ASP.NET中利用WebClient上传图片到远程服务的方法

System.Web.HttpFileCollection oFiles = System.Web.HttpContext.Current.Request.Files;

stringFilePath = oFiles[0].FileName;

stringFileName = FilePath.Substring(FilePath.LastIndexOf("\") + 1);

byte[] b =newbyte[oFiles[0].ContentLength];

System.IO.Stream fs = (System.IO.Stream)oFiles[0].InputStream;

fs.Read(b, 0, oFiles[0].ContentLength);

stringpostData ="data="+ HttpUtility.UrlEncode(Convert.ToBase64String(b));

var webclient =newWebClient();

webclient.Headers.Add("Content-Type","application/x-www-form-urlencoded");

byte[] byteArray = Encoding.UTF8.GetBytes(postData);

//byte[] buffer = webclient.UploadData("http://loca*l*hos*t/datapush/DataPush.ashx", "POST", byteArray);//ashx

byte[] buffer = webclient.UploadData("http://lo*cal*ho*st/datapush/WebServiceDataPush.asmx/DataPush","POST", byteArray);//asmx

var msg = Encoding.UTF8.GetString(buffer);

Response.Write(msg);

stringmsg ="";

byte[] filedata = Convert.FromBase64String(context.Request["data"]);

if(filedata.Length == 0)

{

msg="{"code":"上传的是空文件"}";

}

if(filedata.Length > 1048576)

{

msg ="{"code":"图片大小不能超过1M"}";

}

stringfileextension = filedata[0].ToString() + filedata[1].ToString();

if(fileextension =="7173")

{

fileextension ="gif";

}

elseif(fileextension =="255216")

{

fileextension ="jpg";

}

elseif(fileextension =="13780")

{

fileextension ="png";

}

elseif(fileextension =="6677")

{

fileextension ="bmp";

}

elseif(fileextension =="7373")

{

fileextension ="tif";

}

else

{

msg ="{"code":"上传的文件不是图片"}";

}

try

{

//保存图片

stringfilename = Guid.NewGuid().ToString("D") +"."+ fileextension;

System.IO.MemoryStream ms =newSystem.IO.MemoryStream(filedata);

System.IO.FileStream fs =newSystem.IO.FileStream(context.Server.MapPath("~/") +"/采集图片/"+ filename, System.IO.FileMode.Create);

ms.WriteTo(fs);

ms.Close();

fs.Close();

fs =null;

ms =null;

msg ="{"code":"上传图片成功"}";

}

catch(Exception exe)

{

msg ="{"code":""+ exe.Message +""}";

}