Use WebClient to upload files in winform

Upload the specified local file to the specified resource using the specified Method

Upload files to the server through HTTP in winform

1. server-side ProcessingProgram

<% @ Page Language = " C # " Autoeventwireup = " True " Codefile = " Upload. aspx. CS " Inherits = " Upload "   %>

Front-endCodeUpload. aspx

Using System;
Using System. Web;

Public Partial Class Upload: system. Web. UI. Page
{
// Default storage path of the server
Private   Readonly   String Serverpath =   @" C: \ upload \ " ;

Private   Void Page_load ( Object Sender, system. eventargs E)
{ // Obtain the file submitted by HTTP and rename it and save it
Foreach ( String Key In Request. Files. allkeys)
{
Httppostedfile File = Request. Files [Key];
String Newfilename = Datetime. Now. tostring ( " Yymmddhhmmssffff " )
+ File. filename. substring (file. filename. lastindexof ( ' . ' ));

Try
{ // Save the file and return the relative path address.
File. saveas ( This . Serverpath + Newfilename );
Response. Write ( " Upload/ "   + Newfilename );
}
Catch (Exception)
{
}
}
}
}

Background code upload. aspx. CS
 

2. Client Program

/**/ ///   <Summary>
/// Upload a single file to the server
///   </Summary>
///   <Param name = "uriaddress"> Uri of the received file resource, for example: Http: // xxxx/upload. aspx </Param>
///   <Param name = "filepath"> Resource file to be sent, for example, @ "D: \ workspace \ WebService related .doc </Param>
///   <Returns> Returns the relative path of the file to be saved, for example, "upload/xxxxx.jpg" or an error is returned "" </Returns>
Private   String Uploadfile ( String Uriaddress, String Filepath)
{
// Use WebClient
System. net. WebClient =   New System. net. WebClient ();
WebClient. Credentials = System. net. credentialcache. defaultcredentials;
Try
{
Byte [] Responsearray = WebClient. uploadfile (uriaddress, " Post " , Filepath );
String Savepath = System. Text. encoding. ASCII. getstring (responsearray );
Return Savepath;
}
Catch (Exception)
{
Return "";
}
}

PS. Determine whether the remote file exists

Public   Bool Uriexists ( String URL)
{
Try
{
NewSystem. net. WebClient (). openread (URL );
Return True;
}
Catch (System. net. webexception)
{
Return False;
}
}