C# DataGridViewComboBoxColumn 数据绑定

dataGridView1.Columns.Clear();
dataGridView1.AutoGenerateColumns = false;
dataGridView1.DataSource = dt;  

DataGridViewComboBoxColumn comUserName= new DataGridViewComboBoxColumn();
comUserName.DataPropertyName = "userName";//**设置数据源属性的名称
comUserName.HeaderText = "用户名";//列头显示的汉字
comUserName.DisplayStyle = DataGridViewComboBoxDisplayStyle.ComboBox;
comUserName.DataSource = dtAll;//下拉框绑定的数据源
comUserName.DisplayMember = "userName_chinese";//下拉框显示内容
comUserName.ValueMember = "userName";//要和上面**处的一样
dataGridView1.Columns.Add(comUserName);