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盲目学习。。。 发表于 2012-12-10 14:07:05

在 WPF中使用 BackgroundWorker

<div id="cnblogs_post_body">http://pic002.cnblogs.com/images/2012/315059/2012081615092818.jpg
XAML：
<Window x:Class="WPFClientWCF.MainWindow"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      Title="MainWindow" Height="430" Width="863">
    <Grid>
      <Button Content="Start" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_1"/>
      <DataGrid HorizontalAlignment="Left" Name="dataGridControl" Margin="0,69,0,0" VerticalAlignment="Top" Height="313" Width="847"/>
      <ProgressBar HorizontalAlignment="Left" Height="22" Margin="99,10,0,0" Name="progressbar1" VerticalAlignment="Top" Width="567"/>
      <Label Content="0" HorizontalAlignment="Left" Margin="685,10,0,0" Name="txtLab" VerticalAlignment="Top" RenderTransformOrigin="0.4,0.115"/>
      <Label Content="" HorizontalAlignment="Left" Name="txtLabCount" Margin="10,38,0,0" VerticalAlignment="Top"/>
    </Grid>
</Window>
Window.CS
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Forms;
namespace WPFClientWCF
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
      List<ServiceReferenceQuery.DCPersonLoc> listInfo;
      System.ComponentModel.BackgroundWorker backgroundWorker1;
      public MainWindow()
      {
            InitializeComponent();
            backgroundWorker1 = new System.ComponentModel.BackgroundWorker();
            progressbar1.Maximum = 100;
            backgroundWorker1.WorkerReportsProgress = true;
            backgroundWorker1.WorkerSupportsCancellation = true;
            backgroundWorker1.ProgressChanged += backgroundWorker1_ProgressChanged;
            backgroundWorker1.RunWorkerCompleted += backgroundWorker1_RunWorkerCompleted;
            backgroundWorker1.DoWork += backgroundWorker1_DoWork;
                }
      void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
      {
            DoWork(backgroundWorker1);
      }
      private void DoWork(System.ComponentModel.BackgroundWorker bk)
      {
            listInfo = new List<ServiceReferenceQuery.DCPersonLoc>();
            ServiceReferenceQuery.ServiceGeneralQueryClient query = new ServiceReferenceQuery.ServiceGeneralQueryClient();
            for (int i = 0; i <= 100; i++)
            {
                if (bk.CancellationPending)
                {
                  return;
                }
             listInfo=query.GetPathPersonLoc("F00015", DateTime.Now.AddHours(-5), DateTime.Now, 1);
             bk.ReportProgress(i,string.Format("当前正在查询进度：{0} %",i));
            }
      }
      void backgroundWorker1_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e)
      {
            if (e.Error == null)
            {
                System.Windows.MessageBox.Show("OK");
                dataGridControl.ItemsSource = listInfo;
                txtLabCount.Content ="查到数据："+ listInfo.Count.ToString();
            }
            else if (e.Error != null)
            {
                System.Windows.MessageBox.Show(e.Error.ToString());
            }
      }
      void backgroundWorker1_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e)
      {
            progressbar1.Value = e.ProgressPercentage;
            txtLab.Content = e.UserState.ToString();
      }
      private void Button_Click_1(object sender, RoutedEventArgs e)
      {
            if (backgroundWorker1.IsBusy)
            {
                return;
            }
            backgroundWorker1.RunWorkerAsync();
      }
    }
}

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