SqlConnectionStringBuilder.Item[String] Property

Definition

Namespace:

Microsoft.Data.SqlClient

Assembly:

Microsoft.Data.SqlClient.dll

Package:

Microsoft.Data.SqlClient v5.2.0

Gets or sets the value associated with the specified key. In C#, this property is the indexer.

public:
 virtual property System::Object ^ default[System::String ^] { System::Object ^ get(System::String ^ keyword); void set(System::String ^ keyword, System::Object ^ value); };

public override object this[string keyword] { get; set; }

member this.Item(string) : obj with get, set

Default Public Overrides Property Item(keyword As String) As Object

Parameters

keyword

String

The key of the item to get or set.

Property Value

Object

The value associated with the specified key.

Exceptions

ArgumentNullException

keyword is a null reference (Nothing in Visual Basic).

KeyNotFoundException

Tried to add a key that does not exist within the available keys.

FormatException

Invalid value within the connection string (specifically, a Boolean or numeric value was expected but not supplied).

Examples

The following code, in a console application, creates a new SqlConnectionStringBuilder and adds key/value pairs to its connection string, using the Item[] property.

using Microsoft.Data.SqlClient;

class Program
{
    static void Main()
    {
        SqlConnectionStringBuilder builder =
            new SqlConnectionStringBuilder();
        builder["Data Source"] = "(local)";
        builder["Integrated Security"] = true;
        builder["Initial Catalog"] = "AdventureWorks";

        // Overwrite the existing value for the Data Source value.
        builder["Data Source"] = ".";

        Console.WriteLine(builder.ConnectionString);
        Console.WriteLine();
        Console.WriteLine("Press Enter to continue.");
        Console.ReadLine();
    }
}

Remarks

Because the SqlConnectionStringBuilder contains a fixed-size dictionary, trying to add a key that does not exist within the dictionary throws a KeyNotFoundException.