使用WebClient上传文件时的错误问题解决和上传例子

在winform 开发中使用WebClient上传文件时需要做如下设置：

1、在iis中将uploadfile文件夹设置为可匿名访问

2、在iis中上传目录要设置为可写

3、在iis中Web服务扩展webDAV要启用

4、在物理目录中设置everyone可写

 

上传例子：

 

/// <summary> /// WebClient上传文件至服务器 ///</summary> ///<param name="localFilePath">文件名，全路径格式</param> ///<param name="serverFolder">服务器文件夹路径</param> ///<param name="reName">是否需要修改文件名，这里默认是日期格式</param> ///<returns></returns> public bool UploadFile(string localFilePath, string serverFolder, bool reName) { string fileNameExt, newFileName, uriString; serverFolder = serverFolder + "uploadfile/products/"; if (reName) { fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf(".") +1); newFileName = DateTime.Now.ToString("yyMMddhhmmss") + "." + fileNameExt; } else { newFileName = localFilePath.Substring(localFilePath.LastIndexOf("//")+1); } if (!serverFolder.EndsWith("/") && !serverFolder.EndsWith("//")) { serverFolder = serverFolder +"/"; } uriString = serverFolder + newFileName; //服务器保存路径,如：http://www.xxx.com/uploadfile/ //创建WebClient实例 WebClient myWebClient =new WebClient(); myWebClient.Credentials = CredentialCache.DefaultCredentials; //要上传的文件 FileStream fs = new FileStream(localFilePath, FileMode.Open, FileAccess.Read); BinaryReader r = new BinaryReader(fs); try { //或使用UploadFile方法可以用下面的格式 //myWebClient.UploadFile(uriString, "PUT", localFilePath); byte[] postArray = r.ReadBytes((int)fs.Length); Stream postStream = myWebClient.OpenWrite(uriString, "PUT"); if (postStream.CanWrite) { postStream.Write(postArray, 0, postArray.Length); } else { System.Windows.Forms.MessageBox.Show("文件目前不可写！"); } postStream.Close(); } catch (Exception ex) { System.Windows.Forms.MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); return false; } return true; }

 

得到远程图片的方法：

//uriString为图片的绝对路径，如：http://www.xxx.com/xxx.jpgpbImg.Image = Image.FromStream(System.Net.WebRequest.Create(uriString).GetResponse().GetResponseStream());