SQLException未處理在建立與SQL Server的連接時發生網絡相關或實例特定的錯誤

Question

我在win7 32位中安裝了SQL Server 2008 R2和Visual Studio 2010。他們安裝正確。而且每個人都可以獨自行事但是當我想從Visual Studio連接到SQL Server Management Studio時，出現此錯誤。 （我想連接到本地數據庫）：

SQLException was unhandled A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL server is configured to allow remote connections.(provider:Named Pipes Provider,error:40-could not open a connection to SQL Server)

這是我連接代碼：

cn = new SqlConnection(); 
cn.ConnectionString = "Data Source=(local); Initial Catalog=XXX_amlak; User ID=sa; password=XXX"; 
cn.Open(); 

Answer 1

使用此的ConnectionString連接到本地數據庫：

cn.ConnectionString = "Data Source=.\SqlExpress; Initial Catalog=XXX_amlak; User ID=sa; password=XXX";

或檢查出這個問題： How to connect to local instance of SQL Server 2008 Express