SqlCeConnection.CreateCommand Method

SqlCeConnection に関連付けられている SqlCeCommand オブジェクトを作成し、返します。

名前空間: System.Data.SqlServerCe
アセンブリ: System.Data.SqlServerCe (system.data.sqlserverce.dll 内)

構文

'宣言
Public Function CreateCommand As SqlCeCommand

public SqlCeCommand CreateCommand ()

public:
SqlCeCommand^ CreateCommand ()

public SqlCeCommand CreateCommand ()

public function CreateCommand () : SqlCeCommand

戻り値

SqlCeCommand オブジェクト。

例

CreateCommand メソッドを使用して、SqlCeCommand オブジェクトを作成する方法の例を次に示します。

Dim conn As New SqlCeConnection("Data Source = MyDatabase.sdf; Password ='<pwd>'")
conn.Open()

' Start a local transaction
'
Dim tx As SqlCeTransaction = conn.BeginTransaction()

' By default, commands run in auto-commit mode; 
'
Dim cmd1 As SqlCeCommand = conn.CreateCommand()

' You may create multiple commands on the same connection
'
Dim cmd2 As SqlCeCommand = conn.CreateCommand()

' To enlist a command in a transaction, set the Transaction property
'
cmd1.Transaction = tx

Try
    cmd1.CommandText = "INSERT INTO Shippers ([Company Name]) VALUES ('Northwind Traders')"
    cmd1.ExecuteNonQuery()

    ' Auto-commited because cmd2 is not enlisted in a transaction
    '
    cmd2.CommandText = "INSERT INTO Employees ([Last Name], [First Name]) VALUES ('Decker', 'Barbara')"
    cmd2.ExecuteNonQuery()

    ' This will cause referential constraint violation
    '
    cmd1.CommandText = "DELETE FROM Products WHERE [Product ID] = 1"
    cmd1.ExecuteNonQuery()

    ' Commit the changes to disk if everything above succeeded
    '
    tx.Commit()
Catch
    tx.Rollback()
Finally
    conn.Close()
End Try

SqlCeConnection conn = new SqlCeConnection("Data Source = MyDatabase.sdf; Password ='<pwd>'");
conn.Open();

// Start a local transaction
//
SqlCeTransaction tx = conn.BeginTransaction();

// By default, commands run in auto-commit mode; 
//
SqlCeCommand cmd1 = conn.CreateCommand();

// You may create multiple commands on the same connection
//
SqlCeCommand cmd2 = conn.CreateCommand();

// To enlist a command in a transaction, set the Transaction property
//
cmd1.Transaction = tx;

try
{
    cmd1.CommandText = "INSERT INTO Shippers ([Company Name]) VALUES ('Northwind Traders')";
    cmd1.ExecuteNonQuery();

    // Auto-commited because cmd2 is not enlisted in a transaction
    //
    cmd2.CommandText = "INSERT INTO Employees ([Last Name], [First Name]) VALUES ('Decker', 'Barbara')";
    cmd2.ExecuteNonQuery();

    // This will cause referential constraint violation
    //
    cmd1.CommandText = "DELETE FROM Products WHERE [Product ID] = 1";
    cmd1.ExecuteNonQuery();

    // Commit the changes to disk if everything above succeeded
    //
    tx.Commit();
}
catch (Exception)
{
    tx.Rollback();
}
finally
{
    conn.Close();
}

スレッド セーフ

この型の public static (Visual Basic では Shared ) メンバはすべて、スレッド セーフです。インスタンス メンバの場合は、スレッド セーフであるとは限りません。

プラットフォーム

開発プラットフォーム

Windows Vista、Windows Mobile 5.0、Windows XP Professional with Service Pack 2 (SP2)、Windows Server 2003、Windows Mobile 2003 for Pocket PC、Windows CE 5.0
バージョン情報
.NET Framework および .NET Compact Framework
3.5 でサポート
.NET Framework
3.0 でサポート
.NET Compact Framework および .Net Framework
2.0 でサポート

参照

リファレンス

SqlCeConnection Class
SqlCeConnection Members
System.Data.SqlServerCe Namespace