DataGridView控件中添加删除按钮，进行选中行的删除操作。
我在DataGridView控件绑定数据源后使用代码添加按钮（删除按钮），但是当执行一次删除之后，就会多出一列删除列，这是什么原因啊？？？？
代码如下：
//添加按钮列
dataGridView1.DataSource = ds.Tables[0].DefaultView;
DataGridViewButtonColumn ColumnDelete = new DataGridViewButtonColumn();
ColumnDelete.HeaderText = "删除";
ColumnDelete.Name = "删除";
ColumnDelete.Text = "删除";
this.dataGridView1.Columns.Add(ColumnDelete);
//删除操作
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
if (dataGridView1.Columns[e.ColumnIndex].Name == "delete")
{
//sql删除语句
}
}

当执行第一次删除时是成功的，但是成功之后多出一列删除列？？？？这是什么情况？？？

[解决办法]

C# code

conn = new SqlConnection(SQL.conStr);            conn.Open();            int row = this.dataGridView2.CurrentCell.RowIndex;            if (dataGridView2.CurrentRow != null)            {                if (MessageBox.Show("确定要删除该行数据吗？", "提示信息", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes)                {                    try                    {                        string ind = this.dataGridView2.Rows[row].Cells["流程环节编号"].Value.ToString();                        string inds = this.dataGridView2.Rows[row].Cells["主机型号"].Value.ToString();                        SqlCommand cmDelete = new SqlCommand("delete from hostmodel_process where process_id = '" + ind + "' and host_model='"+inds+"'", conn);                        cmDelete.ExecuteNonQuery();                        MessageBox.Show("删除成功!");                        string sql = "select host_model as 主机型号,process_id as 流程环节编号 from hostmodel_process order by host_model,process_id asc";                        SDA1 = new SqlDataAdapter(sql, conn);                        DT1 = new System.Data.DataTable();                        SDA1.Fill(DT1);                        this.dataGridView2.DataSource = DT1;                        cmDelete.Dispose();                        conn.Close();                    }                    catch (Exception ex)                    { MessageBox.Show(ex.Message); }                }            }        }