Click here to Skip to main content

Submit your article

WebForms

WebForms

Great Reads

SignalR Chat App With ASP.NET WebForm And BootStrap - Part Three

by Altaf Ansari

SignalR Real-Time ChatApp with Emoji / Smiley and sending file attachment

SignalR Chat App with ASP.NET WebForm And BootStrap - Part One

by Altaf Ansari

Integration of SignalR with ASP.NET C# WebForm Application in Real-Time Chat Application

Introducing PdfRport

by Vahid_N

PdfReport is a code-first reporting engine which is built on top of the iTextSharp and EPPlus libraries.

Add Images and Textboxes to PDF

by pmpdesign

A lightweight C# library to add images and 'round rectangles' to a PDF on the fly and then securely embed the PDF in a web page

Latest Articles

Convert HTML to PDF by Using Microsoft Edge in ASP.NET WebForms

by adriancs

Generate PDF from HTML with MS Edge

Automatic Route All Pages in ASP.NET WebForms (AutoRoute)

by adriancs

Easily route all pages at once in single line.

Gradient Color Picker - Revised Again

by gggustafson

This article revises an earlier revision of the Gradient Color Picker (V2). The incentive for the revision was a reader request for a larger number of initial color choices.

Gradient Color Picker V2

by gggustafson

Revises an earlier implementation of the Gradient Color Picker

All Articles

WebForms

Tata photon connectivity

31 Jul 2010 by #realJSOP

Anyone on this site that COULD answer it would probably have to google it to find you an answer, so you may as well google it yourself and save everybody valuable time.

Object reference not set to an instanc of an object

4 Mar 2011 by #realJSOP

Either the Request object is null, or XResult is null, meaning the querystring element "res" does not exist in the querystring.

Manipulating Keyboard Input

23 Mar 2011 by #realJSOP

Handle the TextChanged event for the TextBox.

make a textbox visible after clicking checkbox

30 Jun 2011 by #realJSOP

textbox.Visibl...

How to not mix cookies of ASP.NET websites deployed on intranet

10 Apr 2019 by #realJSOP

Maybe you could use a GUID in each app to uniquely identify the app-specific cookie instead of the userID.

Partial view using ASP.NET webform.

13 Dec 2019 by #realJSOP

Implement "user controls": How to: Create an ASP.NET User Control | Microsoft Docs[^]

Asp.net webforms parameter tampering

21 Nov 2021 by #realJSOP

There's nothing you can do about the act of query string modification. However, just because it can be done, doesn't mean you can't take steps to protect yourself. Take a look at this: HttpModule to encrypt query strings[^]

ADFS implementation with ASP.NET

13 Feb 2023 by $ultaNn

Dear i ave followed steps given in this Link when I debug the application, I am getting Error This site can’t be reached What I have tried:

active-directory

How to Utilize Session Variables

31 Jan 2009 by -- Abhi --

An article on how to utilize session variables

A ToolPartHelper to use with ReturnOfTheSmartPart

23 Oct 2007 by .chris

The code helps speed up the devopment of toolparts using SmartPart and SharePoint.

Redirect to another page if code is being uploading on the server

19 Jul 2021 by .NET- India

Front-side(Angular) code gets nothing when the code is being uploading on the the server from backend-side(.NET Core Web Api), except a message "Loading data....". But i want to redirect to another page showing a message "Page is under maintance"...

On click any of the column in datagrid to make that fullrow selected

26 Apr 2007 by .NetRams

ASP.Net datagrid onclick change selected row back color.

How to edit a section of my .aspx page dynamically from a textbox

29 Jan 2015 by /\jmot

Use a TextEditor control to edit the content of the page as Html, then Save it to a page and replace it to the .aspx page using the literal control. ltHTMLBody.Text = "Your html content after edit"; ...

How can I draw a picture

27 Mar 2011 by 111tania

How can I draw a picture? I can't find anything?Where can I start?Thanks in advance!

