[ADO.NET][Winform] dataGridView 裡的 DataGridViewComboBoxColumn 欄位資料繫結

先準備好類別欄位資料

public enum Sex
{
    Man,
    Woman
};


public class Member
{
    public int ID { get; set; }
    public string Name { get; set; }
    public Sex Sex { get; set; }
}

然後在用戶端裡綁定控制項

BindingList<Member> _members = null;
BindingSource _memberSource = new BindingSource();
private void Form1_Load(object sender, EventArgs e)
{
    this._members = new BindingList<Member>() 
    { 
        new Member() { ID = 2, Name = "GY1", Sex = Sex.Man,IsJoin=true }, 
        new Member() { ID = 2, Name = "GY2", Sex = Sex.Man,IsJoin=false }, 
        new Member() { ID = 3, Name = "GY3", Sex = Sex.Woman,IsJoin=true },
        new Member() { ID = 4, Name = "GY4", Sex = Sex.Man ,IsJoin=false} 
    };
    this._memberSource.DataSource = this._members;
    this.bindingNavigator1.BindingSource = this._memberSource;
    this.dataGridView1.DataSource = this._memberSource;
    this.dataGridView1.AutoGenerateColumns = true;//開始重繪欄位
}

執行結果就會像下面那張圖，dataGridView1在綁定時不會幫我們建立DataGridViewComboBoxColumn欄位

我們可以利用AutoGenerateColumns 屬性來停止自動建立欄位，用我們自己想要呈現的DataGridViewColumn樣式

private void Form1_Load(object sender, EventArgs e)
{
    this._members = new BindingList<Member>() 
    { 
        new Member() { ID = 2, Name = "GY1", Sex = Sex.Man,IsJoin=true }, 
        new Member() { ID = 2, Name = "GY2", Sex = Sex.Man,IsJoin=false }, 
        new Member() { ID = 3, Name = "GY3", Sex = Sex.Woman,IsJoin=true },
        new Member() { ID = 4, Name = "GY4", Sex = Sex.Man ,IsJoin=false} 
    };
    this._memberSource.DataSource = this._members;
    this.bindingNavigator1.BindingSource = this._memberSource;
    this.dataGridView1.AutoGenerateColumns = false;//停止重繪欄位
    this.dataGridView1.DataSource = this._memberSource;

    createColumns();
    this.dataGridView1.AutoGenerateColumns = true;//開始重繪欄位，補足還沒建立的欄位
}

建立DataGridViewComboBoxColumn欄位

void createColumns()
{
    DataGridViewComboBoxColumn columnID = new DataGridViewComboBoxColumn();
    columnID.HeaderText = "ID";
    columnID.Name = "ID";
    columnID.DataPropertyName = "ID";
    columnID.Items.AddRange(new object[] { 1, 2, 3, 4 });

    DataGridViewComboBoxColumn columnSex = new DataGridViewComboBoxColumn();
    columnSex.HeaderText = "Sex";
    columnSex.Name = "Sex";
    columnSex.DataPropertyName = "Sex";
    columnSex.DataSource = Enum.GetValues(typeof(Sex));//建立下拉選單

    this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] { columnID, columnSex });
}

結果如下，搞定收工!

---

後記：dgvBindingEnum.zip

這是一個蠻常見的用法，使用DataGridViewComboBoxColumn可以確保資料能被輸入正確的格式，有一件事必須要注意

它在STA下執行不會有錯誤

不過當一改成MTA後，操作 DataGridViewComboBoxColumn 就會出現以下錯誤