HttpClient 上传文件

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 HttpClient client = new HttpClient();            MultipartFormDataContent content = new MultipartFormDataContent();            //文件内容            StreamContent file1 = new StreamContent(File.Open("D:/1.txt", FileMode.Open));            //表示传的文件            file1.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data");            file1.Headers.ContentDisposition.FileName = "1.txt"; //文件名            file1.Headers.ContentDisposition.Name = "file1"; //key的名字            //将文件附加到content中 多个文件同理            content.Add(file1);//上传文本信息            HttpContent strParam = new StringContent("asdasdadsa");            strParam.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data");            strParam.Headers.ContentDisposition.Name = "a";            content.Add(strParam);var resu = client.PostAsync("http://localhost:2965/WebForm1.aspx", content).Result.Content.ReadAsStringAsync().Result;

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