使用 POST 方法调用 webservice(asmx)

Question

嗨，我想在 c# 中从桌面应用程序调用我的 Web 应用程序的 Web 服务，我已经尝试过，但它给出了错误内部服务器错误 500。我的 Web 服务 URL 太长，所以我需要使用 POST 方法传递它。 我的代码中有什么不对？请有任何建议。

 private void button1_Click(object sender, EventArgs e)
        {
            //HttpWebRequest request = (HttpWebRequest)WebRequest.Create("URL OF Webservice");
            //WebResponse response = request.GetResponse();
            //response.Close();

            using (var wb = new WebClient())
            {

                var data = new NameValueCollection();
                data["authU"] = "value";
                data["authP"] = "value";
                data["cmp"] = "value";
                data["sales_id"] = "value";
                data["Login"] = "value";
                data["total_amount"] = "value";
                data["total_discount"] = "value";
                data["net_amount"] = "value";
                data["change"] = "value";
                data["tax"] = "value";
                data["ip"] = "value";
                data["Tran_Type"] = "value";
                data["mac_id"] = "value";
                data["ref_id"] = "value";
                data["venue_id"] = "value";
                data["store_name"] = "value";
                data["actual_total_amount"] = "value";
                data["temp_sale_id"] = "value";
                data["is_return"] = "value";
                data["created_date"] = "2018-06-14 14:26:09";
                data["modify_date"] = "2018-06-14 14:26:09";
                data["mode"] = "value";
                data["value"] = "value";
                data["machine_id"] = "value";
                data["location_id"] = "value";
                data["input_amount"] = "value";
                data["sale_type"] = "value";
                data["is_table"] = "value";
                data["Payment_Date"] = "2018-06-14 14:26:09";
                data["Payment_Amount"] = "value";
                data["Table_name"] = "value";
                data["is_close"] = "value";
                data["values"] = "value";

                var response = wb.UploadValues("http://localhost:53653/POS_WebService.asmx/Sales_Master_Full", "POST", data);
                string responseInString = Encoding.UTF8.GetString(response);

Answer 1

将数据发布到 Web 服务并不是与它们交互的标准方式。您指向 WSDL 的副本，在本例中，位于：

http://localhost:53653/POS_WebService.asmx?WSDL

并让 VS 创建一个代理包装器来调用函数。

请参阅https://stackoverflow.com/a/12710348/656243 了解如何添加引用。从那里开始，假设您将引用添加为 WebService1，您可以将函数作为 Web 服务的成员调用：

WebService1 svc = new Webservice1;
var data = svc.Sales_Master_Full();

就好像它是一个普通的 C# 函数一样。

Answer 2

您需要如下设置HTTP Content type header：

using (var wb = new WebClient())
{
    wb.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";

    var data = new NameValueCollection();
    // ...
    var response = wb.UploadValues("http://localhost:53653/POS_WebService.asmx/Sales_Master_Full", "POST", data);
    // ...
}