[Asp.net] Using WebClient to upload images to remote services,

[Asp.net] Using WebClient to upload images to remote services,

I. Client

1. Page

1 <form id = "Form1" method = "post" runat = "server" enctype = "multipart/form-data"> 2 <input id = "MyFile" type = "file "runat =" server "/> 3 <br/> 4 <br/> 5 <asp: button ID = "Button1" runat = "server" Text = "Upload File" OnClick = "button#click"> </asp: Button> 6 </form>

 

2. Background

 1             System.Web.HttpFileCollection oFiles = System.Web.HttpContext.Current.Request.Files; 2             string FilePath = oFiles[0].FileName; 3             string FileName = FilePath.Substring(FilePath.LastIndexOf("\\") + 1); 4             byte[] b = new byte[oFiles[0].ContentLength]; 5             System.IO.Stream fs = (System.IO.Stream)oFiles[0].InputStream; 6             fs.Read(b, 0, oFiles[0].ContentLength); 7             string postData = "data=" + HttpUtility.UrlEncode(Convert.ToBase64String(b)); 8             var webclient = new WebClient(); 9             webclient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");10             byte[] byteArray = Encoding.UTF8.GetBytes(postData);11             //byte[] buffer = webclient.UploadData("http://localhost/datapush/DataPush.ashx", "POST", byteArray);//ashx12             byte[] buffer = webclient.UploadData("http://localhost/datapush/WebServiceDataPush.asmx/DataPush", "POST", byteArray);//asmx13             var msg = Encoding.UTF8.GetString(buffer);14             Response.Write(msg);

 

 

Ii. Server

1 string msg = ""; 2 byte [] filedata = Convert. fromBase64String (context. request ["data"]); 3 if (filedata. length = 0) 4 {5 msg = "{\" code \ ": \" uploaded empty file \ "}"; 6} 7 if (filedata. length> 1048576) 8 {9 msg = "{\" code \ ": \" the image size cannot exceed 1 MB \ "}"; 10} 11 string fileextension = filedata [0]. toString () + filedata [1]. toString (); 12 if (fileextension = "7173") 13 {14 fileextension = "gif"; 15} 16 else if (fileextension = = "255216") 17 {18 fileextension = "jpg"; 19} 20 else if (fileextension = "13780") 21 {22 fileextension = "png "; 23} 24 else if (fileextension = "6677") 25 {26 fileextension = "bmp"; 27} 28 else if (fileextension = "7373 ") 29 {30 fileextension = "tif"; 31} 32 else33 {34 msg = "{\" code \ ": \" the uploaded file is not an image \"}"; 35} 36 37 try38 {39 // Save the image 40 string filename = Guid. newGuid (). toString ("D") + ". "+ fileextension; 41 System. IO. MemoryStream MS = new System. IO. MemoryStream (filedata); 42 System. IO. FileStream fs = new System. IO. FileStream (context. Server. MapPath ("~ /") +"/Capture image/"+ filename, System. IO. fileMode. create); 43 ms. writeTo (fs); 44 ms. close (); 45 fs. close (); 46 fs = null; 47 MS = null; 48 msg = "{\" code \ ": \" uploaded image \"}"; 49} 50 catch (Exception exe) 51 {52 msg = "{\" code \ ": \" "+ exe. message + "\"} "; 53} 54