asp.net - 从后面的代码访问listview itemtemplate

我希望动态更改ListView的ItemTemplate中的列数：

<asp:ListView runat="server" ID="ReportListView" DataSourceID="ReportListViewSDS">
 <LayoutTemplate>
   <table>
       <tr>
           <asp:PlaceHolder runat="server" ID="itemPlaceHolder" />
       </tr>
   </table>
 </LayoutTemplate>
 <ItemTemplate>
       <!-- need to dynamically create the number of columns in the code behind
            based on the select statement in the SelectCommand -->
 </ItemTemplate>
</asp:ListView>

然后在后面的代码中，我得到了：

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    ' Based on The Request.Form variables sent, the SQL command will
    ' select x number of columns:
    ' SqlStatement = "SELECT " for each Request.Form values " FROM staff"
    '      example: "SELECT Fname, Lname, email, phone FROM staff"
    ' Run sql command.

    ' that all works, the question now is how do i change the ItemTemplate
    ' so that it has the correct number of columns.  Something like this: (pseudo code)
    For each row found in sql command
       ReportListView.ItemTemplate.Add( "<tr>" )
       For each Request.Form as i
            ReportLIstView.ItemTemplate.Add( "<td>" & sqlresult(i) & "</td>" )
       Next
       ReportListView.ItemTemplate.Add( "</tr>" )
    Next
 End Sub

也许还有另一种解决方法，但这是到目前为止的唯一想法。 asp.net新手，任何建议，非常欢迎！谢谢！

最佳答案

我认为您将不得不做一些不同的事情。尝试这样的事情：

<table>
    <asp:ListView ID="ListView1" runat="server">
        <ItemTemplate>
            <tr>
               <asp:PlaceHolder Id="PlaceHolder1" runat="server" />
            </tr>
        </ItemTemplate>
    </asp:ListView>
</table>

语法可能并不完美，但是请尝试在您的代码后面执行以下操作：

For Each listItem As ListViewDataItem In ListView1.Items
    Dim plc As PlaceHolder = DirectCast(listItem.FindControl("PlaceHolder1"), PlaceHolder)
    If plc IsNot Nothing Then
        For Each item As String In Request.Form
            plc.Controls.Add(New Literal(String.Format("<td>{0}</td>", item)))
        Next
    End If
Next

关于asp.net - 从后面的代码访问listview itemtemplate，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7286949/