Abner Hsu's Notes

TChannel 介面必須設定ServiceContract Attribute, 而裡面method要加上OperationContract Attribute

 

using System.ServiceModel;
namespace WCF {
    //Contract Description
    [ServiceContract]
    public IService {
        [OperationContract]
        string Say(string something);
    }
}

//use configuration setting
var serviceFactory = new ChannelFactory<IService>("*")
//create channel
var service = serviceFactory.CreateChannel();
//call
service.Say("Hello");

若是用傳入字串建立ChannelFactory，底層會去configuration system.serviceModel區塊對應的name

給"*"的話，會去找contact=TChannel完整名稱的第一筆。

另外要注意的是建立channelFactory是有成本的。

private static ConcurrentDiction<string, ChannelFactory> cache = new ConCurrentDictionary<string, ChannelFactory>();

public static ChannelFactory<T> Create<T>(string name) {
    var key = string.Format("{0}{1}", typeof(T).AssemblyQualifiedName, name);
    return cache.GetOrAdd(key, x => new ChannelFactory<T>(name)) as ChannelFactory<T>;
}

參考資料：

https://docs.microsoft.com/zh-tw/dotnet/framework/wcf/feature-details/how-to-use-the-channelfactory