How to list data retrieved from a table in aspx page web form

21 Aug 2017 by 1Future

>I'm sort of new to web forms but i hope anyone of you would be able to advise me on how to tackle this: I have the following table in the database: ID | Name | ParentId 1 | music | 0 2 | house | 1 3 | urban | 1 4 | games | 0 5 | ps4 | 4 2 | Xbox |...

How do I pass variables/properties from one method to another in C# aspnet web forms

21 Aug 2017 by 1Future

Hi All, I have the following methods in my Aspx page . //method 1 protected void UserId(object sender, EventArgs e) { //getting user id from a button click as a parameter int UserId = 231; } //method 2 protected void GetUserId(object sender,...

Is it possible to call a server side method in a client side comparevalidator in ASP.

7 Sep 2017 by 1Future

Hi All, I have the following validator in my project which validates the dates entered in two fields like so:

How do I get the value of selected item in listbox in ASP.NET webforms

19 Nov 2017 by 1Future

Hi , I have a Listbox in my project like this: The Selected Value is: Code...

How to get values from a selected item in listbox in ASP.NET web forms with javascript/jquery

21 Nov 2017 by 1Future

Hi All, New to client end programming and i was hoping someone could help on how i would go about in achieving this. I have the following below in my project Markup code

How to triggger server side code from javascript/jquery in ASP.NET webforms

21 Nov 2017 by 1Future

Hi, I have a listbox in my project that listing some values which i'm pulling from the database. The values have parent I'ds associated with them and are listed in listbox like below: UK(parent) London(child) Manchester(Child) USA(parent) New York(child) Florida(child) What I would like to do...

Sorting in WPF-MVVM

1 Jul 2015 by 1sumitanand

Sorting of simple ListView Elements in Ascending/Descending Order

How to Add multiple files folder in Solution explorer Visual Studio 2010

19 Oct 2011 by 2011999

Dear All Experts,One folder in more than one file upgradeReport_File, app_code,App_data, Backup, bin,Css, Images, js, show, upload, userControl, utils,DisplayRecord.aspx, DisplayRecord.aspx.csHandler.ashx, PhotoDetails.aspx, Sample(3).sln, sample3, suo, showFullSizeImg.ashx,...

web_development

Master page link button not working properly

26 Jan 2017 by 204.sharma

Hi, My problem is, I have a link button(lnk_logout) on master page.In content page i have another link button (LinkButton1) in gridview template field. Now I want to open a new window on linkbutton1 click. I am using Javascript and its working fine. But after that when i click on...

After installing microsoft.aspnet.friendlyurls to hide .aspx from URL, the website is showing 500 internal server error only on mobile devices, but it works fine on the desktop.

23 Dec 2023 by 2techbrothers development

After installing Microsoft.AspNet.FriendlyUrls to hide .aspx from URL, The website is showing 500 internal server error only on mobile devices, but it works fine on the desktop. Code in RouteConfig.cs using System; using...

how to set up a own MVC structure for asp.net

17 Nov 2010 by @nuraGGupta@

This is the best example IMO you can get anywhere to learn MVC from start to endhttp://nerddinnerbook.s3.amazonaws.com/Part1.htm[^]You can also change part1.htm to part2.htm, part3.htm etc in the url, manually to navigate to different parts, or otherwise links to next part are given at...

Restriction to a folder from being access

2 Aug 2012 by _Amy

Hi,Refer the links...

how to disable a page after submit button click and also process continue of that button

19 Oct 2012 by _Amy

Hi Mits,I think your question is very similar to Disabling an ASP.NET Button Control During Postback with an AJAX Loading Background Image[^].You need to add a function which will disable and enable all the controls(which you need) based on the parameter passed in it. Now call the function...

