private void button4_Click(object sender, EventArgs e) { string sShpFileName = @"H:\GDAL\po.shp"; Shpread a = new Shpread(); a.InitinalGdal(); a.GetShpLayer(sShpFileName); //bool c= a.GetGeometry(Convert.ToInt32(textBox3.Text)); a.GetGeometry(int.Parse(textBox4.Text)); textBox3.Text = a.a; }