asp.net implementation file upload with progress bar (a variety of styles)

File upload with progress bar a variety of styles are very beautiful.

Friendly hints as well as upload verification.

Part of the code:

<%@ Page language= "C #"%> <%@ Register assembly= "MattBerseth.WebControls.AJAX" MattBerseth.WebControls.AJAX.Progress "tagprefix=" MB%> <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">

Upload.aspx:

Limit size 1M protected void Page_load2 (object sender, EventArgs e) {if (this. IsPostBack) {Uploadinfo Uploadinfo = this. session["Uploadinfo"] as Uploadinfo; if (Uploadinfo = = null) {//Let the parent page know cannot process upload const string JS = "Window.parent.onComplete (' error ', ' cannot upload file.) Please refresh the page and try again); Scriptmanager.registerstartupscript (This, typeof (Upload_aspx), "Progress", JS, True); else {//Let the service side know we're not ready yet. Uploadinfo.isready = false;//upload Verify if (this.fileUpload.PostedFile!= null && this.fi LeUpload.PostedFile.ContentLength > 0 && this.fileUpload.PostedFile.ContentLength < 1048576)//Limited 1M {// Set path string path = this. Server.MapPath (@ "uploads"); String fileName = Path.getfilename (this.fileUpload.PostedFile.FileName); Upload information uploadinfo.contentlength = this.fileUpload.PostedFile.ContentLength; Uploadinfo.filename = FileName; uploadinfo.uploadedlength = 0; File exists initialization ... uploadinfo.isready = true; cache int buffersize = 1; byte[] buffer = new Byte[buffersize]; Save byte using (FileStream FS= New FileStream (Path.Combine (Path, FileName), FileMode.Create)) {while (Uploadinfo.uploadedlength < Uploadinfo.contentlength) {//from input into buffer int bytes = This.fileUpload.PostedFile.InputStream.Read (buffer, 0, buffersize) ; Bytes are written to the file stream fs. Write (buffer, 0, bytes); Update size Uploadinfo.uploadedlength + = bytes; Thread sleep uploads are slower so you can see the progress bar System.Threading.Thread.Sleep (100); }//Delete. File.delete (Path.Combine (Path, fileName)); Let the parent page know has been processed upload const string js = "Window.parent.onComplete (' success ', ' {0} has been successfully uploaded ');"; Scriptmanager.registerstartupscript (This, typeof (Upload_aspx), "Progress", string. Format (JS, fileName), true); else {if (this.fileUpload.PostedFile.ContentLength >= 1048576)//1m {const string JS = "Window.parent.onComplete" (' ER Ror ', ' exceed upload file limit size, please select ' Again '; Scriptmanager.registerstartupscript (This, typeof (Upload_aspx), "Progress", JS, True); else {const string JS = ' window.parent.onComplete (' error ', ' Upload file error '); Scriptmanager.registerstartupscript (This, typeof (Upload_aspx), "Progress ", JS, True); } Uploadinfo.isready = false; }}//Do not limit size protected void Page_Load (object sender, EventArgs e) {if (this. IsPostBack) {Uploadinfo Uploadinfo = this. session["Uploadinfo"] as Uploadinfo; Uploadinfo.isready = false; if (this.fileUpload.PostedFile!= null && this.fileUpload.PostedFile.ContentLength > 0) {string path = this. Server.MapPath (@ "uploads"); String fileName = Path.getfilename (this.fileUpload.PostedFile.FileName); Uploadinfo.contentlength = This.fileUpload.PostedFile.ContentLength; Uploadinfo.filename = FileName; uploadinfo.uploadedlength = 0; Uploadinfo.isready = true; int buffersize = 1; byte[] buffer = new Byte[buffersize]; using (FileStream fs = new FileStream (Path.Combine (Path, FileName), FileMode.Create)) {while (uploadinfo.uploadedlength < uploadinfo.contentlength) {int bytes = this.fileUpload.PostedFile.InputStream.Read (buffer, 0, buffersize); fs. Write (buffer, 0, bytes); Uploadinfo.uploadedlength + = bytes; } const String JS = "Window.parent.onComplete (' success ', ' {0} has been successfully uploaded '); "; Scriptmanager.registerstartupscript (This, typeof (Upload_aspx), "Progress", string. Format (JS, fileName), true); else {const string JS = ' window.parent.onComplete (' error ', ' Upload file error '); Scriptmanager.registerstartupscript (This, typeof (Upload_aspx), "Progress", JS, True); } Uploadinfo.isready = false; } }

The code is not finished, just package and download it.