C# winform 不知道最大值的进度条

[大潘_IT]

我要拷贝一个文件夹覆盖另一个文件夹，在这个过程中我需要这样的进度条，请教高手！

[Dobzhansky]

这是个进度条?

[IE11下面经常卡到爆]

private void initializecomponent() 
{
// 
// progressbar1 
// 
this.progressbar1.location = new system.drawing.point(8, 16); 
this.progressbar1.name = "progressbar1"; 
this.progressbar1.size = new system.drawing.size(208, 16); 
this.progressbar1.tabindex = 0; 
...
}

int totalsize; //total size 
int position; //position 
const int buffer_size = 4096; 
byte[] buffer; 
stream stream; 

private void btncopy_click(object sender, system.eventargs e) 
{ 
string strfile = ""; 

openfiledialog dlg = new openfiledialog(); 
if ( dlg.showdialog() == dialogresult.ok ) 
{ 
strfile = dlg.filename ; 
} 
else 
{ 
return ; 
} 

filestream fs = new filestream( strfile , filemode.open , fileaccess.read ) ; 
totalsize = (int)fs.length ; 
stream = fs; 

//delete file which aready exists. 
if ( file.exists( "c:\\copyedfile.bin" ) ) 
file.delete( "c:\\copyedfile.bin" ); 

//copy file while larger than 4kb. 
if ( totalsize > buffer_size ) 
{ 
buffer = new byte[ buffer_size ]; 

// async invoke 
stream.beginread( buffer , 0 , buffer_size , new asynccallback( asynccopyfile ) , null ); 
} 
else 
{ 
fs.close(); 
} 

} 

/// <summary> 
/// asynchronously copy file 
/// </summary> 
/// <param name="ar"></param> 
private void asynccopyfile( iasyncresult ar ) 
{ 
int readedlength ; 

// lock filestream 
lock( stream ) 
{ 
readedlength = stream.endread( ar ); // when stream endread, get readed length 
} 

// write to disk 
filestream fswriter = new filestream( "c:\\copyedfile.bin" , filemode.append , fileaccess.write ); 
fswriter.write( buffer , 0 , buffer.length ); 
fswriter.close(); 

// current stream position 
position += readedlength; 

// response ui 
methodinvoker m = new methodinvoker( synchprogressbar ); 
m.begininvoke( null , null ); 

if ( position >= totalsize ) // read over. 
{ 
stream.close(); //close filestream 
return ; 
} 

// continue to read and write 
lock ( stream ) 
{ 
int leftsize = totalsize - position; 

if ( leftsize < buffer_size ) 
buffer = new byte[ leftsize ]; 

stream.beginread( buffer , 0 , buffer.length , new asynccallback( asynccopyfile ) , null ); 

} 
} 

private void synchprogressbar() 
{ 
this.progressbar1.maximum = totalsize; 
this.progressbar1.value = position ; 
}

[IE11下面经常卡到爆]

拷贝文件夹可以遍历统计出大小

public   long   GetDirectoryLength(string   dirPath){ 
if(!Directory.Exists(dirPath)) 
return   0; 
long   len=0; 
DirectoryInfo   di=new   DirectoryInfo(dirPath); 
foreach(FileInfo   fi   in   di.GetFiles()){ 
len+=fi.Length; 
} 
DirectoryInfo[]   dis=di.GetDirectories(); 
if(dis.Length> 0){ 
for(int   i=0;i <dis.Length;i++){ 
len+=GetDirectoryLength(dis[i].FullName); 
} 
} 
return   len; 
} 

[火柴没帽]

判断文件夹内文件总数，根据拷贝完成的文件数量确定进度吧，不可能太精确

[纯唇Yu弄]

[Quote=引用 3 楼 dongxinxi 的回复:]

拷贝文件夹可以遍历统计出大小
C# code

public long GetDirectoryLength(string dirPath){
if(!Directory.Exists(dirPath))
return 0;
long len=0;
DirectoryInfo di=new DirectoryInfo(dirPath);
foreach(……
[/Quote]

[hanzhehanzhe]

神奇的QQ空间