/// <summary>
/// 删除字段
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn_Delete_Click(object sender, EventArgs e)
{
if (null == this.dataGridView1.SelectedCells ||
1 > this.dataGridView1.SelectedCells.Count)
{
MessageBox.Show("请选择要删除的列。");
return;
}
//新建选择列列表
List <DataGridViewColumn> colsToDel = new List <DataGridViewColumn>();
for (int i = 0; i < this.dataGridView1.SelectedCells.Count; i++)
{
//获取到datagridView中选中的列信息
var column = this.dataGridView1.Columns[this.dataGridView1.SelectedCells[i].ColumnIndex];
if (!colsToDel.Contains(column))
{
//添加列信息
colsToDel.Add(column);
}
}
//提示是否删除
if (MessageBox.Show(string.Format("是否删除{0}字段？\n此操作不可撤销。", string.Join(",", colsToDel.AsEnumerable().Select(c => c.Name))),
"消息", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
//获得所有要素
GSOFeatures features = _layer.GetAllFeatures();
//遍历选中列的列表
foreach (var item in colsToDel)
{
//遍历所有要素
for (int i = 0; i < features.Length; i++)
{
GSOFeature feature = features[i];
//获取选中列在要素属性表中的索引
int index = feature.GetFieldIndex(item.Name);
//删除该字段
feature.DeleteField(index);
}
//同时删除控件中的列
this.dataGridView1.Columns.Remove(item);
}
//保存图层
_layer.Save();
}
}