Silverlight中 非UI线程更新UI 的几种方法

转自 http://m.cnblogs.com/20267/1420156.html?full=1

Silverlight中 非UI线程更新UI 的几种方法:Delegate, AsyncOperation,BackgroundWorker
首先列一下基础代码:

<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
x:Class="Shareach.TestUI.UCThreadUpdate"
d:DesignWidth="250" d:DesignHeight="120">
<StackPanel>
<TextBlock x:Name="txtCalc" />
</StackPanel>
</UserControl>
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Threading;
namespace Shareach.TestUI
{
public partial class UCThreadUpdate: UserControl
{
public UCMsgSend()
{
InitializeComponent();
ThreadUpdate();
}
void ThreadUpdate()
{
Thread thread = new Thread(new ThreadStart(DoWork));
thread.Start();
}
void DoWork()
{
int i=0;
while(i<100){
DoShow(i);
}
}
}
}
DoShow的三种写法
1. delegate

void DoShow(i){
this.Dispatcher.BeginInvoke(
delegate {
txtCalc.Text = string.format(“result “{0}”,i);
});
}
2.AsyncOperation

void DoShow(i){
//这个可以写成成员变量,我这里只是为了好区分
System.ComponentModel.AsyncOperation asyncOper = System.ComponentModel.AsyncOperationManager.CreateOperation(null);
asyncOper.Post(result =>
{
txtCalc.Text = string.format(“result “{0}”,i);
}, null);
}
3.BackgroundWorker

参考MSDN上的文章的
Winform 也一样,