相对第四节的更新数据来说要删除条目就简单多了。关键步骤如下:
增加一个删除的按钮列,怎么增加参照第四节讲的。
设置DataGrid的DataKeyField属性,必须设置为数据库的关键字。
添加DeleteCommand事件,编写代码:
public void MyDataGrid_Delete(Object sender, DataGridCommandEventArgs e)
{
String deleteCmd = "DELETE from Employee where emp_id = @Id";
SqlCommand myCommand = new SqlCommand(deleteCmd, myConnection);
myCommand.Parameters.Add(new SqlParameter("@Id", SqlDbType.NVarChar, 11));
myCommand.Parameters["@Id"].Value = MyDataGrid.DataKeys[(int)e.Item.ItemIndex];
myCommand.Connection.Open();
try
{
myCommand.ExecuteNonQuery();
}
catch (SqlException)
{
}
myCommand.Connection.Close();
BindGrid();
}
本文地址:http://com.8s8s.com/it/it42909.htm