Fire Button Click Event when enter key is pressed Inside Textbox(in Web)

27 Feb 2013 by _Amy

Take all your page contains in a panel and set DefaultButton property to your submit button. --Amit

url routing like as subdomain in asp.Net web Forms c#

21 Apr 2013 by _Amy

You can do it using URL Routing. Refer the link below:Article : URL Routing[^]Web App 2 : URI routing[^]Hope it helps!--Amit

C# Web.config file giving unknown issues

24 Jun 2013 by _Asif_

Seems like this web.config is not XML compliant. Save this web.config as test.xml and load it in IE and check what is the error. Hopefully this should resolve your issue.Thanks

Get the date to a format DB will accept

27 Jan 2015 by _Asif_

Problem is your parameter mapping is incorrect. You have 23 fields but you are passing 24 fields in parameters. AC_PreferHotelURL fields is incorrectly mapped to @AC_PreferHotel and this has caused all further parameters to be in invalid order. Correct command would be like...

How can I search only checked items from database [ASP.NET]

19 Jan 2022 by _Asif_

Its not that difficult. Approach could be like * HashMap filterMaps = new HashMap() * for each column (Id, Age, sex, group, etc) filterMap["Id"] = 001 filterMap["Age"] = 12 * ArrayList list = new...

web_application

How Do I Access My Asp.Net Web Application As A Additional Directory On Existing Url

22 Apr 2014 by _Damian S_

Yes. Simply deploy your application into the directory you want and voila!! Of course, that directory should be set as a web application...

Having the CheckBoxList support many-to-many relationships

4 Jul 2007 by _JERKER_

Example of implementing many-to-many multiple choice functionality the declarative way.

SQL-server-2000

Prevent user from downloading report

8 May 2016 by _ProgProg_

Dear,I have a request from my Business owner to prevent user from downloading report.Now i am displaying my report in browser using the following code:private void DisplayReportInBrowser() { // Variables Warning[] warnings; string[]...

Frontend design for ASP.NET web applications

3 Sep 2014 by _yaRus_

Frontend design for ASP.NET web applications

Populate 2 textboxes based on text entered.

31 Aug 2011 by _Zorro_

I assume your question is a bit harder than just asking how to get a value from a textbox. If that's not the case, here's my answer based on what I understand (which I'm sure is wrong :P)...String value = thePopulatedTextBox.Text;It can't be that easy though...Do you really mean...

ASP.NET and Globalization

21 Jun 2011 by A Mahesh

ASP.NET and Globalization

Ajax modal popup showing automatically

2 Feb 2017 by A.R Farooqui

Related with ASP.Net Web form.I have a text box and i am performing some task on text change event.The problem here is that when text change event occur Ajax Modal Popup showing automatically. Note : Page contains an update panel.What I have tried:I tried much but unable to...

Model list is not returning to the Controller from view

30 Dec 2013 by Aaditya parcha

Hi,i have a student class like belowpublic class Student { public int stdId { set; get; } public string stdName { get; set; } public string dept { get; set; } }and my controller code is public ActionResult Student() { ...

How to reference a linkbutton inside gridview

29 Apr 2020 by aalhussein

Hi, I am using Modal popup extender to show a panel once I click on Button1 control as seen below. The code works fine. However, instead of using Button1 control as a target (TargetControlID="Button1"), I want to use another control inside...

Unable to get response with WebRequest of method post

31 Mar 2013 by aamirsami

hey guys i am new to this asp.net stuff. I have a .aspx page which has a function something like this. this function is getting called from page_load event as shown below.//page load eventtry { Response.Write(SendMessages()); } catch(Exception...

web_development

Automatically Switch from HTTP to HTTPS

11 Oct 2006 by aanodide

Implements a scenario where you want to enforce page-specific HTTP/HTTPS rendering.

How to hide a column of a table of user control from aspx page using js/jq?

25 Sep 2020 by Aaron Bane

In the aspx page I am calling the the user control two times. On page load 1 usercontrol will be visible but the the other will be visible on button click and it should show only book description and book title. To achieve this I named the class...

split webform into 2 parts

24 Jul 2012 by Aarti Meswania

--------------...

