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SqlDataAdapter Constructor (String, String)

Initializes a new instance of the SqlDataAdapter class with a SelectCommand and a connection string.

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

public SqlDataAdapter(
	string selectCommandText,
	string selectConnectionString


Type: System.String

A String that is a Transact-SQL SELECT statement or stored procedure to be used by the SelectCommand property of the SqlDataAdapter.

Type: System.String

The connection string. If your connection string does not use Integrated Security = true, you can use SqlDataAdapter and SqlCredential to pass the user ID and password more securely than by specifying the user ID and password as text in the connection string.

This overload of the SqlDataAdapter constructor uses the selectCommandText parameter to set the SelectCommand property. The SqlDataAdapter will create and maintain the connection created with the selectConnectionString parameter.

When an instance of SqlDataAdapter is created, the following read/write properties are set to the following initial values.


Initial value





You can change the value of any of these properties through a separate call to the property.

The following example creates a SqlDataAdapter and sets some of its properties.

public static SqlDataAdapter CreateSqlDataAdapter(string commandText,
    string connectionString)
    SqlDataAdapter adapter = new SqlDataAdapter(commandText, connectionString);
    SqlConnection connection = adapter.SelectCommand.Connection;

    adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;

    // Create the commands.
    adapter.InsertCommand = new SqlCommand(
        "INSERT INTO Customers (CustomerID, CompanyName) " +
        "VALUES (@CustomerID, @CompanyName)", connection);

    adapter.UpdateCommand = new SqlCommand(
        "UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName " +
        "WHERE CustomerID = @oldCustomerID", connection);

    adapter.DeleteCommand = new SqlCommand(
        "DELETE FROM Customers WHERE CustomerID = @CustomerID", connection);

    // Create the parameters.
        SqlDbType.Char, 5, "CustomerID");
        SqlDbType.VarChar, 40, "CompanyName");

        SqlDbType.Char, 5, "CustomerID");
        SqlDbType.VarChar, 40, "CompanyName");
        SqlDbType.Char, 5, "CustomerID").SourceVersion = DataRowVersion.Original;

        SqlDbType.Char, 5, "CustomerID").SourceVersion = DataRowVersion.Original;

    return adapter;

.NET Framework

Supported in: 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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