sql 2012 express and vs2012

Question

How can I connect Visual Studio 2012 to SQL Server 2012 express on localhost. My server name :

HACEGAN\SQLEXPRESS

what must I write to my connection string ie

 SqlConnection con = new SqlConnection("Data Source=localhost\\HACEGAN.SQLEXPRESS;Initial Catalog=Register;User ID=sa;Password=123");

Answer 1

Just write your server name to your Data Source part ?

Data Source=HACEGAN\SQLEXPRESS;Initial Catalog=Register;User ID=sa;Password=123

Change your

localhost\\HACEGAN.SQLEXPRESS

to

HACEGAN\SQLEXPRESS

Check out: Visual Studio 2012 and MS Sql Server 2012 - connect with Server Explorer

You can find Server Explorer in Visual Studio 2012 -> View -> Server Explorer

Answer 2

我想你直接写

Data Source=HACEGAN\\SQLEXPRESS;Initial Catalog=Register;User ID=xxx;Password=xxx

Answer 3

You shouldn't be specifying both a servername & localhost. One or the other.

 SqlConnection con = new SqlConnection(@"Data Source=HACEGAN\SQLEXPRESS;Initial Catalog=Register;User ID=sa;Password=123");

Please note the @ symbol to prevent escaping issues.

Answer 4

If your sql server is also a default instance, you can use . notation:

Server=.;Database=Register;User Id=sa;Password=123;

If non-default, use .\\SQLExpress .

Answer 5

这篇文章中的所有其他答案都是正确的，但是对于您而言，您应该写：

SqlConnection con = new SqlConnection("Data Source=HACEGAN\\SQLEXPRESS;Initial Catalog=Register;User ID=sa;Password=123");