The default DataGrid-WebControl shipping with the .NET-Framework already is a powerful control to display and edit data in table form. But when trying to implement the DataGrid in a fixed layout site the sizing behavior of the DataGrid becomes a problem: the number of rows and with it the height of the DataGrid may vary depending on the number of records to be displayed. Workaround in this good article by Alexander Zeitler.
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http://www.aspheute.com/english/20030909.asp