启用分页后，Gridview 在回发时消失

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    GridView1.PageIndex = e.NewPageIndex;
    BindDataToGridView();
}

protected void ObjectDataSource1_Selecting(object sender, ObjectDataSourceSelectingEventArgs e)
{
    e.Cancel = true;
    BindDataToGridView();
}

protected void SqlDataSource1_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
{
    e.Cancel = true;
    BindDataToGridView();
}

protected void EntityDataSource1_Selecting(object sender, EntityDataSourceSelectingEventArgs e)
{
    e.Cancel = true;
    BindDataToGridView();
}