C# Discussion Boards - CodeProject

Re: error when i try to not exit with program when i press button no in messagebox

OriginalGriff24-Jun-13 6:18

24-Jun-13 6:18

Then you need to start by looking at the button you press in the designer, and see where a click event is taking you. Because if the debugger isn't hitting the if condition, then it isn't executing that method... Laugh | :laugh:

The universe is composed of electrons, neutrons, protons and......morons. (ThePhantomUpvoter)

Re: error when i try to not exit with program when i press button no in messagebox

Bernhard Hiller24-Jun-13 21:58

Bernhard Hiller

24-Jun-13 21:58

Is that btnLogout also the CancelButton of your form?

Re: error when i try to not exit with program when i press button no in messagebox

User349024-Jun-13 23:16

User3490

24-Jun-13 23:16

yes i had set it as cancel button simultaneously.

Re: error when i try to not exit with program when i press button no in messagebox

Bernhard Hiller24-Jun-13 23:31

Bernhard Hiller

24-Jun-13 23:31

Then you must handle the Form Closing event, and set its Cancel property to true in case you do not want to close the form (in btnLogout_Click just do a this.Close()).

Re: error when i try to not exit with program when i press button no in messagebox

User349024-Jun-13 23:33

User3490

24-Jun-13 23:33

for the use that i want it i just make none the cancel button property that has the logout_click button Smile | :)

so i use only the command application.exit();
and when i press button logout and in messagebox NO then it stay in the form that i am at the same time

Display images in the Image data type XTraReport

nhanlaptrinh23-Jun-13 15:15

nhanlaptrinh

23-Jun-13 15:15

In his table with 1 column named 'Picture', Image data type, when you save the image successfully, but when the XTraReport intelligent display shows only the string column, but do not show columns Picture is, I wrote the following code to help you with you know, okay thanks in advance.

xrPictureBox1.DataBindings.Add("Image", DataSource, "Picture");

Re: Display images in the Image data type XTraReport

Pete O'Hanlon24-Jun-13 1:22

Pete O'Hanlon

24-Jun-13 1:22

Who is this aimed at? Is this meant to be a question? I can't tell because there seems to be a lot of confusion there.

If it's a question about displaying pictures in XTraReport, the DevXpress forums will be your best source for an answer. Try looking here[^] and entering XTraReport Picture as your search criteria.

I was brought up to respect my elders. I don't respect many people nowadays.

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Re: Display images in the Image data type XTraReport

nhanlaptrinh24-Jun-13 6:45

nhanlaptrinh

24-Jun-13 6:45

Me non not as a, helps me with, me to do.

Re: Display images in the Image data type XTraReport

Pete O'Hanlon24-Jun-13 7:11

Pete O'Hanlon

24-Jun-13 7:11

What? I appreciate that English isn't your first language, but that sentence makes no sense to me.

I was brought up to respect my elders. I don't respect many people nowadays.

CodeStash - Online Snippet Management | My blog | MoXAML PowerToys | Mole 2010 - debugging made easier

Re: Display images in the Image data type XTraReport

nhanlaptrinh30-Jun-13 15:06

nhanlaptrinh

30-Jun-13 15:06

I bind text data type is correct, but the wrong type of image. You see if that helps. The code I wrote is as follows:
Code in simpleButton4_Click

DataTable data = User.getInfo();
rptUser rpt = new rptUser();
rpt.DataSource = data;
rpt.BinData();
rpt.ShowPreview();

Code in xtrareport

public void BinData()
{
 xrTableCell3.DataBindings.Add("Text", DataSource, "username");
 xrTableCell4.DataBindings.Add("Text", DataSource, "full_name");
 xrPictureBox1.DataBindings.Add("Image", DataSource, "img");
}

Please help me! Frown | :(

modified 2-Jul-13 2:37am.

Call C++ Functions in C# (.NET 4.5)

Vimalsoft(Pty) Ltd23-Jun-13 10:48

Vimalsoft(Pty) Ltd

23-Jun-13 10:48

Good Day

I have a C++ Dll that has the following functions

void DisplayError( HWND hDlg, WPARAM wParam )
HRESULT ValidateI2CDeviceEx( HWND hDlg, ULONG i2cBase, PULONG pAccessBytes )
BOOL ValidateSetValue( HWND hDlg, char *str )
BOOL ValidateIdxValue( HWND hDlg, char *str )
ULONG atox( LPSTR s )
 EnableGroupBoxes( HWND hDlg )
LRESULT CALLBACK EM2800PropProc( HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam )
LRESULT CALLBACK About( HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam )
LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
VOID DestroyEM2800Prop()
VOID InitEM2800Prop()
ATOM MyRegisterClass( HINSTANCE hInstance )
BOOL InitInstance( HINSTANCE hInstance, int nCmdShow )
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
                      LPSTR lpCmdLine, int nCmdShow )

i would like to use this non-com dll in C# Link to DLL[]

Thanks

Vuyiswa Maseko,

Spoted in Daniweb-- Sorry to rant. I hate websites. They are just wierd. They don't behave like normal code.

