代碼如下：
private void button2_Click(object sender, RoutedEventArgs e)
{
Service1Client sc = new Service1Client();
sc.DoWorkCompleted += new EventHandler<DoWorkCompletedEventArgs>(sc_DoWorkCompleted);
sc.DoWorkAsync(textBox1.Text);
}
void sc_DoWorkCompleted(object sender, DoWorkCompletedEventArgs e)
{
textBox2.Text = e.Result;
}
若是你的調(diào)用非常復(fù)雜的話，比如當(dāng)這個(gè)調(diào)用完成的時(shí)候開始下一個(gè)調(diào)用，然后又進(jìn)行下一個(gè)調(diào)用，各個(gè)調(diào)用之間存在關(guān)聯(lián)關(guān)系的話，一直XX_DoWorkCompleted會讓你頭大，并且不利于代碼的管理。若碰到過這樣的問題的朋友一定很希望如果能夠同步調(diào)用就好了，這篇文章將幫到你。或者現(xiàn)在不需要，等你需要的時(shí)候記得用就行了，別像我當(dāng)初那樣難為的不行。
主要是需要引用一個(gè)類庫的問題，這個(gè)類庫是外國人寫的，名稱為DanielVaughan.dll,下載完之后，首先需要在項(xiàng)目中添加對它的引用，如下圖，
然后在程序中添加對兩個(gè)空間的引用，如下圖：
將原來的添加botton1事件：
private void button1_Click(object sender, RoutedEventArgs e)
{
string dd = textBox1.Text;
string res = "NULL";
ThreadPool.QueueUserWorkItem(delegate
{
Service1 sv = ChannelManager.Instance.GetChannel<Service1>();
/* Perform synchronous WCF call. */
res = SynchronousChannelBroker.PerformAction<string, string>(sv.BeginDoWork, sv.EndDoWork, dd);
Dispatcher.BeginInvoke(delegate
{
textBox2.Text +="/r/n同步調(diào)用--"+ res+"/r/n";
});
});
}
這樣就可以實(shí)現(xiàn)對WebClient的同步調(diào)用了，當(dāng)你需要關(guān)聯(lián)調(diào)用WebClient3次以上的時(shí)候 可以考慮使用這個(gè)類庫，如果只是簡單的調(diào)用下的話，沒有必要使用。
頁面全部代碼：
<UserControl x:Class="SilverlightApplication2.MainPage"
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"
d:DesignHeight="300" d:DesignWidth="400" xmlns:dataInput="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input" Width="640" Height="480">
<Grid x:Name="LayoutRoot">
<Grid.Background>
<LinearGradientBrush EndPoint="0.443,0.621" StartPoint="0.443,-2.509">
<GradientStop Color="#FF5C6768"/>
<GradientStop Color="White" Offset="1"/>
</LinearGradientBrush>
</Grid.Background>
<Button Content="同步調(diào)用服務(wù)" Height="40" HorizontalAlignment="Left" Margin="67,98,0,0" Name="button1" VerticalAlignment="Top" Width="120" Click="button1_Click" />
<dataInput:Label Height="50" HorizontalAlignment="Left" Margin="67,188,0,0" Name="label2" VerticalAlignment="Top" Width="46" Content="狀態(tài)：" FontSize="16" />
<TextBox Height="40" HorizontalAlignment="Left" Margin="165,27,0,0" Name="textBox1" VerticalAlignment="Top" Width="300" FontSize="16" />
<TextBox Height="100" HorizontalAlignment="Left" Margin="146,188,0,0" Name="textBox2" VerticalAlignment="Top" Width="400" FontSize="16" TextWrapping="Wrap" Text="尚未調(diào)用服務(wù)" />
<Button Content="異步調(diào)用服務(wù)" Height="40" HorizontalAlignment="Left" Margin="346,98,0,0" Name="button2" VerticalAlignment="Top" Width="120" Click="button2_Click" />
<dataInput:Label Height="40" HorizontalAlignment="Left" Margin="67,27,0,0" Name="label1" VerticalAlignment="Top" Width="92" FontSize="16" Content="輸入文本：" />
</Grid>
</UserControl>
處理程序全部代碼：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using SilverlightApplication2.ServiceReference1;
using System.Threading;
using DanielVaughan;
namespace SilverlightApplication2
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
UISynchronizationContext.Instance.Initialize(Dispatcher);
}
private void button1_Click(object sender, RoutedEventArgs e)
{
string dd = textBox1.Text;
string res = "NULL";
ThreadPool.QueueUserWorkItem(delegate
{
Service1 sv = ChannelManager.Instance.GetChannel<Service1>();
/* Perform synchronous WCF call. */
res = SynchronousChannelBroker.PerformAction<string, string>(sv.BeginDoWork, sv.EndDoWork, dd);
Dispatcher.BeginInvoke(delegate
{
textBox2.Text +="/r/n同步調(diào)用--"+ res+"/r/n";
});
});
}
private void button2_Click(object sender, RoutedEventArgs e)
{
Service1Client sc = new Service1Client();
sc.DoWorkCompleted += new EventHandler<DoWorkCompletedEventArgs>(sc_DoWorkCompleted);
sc.DoWorkAsync(textBox1.Text);
}
void sc_DoWorkCompleted(object sender, DoWorkCompletedEventArgs e)
{
textBox2.Text += "異步調(diào)用--" + e.Result + "/r/n";
}
}
}
Service代碼：
using System;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Activation;
namespace SilverlightApplication2.Web
{
[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class Service1
{
[OperationContract]
public string DoWork(string aa)
{
// 在此處添加操作實(shí)現(xiàn)
return "調(diào)用服務(wù)完成，返回你輸入的值:"+aa;
}
// 在此處添加更多操作并使用 [OperationContract] 標(biāo)記它們
}
}
程序運(yùn)行截圖：
1.
2.
3.
歡迎大家共同探討，覺得好的話請推薦下。本人技術(shù)水平有限，如有不足之處，還請園友多多批評指正，謝謝。
