Row Selection Object reference not set to an instance of an object

Ashwin posted over 13 years ago

I get the above error for the following line of code.

this.webdatagrid1.Behaviors.Selection.SelectedRows[i].Items[0].Value

I get the row count correctly, but I get a system.nullreferenceexception. I know for a fact that the values are not null.

Help me Infragistics gurus!!

90

Ashwin posted over 13 years ago in reply to [Infragistics] David Young

public

void SelectedTools(object sender, EventArgs e)
{

int rowcount =0;

string sesstools = "";

Debug.WriteLine("The session tool is " + sesstools);
rowcount =

Convert.ToInt32(this.WebDataGrid1.Behaviors.Selection.SelectedRows.Count);

Debug.WriteLine(rowcount);

int[] selectedtools = new int[rowcount];

if (rowcount > 0)
{

for (i = 0; i < rowcount; i++ )
{

Debug.WriteLine(this.WebDataGrid1.Behaviors.Selection.SelectedRows[i].Items[0].Value);
selectedtools[i] =

Convert.ToInt32(this.WebDataGrid1.Behaviors.Selection.SelectedRows[i].Items[0].Value);

if(i== rowcount-1)
{sesstools = sesstools + selectedtools[i];

}

else

sesstools = sesstools + selectedtools[i] +

", ";

}

}
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Ashwin posted over 13 years ago in reply to [Infragistics] David Young

Enabling Cross page selection does not help.

I continue to get the following line in the output

'System.NullReferenceException' occured in App_Web_5rv4keyr.dll.
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Ashwin posted over 13 years ago in reply to [Infragistics] David Young

This is not happening in a particular event, it's just function executed on button click. I've not enabled crosspageselection. Let me give that a shot.

Hang on.

Thanks,
Ashwin
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Ashwin posted over 13 years ago

The problem is especially evident after the virtual scrolling refresh happens. I'm using version 2011
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[Infragistics] David Young posted over 13 years ago

Hi ashwinnayak86,

Which object is null? The selected row that is returned? Do you have EnableCrossPageSelection on? If that is the case and the selected row is not always returned if we cannot find a row in the Rows collection that matches the data key we have stored at that index. Which event was this happening in?

regards,
David Young
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