在datalist中的面板中查找控件

Question

我有Datalist，在其中面板和内部面板标签，我想在datalist中的面板内找到标签。我做了我的代码，但它没有用好

protected void DataList1_ItemDataBound（object sender，DataListItemEventArgs e）     {

    Label LblHead = e.Item.FindControl("Label1") as Label;
    string LanguageID = Globals.GetSuitableLanguage(Page);

    if (LanguageID == "ar")
    {
        LblHead.Attributes.Add("CssClass", "hed_logo2");
    }
       }

Answer 1

添加以下检查，

if (e.Item.ItemType == ListItemType.Item || 
                 e.Item.ItemType == ListItemType.AlternatingItem)
{
    // your code here
}   

Answer 2

此代码应该可以在我的本地测试：

protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        Panel panel1 = e.Item.FindControl("Panel1") as Panel;   //assume your panel name is Panel1
        if (panel1 != null)
        {
            Label LblHead = panel1.FindControl("LblHead") as Label;
            if (LblHead != null)
            {
                string LanguageID = Globals.GetSuitableLanguage(Page);
                if (LanguageID == "ar")
                {
                    LblHead.Attributes.Add("CssClass", "hed_logo2");
                }
            }
        }
    }
}