In previous web applications, uploading files are a very troublesome thing, now there is .NET, file uploads become gently easy. The following example implements a multi-file upload function. You can dynamically add input forms, and the number of files upload is not limited. code show as below:
! MultiUpload.aspx <% @ Page Language = "vb" AutoEventWireup = "false" Codebehind = "MultiUpload.aspx.vb" Inherits = "aspxWeb.MultiUpload"%> Multi-file upload </ title> <script language =" javascript "> Function addFile () {var str = '<input type =" file "size =" 50 "Name =" file "> 'document.getlementByid (' myfile '). InsertAdjacenthtml (" beforeend ", str)} </ script> </ head> <body> <form id =" form1 "method =" post "runat = "Server" enctype = "multipart / form-data"> <center> <ask: label runat = "server" id = "mytitle"> </ ask: Label> <p id = "myfile"> <input type = "file" size = "50" name = "file"> </ p> <p> <input type = "οnclick =" addFile () "> <ask =" addfile ()> <ask: button runat = "Server" text = "Upload" ID = "Upload"> </ ask: button> <input οnclick = "this.form.reset ()" type = "" value = "reset (reset)> </ P> </ center> <p align = "center"> <asp: label id = "strstatus" run at = "server" font-name = "Song" font-bold = "true" font-size = "9pt" width = "500px" borderStyle = "bordercolor ="</p>
<p>White "> </ asp: label> </ p> </ form> </ body> </ html> postcode: multiupload.aspx.vbpublic class multiupload inherits system.Web.ui.page protected withevents upload as system.Web .UI.WebControls.Button Protected WithEvents MyTitle As System.Web.UI.WebControls.Label Protected WithEvents strStatus As System.Web.UI.WebControls.Label # Region "Web Form Designer Generated Code" 'This call is required by the Web Form Designer <System.Diagnostics.DebuggerStepThrough ()> Private Sub InitializeComponent () End Sub Private Sub Page_Init (ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init 'CODEGEN:. This method call is required by the Web Form Designer 'Do not modify it using the code editor. InitializeComponent () End Sub # End Region Private Sub Page_Load (ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load MyTitle.Text = "<h3 > Multi-file upload </ h3> "UPLOAD.TEXT =" Start Upload "if (me.ispostback) Then Me.SaveImages () End Sub Private Funct ion SaveImages () As System.Boolean 'File traversal form elements Dim files As System.Web.HttpFileCollection = System.Web.HttpContext.Current.Request.Files' status Dim strMsg As New System.Text.StringBuilder ( "file upload Sizes: <hr color = red> ") DIM IFILE AS System.Int32 Try for ifile = 0 To FILES.COUNT - 1 'Check File Extension Name DIM PostedFile As System.Web.httppostedFile = Files (ifile) DIM FileName, FileExtension As system.string filename = system.io.path.getFileName (PostedFile.FileName) IFEEXTENSION =</p>
<p>System.io.path.getextension (filename) strmsg.append ("Uploaded file type:" PostedFile.conteType.toTRING () "<br>") strmsg.append ("Client File Address:" PostedFile. Filename "<br>") strmsg.append ("Upload file name:" filename "<br>") strmsg.append ("Upload file extension:" fibension "<br> <hr > ") 'Can be saved to different folder postedfile.saveas (System.Web.httpContext.current.request.mappath) end if next strastatus.text = strmsg.tostring () Return True Catch Ex As System.Exception strStatus.Text = Ex.Message Return False End Try End FunctionEnd ClassC # version UpLoad.aspx <% @ Page language = "c #" Codebehind = "UpLoad.aspx.cs" AutoEventWireup = " False "inherits =" Webportal.upload "%> <! doctype html public" - // w3c // DTD html 4.0 transitional // en "> <html> <head> <title> multi-file upload </ title> <script Language = "javascript"> function addfile () {var str = '<input type = "file" size = "50" name = "file">' document.getlement BYID ('myfile'). INSERTADJACENTHTML ("BeForend", Str)} </ script> </ head> <body> <form id = "form1" method = "post" runat = "server" eNctype = "Multipart / Form -data> <div align = "center"> <h3> multi-file upload </ h3> <p id = "myfile> <input type ="</p>
<p>File "size =" 50 "name =" file "> </ p> <p> <input type =" οnclick = "addFile ()"> <input οnclick = "this. Form.Reset () "Type =" button "value =" reset (reset)> <ask: button runat = "server" text = "Start Upload" ID = "UploadButton"> </ asp: button> </ P> <p> <asp: label id = "strstatus" runat = "server" font-name = "True" font-bold = "true" font-size = "9pt" width = "500px" border = "none" BorderColor = "White"> </ asp: label> </ p> </ div> </ form> </ body> </ html> UPLOAD.ASPX.CSUSING System; use system.collections; using system.componentmodel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; namespace WebPortal {/ // <summary> /// Upload's summary description.</p>
<p>/// multi file upload /// </ summary> public class Upload: System.Web.UI.Page {protected System.Web.UI.WebControls.Button UploadButton; protected System.Web.UI.WebControls.Label strStatus; Private void page_load (object sender, system.eventargs e) {// The user code is placed here to initialize the page if (this.ispostback) this.saveImages ();} private boolean saveimages () {/// 'traversing File form elements HttpFileCollection files = HttpContext.Current.Request.Files; /// 'state information System.Text.StringBuilder strMsg = new System.Text.StringBuilder (); strMsg.Append ( "upload file are: <hr color = Red> "); try {for (int ifile = 0; ifile <files.count; ifile ) {/// 'Check file extension name httppostedfile postedfile = files [ifile]; string filename, fileExtension; filename = system.io. Path.GetFileName; if (fileEname! = ") {FileExtension = system.io.path.Getextension (filename); strmsg.Append (" Uploaded file type: " Po Stedfile.ContentType.toString () "<br>"); strmsg.append ("Client File Address:" PostedFile.FileName <BR> "); strmsg.append (" Upload file name: " Filename "<br>"); strmsg.append ("Extension of Uploaded File:" FileExtension "<br> <hr>"); /// 'can save to different files according to the different files Clip /// Note: You may want to modify anonymous write permission for your folder.</p></div><div class="text-center mt-3 text-grey">
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