关于SQL连接语句中的Integrated Security=SSPI/ture/false
解决方法:
即:Security Support Provider Interface
设置Integrated Security为 True 的时候,连接语句前面的 UserID, PW 是不起作用的,即采用windows身份验证模式。
只有设置为 False 或省略该项的时候,才按照 UserID, PW 来连接。
Integrated Security 可以设置为: True, false, yes, no ,这四个的意思很明白了,还可以设置为:sspi ,相当于 True,建议用这个代替 True。
initial catalog与database的区别是什么
Initial Catalog:
DataBase:
两者没有任何区别只是名称不一样,就好像是人类的真实姓名与曾用名一样。。都可以叫你。
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Integrated Security=SSPI 这个表示以当前WINDOWS系统用户身去登录SQL SERVER服务器,,如果SQL SERVER服务器不支持这种方式登录时,就会出错。
你可以使用SQL SERVER的用户名和密码进行登录,如:
"Provider=SQLOLEDB.1;Persist Security Info=False;Initial Catalog=数据库名;Data Source=192.168.0.1;User ID=sa;Password=密码"
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Integrated Security - 或 - Trusted_Connection 'false' 当为 false 时,将在连接中指定用户 ID 和密码。当为 true 时,将使用当前的 Windows 帐户凭据进行身份验证。 可识别的值为 true、false、yes、no 以及与 true 等效的 sspi(强烈推荐)。
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ADO.net 中数据库连接方式
System.Data.SqlClient.SqlConnection
常用的一些连接字符串(C#代码):
SqlConnection conn = new SqlConnection( “Server=(local);Integrated Security=SSPI;database=Pubs“);
SqlConnection conn = new SqlConnection(“server=(local)\NetSDK;database=pubs;Integrated Security=SSPI“);
SqlConnection conn = new SqlConnection(“Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;“);
SqlConnection conn = new SqlConnection(“ data source=(local);initial catalog=xr;integrated security=SSPI;
persist security info=False;workstation id=XURUI;packet size=4096; “);
SqlConnection myConn = new System.Data.SqlClient.SqlConnection(“Persist Security Info=False;Integrated
Security=SSPI;database=northwind;server=mySQLServer“);
SqlConnection conn = new SqlConnection( “ uid=sa;pwd=passwords;initial catalog=pubs;data source=127.0.0.1;Connect Timeout=900“);
在与 SQL Server 建立连接时出现与网络相关的或特定于实例的错误。未找到或无法访问服务器。请验证实例名称是否正确并且 SQL Server 已配置为允许远程连接。 (provider: 命名管道提供程序, error: 40 - 无法打开到 SQL Server 的连接)
如果你的机器装了sql2000 那Data Source=.肯定是不行的了
因为实例名2000和2005的默认的是一样的 所以2005的实例肯定不能用Data Source=.表示
查看sql2005的实例名 将Data Source=.\SQLEXPRESS 中的 SQLEXPRESS用你的新实例名替换掉。
我装的是SQL Server 2005 EXPRESS 即VS2008自带的数据库,所以将Data Source写为:
Data Source=.\SQLEXPRESS即可.SQL2000之前用的.号不能在2005上使用.
今天还遇到一个问题,就是SQL 2005 EXPRESS 启用SA账号的问题.搞了半天不能用,尽管已经将SA启用,但是依然登陆不上,后来,将身份验证设置为SQL+Windows验证模式,才能在SQL Server Management Studio Express上登录.
VS2008其实已经自带了数据库,以及数据库驱动了,平时的开发调试完全可以用这个玩.只是没有数据库管理工具,所以无法建表,其实微软提供了免费的管理工具:
安装微软的SQL Server Management Studio Express就可以操作数据库了.
下载
启用SA方法如下,开启MSE,用windows验证登陆,
这样就能用SA来登录啦,当然可以自己修改密码.
数据库一打开,.NET能够连上数据库,进行正常的数据存取,那么之后的开发就容易多啦.
本文永久更新链接地址:

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