wpf文件复制显示进度条效果

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        title="mainwindow" closed="window_closed" loaded="window_loaded"    resizemode="noresize">
    
        
            
            
            
        
        
                        
            
            
            
            
        
        
        
        
        
        
        
        
        
        
        
        
        
        
    

1 namespace wpfthreadtest
  2 {
  3     /// 

  4     /// mainwindow.xaml 的交互逻辑
  5     /// 

  6      public partial class mainwindow : window
  7     {
  8         thread timethread;
  9         thread copythread;
 10         public mainwindow()
 11         {
 12             initializecomponent();
 13             this.displaytimebythread.text = datetime.now.tolocaltime().tostring("yyyy年mm月dd日 hh:mm:ss"); ;
 14             timethread = new thread(new threadstart(dispatcherthread));
 15         }
 16         private void button3_click(object sender, routedeventargs e)
 17         {
 18             timethread.start();        
 19         }
 20         public void dispatcherthread()
 21         {
 22             //可以通过循环条件来控制ui的更新
 23              while (true)
 24             {
 25                 ///线程优先级，最长超时时间，方法委托（无参方法）
 26                  displaytimebythread.dispatcher.begininvoke(
 27                     dispatcherpriority.normal, new action(updatetime));
 28                 thread.sleep(1000);                
 29             }
 30         }
 31 
 32         
 33         private void updatetime()
 34         {
 35             this.displaytimebythread.text = datetime.now.tolocaltime().tostring("yyyy年mm月dd日 hh:mm:ss");      
 36         }
 37 
 38         private void window_closed(object sender, eventargs e)
 39         {
 40             ///关闭所有启动的线程
 41             timethread.abort();
 42             copythread.abort();
 43             application.current.shutdown();
 44         }
 45 
 46         private void button1_click(object sender, routedeventargs e)
 47         {
 48              ///设定要复制的文件全路径
 49             openfiledialog openfile = new openfiledialog();
 50             openfile.addextension = true;
 51             openfile.checkpathexists = true;
 52             openfile.filter = "*.rar|*.rar|all files|*.*";
 53             openfile.filterindex = 0;
 54             openfile.multiselect = false;
 55             bool? f=openfile.showdialog();
 56             if (f!=null && f.value)
 57             {
 58                 this.srcfile.text = openfile.filename;
 59             }
 60         }
 61 
 62         private void button2_click(object sender, routedeventargs e)
 63         {
 64             ///设定目标文件全路径
 65             savefiledialog savefile = new savefiledialog();
 66             savefile.addextension = true;
 67             savefile.filter = "*.rar|*.rar|all files|*.*";
 68             savefile.filterindex = 0;
 69             
 70             bool? f= savefile.showdialog();
 71             if (f != null && f.value)
 72             {
 73                 this.savefilepath.text = savefile.filename;
 74             }
 75         }
 76 
 77         private void button4_click(object sender, routedeventargs e)
 78         {
 79             string filename=this.srcfile.text.trim();
 80             string destpath=this.savefilepath.text.trim();
 81             if(!file.exists(filename))
 82             {
 83                 messagebox.show("源文件不存在");
 84                 return;
 85             }
 86 
 87             ///copy file and nodify ui that rate of progress of file copy          
 88             this.copyflag.text = "开始复制。。。";
 89 
 90             //设置进度条最大值，这句代码写的有点郁闷
 91             this.copyprogress.maximum = (new fileinfo(filename)).length;
 92 
 93             //保存复制文件信息，以进行传递
 94             copyfileinfo c = new copyfileinfo() { sourcepath = filename, destpath = destpath };
 95             //线程异步调用复制文件
 96             copythread = new thread(new parameterizedthreadstart(copyfile));           
 97             copythread.start(c);
 98 
 99             this.copyflag.text = "复制完成。。。";
100             
101             
102         }
103         /// 

104         /// 复制文件的委托方法
105         /// 

106         /// 复制文件的信息
107         private void copyfile(object obj)
108         {
109             copyfileinfo c = obj as copyfileinfo;
110             copyfile(c.sourcepath, c.destpath);
111         }
112         /// 

113         /// 复制文件
114         /// 

115         /// 
116         /// 
117         private void copyfile( string sourcepath,string destpath)
118         {
119             fileinfo f = new fileinfo(sourcepath);
120             filestream fsr = f.openread();
121             filestream fsw = file.create(destpath);
122             long filelength = f.length;
123             byte[] buffer = new byte[1024];
124             int n = 0;
125             
126             while (true)
127             {
128                 ///设定线程优先级
129                 ///异步调用updatecopyprogress方法
130                 ///并传递2个long类型参数filelength 与 fsr.position
131                 this.displaycopyinfo.dispatcher.begininvoke(dispatcherpriority.systemidle,
132                     new action(updatecopyprogress), filelength, fsr.position);
133                 
134                 //读写文件
135                 n=fsr.read(buffer, 0, 1024); 
136                 if (n==0)
137                 {
138                     break;
139                 }
140                 fsw.write(buffer, 0, n);
141                 fsw.flush();
142                 thread.sleep(1);
143             }
144             fsr.close();
145             fsw.close(); 
146         }
147 
148         private void updatecopyprogress(long filelength,long currentlength)
149         {
150             this.displaycopyinfo.text = string.format("总大小：{0},已复制:{1}", filelength, currentlength);
151             //刷新进度条            
152             this.copyprogress.value = currentlength;
153         }
154 
155         private void window_loaded(object sender, routedeventargs e)
156         {
157            
158         }
159          
160     }
161     public class copyfileinfo
162     {
163         public string sourcepath { get; set; }
164         public string destpath { get; set; }        
165     }
166 }