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
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vuyiswa[at]dotnetfunda.com
http://www.Dotnetfunda.com

Re: Call C++ Functions in C# (.NET 4.5)

Bernhard Hiller23-Jun-13 21:04

Bernhard Hiller

23-Jun-13 21:04

Do some DllImport, and make use of PInvoke. See e.g. http://msdn.microsoft.com/en-us/library/aa288468%28v=vs.71%29.aspx[^] and for more complicated things http://pinvoke.net/[^]

Re: Call C++ Functions in C# (.NET 4.5)

Vimalsoft(Pty) Ltd23-Jun-13 21:04

Vimalsoft(Pty) Ltd

23-Jun-13 21:04

Thanks that should do

axWindowsMediaplayer memory leak

john0022-Jun-13 22:45

john00

22-Jun-13 22:45

Hello,

when I am using axWidowsmediaPlayer and Dispose it afterwards. I get memory leaks. The mediaplayer is dynamically created with each usage and after some time disposed. Every single instance stays in memory until the system crashes.

I need help here. Could't find anything useful on the net.

The exceptions when disposing are:
System.Runtime.InteropServices.InvalidComObjectException
"COM object that has been separated from its underlying RCW cannot be used"

I already posted my problem here:
http://www.codeproject.com/Questions/610465/MemoryplusLeaksplusinplusWindowplusMediaplusPlayer

It ist the same problem as this one:
http://www.codeproject.com/Questions/155836/Memory-Leaks-in-Window-Media-Player-c

Sinde there is no answert to that since 2011 I wanted to know is someone knows the answer.

Please help. I am running out of ideas. Thanks.

Re: axWindowsMediaplayer memory leak

Bernhard Hiller23-Jun-13 21:08

Bernhard Hiller

23-Jun-13 21:08

john00 wrote:
...is dynamically created with each usage... Every single instance stays in memory until the system crashes

Exactly that is the problem. Why don't you instantiate just one single instance, use it for all the files to be played, and then dispose of it correctly when you close your program?
The exception you show is just a consequence of the wrong code, not its cause.

Re: axWindowsMediaplayer memory leak

john0023-Jun-13 21:45

john00

23-Jun-13 21:45

I have to do it like that because I want to play more than one video at the same time and want to be able to use the form to show pictures without video

=> operator in C#

trinh.nguyen22-Jun-13 18:35

trinh.nguyen

22-Jun-13 18:35

I am new to C#, so any one can help me to understand the => operator in C# or give me some resource on this.

Thanks in advanced.

Re: => operator in C#

Abhinav S22-Jun-13 18:38

Abhinav S

22-Jun-13 18:38

This (=>) is called the Lambda operator.
This will help you generate lambda expressions.

You specify input parameters (if any) on the left side of the lambda operator =>, and you put the expression or statement block on the other side.
For example, the lambda expression x => x * x specifies a parameter that’s named x and returns the value of x squared.

Apps - Color Analyzer | Arctic | XKCD | Sound Meter | Speed Dial

Re: => operator in C#

trinh.nguyen22-Jun-13 18:53

trinh.nguyen

22-Jun-13 18:53

Thanks Abhinav S so much!

Re: => operator in C#

XoulsZ23-Jun-13 11:00

XoulsZ

23-Jun-13 11:00

The => operator in C# is for an example
if your int is equals or more then the other int.
I hope this help Big Grin | :-D

//XoulsZ

Re: => operator in C#

Bernhard Hiller23-Jun-13 21:11

Bernhard Hiller

23-Jun-13 21:11

No, that's wrong. Let me tell you: => != >= !

Re: => operator in C#

Rahul Rajat Singh24-Jun-13 1:03

Rahul Rajat Singh

24-Jun-13 1:03

It has something to do with Lambda expressions. It is the syntax for lambda expressions in C#. For more details read this:

A Beginner's Tutorial on Basics of Delegates, Anonymous Functions and Lambda Expressions in C#[^]

Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore, Dream. Discover.

Re: => operator in C#

Amir Mohammad Nasrollahi29-Jul-13 7:10

Amir Mohammad Nasrollahi

29-Jul-13 7:10

reference link:
http://msdn.microsoft.com/en-us/library/vstudio/bb397687.aspx[^]

-Amir Mohammad Nasrollahi

/* LIFE RUNS ON CODE */

C# have linq to sql access config file

sc steinhayse22-Jun-13 10:41

sc steinhayse

22-Jun-13 10:41

I am having a linq to sql problem with a C# 2010 windows form application when it is changed to a dll and accessed by other applications. The purpose of the calling the code as a dll is for performance reasons and to share the code accross multiple applications.

When the application is on its own, it runs fine.

Basically when the linq to sql was dragged to the desktop, a default linq to sql connection was setup by the .net framework. However I changed the *.designer.cs to use the system.configuration namespace,
added a reference to the system.configuration namespace, and changed the default linq to sql connection to use the database connection obttained in app.config file. I also removed any refernces to the default database connections in the the 'properties or 'settings' section for each project file folder.

Now the problem is the default setting values to the database are reset by the .net framework. Thwe values in the app.config file are no longer being used.

Can you show me code, point me to a reference, and/or tell how I can make this application is the connection string values in the app.config file again?

Re: C# have linq to sql access config file

Richard MacCutchan22-Jun-13 23:49

Richard MacCutchan

22-Jun-13 23:49

sc steinhayse wrote:
I changed the *.designer.cs to use the system.configuration namespace,

You must not manually edit this file as it will get reset by Visual Studio. You need to add code elesewhere to manage your connection.

Use the best guess

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