GridView Binding using Datatable

you can try this way

<asp:TemplateField>
                   <ItemTemplate>
                       <asp:Button ID="btnDelete" runat="server" Text="Delete" CommandName="Delete"/>
                   </ItemTemplate>
               </asp:TemplateField>

protected void grvTest_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Delete")
{
GridViewRow row = (GridViewRow)((Button)e.CommandSource).NamingContainer;

DataTable dt = (DataTable)Session["CurrentTable"];

dt.Rows.Remove(dt.Rows[row.RowIndex]);
grvTest.DataSource = dt;
grvTest.DataBind();
}
}