DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();
checkBoxColumn.Name = "select";
checkBoxColumn.HeaderText = "选择";
dgv_M.Columns.Insert(0, checkBoxColumn);
DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();
checkBoxColumn.Name = "select";
checkBoxColumn.HeaderText = "选择";
dgv_M.Columns.Insert(0, checkBoxColumn);