ASP.NET GridView 進階教學（四）：RowDeleting 事件處理與 DataKeys 主鍵刪除

刪除按鈕設定

• CommandField.ShowDeleteButton = True → 自動產生刪除連結，觸發 RowDeleting。
• ButtonField.CommandName = "Delete" → 同樣觸發 RowDeleting。

後台程式碼

protected void Page_Load(object sender, EventArgs e) 
{
    if (!IsPostBack) 
    {
        GridView1.DataSource = new ClientInfoAccessObj().GetAllClients();
        GridView1.DataBind();
    }
}

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) 
{
    var accessor = new ClientInfoAccessObj();
    int clientID = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);
    accessor.DeleteClientInfoForID(clientID);
    ClientScript.RegisterClientScriptBlock(this.GetType(), "info", "alert('記錄被刪除');", true);
    GridView1.DataSource = accessor.GetAllClients();
    GridView1.DataBind();
}

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e) 
{
    // 除錯用：顯示按鈕指令資訊
    lblInfo.Text = string.Format("CommandName={0}, CommandArgument={1}", e.CommandName, e.CommandArgument);
}

重點

• 透過 DataKeys[e.RowIndex] 安全取得主鍵，避免暴露於前端。
• 刪除後立即重新綁定，畫面即時更新。