Visual Studio Tips & Tricks for Developers:- This includes some shortcuts features in Visual Studio 2008 which will increase your productivity

13 Dec 2008 by Aashish Kumar Gupta

Visual Studio Tips & Tricks to increase development productivity

how to get list open windows forms name

15 Dec 2013 by abbaspirmoradi

try this:List elements= new List();foreach (Form item in Application.OpenForms) elements.Add(item.Name );

Covariance, Contravariance and Invariance in C# Language

23 Jul 2009 by abcdefghijklasdsad

Covariance, contravariance and invariance in C# language

Easy way to create secure ASP.NET login using Session

28 Nov 2007 by Abdallah Fayez

It an easy and secure way for begginer ASP.NET developer to create secure login WebForms using Sessions

Construct and Display Unlimeted Dynamic Menu (English & Arabic)

25 Sep 2005 by Abdelmoniem Hafez

the article provide an admin module to construct unlimeted menu in db and code to display this menu

Construct and display dynamic unlimited levels of menu

3 Oct 2005 by Abdelmoniem Hafez

This article provides developers and non-developers with a module that builds and displays dynamic unlimited levels of menu [English and Arabic].

Parent/Child (Hierarchical) Relational Treeview User Control Development in ASP.NET

14 Aug 2012 by Abdul Quader Mamun

Custom TreeView web user control for parent child relatioinal data upto infinity

Effective Paging with GridView Control in ASP.NET

16 Nov 2010 by Abdul Quader Mamun

Paging must be effective for large scaleable applications. Without smart and effective paging and sorting for huge amount of data, user request takes more time and uses more resources.

How to use StringBuilder in recursive procedure in VB.NET.

3 Jul 2012 by Abdul Quader Mamun

delete image from a folder(folder is in project)

14 Jul 2012 by Abdul Quader Mamun

Use this codeString patha= String.Format(@"{0}\{1}" ,Server.MapPath("images"),"2.jpg"); if (System.IO.File.Exists(patha)) { System.IO.File.Delete(patha); }Thanks,Mamun

Introduction to Web Parts

1 Mar 2007 by Abdul Sami, PMP

A brief introoduction to using WebParts in your applications

WCF Comparison with Web Services and .NET Remoting

9 Jan 2010 by Abdul Sami, PMP

This article is about the differences between WCF and Web Services and .NET Remoting.

What is New in ASP.NET 4.0, Visual Studio 2010 IDE

13 Jan 2010 by Abdul Sami, PMP

This article is an introduction to some of the new features in ASP.NET 4.0 and the Visual Studio 2010 IDE.

Automatic Code Generation from Database Model Diagram

21 Feb 2016 by Abdullah Al-Muzahid

This is a RAD tool which can be used to generate codes for CRUD operation in ASP.NET and C# automatically based on Database Model Diagram.

code-generation

How to save all grid view data into SQL server database in ASP.NET C#?

28 Sep 2016 by Abdullah Ibn Mannan

Its just missing a simple referenceusing System.Web.UI.WebControls;That's it ? or you having problem saving grid-view row data ?

url routing like as subdomain in asp.Net web Forms c#

23 Apr 2013 by abdussalam143

I want url routing like as sub domain. For example my website is abc.com so that now i wants to url rewriting like user1.abc.com,user2.abc.com,user3.abc.com,user(N).abc.com Also when ever once user is registered,After that user can directly open site like:...

url routing like as subdomain in asp.Net web Forms c#

29 Apr 2013 by abdussalam143

I want url routing like as sub domain.For example my website is abc.com so that now i wants to url rewriting likeuser1.abc.com,user2.abc.com,user3.abc.com,user(N).abc.comAlso when ever once user is registered,After that user can directly open site like:...

