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I have a DataTable with composite key bounded to the DataGrid.
So when the user inserts some data which violates the constraint, an exception is thrown.
What is the right place (event etc) to do any additional custom Validation?
Another problem is the the message that DataTable throws is not user friendly? How can I stop it and give a more meaningful message?
The message I got is
"Error when committing the row to the original data store"
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You can add and event handler for the RowChanging event of your datatable.
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Thanks a lot for the reply.
I tried this before, but I want the DataGrid to do the actual validation but I want to give a custom message. But in case of the solution you have specified, the DataGrid itself shows a MessageBox with a message which is not use friendly.
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does anyone out there know how create an autoupdate functionality in a windows Application. Lets say on the client a window pops up showing an update is ready for download.
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you can also try reading this
http://msdn.microsoft.com/smartclient/understanding/windowsforms/2.0/features/clickonce.aspx
http://msdn.microsoft.com/msdnmag/issues/04/05/clickonce/default.aspx
There is another article on msdn about clickonce, i cant seem to find it. 
even though click once is associated with VS 2005. November is only a few months away.
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Hi,
This is really taking toll of my project.
I have a windows service which copies files from different remote servers to local hard drive and process them.
The problem due some network issues service gets hang while coping the files.
Do we have good copy utility in .NET which can help, I am using FileInfo.CopyTo method.
Also please note I can not use FTP as our company does not allow to.
Thanks,
Nitin.
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Hi Buddy i am trying to do the same job but i am in ver basic level. So i have request to you if you could send me you artical, demo or code so i know how to do this job.
Please
Muhamad Waqas Butt
waqasb4all@yahoo.com
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I have a fairly robust Windows Forms application in which I allow the user to continously create and delete DataGrid objects. I have a number of references pointing to any one DataGrid object. Even after all references are nulled out to any one DataGrid object (and it is Removed from Forms.Controls), the memory used doesn't seem to be garbage collected. Even if I call GC.Collect.
I can see this because memory usage in the Windows task manager just grows and grows until the application slows to a halt. I even included a finalize method for the DataGrids, and it never gets called.
Obvious I still have some "dangling references" to the DataGrid objects I am creating.
My question...Is there any way to see (in the debugger?) a list of all the references still pointing to a single object?
Thanks!
Mark
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DataGrid need finalized before the GC will collect them, and finalization is a very low priority thread. To force them to be cleaned up ASAP, call Dispose when you're finished with them.
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Thanks Dan. At your advice, I tried that, but it seems to have no effect. In reality, I am using a TrueDBGrid from Component One, which functionally works like a .NET DataGrid. I am calling Dispose against it when I am done with it.
I overrode the finalize method of the grid and included a MessageBox inside. Every one of the discarded, disposed grids DOES get garbage collected when I close the application. I need them to get garbaged collected during the app.
Anyone have any other ideas?
Thanks!
Mark
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I wouldn't depend on Windows Task Manager, IMO, the performance counters (#Bytes in All Heaps..) are much more reliable.
If you're sure you're leaking memory, CLR Profiler[^] is a very handy utility that allows you to track objects in the managed heap.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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Wow! I didn't know something like CLR Profiler existed! Thanks!
I will give it a try and post back with the results.
Mark
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how do u terminate a void function? like break...
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f_n_d wrote:
how do u terminate a void function? like break...
just use return;
public void SomeMethod()
{
//do something
if(isReasonToTerminateMethod)
{
return; //terminate the method, no code after this line will be executed
}
//do something
}
"We contend that for a nation to try to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." — Winston Churchill
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Thanx man, you're a genius...
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Well, the your question was far from being unanswerable 
regards
modified 12-Sep-18 21:01pm.
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Is there an easy way to keep the bottom line of text visible in a textbox? It would seem to be a no-brainer for such things as log files in forms; however, I can find no documentation on how to do this, and everything I've tried is marginal at best. I'm betting there's something simple I've overlooked...
"Eschew Obfuscatory Verbiage"
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Did you try using AppendText instead of doing Text += [your text]?
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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Thanks! I knew it was easy.
Now, for the harder case: Can I scroll to the bottom line if I'm currently not displaying it?
"Eschew Obfuscatory Verbiage"
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When you do display it, set the SelectionBegin property to something beyond the length of the text. That'll do the trick, provided the textbox has the focus.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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this.textBox1.Multiline = true;
this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Both;
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Hello,
How can I add a textBoxColumn to my grid, with data from a different table?
In other words: I have a datagrid with datasource that has 4 columns and the first column is the DescriptionID, then I have another table with 3 columns: DescriptionID, Description, Units.
So, in my datagrid I want to display instead of the first column DescriptionID, two other columns Description, and Units.
Any ideas on how to do it in the bes way?
Thank you
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I would suggest creating a view by joining the two tables on the DescriptionID and use the view to populate the DataGrid.
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