ASP.NET上载文件控件和显示等待消息

我已经在互联网上搜索过，尝试过不同的方法，但我真的很难做到这一点。我会接受任何帮助，包括第三方组件、javascript和一切。。。 我的问题（我想）是我没有使用上传按钮，而是使用了一个保存数据表单的按钮。 标记：

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谢谢大家

如果我理解正确，您希望在上传文件时显示“等待”消息

您可以使用javascript实现这一点：

<asp:Button runat="server" CssClass="gbutton" ID="btnConfermaIns" Text="Conferma" OnClick="btnConfermaIns_Click" UseSubmitBehavior="false" OnClientClick="showWaitingMessage()" />
<div id="waitMessage" style="display: none;">Please wait...</div>
<script>
     function showWaitingMessage() {
          document.getElementById("waitMessage").style.display = "block";
     }
</script>

请稍候。。。
函数showWaitingMessage（）{
document.getElementById（“waitMessage”）.style.display=“block”；
}

太简单了！除了这个，我什么都试过了！非常感谢。

Function Upload()
        Dim file As String = ""
        If MyFileUpload.HasFile Then
            If MyFileUpload.PostedFile.ContentLength <= 15000000 Then

                'throbber.Style("display") = "normal"
                Dim path As String = My.Settings.pathUpload1 & rfCliente & My.Settings.pathUpload2
                If Not Directory.Exists(path) Then
                    'If Directory (Folder) does not exists. Create it.
                    Directory.CreateDirectory(path)
                End If

                file = path & MyFileUpload.FileName

                MyFileUpload.SaveAs(file)
                hdnNomeFile.Value = file
                ClientScript.RegisterStartupScript(Me.GetType(), "Scriptkey", String.Format("alert('{0}');", "File caricato: " & MyFileUpload.FileName), True)

                If MyFileUpload.FileName.Contains(".txt") Then
                    Dim srRead As New System.IO.StreamReader(file)
                    Dim strFileText As String = ""
                    strFileText = srRead.ReadToEnd
                    srRead.Close()
                    txtNota.Text = strFileText
                    txtTitolo.Text = MyFileUpload.FileName
                End If
                Return True
            Else
                hdnNomeFile.Value = ""
                ClientScript.RegisterStartupScript(Me.GetType(), "Scriptkey", String.Format("alert('{0}');", "Errore nel caricamento"), True)
                Return False
            End If
            'throbber.Style("display") = "none"

        Else
            ClientScript.RegisterStartupScript(Me.GetType(), "Scriptkey", String.Format("alert('{0}');", "Il file supera le dimensioni massime consentite (15mb)"), True)
            Return False
        End If
    End Function

If MyFileUpload.HasFile Then
                If Upload() Then
                    inserimentoNota()
                Else
                    ClientScript.RegisterStartupScript(Me.GetType(), "Scriptkey", String.Format("alert('{0}');", "Errore nel caricamento"), True)
                End If
            Else
                inserimentoNota()
            End If

<asp:Button runat="server" CssClass="gbutton" ID="btnConfermaIns" Text="Conferma" OnClick="btnConfermaIns_Click" UseSubmitBehavior="false" OnClientClick="showWaitingMessage()" />
<div id="waitMessage" style="display: none;">Please wait...</div>
<script>
     function showWaitingMessage() {
          document.getElementById("waitMessage").style.display = "block";
     }
</script>