SqlCommand marshal by reference, disposable

SqlCommand

marshal by reference, disposable

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System.Data.SqlClient (system.data.dll)

sealed class

This class represents a Transact -SQL command or stored procedure that can be executed against a SQL Server data source. For information about the basic SqlCommand methods and properties, refer to the reference for the System.Data.IDbCommand interface, which SqlCommand implements. SqlCommand errors result in a SqlException being thrown.

The order of parameters isn't important with the SqlCommand when you create a parameterized query or stored procedure. To create a parameterized query, set CommandType to System.Data.CommandType.Text and name all parameters. For example, you can set the CommandText to:

 SELECT * FROM Customers WHERE CustomerID = @CustomerID 

to specify that a CustomerID value will be supplied as a parameter with the name @CustomerID .

The SqlCommand class also adds an ExecuteXmlReader( ) method, which executes a SELECT query that uses the FOR XML clause to return the results in an XML document. You can access the nodes of this document in a forward-only, node-by-node basis using the System.Xml.XmlReader instance that ExecuteXmlReader( ) returns. For more information about the FOR XML clause, refer to Chapter 17 or SQL Server 2000 Books Online.

 public sealed class  SqlCommand  : System.ComponentModel.Component , System.Data.IDbCommand, ICloneable {  // Public Constructors  public  SqlCommand  (  );      public  SqlCommand  ( string   cmdText   );      public  SqlCommand  (string   cmdText   , SqlConnection   connection   );    public  SqlCommand  (string   cmdText   , SqlConnection   connection   , SqlTransaction   transaction   );  // Public Instance Properties  public string  CommandText  {set; get; }  // implements System.Data.IDbCommand  public int  CommandTimeout  {set; get; }  // implements System.Data.IDbCommand  public CommandType  CommandType  {set; get; }  // implements System.Data.IDbCommand  public SqlConnection  Connection  {set; get; }     public bool  DesignTimeVisible  {set; get; }     public SqlParameterCollection  Parameters  {get; }     public SqlTransaction  Transaction  {set; get; }     public UpdateRowSource  UpdatedRowSource  {set; get; }  // implements System.Data.IDbCommand   // Public Instance Methods  public void  Cancel  (  );  // implements System.Data.IDbCommand  public SqlParameter  CreateParameter  (  );      public int  ExecuteNonQuery  (  );  // implements System.Data.IDbCommand  public SqlDataReader  ExecuteReader  (  );      public SqlDataReader  ExecuteReader  (System.Data.CommandBehavior   behavior   );    public object  ExecuteScalar  (  );  // implements System.Data.IDbCommand  public XmlReader  ExecuteXmlReader  (  );      public void  Prepare  (  );  // implements System.Data.IDbCommand  public void  ResetCommandTimeout  (  );   } 

Hierarchy

System.Object System.MarshalByRefObject System.ComponentModel.Component(System.ComponentModel.IComponent, System.IDisposable) SqlCommand(System.Data.IDbCommand, System.ICloneable)

Returned By

SqlCommandBuilder.{GetDeleteCommand( ) , GetInsertCommand( ) , GetUpdateCommand() , SqlConnection.CreateCommand( ) , SqlDataAdapter.{DeleteCommand , InsertCommand , SelectCommand , UpdateCommand} , SqlRowUpdatedEventArgs.Command , SqlRowUpdatingEventArgs.Command

Passed To

SqlCommandBuilder.DeriveParameters( ) , SqlDataAdapter.{DeleteCommand , InsertCommand , SelectCommand , SqlDataAdapter( ) , UpdateCommand} , SqlRowUpdatingEventArgs.Command