将foreach转换为linq

Question

任何人都可以告诉我如何将以下代码转换为linq。我正在尝试使用合同名称从web.config文件获取端点地址。

我需要将每个循环转换为linq。

string csEndPoint =null;
ClientSection clientSettings = ConfigurationManager.GetSection("system.serviceModel/client") as ClientSection;
   foreach (ChannelEndpointElement endpoint in clientSettings.Endpoints) {
                    if (endpoint.Contract == "CsWebService.ICsWebService") {
                        ccEndPoint = endpoint.Address.ToString();
                        break;
                    }
                }

Answer 1

Linq使用FirstOrDefault

进场

string csEndPoint = clientSection.Endpoints.Cast<ChannelEndpointElement>().FirstOrDefault(e => e.Contract == "CsWebService.ICsWebService")?.Address.ToString();

.NET 4.5及以下

string csEndPoint = clientSection.Endpoints.Cast<ChannelEndpointElement>()
                                 .Where(e => e.Contract == "CsWebService.ICsWebService")
                                 .Select(x => x.Address.ToString()).FirstOrDefault();

Answer 2

试试这个

string csEndPoint = (from k in clientSettings.Endpoints
         where k.Contract == "CsWebService.ICsWebService"
         select k.Address.ToString()).FirstOrDefault();