How we get local SQL Server instance through c#

Question

I am creating a Windows app in which I need to create a connection string automatically. I create a Windows form similar to SQL Server Management Studio Connect to server form. For this I need few things

1. local SQL server Name of the system.

2. After user fill the form like select server Name and authentication type then i need to check that that filled details are correct.

3. I need to create automatic connection string in c# and create automatic database and for this I execute SQL query in c# code that are working fine.

So help me get the instance name and check the data is valid in C# window application.

Answer 1

To get all instances of local network (and local) you can use this code: (from MSDN)

SqlDataSourceEnumerator instance = SqlDataSourceEnumerator.Instance;
System.Data.DataTable table = instance.GetDataSources();

And to test connection string you can simply open a connection with generated connection string. like this: (from this answer)

string provider = "System.Data.SqlClient"; // for example
DbProviderFactory factory = DbProviderFactories.GetFactory(provider);
using(DbConnection conn = factory.CreateConnection()) {
    conn.ConnectionString = cs;
    conn.Open();
}