实际情况一般有单独的站点存放静态文件，比如图片、office文档等。A站点的操作需要上传文件到B站点，
下面介绍一种方法通过System.Net.WebClient类的UploadData方法 。
uploadFile.aspx html：
<form id="form1" runat="server">
<div>
<asp:FileUpload runat="server" ID="fileUp" AllowMultiple="true" />
<asp:Button runat="server" ID="btnLoad" Text="Upload" OnClick="btnLoad_Click" />
</div>
</form>
uploadFile.cs 后台代码
protected void btnLoad_Click(object sender, EventArgs e)
{
if (fileUp.HasFile)
{
var list = fileUp.PostedFiles;
foreach (var item in list)
{
string fileDoc = System.IO.Path.GetExtension(item.FileName).ToLower(); //后缀名
int fileLength = (int)item.InputStream.Length;//InputStream.Length; byte[] byteFile = new byte[fileLength];
item.InputStream.Read(byteFile, , fileLength);
item.InputStream.Seek(, System.IO.SeekOrigin.Begin); //读取流之后设置设置当前流的位置，因为md5加密也需要用到该流 string md5Value = Com.MD5.MyMD5.getMd5Hash(item.InputStream); //得到上传文件流的MD5string url = string.Format("http://localhost:4884/SaveFile.ashx?name=" + md5Value + "&ext=" + fileDoc); //保存流的处理文件路径 System.Net.WebClient wc = new System.Net.WebClient();
byte[] bts = wc.UploadData(url, "POST", byteFile);
wc.Dispose();
string filePath = System.Text.Encoding.UTF8.GetString(bts); //获取SaveFile.ashx返回
}
}
}
Com.MD5.MyMD5.getMd5Hash方法请看：我的C# MD5摘要算法、哈希算法SaveFile.ashx 处理程序
/// <summary>
/// SaveFile 的摘要说明
/// </summary>
public class SaveFile : IHttpHandler
{ public void ProcessRequest(HttpContext context)
{
lock (context.Request.InputStream)
{
HttpRequest Request = context.Request;
string path = ""; string filenName = "";
string re = "";
if (Request.HttpMethod.ToLower() == "post")
{
try
{
using (Request.InputStream)
{
string name = Request["name"];
string s = Request["ext"];
byte[] bytes = new byte[Request.InputStream.Length];
Request.InputStream.Read(bytes, , bytes.Length);
Request.InputStream.Seek(, SeekOrigin.Begin);//设置当前流的位置
//Request.InputStream.Position = 0;
Request.InputStream.Flush();
Request.InputStream.Close();
Request.InputStream.Dispose();
Random rnd = new Random();
int n = rnd.Next(, );
//filenName = "/file/" + n.ToString() + "-" + DateTime.Now.ToString("yyyyMMddHHmmssss") + s;
filenName = "/file/"+name + s;
path = context.Server.MapPath(filenName); FileStream fs = new FileStream(path, FileMode.Create);
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(bytes);
bw.Close();
fs.Close();
re = filenName; //System.Threading.Thread.Sleep();
}
}
catch (Exception ex)
{ }
} context.Response.ContentType = "text/plain";
context.Response.Write(re);
context.Response.End();
}
} public bool IsReusable
{
get
{
return false;
}
}
}
HttpFileCollection：
void save(HttpRequest Request)
{
var file = Request.Files[];
var filenName = "/file/" + file.FileName;
var path = HttpContext.Current.Server.MapPath(filenName);
file.SaveAs(path);
}