C # download with progress bar code (normal progress bar)

<span style= "FONT-SIZE:14PX;" > </span><pre name= "code" class= "CSharp" ><span style= "FONT-SIZE:14PX;" >//<summary>//download with progress bar code (normal progress bar)///</summary>//<param name= "UR L "> URL </param>//<param name=" filename "> after download file name </param>//<param name=" Prog "& GT; Report progress processing (first parameter: Total size, second parameter: current progress) </param>//<returns>true/false Download Success </returns> Publi            C static BOOL DownLoadFile (string URL, String Filename, Action<int, int> updateprogress = null) {            Stream st = null;             Stream so = null;             System.Net.HttpWebRequest MYRQ =null;            System.Net.HttpWebResponse MYRP = null;            BOOL flag = FALSE;                      try {Myrq = (System.Net.HttpWebRequest) System.Net.HttpWebRequest.Create (URL);//Get a Web request from the URL address MYRP = (System.Net.HttpWebResponse) myrq.getresponse ();Get Web response from Web request long totalbytes = Myrp. ContentLength; Total bytes received from Web Response//Update progress if (updateprogress! = null) {update Progress (int) totalbytes,0);//The maximum value of the progress bar is obtained from the total number of bytes} st = Myrp. GetResponseStream (); Create stream from Web request (read) so = new System.IO.FileStream (Filename, System.IO.FileMode.Create); Create file stream (write) long totaldownloadedbyte = 0;                Download file size byte[] by = new byte[1024]; int osize = St. Read (by, 0, (int.) by. Length); Read stream while (Osize > 0) {totaldownloadedbyte = osize + totaldownl Oadedbyte;                    Update file size application.doevents (); So. Write (by, 0, osize);                        Write stream//update progress if (updateprogress! = null) { UpdateProgress ((int) totalbytes, (int) TotaldownloadedbyTE);//Update progress bar} osize = St. Read (by, 0, (int.) by. Length);                    Read Stream}//Update progress if (updateprogress! = null) {                UpdateProgress ((int) totalbytes, (int) totalbytes);            } flag= true;                } catch (Exception) {flag = false;                Throw            return false; } finally {if (MYRQ! = null) {Myrq.abort ();//Destroy Off Connect} if (MYRP! = null) {MYRP. Close ();//Destroy Close response} if (so! = null) {so. Close (); Close Stream} if (st! = null) {St. Close ();        Close Stream}} return flag; }</span>

Call method One:

<span style= "FONT-SIZE:14PX;" > If (fileupdownload.downloadfile ("url of download file", "filename", New Action<int, int> (        int Maximum, int Value)        = >        {            //update progress bar            progressbar1.maximum = Maximum;            progressBar1.Value = Value;})))        {//the processing}</span> after downloading the file

Action notation for non-pass arguments:

(form) Form). BeginInvoke (new Action () =            {                //process            })

Call Mode two:

<span style= "FONT-SIZE:14PX;" > </span><pre name= "code" class= "CSharp" ><span style= "FONT-SIZE:14PX;" > If (fileupdownload.downloadfile ("Download file url", "filename", UpdateProgressBar)) {//download file after processing}////update progress bar private void UpdateProgressBar (int Maximum, int Value) {     progressbar1.maximum = Maximum;     progressBar1.Value = Value;} </span>

Small bet: The PROGRESSBAR1 in the calling code is Microsoft's Progress bar control

URL Example: http://www.php.cn/

If you want to charge Windows Server to download files, you need to configure in IIS, the directory is accessible, the following configuration steps are as follows:

1. Locate the directory where you want to download the file:

2. Find "Directory Browsing" on the right:

3, in the "Directory Browsing" right click: Open the function

4, you can see, enable:

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