Question

我正在打开Telerik RadWindowManager弹出窗口。要执行的数据库操作很长。在装载期间，即大约35-40秒，暂时，我一直等到这个过程结束。

有没有办法首先加载设计并显示Loader /进度条以通知用户等待......实际上当Internet速度很慢时问题会变得更糟......

任何建议....

Answer 1

这里有一个很好的例子。有关演示，请参阅here。

aspx文件：

<telerik:RadScriptManager id="ScriptManager1" runat="server" />

 <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" OnAjaxRequest="RadAjaxManager1_AjaxRequest"/>
 <p>
   Press the submit button in order to start monitoring custom progress
 </p>
 <asp:button ID="buttonSubmit" runat="server" Text="Submit" OnClick="buttonSubmit_Click" CssClass="RadUploadButton" />

 <telerik:RadProgressManager id="Radprogressmanager1" runat="server" />

 <telerik:RadProgressArea id="RadProgressArea1" runat="server" />

aspx.cs文件：

    protected void Page_Load(object sender, System.EventArgs e)
    {
        if (!IsPostBack)
        {
            //Do not display SelectedFilesCount progress indicator.
            RadProgressArea1.ProgressIndicators &= ~ProgressIndicators.SelectedFilesCount;
        }

        RadProgressArea1.Localization.Uploaded = "Total Progress";
        RadProgressArea1.Localization.UploadedFiles = "Progress";
        RadProgressArea1.Localization.CurrentFileName = "Custom progress in action: ";
    }

    protected void buttonSubmit_Click(object sender, System.EventArgs e)
    {
        UpdateProgressContext();
    }

    private void UpdateProgressContext()
    {
        const int total = 100;

        RadProgressContext progress = RadProgressContext.Current;
        progress.Speed = "N/A";

        for (int i = 0; i < total; i++)
        {
            progress.PrimaryTotal = 1;
            progress.PrimaryValue = 1;
            progress.PrimaryPercent = 100;

            progress.SecondaryTotal = total;
            progress.SecondaryValue = i;
            progress.SecondaryPercent = i;

            progress.CurrentOperationText = "Step " + i.ToString();

            if (!Response.IsClientConnected)
            {
                //Cancel button was clicked or the browser was closed, so stop processing
                break;
            }

            progress.TimeEstimated = (total - i) * 100;
            //Stall the current thread for 0.1 seconds
            System.Threading.Thread.Sleep(100);
        }
    }

现在集成代码应该更容易。

编辑：要在PageLoad中设置RadProgressArea之后触发数据库操作，您需要在第一次页面加载后进行一些ajax调用（所以我刚刚将RadAjaxManager添加到ascx文件upper）。使用此代码触发DataBase调用：

的javascript：

 function pageLoad(sender, eventArgs) {
     if (!eventArgs.get_isPartialLoad()) {
         $find("<%= RadAjaxManager1.ClientID %>").ajaxRequest("StartDBOperation");
     }
 }

ascx.cs文件：

    protected void RadAjaxManager1_AjaxRequest(object sender, Telerik.Web.UI.AjaxRequestEventArgs e)
    {
        if (e.Argument == "StartDBOperation")
        {
            // Start DB operation here..
        }
    }

Answer 2

下面还有一个替代方案......但不是解决方案

我可以在内容加载时按如下方式显示加载面板

Mark Up

<div id="loading" style=" width: 100px; height: 50px; display: none; 
                                              text-align: center; margin: auto;">
    loading...
</div>
<asp:Button ID="RadButton1" runat="server" 
                 Text="RadButton1" OnClientClick="openRadWnd(); return false;" />
<telerik:RadWindowManager ID="RadWindowManager1" runat="server">
   <Windows>
      <telerik:RadWindow ID="RadWindow1" runat="server" 
               NavigateUrl="url" ShowContentDuringLoad="false"
               OnClientShow="OnClientShow" OnClientPageLoad="OnClientPageLoad">
      </telerik:RadWindow>
   </Windows>
</telerik:RadWindowManager>

的JavaScript

<script type="text/javascript">
    var loadingSign = null;
    var contentCell = null;
    function openRadWnd() {
        $find("<%=RadWindow1.ClientID %>").show();
    }
    function OnClientShow(sender, args) {
        loadingSign = $get("loading");
        contentCell = sender._contentCell;
        if (contentCell && loadingSign) {
            contentCell.appendChild(loadingSign);
            contentCell.style.verticalAlign = "middle";
            loadingSign.style.display = "";
        }
    }
    function OnClientPageLoad(sender, args) {
        if (contentCell && loadingSign) {
            contentCell.removeChild(loadingSign);
            contentCell.style.verticalAlign = "";
            loadingSign.style.display = "none";
        }
    }
</script>

Answer 3

在客户端上使用JavaScript打开RadWindow，通过JavaScript设置所需的URL。执行不部署RadWindow的部分回发。如果仅在服务器上获取URL - 使用相同的逻辑，但最初显示加载符号，当响应完成时调用脚本再次更改RadWIndow的URL。 http://www.telerik.com/help/aspnet-ajax/window-programming-opening.html http://www.telerik.com/help/aspnet-ajax/window-troubleshooting-javascript-from-server-side.html http://www.telerik.com/help/aspnet-ajax/window-programming-radwindow-methods.html

如何异步打开Telerik Rad Pop Up窗口？

3 个答案:

Mark Up

的JavaScript