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我想創建一個自定義控件,並在下面顯示渲染方法。ASP.Net自定義控件渲染錯誤
我在bulletList.RenderControl(Writer)上得到一個「未設置爲對象實例的對象引用」錯誤;線。
任何想法?
protected override void Render(HtmlTextWriter Writer)
{
if (TermSetList != null && TermSetList.Count > 0)
{
BulletedList bulletList = new BulletedList();
bulletList.Click += new BulletedListEventHandler(BulletListItem_Click);
bulletList.DisplayMode = BulletedListDisplayMode.LinkButton;
bulletList.CssClass = "tabs";
foreach (KeyValuePair<String, String> item in TermSetList)
{
ListItem listItem = new ListItem();
listItem.Text = item.Key;
listItem.Value = item.Value;
bulletList.Items.Add(listItem);
}
if (!this.Page.IsPostBack)
{
bulletList.Items[0].Selected = true;
}
bulletList.RenderControl(Writer);
base.Render(Writer);
}
}
你穿過它嗎? Writer對象在Render方法接收時是否正確實例化? – 2011-05-27 16:20:57