protected void OnCustomCallback(object sender, ASPxGridViewCustomCallbackEventArgs e)
{
if (e.Parameters.IndexOf(ColumnVisibilityManager.CvmCallbackPrefix) == 0)
{
ColumnVisibilityManager.ProcessCallback(sender as ASPxGridView, e.Parameters);
}
else
{
throw new InvalidOperationException("Invalid callback parameters.");
}
}
protected void Page_Load(object sender, EventArgs e)
{
ColumnVisibilityManager columnVisibilityManager = new ColumnVisibilityManager(gvGrid);
Form.Controls.AddAt(0, columnVisibilityManager);
}