如何上傳圖片與多形式的數據服務器

Question

我想效仿這一要求

這是從嗅探

-----------------------------708299735697 
Content-Disposition: form-data; name="_file" 

1.jpg 
-----------------------------708299735697 
Content-Disposition: form-data; name="file"; filename="blob" 
Content-Type: image/png 

‰PNG 
............ 

這是我的IE編程代碼日誌。

var taimalda = DateTime.Now.Ticks; 
var boundary = "------------------------" + taimalda ; 
var newLine = Environment.NewLine; 
var propFormat = "--" + boundary + newLine + 
       "Content-Disposition: form-data; name=\"{0}\"" + newLine + newLine + 
       "{1}" + newLine; 
var fileHeaderFormat = "--" + boundary + newLine + 
         "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"" +  
         newLine + "Content-Type: image/png"; 

var req = (HttpWebRequest)HttpWebRequest.Create("http://xxx.ru/new_style/flash_uploader/upload.php?fileapi"+taimalda); 
req.CookieContainer = s; // 
System.Net.ServicePointManager.Expect100Continue = false; 
req.Referer = "http://www.xxx.ru/user/setting/set_info"; // add referer 

req.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0"; // add useragent 
req.Method = WebRequestMethods.Http.Post; // post request 
req.ContentType = "multipart/form-data; boundary=" + boundary; 

using (var reqStream = req.GetRequestStream()) 
{ 
    var reqWriter = new StreamWriter(reqStream); 
    var tmp = string.Format(propFormat, "_file", "1.jpg"); 
    reqWriter.Write(tmp); 
    tmp = string.Format(fileHeaderFormat, "file", "blob"); 
    reqWriter.Write(tmp); 
    reqWriter.Flush(); 
} 
var res = req.GetResponse(); 
using (var resStream = res.GetResponseStream()) 
{ 
    var reader = new StreamReader(resStream); 
    var ext = reader.ReadToEnd(); 
} 

但是這個代碼僅發送標題沒有我的文件（1.JPG）

 
    -----------------635031060420469298 
    Content-Disposition: form-data; name="_file" 

    1.jpg 
    --------------------------635031060420469298 
    Content-Disposition: form-data; name="file"; filename="blob" 
    Content-Type: image/png 

Answer 1

我沒有看到任何地方你實際上是閱讀1.JPG文件和寫作個字節到請求流。

Answer 2

您需要的文件的字節寫入Stream，而不是StreamWriter：

using (var reqStream = req.GetRequestStream()) 
using (var reqWriter = new StreamWriter(reqStream)) 
{ 
    reqWriter.Write(propFormat, "_file", "1.jpg"); 
    reqWriter.Write(fileHeaderFormat, "file", "blob"); 

    int ken = fs.Read(buffer, 0, buffer.Length); 
    reqStream.Write(buffer, 0, ken); 
    reqStream.Flush(); 
}