private void button21_Click(object sender, EventArgs e)
{
using (OpenFileDialog dlg = new OpenFileDialog())
{
dlg.Filter = "Smart Layout Document(*.gxd)|*.gxd";
if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
IGxdDocument doc = GxdDocument.LoadFrom(dlg.FileName);
_host.ApplyGxdDocument(doc);
_host.Render();
}
}
}