Android端

/* 上传文件至Server的方法 */public static String uploadFile(String actionUrl, String newName, Bitmap bitmap){    String end ="\r\n";    String twoHyphens ="--";    String boundary ="*****";    try{        URL url =new URL(actionUrl);        HttpURLConnection con=(HttpURLConnection)url.openConnection();      /* 允许Input、Output，不使用Cache */        con.setDoInput(true);        con.setDoOutput(true);        con.setUseCaches(false);      /* 设置传送的method=POST */        con.setRequestMethod("POST");      /* setRequestProperty */        con.setRequestProperty("Connection", "Keep-Alive");        con.setRequestProperty("Charset", "UTF-8");        con.setRequestProperty("Content-Type",                "multipart/form-data;boundary="+boundary);      /* 设置DataOutputStream */        DataOutputStream ds =                new DataOutputStream(con.getOutputStream());        ds.writeBytes(twoHyphens + boundary + end);        ds.writeBytes("Content-Disposition: form-data; "+                "name=\"file1\";"+"drawingName=\""+                newName +"\""+ end);        ds.writeBytes(end);        ByteArrayOutputStream baos = new ByteArrayOutputStream();        bitmap.compress(Bitmap.CompressFormat.PNG, 80, baos);        InputStream isBm = new ByteArrayInputStream(baos.toByteArray());      /* 取得文件的FileInputStream */       // FileInputStream fStream =new FileInputStream(uploadFile);      /* 设置每次写入1024bytes */        int bufferSize =1024;        byte[] buffer =new byte[bufferSize];        int length =-1;      /* 从文件读取数据至缓冲区 */        while((length = isBm.read(buffer)) !=-1){        /* 将资料写入DataOutputStream中 */            ds.write(buffer, 0, length);        }        ds.writeBytes(end);        ds.writeBytes(twoHyphens + boundary + twoHyphens + end);      /* close streams */        isBm.close();        ds.flush();      /* 取得Response内容 */        InputStream is = con.getInputStream();        int ch;        StringBuffer b =new StringBuffer();        while( ( ch = is.read() ) !=-1 ){            b.append( (char)ch );        }      /* 将Response显示于Dialog */      /* 关闭DataOutputStream */        ds.close();

//获取到的响应数据        return b.toString();    }    catch(Exception e){        return "";    }

C#服务端


private String getPic(){//此方法名是Android端上传图片中接口地址中使用的
    //最主要的代码：HttpContext.Request.InputStream；获取Android中上传的字节流数据    byte[] byts = new byte[HttpContext.Current.Request.InputStream.Length];    HttpContext.Current.Request.InputStream.Read(byts, 0, byts.Length);    string req = System.Text.Encoding.Default.GetString(byts);    req = HttpContext.Current.Server.UrlDecode(req);
    return req;//返回给android}

Android中上传图片到服务端C#接收图

Android端

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