C # webform site picture Save code

Good hard to generate a two-dimensional code, and then to achieve the click "Save Picture", pop-up selection path to save the effect.

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    stringQrcodeurl =""; stringUsername =""; protected voidBtnsave_click (Objectsender, EventArgs e) {        //Create a pictureBitmap image = Create_imgcode (Qrcodeurl,5); //Save Picture        stringServer_saveurl = Server.MapPath ("~/") +"Upload\\qrcode";        Saveimg (Server_saveurl, image); FileDownload (Server_saveurl+"\\"+ Username +". PNG"); }    /// <summary>      ///generate two-dimensional code images/// </summary>      /// <param name= "Codenumber" >a string to generate a two-dimensional code</param>           /// <param name= "Size" >size Size</param>      /// <returns>Two-dimensional code image</returns>       PublicBitmap Create_imgcode (stringCodenumber,intsize) {        //creating a two-dimensional code generation classQrcodeencoder Qrcodeencoder =NewQrcodeencoder (); //Setting the encoding modeQrcodeencoder.qrcodeencodemode =Qrcodeencoder.encode_mode.        BYTE; //Setting the Encoding measurement degreeQrcodeencoder.qrcodescale =size; //set the encoded versionQrcodeencoder.qrcodeversion =0; //set encoding error correctionQrcodeencoder.qrcodeerrorcorrect =qrcodeencoder.error_correction.        M //generate two-dimensional code imagesSystem.Drawing.Bitmap image =Qrcodeencoder.encode (Codenumber); returnimage; }     /// <summary>      ///Save the picture on the server side/// </summary>      /// <param name= "strpath" >Save Path</param>      /// <param name= "img" >Image</param>       Public stringSaveimg (stringstrpath, Bitmap img) {        //save picture to directory        if(!directory.exists (strpath)) {            //if the current directory does not exist, createdirectory.createdirectory (strpath); }        //file name        stringfilename = strpath +"/"+ Username +". PNG"; if(file.exists (filename)) {returnfilename; } img.        Save (filename, System.Drawing.Imaging.ImageFormat.Png); returnfilename; }    /// <summary>    ///WebForm Save the picture in the client/// </summary>    /// <param name= "Fullfilename" ></param>    Private voidFileDownload (stringfullfilename) {FileInfo DownloadFile=NewFileInfo (fullfilename);        Response.Clear ();        Response.ClearHeaders (); Response.Buffer=false; Response.ContentType="Application/octet-stream"; Response.appendheader ("content-disposition","attachment;filename="+Httputility.urlencode (Downloadfile.fullname, System.Text.Encoding.UTF8)); Response.appendheader ("Content-length", DownloadFile.Length.ToString ());        Response.WriteFile (Downloadfile.fullname);        Response.Flush ();    Response.End (); }

Are online search, looking for a long time in the thought of saving the image to the server, and then download from the server to the customer service side.

C # webform site picture Save code