My Experiences with the 'Sys is undefined' Javascript error

17 Aug 2012 by Abey Thomas

This is an issue which can happen for a variety of reasons - but how do you find the right one?

PDF file creation using the ItextSharp library with ASP.NET

31 Mar 2009 by Abhay Mhatre

PDF file creation using the ItextSharp library with ASP.NET and C#, and deleting the file from the server after displaying it.

How to Bind Derived Type in MVC View

9 May 2013 by Abhay@Accenture

How to bind Derived Type in MVC View

web_development

LinqDataSource with ASP.NET Data Controls [Part III]

27 Oct 2009 by abhigad

Using LinqDataSource with ASP.NET data controls like gridview and dropdown list

LinqDataSource with ASP.NET data controls [Part IV]

23 Jun 2008 by abhigad

Using LinqDataSource with ASP.NET data controls like gridview and dropdown list

LinqDataSource with ASP.NET data controls

18 Jun 2008 by abhigad

Using LinqDataSource with ASP.NET data controls like gridview and dropdown list

Using LinqDataSource with ASP.NET data controls [Part II]

18 Jun 2008 by abhigad

Part II of the Using LinqDataSource with ASP.NET data controls like gridview and dropdown list

Displaying Images from a Database in a GridView

9 Dec 2010 by Abhijit Jana

A simple guide for beginners, explaining one method of displaying images taken from a database on a GridView inside an ASP.NET web page

web_development

DotNetNuke: User Creation and Role Assignment: For Absolute Beginners!

26 Sep 2009 by Abhijit Jana

Beginners' overview of creating DNN Users, Roles and Assign User with Roles

How to add a mouseover event for linkbutton. (asp.net)

7 Nov 2010 by Abhinav S

See here[^].

Exporting database data to a text file

13 Aug 2011 by Abhinav S

You have create an object of the StreamWriter class.However, you need to write to it using the Write() or WriteLine() method.You are simply writing text to a label - lblMessage.Text.

Is there any advantage of using multiple DB in one application ?

13 Sep 2011 by Abhinav S

If you can write your code generic enough to replace one db with another, then this would add to the sale value of the application. One client can use, say, MySQL while another client can use SQL Server with the same application.However, do this only when you think it is worth the effort....

want auto fill code

27 Jan 2014 by Abhinav S

Tryhttp://www.asp.net/ajaxlibrary/ajaxcontroltoolkitsamplesite/combobox/combobox.aspx[^]http://demos.telerik.com/aspnet-ajax/combobox/examples/functionality/autocompleteclientside/defaultcs.aspx[^]http://www.dotnetjohn.com/articles.aspx?articleid=215[^]

When 1 User Timesout other users cannot get it

18 Mar 2014 by Abhinav S

Once the application times out, take them to the login page.Other users should then be able to generate their own authentication ticket and login.

How do I save a file to DB?

26 Jan 2015 by Abhinav S

Try these links -Upload and Download Files with SQL Server in ASP.NET[^]Storing Binary Files Directly in the Database Using ASP.NET 2.0[^]Save Files to SQL Server Database using FileUpload Control[^]

Difference between www.google.com and m.google.com

3 Mar 2015 by Abhinav S

One is for the web and the other is for the mobile.

How to track if document is printed or canceled.

3 Jan 2016 by Abhinav S

If your printer provides an API through which you can read the documents being printed, you will be able to track a printed doc.For example, here is an Embedded Capture Solution from HP - HP Embedded Capture Solution | HP® Official Site[^].

Need Purchasing and Receiving Guide

15 Jan 2016 by Abhinav S

Some sample links that might help you -Purchase management system developed in asp.net c# in offshore development center in India - YouTube[^]A simple POC using ASP.NET Web API, Entity Framework, Autofac, Cross Domain Support[^]

How to run a windows form application automatically at regular interval of time of 1 min.

14 Jan 2014 by Abhisar Garg

I want to create an application that need to get opened/runned automatically after every 5 mins..

