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, 0, fileLength); item.InputStream.Seek(0, 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, 0, bytes.Length); Request.InputStream.Seek(0, 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(1000, 9999); //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(500); } } catch (Exception ex) { } } context.Response.ContentType = "text/plain"; context.Response.Write(re); context.Response.End(); } } public bool IsReusable { get { return false; } } }
时间: 2024-11-05 23:24:07