I work with MailItem object in Item.Open event handler.I get Inspector object calling MailItem.GetInspector property.When I try to set handler for Inspector.Close event InvalidComObjectException with message...

"COM object that has been separated from its underlying RCW cannot be used" exception

1 Feb 2011 by Nish Nishant

One likely cause is that you are accessing a single threaded COM object from different threads. In your case, the event handler may not be running on the thread that created the COM object.

"COM object that has been separated from its underlying RCW cannot be used" exception

25 May 2016 by Sergey Aseev

You need have strong reference to event.Anything like thisMailItem mailItem;CloseEvent closeEvent;...InspectorEvents_10_Event inspectorEvents = mailItem.GetInspector;closeEvent = inspectorEvents.Close;closeEvent += delegate {.....};

"COM object that has been separated from its underlying RCW cannot be used" exception

2 Jan 2017 by Jason_Kiscy

hey,Hi, I am facing the same problem it is really difficult to debug it because the test case is not unique. did you find a solution? I really appreciate your help in advance.Here is my mailbox:1424870395@qq.com

"Conversion Failed When Converting Date And/Or Time From Character String" ? What Can I Do ?

12 Apr 2015 by Member 2140700

con = new SqlConnection(cs.DBConn);con.Open();cmd = new SqlCommand("SELECT RTRIM(invoiceNo) as [Order No],RTRIM(InvoiceDate) as [Order Date],RTRIM(Invoice_Info.CustomerID) as [Customer ID],RTRIM(CustomerName) as [Customer Name],RTRIM(SubTotal) as [SubTotal],RTRIM(VATPer) as [Vat+ST...

"Conversion Failed When Converting Date And/Or Time From Character String" ? What Can I Do ?

12 Apr 2015 by Richard MacCutchan

cmd.Parameters.Add("@d1", SqlDbType.DateTime, 30, "InvoiceDate").Value = dtpInvoiceDateFrom.Value.Date.ToShortDateString();Why are you converting the date to a string?

"Conversion Failed When Converting Date And/Or Time From Character String" ? What Can I Do ?

12 Apr 2015 by Member 2140700

the field type in database is nchar(30)...so i am converting it before any process

"Could not allocate 8192 bytes". What is this error and why does it occur?

11 May 2013 by Amogh Natu

Hi, I'm trying out a sample problem on strings wherein I take a string as input and find out the similarity of each of its suffix with itself. For two strings A and B, the similarity of the strings is the length of the longest prefix common to both strings. For example, the similarity of...

.NET

string

"Could not allocate 8192 bytes". What is this error and why does it occur?

11 May 2013 by OriginalGriff

When I run your code with 99,999 byte strings (I cheated and read it from a file) I get "out of system memory" on the first run through GetSuffixes, so start by looking at that - and what do we find?Input string length: 99,999 bytes. "i" is 8,847, so it doesn't get near the end of the...

.NET

string

"Could not allocate 8192 bytes". What is this error and why does it occur?

11 May 2013 by debkumar@codeproject

Instead of storing all sub-strings (suffixes) in list object, calculate the sum of similarities for each suffix. I could not figure out your purpose of calculating the sum of similarity. You can look into KMP failure function if that helps.

.NET

string

"Could Not Import all messages" FxCop warning message ?

16 Apr 2011 by RamyaShivraj

Hello,How do I overcome the "Could not import all the messages" from FxCop tool?I have added few a targets to the FxCop project (Fxcop 1.36 and WPF project) and analyzed.Then a few warning messages have been excluded and saved the fxcop project.Now every time the fxcop project is...

C#4.0

"Could Not Import all messages" FxCop warning message ?

16 Apr 2011 by Anil_Saran

Hi,Kindly follow the below link,As it seems to adjust some project property setting.http://msdn.microsoft.com/en-us/library/bb429341(VS.80).aspx[^]However even after this problem still persist then you can send me the sample on saran.anil@hotmail.com :)Regards,Anil Saran

C#4.0

"Could Not Import all messages" FxCop warning message ?

16 Apr 2011 by #realJSOP

FX-Cop merely provides guidelines. If your code compiles and runs, you don't really have to do anything except fix bugs.

C#4.0

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

6 Jan 2014 by JayantaChatterjee

Hi all,I create a form which have some function perform on the form_load, at the meantime I want to show a form(like "please wait").I used Background Worker. My code is :-private void QuestionForm_Load(object sender, EventArgs e) { WP = new WorkerProgress();//here...

WinForms

BackgroundWorker

threads

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

7 Jan 2014 by OriginalGriff

You cannot access controls exactly from the thread that they were created on: the UI thread.You are trying to access them from your BackgroundWorker, which is a different thread entirely.Either use the Invoke method to access them, or move the code into the UI thread via the...

WinForms

BackgroundWorker

threads

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

7 Jan 2014 by Rahul VB

Hello Mam, When ever we start a form based application, the application starts on a single UI thread. Now if i perform some operation using some of its controls. Suppose, on button click, perform some calculation. If the calculation is small its okay, but as the work to be done grows,...

WinForms

BackgroundWorker

threads

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

10 Jan 2014 by Rahul VB

Hello Mam, look at the code below: class Class1 { static TableLayoutPanel tlp; public Class1(TableLayoutPanel TLP) { tlp = TLP; } public void doWork(object sender,DoWorkEventArgs e) { ////perform...

WinForms

BackgroundWorker

threads

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

11 Jan 2014 by Alan N

Hi Jayanta,I was reading the discussion you were having with OriginalGriff and I wonder if the real problem is the poor performance of Microsoft's TableLayoutPanel. If you are having issues with redraw then enabling double buffering on the control will speed it up. I have found that on .NET...

WinForms

BackgroundWorker

threads

"crystal report application name here" has encountered a problem and has closed

23 Aug 2014 by junaid2

i have created an application in which i have designed a crystal report and the application has single winform in which there is a crystal report viewer. everything is fine and working but when i try to run that same application on other PC an error occurs saying "crystal report application name...

"crystal report application name here" has encountered a problem and has closed

23 Aug 2014 by OriginalGriff

This isn't a problem we can solve, or even help with that much: we don't have access to your code or to the "other PC".The chances are that when you try to run the app on a different PC, one or more of the assemblies, resources or frameworks that your app requires is not installed, and so it...

"Dim a=b". What type of declaration is this? How can it be used in c#?

19 Dec 2011 by maajanes

"Dim a=b". What type of declaration is this? How can it be used in c#?

19 Dec 2011 by OriginalGriff

It can't be used in c#, it is a VB code line.What it does is declare a new variable a and assign it the value of b. Since VB is not type safe, it doesn't car what type a or b are.C# is type safe. The closest you can get to this are:dynamic a = b;or var a=b;But it is much, much better to...