C# 使用curl工具上传图片到微信服务器示例

雨点打透心脏的1/2处 2022-06-02 00:23 143阅读 0赞

**1.获取参数，指定文件绝对路径**

private string getCommand()
            {
                return string.Format(" -F media=@\"{0}\" \"https://api.weixin.qq.com/cgi-bin/media/upload?access_token={1}&type=images\""
                    , this.FileName
                    , this.config.Access_Token
                    );
            }

**2.执行命令**

/// <summary>
            /// 运行cmd命令
            /// 不显示命令窗口
            /// </summary>
            /// <param name="cmdExe">指定应用程序的完整路径</param>
            /// <param name="cmdStr">执行命令行参数</param>
           public static string RunCmd2(string cmdStr)
            {
                try
                {
                    using (Process myPro = new Process())
                    {
                        //指定绝对路径
                        // myPro.StartInfo.FileName = @"I:\AppSolution\curl_pkg\curl-7.57.0-win64-mingw\bin\curl.exe";
                        //使用环境变量路径
                        string enPath = Environment.GetEnvironmentVariable("CURL_HOME");
                        LogOperate.Write("当前命令的环境变量："+enPath);
                        myPro.StartInfo.FileName = enPath + @"\curl.exe";
                        myPro.StartInfo.UseShellExecute = false;
                        myPro.StartInfo.RedirectStandardInput = true;
                        myPro.StartInfo.RedirectStandardOutput = true;
                        myPro.StartInfo.RedirectStandardError = true;
                        myPro.StartInfo.CreateNoWindow = true;
                        myPro.StartInfo.Arguments = cmdStr; //指定参数
                        myPro.Start();
                        myPro.StandardInput.AutoFlush = true;
    
                        //获取cmd窗口的输出信息
                        string output = myPro.StandardOutput.ReadToEnd();
    
                        myPro.WaitForExit();
                        myPro.Close();
    
                        return output;
                    }
                }
                catch (Exception ex)
                {
                    return ex.Message;
                }
            }

**3.解析curl相应结果**

#region 远程调用
            /// <summary>
            /// 上传图片返回图片id
            /// </summary>
            /// <param name="filename"></param>
            /// <returns></returns>
            public string PostImage(string filename)
            {
                try
                {
                    this.FileName = AppDomain.CurrentDomain.BaseDirectory + "data/" + filename;
                    string command = getCommand();
    
                    LogOperate.Write("PostImage:" + command);
    
                    //执行命令获取mediaid
                    string backdata = RunCmd2(command);
                    LogOperate.Write("backdata:" + backdata);
    
                    JObject obj = JObject.FromObject(backdata);
                    JToken media_id = obj.SelectToken("media_id");
                    if (media_id == null)
                        throw new Exception($"获取media_id失败，" + backdata);
                    return media_id.ToString();
                }
                catch (Exception ex)
                {
                    LogOperate.Write("上传素材出错：" + ex.Message + "|" + ex.StackTrace);
                }
                return string.Empty;
            }
            #endregion

在参数正确的情况下，以上三步就可以获取到图片的media\_id。

更多：  
[curl工具使用简介][curl]

[如何判断微信内置浏览器(JS & .Net)][JS _ .Net]

[微信 js-sdk 界面操作接口使用][js-sdk]

[curl]: http://blog.csdn.net/u011127019/article/details/78913325
[JS _ .Net]: http://blog.csdn.net/u011127019/article/details/70162104
[js-sdk]: http://blog.csdn.net/u011127019/article/details/52704026