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SPGridView Not Appearing When Rows Exist

Posted By:      Posted Date: August 26, 2010    Points: 0   Category :SharePoint
 

I have added the contents of a DataTable to an SPGridView control.  When there are no rows in the DataTable it shows the message "There Is No Data" which is correct. 

When there are rows in the DataTable the SPGridView does not appear at all.

What could the issue be?

The code is below:

DataTable gridTable = new DataTable();
gridTable.Columns.Add("Assigned To");
gridTable.Columns.Add("Comment");
gridTable.Columns.Add("Outcome");		

queryDPM.ViewFields = "<FieldRef Name='AssignedTo'/>" +
					  "<FieldRef Name='RequestDPMReviewerComments' />" +
					  "<FieldRef Name='WorkflowOutcome' />";

sQueryStr = "<Where>" +
				 "<And>" +
					"<IsNotNull>" +
					 "<FieldRef Name='RequestDPMReviewerComments' />" +
					 

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