C# 在ASP.NET中的更新面板内，手风琴窗格内的按钮未启动

我正在自定义一个网站，但在更新面板中使用触发器时，单击事件没有触发

<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="True"

另请参见触发器

另请参见按钮点击背后的代码：-

protected void btnDownLoads_Click(object sender, EventArgs e)
    {
        string wdr = "dR";
        string value = txtDate.Text;
        string str = wdr + value;
        string foldername = "Daily";
        string filename = str + ".pdf";
        var filePath = Path.Combine(@"D:\REPORTS\" + foldername + " ", filename);
        if (File.Exists(filePath))
        {
            Response.ContentType = @"application/pdf";
            Response.AddHeader(
            @"Content-Disposition",
            @"attachment; filename=" + Path.GetFileName(filePath));
            Response.WriteFile(filePath);
            Response.End();
        }
        else
        {
            Response.Write("<script>alert('No report uploaded for this date')</script>");
        }
    }

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很久以前我也遇到过同样的问题

尝试删除.aspx页面上的

触发器

，并在页面上添加（注册控件）如下所示的代码\u加载到外部！page.isPostback{}）

---

查看它是否工作

您的意思是在按钮单击事件之后文件没有传输到客户端？？？@Mr。香港人: 是的，单击按钮时没有任何事情发生。由于更新面板停止了文件传输到客户端，请尝试删除更新面板，看看它是否工作。@Mr。香港人: 我试过了，但仍然没有发生任何事情。然后尝试response.transmitfile而不是WriteFile

protected void btnDownLoads_Click(object sender, EventArgs e)
    {
        string wdr = "dR";
        string value = txtDate.Text;
        string str = wdr + value;
        string foldername = "Daily";
        string filename = str + ".pdf";
        var filePath = Path.Combine(@"D:\REPORTS\" + foldername + " ", filename);
        if (File.Exists(filePath))
        {
            Response.ContentType = @"application/pdf";
            Response.AddHeader(
            @"Content-Disposition",
            @"attachment; filename=" + Path.GetFileName(filePath));
            Response.WriteFile(filePath);
            Response.End();
        }
        else
        {
            Response.Write("<script>alert('No report uploaded for this date')</script>");
        }
    }

try
    {
        this.SmartNavigation = true;
        if (this.IsPostBack == false)
        {
            //FillReport();
            txtDate.Text = DateTime.Now.ToString("dd-MM-yyyy");
            cal.Visible = false;
            currentdate.Text = DateTime.Now.Date.ToLongDateString();

            #region edited 
            #region download click

            checkdailydata();

            #endregion
            #endregion
        }
    }
    catch (Exception ext) // Edited Jimit included try catch
    {
        CreateLogFiles ls = new CreateLogFiles();
        ls.ErrorLog(Server.MapPath(@"~\ErrorLog\ErrorMsg"), ext.Message);
    }

ScriptManager.GetCurrent(this.Page).RegisterPostBackControl(btnDownLoads);