Hi,
I've got a gridview that I bind programmatically to a view of a typed
dataset. One column has a command button, and in the RowCreated event, I test
to see if it's a DataRow, and if it is, I grab the button and attach a value:
{
Response.Write("<br/>" + e.Row.Cells[1].Controls[0].ToString() +
"<br/>");
// Retrieve the LinkButton control from the first column.
Button addButton = (Button)e.Row.Cells[1].Controls[0];
// Set the LinkButton's CommandArgument property
addButton.CommandArgument =
((DataRowView)e.Row.DataItem)["RowID"].ToString();
}
}
This works fine when the page loads (and I see the response.write). When I
click the button for a row, however, I get a null reference exception, not in
the RowCommand handler but in the RowCreated handler (likely because my data
source is not persisted, and I'm not refreshing my dataset from the database
or grabbing it from viewstate on postback - i didn't expect RowCreated to
fire again).
As a test, I replaced the line
addButton.CommandArgument = ((DataRowView)e.Row.DataItem)["RowID"].ToString();
with:
addButton.CommandArgument = Convert.ToString(1);
I expected to get around the null reference error, which I did, but now, I
didn't get the response.write! This seems to indicate that with this change,
it didn't even fire the RowCreated event when it was doing the RowCommand,
which it seemed to when I was getting the null reference exception.
So: when a rowcommand is fired, is a rowcreated event fired also? Is this
based on some condition? (I don't do any rebinding on postback)
Thanks for any help for this foggy situation.
-Ben
