private void 添加字段ToolStripMenuItem_Click(object sender, EventArgs e)
 {
     FrmAddFieldToLayer addField = new FrmAddFieldToLayer(geoLayer, dataGridView1);
     addField.Show(this);
 }
        private void 添加字段ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FrmAddFieldToLayer addField = new FrmAddFieldToLayer(geoLayer, dataGridView1);

            addField.Show(this);
        }