private void btnTable_Click(object sender, EventArgs e)
 {
     FormTable fTable = new FormTable();
     fTable.Show();
 }
        private void 打开属性表ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FormTable Ft = new FormTable(pGlobalFeatureLayer as IFeatureLayer);

            Ft.Show();
        }