Beginer question about web service c#

31 Jan 2013 by Abhishek Pant

Webservice-ASP.net-Capsule[^]...

Need help in fetching the image from database

7 Feb 2013 by Abhishek Pant

storing and retriving images from database using ASP.NET[^]Save and Retrieve Images from the Database using ASP.NET 2.0 and ASP.NET 3.5[^]

SQL-Server-2008

Visual Studio 2005 Project And Item Templates

11 Jun 2010 by Abhishek Sur

All about Project and Item Templates. You can use Custom Templates to make your development process faster than you ever think. Create your own Template for Visual Studio and distribute with all others. You can also learn how to create an installer to install a template.

Compress Response and HTML WhiteSpace Remover

26 Jul 2009 by Abhishek Sur

Use of GZipStream or DeflateStream to compress your HTML output in your response when available. Added new class as WhiteSpaceFilter to remove whitespaces from HTML.

How to name a URL

15 Aug 2009 by Abhishek Sur

MVC applications does so using URL rewriting. Hope that approach is good for you. Abhishek SurMy Latest ArticlesCreate CLR objects in SQL Server 2005C# Uncommon KeywordsRead/Write Excel using OleDBDon't forget to click "Good Answer" if you like to.

The underlying connection was closed

12 Jan 2010 by Abhishek Sur

Well, Actually I showed how to do this. Did you read the article I specified. I think you need to modify the Machine.config as it will always override the value with this one. Normal files in asp.net defaults to 4,096 kilobytes(4MB), if you need larger than this, go to \System...

The underlying connection was closed

11 Jan 2010 by Abhishek Sur

I think you need to use Check this lovely article :http://msdn.microsoft.com/en-us/kb/kb00323245.aspx#XSLTH3150121122120121120120[^]Cheers:rose:

20 Sep 2010 by Abhishek Sur

It is how you create your CSS and html correctly. If you want it from client side, why dont you create the whole thing in client end. Use this :http://www.dynamic-tools.net/toolbox/popUp/[^]From client end handle the popup correctly using javascript.

web_development

Save Changes on Close of Browser or When Exiting the Page

24 Sep 2007 by Abishek R Srikaanth

This article will show how to save changes on the close of the browser or when exiting a page.

AutoEventWireup attribute in Microsoft ASP.NET Web Forms

30 Jan 2005 by Aby Thomas Varghese

An introduction to the AutoEventWireup attribute in Microsoft ASP.NET Web Forms.

Simple GridView Radio Button Row Selector

19 Feb 2008 by Adam Crawford

A custom web control to add radio button selection to the GridView control.

Five Essential Front-End Tools That Should be Used with Modern MVC Projects

25 Jun 2013 by Adam Tibi

VS 2012 web templates come preloaded with standard front-end libraries. This post is meant to complete the list with other essential and productive libraries that should be used in modern public-facing MVC and webform projects.

Universal Numeric Edit Control

17 Sep 2013 by Adam Zgagacz

User control for editing numbers writtem using different numeral base.

How to host website to IIS with domain

22 Jan 2020 by AdamASPGeek

You purchase manage or unmanage server? If you purchase unmanaged plan, then you need to setup your DNS, please point your domain to your A record in order to host your domain.

Distribute your site's contents with RSS 2.0

28 Sep 2007 by AdamNThompson

Distribute your site's contents with RSS 2.0 using ASP.NET/VB.NET/MS SQL Server 2005.

SQL-Server-2005

How to set the menu width using css

26 May 2009 by adatapost

Please refere this link http://www.highdots.com/css-tab-designer/[^] A DATAPOST COMPUTER CENTRE (K.V Prajapati)

How to set the position of a Dynamic Label in Asp.net using C#

2 Oct 2013 by Adityaece29

trylblShow.Location=new point(e.X,e.Y);orlblShow.Location=new point(100,200);will work :)