在ItemDataBound事件中添加按钮 并使用按钮事件的问题

Question

    protected void GuestBookDL1_ItemDataBound(object sender, DataListItemEventArgs e)
    {        Button ReplyB = (Button)e.Item.FindControl("ReplyB");
        
        if (ReplyB!=null)
        {            ReplyB.Click += new EventHandler(ReplyB_Click);
        }     
    }    void ReplyB_Click(object sender, EventArgs e)
    {
        throw new NotImplementedException();
    }为什么点击出错 GuestBookDL1是一个DataList

Answer 1

DataList中按钮的事件可以这样用：html 页面代码：
<asp:DataList ID="DL_Select" runat="server" RepeatColumns="4" ShowFooter="False"
    ShowHeader="False" Width="100%" OnItemCommand="DL_Select_ItemCommand">
    <ItemTemplate>
        <asp:LinkButton ID="lbtnSelect" runat="server" Text='<%#Eval("name")%>' CommandName="SelectSchool"></asp:LinkButton>
    </ItemTemplate>
</asp:DataList>
注意设置 DataList 模板中 LinkButton 的CommandName 属性为 "SelectSchool"
CS 文件代码 
protected void DL_Select_ItemCommand(object source, DataListCommandEventArgs e)
 {
        //根据选择不同院系传递不同的值
     if (e.CommandName == "SelectSchool")
     {
            //code
     }
}

Answer 2

CommandName 的原理和我的一样 
我试过了 如果是在itembound中调用一样会出错

Answer 3

    protected void GuestBookDL1_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        int ArtId = Convert.ToInt32(DataBinder.Eval(e.Item.DataItem, "ArtId"));
        DataList GuestBookDL2 = (DataList)e.Item.FindControl("GuestBookDL2");
        if (GuestBookDL2!=null)
        {
            GuestBookDL2.DataSource = Article.GetDataTableRepley(ArtId);
            GuestBookDL2.ItemCommand += new DataListCommandEventHandler(GuestBookDL2_ItemCommand);
            GuestBookDL2.DataBind();      
        }
        TextBox ReplyT = (TextBox)e.Item.FindControl("ReplyT");
        Button ReplyB = (Button)e.Item.FindControl("ReplyB");
        
        //if (ReplyB!=null)
        //{        //    ReplyB.Click += new EventHandler(ReplyB_Click);
        //}     
    }    void GuestBookDL2_ItemCommand(object source, DataListCommandEventArgs e)
    {
        //throw new NotImplementedException();
        if (e.CommandName=="ReplyI")
        {
            Response.Write("XXX");
        }
    }

Answer 4

protected void GuestBookDL1_ItemDataBound(object sender, DataListItemEventArgs e)
{     if( e.Item.ItemType == ListItemType.Item || e.Item.ItemType ==ListItemType.AlternatingItem )
     {
        //你的代码
     }
}

Answer 5

同意 gdjlc 的代码~ 都已经回答正确了