SqlCommand.Parameters Property

Definition

Namespace:

System.Data.SqlClient

Assembly:

System.Data.SqlClient.dll

Package:

System.Data.SqlClient v4.9.0

Source:

System.Data.SqlClient.notsupported.cs

Gets the SqlParameterCollection.

C#

public System.Data.SqlClient.SqlParameterCollection Parameters { get; }

Property Value

SqlParameterCollection

The parameters of the Transact-SQL statement or stored procedure. The default is an empty collection.

Examples

The following example demonstrates how to create a SqlCommand and add parameters to the SqlParameterCollection.

C#

private static void UpdateDemographics(Int32 customerID,
    string demoXml, string connectionString)
{
    // Update the demographics for a store, which is stored
    // in an xml column.
    string commandText = "UPDATE Sales.Store SET Demographics = @demographics "
        + "WHERE CustomerID = @ID;";

    using (SqlConnection connection = new SqlConnection(connectionString))
    {
        SqlCommand command = new SqlCommand(commandText, connection);
        command.Parameters.Add("@ID", SqlDbType.Int);
        command.Parameters["@ID"].Value = customerID;

        // Use AddWithValue to assign Demographics.
        // SQL Server will implicitly convert strings into XML.
        command.Parameters.AddWithValue("@demographics", demoXml);

        try
        {
            connection.Open();
            Int32 rowsAffected = command.ExecuteNonQuery();
            Console.WriteLine("RowsAffected: {0}", rowsAffected);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
}

Remarks

The Microsoft .NET Framework Data Provider for SQL Server does not support the question mark (?) placeholder for passing parameters to a SQL Statement or a stored procedure called by a command of CommandType.Text. In this case, named parameters must be used. For example:

SELECT * FROM Customers WHERE CustomerID = @CustomerID

Note

If the parameters in the collection do not match the requirements of the query to be executed, an error may result.

For more information, see Configuring Parameters and Parameter Data Types.

Applies to

See also

• Connecting and Retrieving Data in ADO.NET
• Using the .NET Framework Data Provider for SQL Server
• ADO.NET Overview