如何在asp.net FormView控件中隱藏“編輯”按鈕？

Question

我想隱藏位於FormView控件的ItemTemplate中的“ EditButton”。

這是我嘗試過的FormView的OnDataBound代碼：

protected void fvPhaudDets_OnDataBound(object sender, EventArgs e)
    {
        PrincipalContext ctx = new PrincipalContext(ContextType.Domain);

        PrincipalSearchResult<Principal> groups = UserPrincipal.FindByIdentity(ctx, User.Identity.Name).GetAuthorizationGroups();

        IEnumerable<string> groupNames = groups.Select(x => x.Name);

        string mode = fvPhaudDets.CurrentMode.ToString();
        lblCrntMode.Text = mode;

        if (fvPhaudDets.CurrentMode == FormViewMode.ReadOnly)
        {
            Button editbtn = fvPhaudDets.FindControl("EditButton") as Button;

            //Determine authorization based on the user's AD security groups
            if (groupNames.Contains("SecGroup1"))
            {
                editbtn.Visible = false;
            }
            else
            {
                editbtn.Visible = true;
            }
        }
    }

這是我得到的錯誤：

System.NullReferenceException: 'Object reference not set to an instance of an object.'

也許問題在於代碼是在頁面上呈現整個FormView之前執行的？

如果當前用戶是SecGroup1的成員，如何修改代碼以確保FormView的ItemTemplate中的“ EditButton”被隱藏？

- 編輯 -

這按預期工作...

if (fvPhaudDets.CurrentMode == FormViewMode.ReadOnly)
    {
        LinkButton editbtn = fvPhaudDets.FindControl("EditButton") as LinkButton;

        if (editbtn != null && groupNames.Contains("SecGroup1"))
        {
            editbtn.Visible = true;
        }
    }

Answer 1

嘗試這個：

protected void fvPhaudDets_DataBound(object sender, EventArgs e)
        {
          ((LinkButton) ((FormView)sender).FindControl("EditButton")).Visible = false;// Hides Edit button
          ((LinkButton) ((FormView)sender).FindControl("NewButton")).Visible = false;// Hides New button
          ((LinkButton) ((FormView)sender).FindControl("DeleteButton")).Visible = false;// Hides Delete button
        }

另一個解決方案：編輯模板，然后將鏈接按鈕的屬性更改為Visible= false或從模板中刪除按鈕本身。