Hello Gary,
For those ASP.NET 2.0 DataBound controls, since it provides a new
DataSource control bound model(you can add the binding relation at
design-time or runtime), you should use the "DataSourceID" property instead
of the DataSource(which is dedicated for programmatic databinding) to
control the databound control's associated datasource.
So for your scenario, since you've choosed an objectdatasource for your
GridView at design-time, the DataSource control ID has been save in the
GridView's DataSourceID property. In sequential requests(include
postback), even if you manually change GridView.DataSource, Gridview will
still use the "DataSourceID" (the associated datasouce control) to populate
data collection. Thus, you can simply change Gridview.DataSourceID to
empty string and call databind to clear it. e.g.
===============
protected void Button1_Click(object sender, EventArgs e)
{
GridView1.DataSourceID = string.Empty;
GridView1.DataBind();
}
================
Hope this helps.
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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