Question

我如何在asp.net.i中使用request.querystring有一个linkbutton，这是在转发器控件中。我想播放相应链接的视频_click.i想要将相应链接的fileID传递给功能，我该怎么做？

<asp:Repeater ID="Repeater2" runat="server">
    <ItemTemplate>
        <asp:LinkButton runat="server" ID="LnkBtn" 
                OnClick="ButtonShowVideo_Click"><%#Eval("FileName")%>
        </asp:LinkButton>
    </ItemTemplate>
</asp:Repeater>


Protected Sub ButtonShowVideo_Click(ByVal sender As System.Object, 
                   ByVal e As System.EventArgs) Handles ButtonShowVideo.Click
    Repeater1.DataSource = GetSpecificVideo(**here i want to get the fileID**)
    Repeater1.DataBind()
End Sub

Private Function GetSpecificVideo(ByVal i As Object) As DataTable
    'pass the id of the video
    Dim connectionString As String = ConfigurationManager
                 .ConnectionStrings("UploadConnectionString").ConnectionString
    Dim adapter As New SqlDataAdapter("SELECT FileName, FileID,FilePath " + 
             "FROM FileM WHERE FileID = @FileID", connectionString)
        adapter.SelectCommand.Parameters.Add("@FileID", SqlDbType.Int).Value = 
                            DirectCast(i,Integer)
    Dim table As New DataTable()
    adapter.Fill(table)
    Return table
End Function

Answer 1

这对你没有帮助：

<asp:Repeater ID="Repeater2" runat="server">
    <ItemTemplate>
        <asp:LinkButton runat="server" ID="LnkBtn" 
                OnClick="ButtonShowVideo_Click"><%#Eval("FileName")%>
        </asp:LinkButton>
    </ItemTemplate>
</asp:Repeater>

因为它不会将FileName放入查询stirng中。而是使用这种方法：

<asp:Repeater ID="Repeater2" runat="server">
    <ItemTemplate>
        <asp:LinkButton runat="server" ID="LnkBtn" 
            CommandArgument='<%#Eval("FileName")%>'
            OnClick="ButtonShowVideo_Click"><%#Eval("FileName")%>
        </asp:LinkButton>
    </ItemTemplate>
</asp:Repeater>

在代码背后：

Protected Sub ButtonShowVideo_Click(ByVal sender As System.Object, 
       ByVal e As System.EventArgs) Handles ButtonShowVideo.Click

    Dim  btn as LinkButton = sender as LinkButton

    if(btn is not null) then
        if(NOT string.IsNullOrEmpty(btn.CommandArgument)) then
                dim vid as integer = Convert.ToInt32(btn.CommandArgument)
                Repeater1.DataSource = GetSpecificVideo(vid)
                Repeater1.DataBind()
        end if
    end if
End Sub

Answer 2

如果您打算使用查询字符串，则单击按钮可以执行以下任一操作：

指向具有指定的quertstring的页面的超链接，以标识操作/实体等
如上面第1项中所述，将服务器端重定向到页面

那么你发现哪些问题具有挑战性？

的Request.QueryString

2 个答案: