WebPart.RenderWorkItemTimeout 方法

请注意：此 API 现在已过时。

将 Web 部件中的 HTML 呈现时的工作项已超时。

命名空间：  Microsoft.SharePoint.WebPartPages
程序集：  Microsoft.SharePoint（位于 Microsoft.SharePoint.dll 中）

语法

声明
<ObsoleteAttribute("Use Page.RegisterAsyncTask instead.")> _
Protected Overridable Sub RenderWorkItemTimeout ( _
    writer As HtmlTextWriter _
)
用法
Dim writer As HtmlTextWriter

Me.RenderWorkItemTimeout(writer)

[ObsoleteAttribute("Use Page.RegisterAsyncTask instead.")]
protected virtual void RenderWorkItemTimeout(
    HtmlTextWriter writer
)

参数

• writer
  类型：System.Web.UI.HtmlTextWriter

  定义要呈现的工作项超时时的输出HtmlTextWriter对象。

备注

如果 Web 部件不重写RenderWorkItemTimeout方法，则呈现默认系统错误消息。< WebPartWorkItem > 标记包含在 web.config 文件中的 < SharePoint > 标记中的超时属性的值由指定的超时设置。

示例

下面的代码示例演示如何重写RenderWorkItemTimeout方法。

Imports System
Imports System.Web.UI
Imports System.Threading
Imports System.Xml.Serialization
Imports Microsoft.SharePoint
Imports Microsoft.SharePoint.WebPartPages

Public Class WorkItemSample
    Inherits Microsoft.SharePoint.WebPartPages.WebPart
    Private log As String = ""
    Private mre As New ManualResetEvent(False)

    Public Sub New()
        AddHandler Me.PreRender, AddressOf CreateThread
    End Sub

    Private Sub CreateThread(o As Object, e As EventArgs)
        RegisterWorkItemCallback(AddressOf DoWork, Nothing)
    End Sub

    ' Sleep for 4 seconds to simulate doing work
    Private Sub DoWork(o As Object)
        Thread.Sleep(4000)
        log += "hello from the thread pool!<BR>"
        mre.Set()
    End Sub

    Protected Overrides Sub RenderWebPart(output As HtmlTextWriter)
        output.Write(log)
    End Sub

    Protected Overrides Sub RenderWorkItemTimeout(output As HtmlTextWriter)
        output.Write("Timed out")
    End Sub
End Class

using System;
using System.Web.UI;
using System.Threading;
using System.Xml.Serialization;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebPartPages;

namespace ExampleWebParts
{
    public class WorkItemSample : Microsoft.SharePoint.WebPartPages.WebPart
    {
        string log="";
        ManualResetEvent mre = new ManualResetEvent(false);

        public WorkItemSample()
        {
            this.PreRender+=new EventHandler(CreateThread);
        }

         private void CreateThread(object o, EventArgs e)
        {
            RegisterWorkItemCallback(new WaitCallback(DoWork), null);
        }

        // Sleep for 4 seconds to simulate doing work
        private void DoWork(object o)
        {
            Thread.Sleep(4000);
            log+="hello from the thread pool!<BR>";
            mre.Set();
        }

        protected override void RenderWebPart(HtmlTextWriter output)
        {
            output.Write(log);
        }

        protected override void RenderWorkItemTimeout(HtmlTextWriter output)
        {
            output.Write ("Timed out");
        }
    }
}

另请参阅

引用

WebPart 类

WebPart 成员

Microsoft.SharePoint.WebPartPages 命名空间