摘要:
首先通过NuGet下载signalr包在工程下新建一个类,继承Hub public class DemoHub:Hub { public class Users { public string ConnectionId { get; se... 阅读全文
摘要:
比如在Northwind数据库中有一个查询为SELECT c.CustomerId,CompanyName FROM Customers cWHERE EXISTS(SELECT OrderID FROM Orders o WHERE o.CustomerID=c.CustomerID)这里面的EX... 阅读全文