SqlConnectionStringBuilder.InitialCatalog Property


Gets or sets the name of the database associated with the connection.

Namespace:   System.Data.SqlClient
Assembly:  System.Data (in System.Data.dll)

public string InitialCatalog { get; set; }

Property Value

Type: System.String

The value of the InitialCatalog property, or String.Empty if none has been supplied.

Exception Condition

To set the value to null, use Value.

This property corresponds to the "Initial Catalog" and "database" keys within the connection string.

The following example creates a simple connection string and then uses the SqlConnectionStringBuilder class to add the name of the database to the connection string. The code displays the contents of the InitialCatalog property, just to verify that the class was able to convert from the synonym ("Database") to the appropriate property value.

using System.Data.SqlClient;

class Program
    static void Main()
            string connectString = "Data Source=(local);" +
                "Integrated Security=true";

            SqlConnectionStringBuilder builder = 
                new SqlConnectionStringBuilder(connectString);
            Console.WriteLine("Original: " + builder.ConnectionString);

            // Normally, you could simply set the InitialCatalog
            // property of the SqlConnectionStringBuilder object. This
            // example uses the default Item property (the C# indexer)
            // and the "Database" string, simply to demonstrate that
            // setting the value in this way results in the same
            // connection string:
            builder["Database"] = "AdventureWorks";
            Console.WriteLine("builder.InitialCatalog = " 
                + builder.InitialCatalog);
            Console.WriteLine("Modified: " + builder.ConnectionString);

            using (SqlConnection connection = 
                new SqlConnection(builder.ConnectionString))
                // Now use the open connection.
                Console.WriteLine("Database = " + connection.Database);

        catch (Exception ex)

        Console.WriteLine("Press any key to finish.");

.NET Framework
Available since 2.0
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