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aspx file upload and download, multi-File upload

Source: Internet
Author: User
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<%@ page language= "C #" autoeventwireup= "true" codefile= "MultiFileUpload.aspx.cs"
inherits= "Multifileupload"%>

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en"
"Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<title> dimant Multi-file upload test </title>

<script type= "Text/javascript" >
function AddFile () {
var div = document.createelement ("div");
var f = document.createelement ("input");
F.setattribute ("type", "File")
F.setattribute ("name", "File")
F.setattribute ("Size", "50")
Div.appendchild (f)
var d = document.createelement ("input");
D.setattribute ("Type", "button")
D.setattribute ("onclick", "detefile (This)");
D.setattribute ("Value", "Remove")
Div.appendchild (d)
document.getElementById ("_container"). AppendChild (Div);
}

function Detefile (o) {
while (o.tagname! = "DIV") o = O.parentnode;
O.parentnode.removechild (o);
}
</script>

<body>
<form id= "Form1" runat= "Server" method= "POST" enctype= "Multipart/form-data" >
User name: <asp:textboxid= "TextBox1" runat= "Server" ></asp:TextBox>
<div id= "_container" >
<input type= "File" size= "name=" "File"/>
</div>
<div>
<input type= "button" value= "Add File (Add)" onclick= "AddFile ()"/>
</div>
<div style= "padding:10px 0" >
<asp:buttonrunat= "Server" text= "Start uploading" id= "Uploadbutton"
onclick= "Uploadbutton_click" ></asp:Button>
</div>
<div>
<asp:label id= "strstatus" runat= "server" font-names= "Arial" font-bold= "True" font-size= "9pt"
Width= "500px" borderstyle= "None" bordercolor= "white" ></asp:Label>
</div>
</form>
</body>

C # code

Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Web;
Using System.Web.UI;
Using System.Web.UI.WebControls;

Publicpartialclass MultiFileUpload:System.Web.UI.Page
{
Protectedvoid Uploadbutton_click (object sender, EventArgs e)
{
' Traverse file Form element
httpfilecollection files = HttpContext.Current.Request.Files;

' Status information
System.Text.StringBuilder STRMSG = new System.Text.StringBuilder ("The user name you entered is:" + TextBox1.Text + "<br/>");
Strmsg.append ("uploaded files are: 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 (postedfile.filename);
if (fileName! = "")
{
FileExtension = System.IO.Path.GetExtension (fileName);
Strmsg.append ("uploaded file type:" + postedFile.ContentType.ToString () + "<br>");
Strmsg.append ("Client file Address:" + postedfile.filename + "<br>");
Strmsg.append ("FileName of uploaded file:" + filename + "<br>");
Strmsg.append ("uploaded file extension:" + fileextension + "<br>' Can be saved to a different folder depending on the extension name
Note: You may want to modify the anonymous write permission for your folder.
Postedfile.saveas (System.Web.HttpContext.Current.Request.MapPath ("images/") + FileName);
}
}
Strstatus.text = Strmsg.tostring ();
}
catch (System.Exception Ex)
{
Strstatus.text = Ex.message;
}

}
}

Download

public void Download (string path)//name of the file to download
{such as String path = "\\images\\a.text"; check its own path problem, some need to add a parent directory, some direct input file name can be
if (!string.  IsNullOrEmpty (Path)) {string filePath = Server.MapPath ("") +path;//Path// String FilePath[email protected]"C:\Users\Public\Pictures\Sample pictures\1.jpg";           FileInfo FileInfo = new FileInfo (filePath);                     response.clear ();                            Response.clearcontent ();                       response.clearheaders ();                           Response.AddHeader ("Content-disposition", "attachment;filename=" + fileinfo.name);                Response.AddHeader ("Content-length", fileInfo.Length.ToString () );                               Response.AddHeader ("content-transfer-encoding", "binary");                             Response.ContentType = "Application/octet-stream";                                response.contentencoding = System.Text.Encoding.GetEncoding ("gb2312");               Response.WriteFile (fileinfo.fullname);                          Response.Flush ();                          Response.End ();                    }
}

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Related Keywords:
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