Question

怎么通用调用WCF服务

Answer 1

一、WCF REST专用POST方法

1.1、 建立WCF REST 方法

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[ServiceContract]
public interface IBookingBizService
{
[WebInvoke(UriTemplate = "setdeliver", Method = "POST", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
[OperationContract()]
OperateResult SetDeliver(string args);

}

1.2、 POST调用WCF REST 方法

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private string UseHttpWebApproach(string serviceUrl, string resourceUrl, string method, string requestBody)
{
string responseMessage = null;
var request = WebRequest.Create(string.Concat(serviceUrl, resourceUrl)) as HttpWebRequest;
if (request != null)
{
request.ContentType = "application/json";
request.Method = method;
}

if (method == "POST" && requestBody != null)
{
byte[] requestBodyBytes = ToByteArrayUsingJsonContractSer(requestBody);

request.ContentLength = requestBodyBytes.Length;

using (Stream postStream = request.GetRequestStream())
postStream.Write(requestBodyBytes, 0, requestBodyBytes.Length);
}

if (request != null)
{
var response = request.GetResponse() as HttpWebResponse;
if (response.StatusCode == HttpStatusCode.OK)
{
Stream responseStream = response.GetResponseStream();
if (responseStream != null)
{
var reader = new StreamReader(responseStream);

responseMessage = reader.ReadToEnd();
}
}
else
{
responseMessage = response.StatusDescription;
}
}
return responseMessage;
}

private static byte[] ToByteArrayUsingJsonContractSer(string requestBody)
{
byte[] bytes = null;
var serializer1 = new DataContractJsonSerializer(typeof(string));
var ms1 = new MemoryStream();
serializer1.WriteObject(ms1, requestBody);
ms1.Position = 0;
var reader = new StreamReader(ms1);
bytes = ms1.ToArray();
return bytes;
}

调用WCF REST 方法和一般的POST方法有所不同，区别在于发送前对数据的编码，采用DataContractJsonSerializer 进行序列化。

一般的对POST方法的调用采用如何数据编码

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private static byte[] ToByteArray(string requestBody)
{
byte[] bytes = null;
bytes = Encoding.UTF8.GetBytes(requestBody);

return bytes;
}

如果要建立通用的POST调用服务，不建议采用WCF REST 形式，如果只是针对.net 平台的调用到时没有关系。