datagrid crashes program when loading on the fly

[polarz]

here are the lines of code that I've tried. All crash the program

shownVals is a string array
data is my datatable

//problem code #1

loop here{
((Form1)NewsMyW ay.Form1.Active Form).data.Rows .Add(shownVals) ;
}

//problem code #2

((Form1)NewsMyW ay.Form1.Active Form).data.Begi nLoadData();

loop here{

((Form1)NewsMyW ay.Form1.Active Form).data.Load DataRow(shownVa ls,false);

}

((Form1)NewsMyW ay.Form1.Active Form).data.EndL oadData();

//problem code #3

loop here{
((Form1)NewsMyW ay.Form1.Active Form).data.Begi nLoadData();
((Form1)NewsMyW ay.Form1.Active Form).data.Load DataRow(shownVa ls,false);
((Form1)NewsMyW ay.Form1.Active Form).data.EndL oadData();
}

I'm pulling data from the internet and trying to put it into my
dataGrid on the fly but I always recieve a

System.NullRefe renceException

when the grid is populating or a few seconds after it has finished.
I've also tried to throw in

((Form1)NewsMyW ay.Form1.Active Form).data.Acce ptChanges();

in various spots in my code but that does nothing. When I save the
downloaded data to a txt file I can import the data to the grid fine.
Unless there is too much data, that also causes a crash but is another
issue. I'm at a loss :/
Any suggestions are much appreciated. Thank you

[Zürcher See]

You use a "working" thread to load the data in the dataset?

Try to use the following piece of code:

Form1 f=(Form1)NewsMy Way.Form1.Activ eForm;
f.Invoke(f.data .Rows.Add,shown Vals);
"polarz" <po****@hotmail .com> schrieb im Newsbeitrag
news:t3******** *************** *********@4ax.c om...

here are the lines of code that I've tried. All crash the program

shownVals is a string array
data is my datatable

//problem code #1

loop here{
((Form1)NewsMyW ay.Form1.Active Form).data.Rows .Add(shownVals) ;
}

//problem code #2

((Form1)NewsMyW ay.Form1.Active Form).data.Begi nLoadData();

loop here{

((Form1)NewsMyW ay.Form1.Active Form).data.Load DataRow(shownVa ls,false);

}

((Form1)NewsMyW ay.Form1.Active Form).data.EndL oadData();

//problem code #3

loop here{
((Form1)NewsMyW ay.Form1.Active Form).data.Begi nLoadData();
((Form1)NewsMyW ay.Form1.Active Form).data.Load DataRow(shownVa ls,false);
((Form1)NewsMyW ay.Form1.Active Form).data.EndL oadData();
}

I'm pulling data from the internet and trying to put it into my
dataGrid on the fly but I always recieve a

System.NullRefe renceException

when the grid is populating or a few seconds after it has finished.
I've also tried to throw in

((Form1)NewsMyW ay.Form1.Active Form).data.Acce ptChanges();

in various spots in my code but that does nothing. When I save the
downloaded data to a txt file I can import the data to the grid fine.
Unless there is too much data, that also causes a crash but is another
issue. I'm at a loss :/
Any suggestions are much appreciated. Thank you