Question

我正在尝试更改UpdatePanel中的div内容。

我写的代码成功更改了div，但只在第二个按钮点击，而不是在第一个按钮上。

就像UpdatePanel.Update（）一样，它没有刷新html。

请注意，所有内容（按钮和div）都在模态内。

这里是html部分：

   <div class="modal-body">
        <form name="frmInsOpe">
            <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true"></asp:ScriptManager>
            <asp:Button ID="btnInsOpe" Text="Button" OnClick="btnInsOpe_Click" runat="server" />
        </form>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
            <ContentTemplate>
                <div id="frameModal" runat="server"></div>
            </ContentTemplate>
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="btnInsOpe"/>
            </Triggers>
        </asp:UpdatePanel>
    </div>

和.cs

    protected void Page_Load(object sender, EventArgs e)
    {

    }

    private void Reload(string url)
    {
        string responseFromServer = String.Empty;

        try
        {
            string strBuffer = "";
            byte[] buffer = Encoding.ASCII.GetBytes(strBuffer);

            //Initialization
            HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create(url);
            //Our method is post, otherwise the buffer (postvars) would be useless

            WebReq.Method = "POST";
            //We use form contentType, for the postvars.
            WebReq.ContentType = "application/x-www-form-urlencoded";
            //The length of the buffer (postvars) is used as contentlength.
            WebReq.ContentLength = buffer.Length;

            //We open a stream for writing the postvars
            Stream PostData = WebReq.GetRequestStream();
            //Now we write, and afterwards, we close. Closing is always important!
            PostData.Write(buffer, 0, buffer.Length);
            PostData.Close();

            //Get the response handle, we have no true response yet!
            HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();

            //Now, we read the response (the string), and output it.
            Stream Answer = WebResp.GetResponseStream();

            // Open the stream using a StreamReader for easy access.
            StreamReader reader = new StreamReader(Answer);

            // Read the content.
            responseFromServer = reader.ReadToEnd();

            // Clean up the streams.
            reader.Close();
            Answer.Close();
            WebResp.Close();
        }
        catch(Exception ex)
        {
            responseFromServer = String.Format("<div><input type='text' value='Errore durante la richiesta: {0}' /></div>", ex.Message);
        }

        // Display the content.
        frameModal.Attributes["innerHtml"] = responseFromServer;
        UpdatePanel1.Update();
    }

    protected void btnInsOpe_Click(object sender, EventArgs e)
    { 
       Reload(ConfigurationManager.AppSettings["myUrl"]);
    }

有什么想法吗？

c＃ - 第二次按钮单击时UpdatePanel刷新

0 个答案: