httpwebrequest post方式上传图片的问题
程序功能 使用post数据的方式提交一些内容 其中就包括上传图片 程序没有报错 就是数据提交不了。贴上代码：希望高手指教或加我QQ 363455936 详谈
程序代码： ListViewItem item = this.Sendlist.Items[sendindex];
string Category = item.SubItems[1].Text;
string Title = item.SubItems[2].Text;
string Content = item.SubItems[3].Text;
string Pic = item.SubItems[4].Text;
string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
WebClient client = new WebClient();
string filepath = @"C:\Users\Administrator\Downloads\image.jpg";
client.DownloadFile(Pic, filepath);
//string boundary = "-----------------------------7db2be252903bc";
string poststr = "category=" + Category + "&district=luwan_xintiandi&title=" + Title + "&description=<p>" + Content + "</p>";
StringBuilder sb = new StringBuilder();
foreach (string c in poststr.Split('&'))
{
string[] itemdata = c.Split('=');
if (itemdata. Length != 2)
{
break;
}
string name = itemdata[0];
string value = itemdata[1];
sb.Append(boundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"" + name + "\"");
sb.Append("\r\n\r\n");
sb.Append(value);
sb.Append("\r\n");
}
// 文件域的数据
sb.Append(boundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"image\";filename=\"" +filepath + "\"");
sb.Append("\r\n");
sb.Append("Content-Type: ");
sb.Append("image/x-png");
sb.Append("\r\n\r\n");
string postHeader = sb.ToString();
//string postdata = boundary
// + "\r\nContent-Disposition: form-data; name=\"category\"\r\n"
// + "\r\n" + Category//分类
// + "\r\n" + boundary
// + "\r\nContent-Disposition: form-data; name=\"district\"\r\n"
// + "\r\nluwan_xintiandi"//二级分类
// + "\r\n"
// + "\r\nContent-Disposition: form-data; name=\"title\"\r\n"
// + "\r\n" + Title //标题
// + "\r\n-----------------------------7db2be252903bc"
// + "\r\nContent-Disposition: form-data; name=\"description\"\r\n"
// + "\r\n<p>" + Content + "</p>"//正文
// + "\r\n-----------------------------7db2be252903bc"
// + "\r\nContent-Disposition: form-data; name=\"image\"; filename=\"" + Pic + "\""//图片
// + "\r\nContent-Type: image/x-png\r\n"
// + "\r\n-----------------------------7db2be252903bc"
// + "\r\nContent-Disposition: form-data; name=\"commit\"\r\n"
// + "\r\nPost This Now"
// + "\r\n-----------------------------7db2be252903bc--\r\n";
//byte[] data = Encoding.Default.GetBytes(postdata);
HttpWebRequest wrq = (HttpWebRequest)WebRequest.Create("http://");
wrq.CookieContainer = cc;
wrq.Method = "POST";
wrq.Accept = "*/*";
wrq.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Tablet PC 2.0)";
wrq.ContentType = "multipart/form-data; boundary="+boundary;
wrq.Referer = "http://";
byte[] postHeaderBytes = Encoding.Default.GetBytes(postHeader);
//构造尾部数据
string enddata = "\r\n" + boundary
+ "\r\nContent-Disposition: form-data; name=\"commit\"\r\n"
+ "\r\nPost This Now"
+ "\r\n" + boundary + "--\r\n";
byte[] boundaryBytes = Encoding.Default.GetBytes(enddata);
FileStream fileStream = new FileStream(filepath, FileMode.Open, FileAccess.Read);
long length = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length;
long leng = data.Length + fileStream.Length;
wrq.ContentLength = leng;
Stream requestStream = wrq.GetRequestStream();
// 输入头部数据
requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
// 输入文件流数据
byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)fileStream.Length))];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
requestStream.Write(buffer, 0, bytesRead);
//输入尾部数据
requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
//requestStream.Write(data, 0, data.Length);
HttpWebResponse wrp = (HttpWebResponse)wrq.GetResponse();
string str = new StreamReader(wrp.GetResponseStream(), Encoding.Default).ReadToEnd();
wrp.Close();
}
catch (Exception ex)
{
MessageBox.Show("发送当前信息时出错,err:" + ex.ToString());
return;
}
