跨域调用接口——WebClient通过get和post请求api

来源：互联网发布：淘宝卖水果需要什么编辑：程序博客网时间：2024/05/23 14:52

AJAX不可以实现跨域请求，经过特殊处理才行。一般后台可以通过WebClient实现跨域请求~

//get 请求
        string url = string.Format("http://localhost:28450/api/values?str1=a&str2=b");
        WebClient wc = new WebClient();
        Encoding enc = Encoding.GetEncoding("UTF-8");
        Byte[] pageData = wc.DownloadData(url);DownloadString(url);
        string re = enc.GetString(pageData);

//post 请求
        string postData = "value=a";
        byte[] bytes = Encoding.UTF8.GetBytes(postData);
        WebClient client = new WebClient();
        client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
        client.Headers.Add("ContentLength", postData.Length.ToString());
        Encoding enc = Encoding.GetEncoding("UTF-8");
        byte[] responseData = client.UploadData("http://localhost:28450/api/values", "POST", bytes);
        string re = enc.GetString(responseData);

//调用接口Demo

 string url = "http://localhost:62691/SessionState/TransmitSession";//获取会话同步接口            string sendAccount = "fff2221111";            string acceptedAccount = "qckf_wx";            string msgType = "text";            string content = "测试下22";            string nickname = "山本松井";            //调用接口进行同步            string timeStamp = GetTimeStamp();//获取时间戳            string sign = DESEncrypt.Encrypt(timeStamp, "dxqmp52c0esxymru");            string postData = "sendAccount=" + sendAccount + "&acceptedAccount=" + acceptedAccount + "&msgType=" + msgType + "&content=" + content + "&timestamp=" + timeStamp + "&sign=" + sign + "&nickname=" + nickname + "";            byte[] bytes = Encoding.UTF8.GetBytes(postData);            WebClient client = new WebClient();            client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");            client.Headers.Add("ContentLength", postData.Length.ToString());            Encoding enc = Encoding.GetEncoding("UTF-8");            byte[] responseData = client.UploadData(url, "POST", bytes);                       string re = enc.GetString(responseData);

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来源：http://blog.csdn.net/zhaoqi5705/article/details/14920667

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