C# Windows服務：發送SOAP請求並接收回應
本文介紹如何建立一個C# Windows服務來傳送SOAP請求並接收回應。此方法利用C#的原生功能，高效且便利。
以下程式碼提供了一個替代方案：
<code class="language-csharp">using System.Xml;
using System.Net;
using System.IO;
public static void CallWebService()
{
string url = "http://xxxxxxxxx/Service1.asmx";
string action = "http://xxxxxxxx/Service1.asmx?op=HelloWorld";
XmlDocument soapEnvelopeXml = CreateSoapEnvelope();
HttpWebRequest webRequest = CreateWebRequest(url, action);
InsertSoapEnvelopeIntoWebRequest(soapEnvelopeXml, webRequest);
// 开始异步调用Web请求
IAsyncResult asyncResult = webRequest.BeginGetResponse(null, null);
// 暂停线程，直到调用完成
asyncResult.AsyncWaitHandle.WaitOne();
string soapResult;
using (WebResponse webResponse = webRequest.EndGetResponse(asyncResult))
{
using (StreamReader rd = new StreamReader(webResponse.GetResponseStream()))
{
soapResult = rd.ReadToEnd();
}
Console.Write(soapResult);
}
}
private static HttpWebRequest CreateWebRequest(string url, string action)
{
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
webRequest.Headers.Add("SOAPAction", action);
webRequest.ContentType = "text/xml;charset=\"utf-8\"";
webRequest.Accept = "text/xml";
webRequest.Method = "POST";
return webRequest;
}
private static XmlDocument CreateSoapEnvelope()
{
XmlDocument soapEnvelopeDocument = new XmlDocument();
soapEnvelopeDocument.LoadXml(@"<envelope http:="" xmlns:soap-env="" xmlns:xsd="" xmlns:xsi=""><body><helloworld http:="" soap-env:encoding xmlns=""><int1 xsd:integer="" xsi:type=""></int1></helloworld></body>
</envelope>");
return soapEnvelopeDocument;
}
private static void InsertSoapEnvelopeIntoWebRequest(XmlDocument soapEnvelopeXml, HttpWebRequest webRequest)
{
using (Stream stream = webRequest.GetRequestStream())
{
soapEnvelopeXml.Save(stream);
}
}</code>此方法提供了一種靈活高效的發送SOAP請求並接收回應的方式，無需依賴外部函式庫。
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