本文实例讲述了C#远程发送和接收数据流生成图片的方法。分享给大家供大家参考。具体如下：
将图片转成数据流方式发送到远程服务，在通过服务器后台程序来接收数据流，再保存成图片存放在需要的地方。
这种方式就类似上传图片功能一样，希望能给一些大家另一种上传图片功能的方法。
发送数据流方法
/// <summary>
/// PostBinaryData
/// </summary>
/// <param name="url">要发送的 url 网址</param>
/// <param name="bytes">要发送的数据流</param>
/// <returns></returns>
public string PostBinaryData(string url, byte[] bytes)
{
//下面是测试例子
//string url = "http://www.test.com/test.ashx";
//string img = HttpContext.Current.Server.MapPath("../images/test.jpg");
//byte[] bytes = File.ReadAllBytes(img);
HttpWebRequest wRequest = (HttpWebRequest)WebRequest.Create(url);
wRequest.ContentType = "multipart/form-data";
wRequest.ContentLength = bytes.Length;
wRequest.Method = "POST";
Stream stream = wRequest.GetRequestStream();
stream.Write(bytes, 0, bytes.Length);
stream.Close();
HttpWebResponse wResponse = (HttpWebResponse)wRequest.GetResponse();
StreamReader sReader = new StreamReader(wResponse.GetResponseStream(), System.Text.Encoding.UTF8);
string str = sReader.ReadToEnd();
sReader.Close();
wResponse.Close();
return str;
}
接收数据流方法
public void GetBinaryData()
{
string imgFile = DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg";
string filePath = HttpContext.Current.Server.MapPath(imgFile);
//方法一
int lang = HttpContext.Current.Request.TotalBytes;
byte[] bytes = HttpContext.Current.Request.BinaryRead(lang);
string content = System.Text.Encoding.UTF8.GetString(bytes);
FileStream fStream = new FileStream(filePath, FileMode.Create, FileAccess.Write);
BinaryWriter bw = new BinaryWriter(fStream);
bw.Write(bytes);
bw.Close();
fStream.Close();
//方法二
Bitmap img = new Bitmap(HttpContext.Current.Request.InputStream);
img.Save(filePath);
HttpContext.Current.Response.Write("ok");
}
希望本文所述对大家的C#程序设计有所帮助。
