asp.net – 从ItemDataBound事件中的转发器控件中获取值

发布时间：2020-12-16 07:31:37 所属栏目：asp.Net 来源：网络整理

导读：如何在ItemDataBound事件中获取转发器控件的值我写了以下asp代码 asp:Repeater ID="repeaterItems" runat="server" OnItemDataBound="rptData_ItemDataBound" itemtemplate tr td style="font-family:Tahoma; font-size:small"asp:Label id="content" runat

如何在ItemDataBound事件中获取转发器控件的值
我写了以下asp代码

<asp:Repeater ID="repeaterItems" runat="server" OnItemDataBound="rptData_ItemDataBound"  >
        <itemtemplate>
                        <tr>
                            <td  style="font-family:Tahoma; font-size:small"><asp:Label id="content" runat="server">&nbsp;&nbsp;<%#DataBinder.Eval(Container.DataItem,"cont")%></asp:Label></td>

                        </tr>

                        <tr><td  style="font-family:Verdana; font-size:small"><asp:Label id="url" runat="server"><a style="color:Green" href="<%#DataBinder.Eval(Container.DataItem,"url")%>" target="_blank"><%#DataBinder.Eval(Container.DataItem,"url")%></a></asp:Label></td></tr>
                    <tr><td><asp:LinkButton runat="server" ID="glossary" >Glossary</asp:LinkButton></td></tr>
                    <tr><td><asp:HiddenField runat="server" ID="id1"/><%#DataBinder.Eval(Container.DataItem,"id")%></td></tr>
                    <tr><td></td></tr><tr><td></td></tr><tr><td></td></tr>
                    </itemtemplate>
        </asp:Repeater>

和vb.net中的ItemDataBound事件

Protected Sub rptData_ItemDataBound(ByVal source As Object,ByVal e As RepeaterItemEventArgs)

        Dim content As String = ""
        Dim url As String = ""
        Dim lbl1 As Label = TryCast(e.Item.FindControl("content"),Label)
        Dim lbl2 As Label = TryCast(e.Item.FindControl("url"),Label)
        content = lbl1.Text
        url = lbl2.Text
        Dim btn As LinkButton = CType(e.Item.FindControl("glossary"),LinkButton)

        btn.PostBackUrl = "glossary.aspx?cont=" + content + "&url=" + url
end sub

但我在内容和网址上得到空值……
请帮忙

解决方法

首先在标记中使用标签的Text属性,不要将databinder.Eval放入

<asp:Label ..> do not put content here </asp:Label>

在项目数据绑定事件中,首先找出控件在哪个模板中.

按照这个例子：

标记：

<asp:Repeater ID="Repeater1" runat="server" 
                    onitemdatabound="Repeater1_ItemDataBound">                
                <HeaderTemplate>
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Eval("content") %>'></asp:Label>
                    <asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>
                </ItemTemplate>
                <AlternatingItemTemplate></AlternatingItemTemplate>
                <SeparatorTemplate></SeparatorTemplate>
            </asp:Repeater>

源代码：

C#：

protected void Repeater1_ItemDataBound(object sender,RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item)
        {
            Label lbl = (Label)e.Item.FindControl("Label1");
            LinkButton link = (LinkButton)e.Item.FindControl("LinkButton1");
            link.PostBackUrl = "abcd/" + lbl.Text;
        }
    }

VB.Net：

Protected Sub Repeater1_ItemDataBound(sender As Object,e As RepeaterItemEventArgs)
    If e.Item.ItemType = ListItemType.Item Then
        Dim lbl As Label = DirectCast(e.Item.FindControl("Label1"),Label)
        Dim link As LinkButton = DirectCast(e.Item.FindControl("LinkButton1"),LinkButton)
        link.PostBackUrl = "abcd/" + lbl.Text
    End If
End Sub

（编辑：李大同）

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