Question

我想在每次点击按钮时弹出一条消息。此弹出窗口显示一些信息，并根据我的代码后置值更新其标签。

我尝试了不同的事情，例如声明变量 protected 或 public ：

Protected  test As string = "test"
'(...)
test = "another string"

在.aspx文件中：

<%=test%>

但后来我注意到我在服务器端控件（例如<%=%>）的属性中不能有<asp:Label>块。我试图在代码隐藏本身中设置.Text属性，它适用于页面加载，但我想动态地在另一个函数中设置.Text值。

Protected Sub Page_Load(object sender, EventArgs e)
    If Not Page.IsPostBack Then
       pagenumberLabel.Text = GetPagingCaptionString()
    End If
End Sub

我还尝试创建隐藏按钮并通过javascript执行点击，但未传递值。

[ASPx.VB]

Protected  fileName As string = ""

Protected Sub UpdatePopup(ByVal fileName As String)
        'fileName = "write my file name"
        ASPxLabelName.Text = fileName 
        ' this doens't work (filename="")
End Sub
' OR
Protected Sub UpdateButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles UpdateButton.Click
        fileName = "write my file name"
        ASPxLabelName.Text = fileName 
        ' This works but it is not dynamic as wanted
End Sub

[ASPX]

<dx:ASPxPopupControl ID="ASPxPopupControl1" runat="server" ClientInstanceName="ShowMessageInfo"
    CloseAction="CloseButton" CloseOnEscape="True" EnableViewState="False"
    PopupHorizontalAlign="WindowCenter" PopupVerticalAlign="WindowCenter"
    HeaderText="HEADER" AllowDragging="True" Modal="True"
    PopupAnimationType="Fade" PopupAction="None" Width="400px">
    <ContentCollection>
        <dx:PopupControlContentControl ID="PopupControlContentControl1" runat="server">
            <dx:ASPxPanel ID="Panel1" runat="server">
                <PanelCollection>
                    <dx:PanelContent ID="PanelContent1" runat="server">
                        <table cellspacing="0" cellpadding="5" width="100%">
                            <tr>
                                <td>Name:</td>
                                <td><dx:ASPxLabel ID="ASPxLabelName" runat="server" Text="">
                                    </dx:ASPxLabel></td>
                            </tr>
                        </table>
                        <dx:ASPxButton ID="UpdateButton" runat="server" Text="Update Content"
                            style="display:none" AutoPostBack="False">
                            <ClientSideEvents Click="function(s, e) { ShowMessageInfo.PerformCallback(); }" />
                        </dx:ASPxButton>
                    </dx:PanelContent>
                </PanelCollection>
            </dx:ASPxPanel>
        </dx:PopupControlContentControl>
    </ContentCollection>
</dx:ASPxPopupControl>

如何从代码隐藏值更新asp.net中的label.text

0 个答案: