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IDbConnection.ConnectionString Property

Gets or sets the string used to open a database.

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

string ConnectionString { get; set; }

Property Value

Type: System.String
A string containing connection settings.

The ConnectionString property can be set only while the connection is closed.

The following example creates an instance of a derived class, OleDbConnection, sets its ConnectionString, and displays its State.

public void CreateOleDbConnection(){
   OleDbConnection connection = new OleDbConnection();
   connection.ConnectionString = 
       "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Northwind.mdb";
   Console.WriteLine("Connection State: " + connection.State.ToString());
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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