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HTML code:

[align=left]int releId = this.ddlUserType.SelectedIndex;
this.gvUsers.DataSourceID = "odsUserByRoleId";
if (this.gvUsers.Rows.Count == 0)
{
this.gvUsers.DataSourceID = "odsUser";
}[/align]


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this.GridView1.DataSource = null;
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DataTable table = new DataTable();
        DataTable table1 = new DataTable();

        DataColumn c1 = new DataColumn("id1");
        table.Columns.Add(c1);
        DataColumn c2 = new DataColumn("id2");
        table1.Columns.Add(c2);