SqlCeConnection.FlushFailure イベントとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

SqlCeConnection.FlushFailure イベント

バックグラウンドでのフラッシュが失敗した場合に発生します。

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

Visual Basic (宣言)

Public Event FlushFailure As
 SqlCeFlushFailureEventHandler

Visual Basic (使用法)

Dim instance As SqlCeConnection
Dim handler As SqlCeFlushFailureEventHandler

AddHandler instance.FlushFailure, handler

public event SqlCeFlushFailureEventHandler FlushFailure

C++

public:
event SqlCeFlushFailureEventHandler^ FlushFailure {
    void add (SqlCeFlushFailureEventHandler^ value);
    void remove (SqlCeFlushFailureEventHandler^ value);
}

/** @event */
public void add_FlushFailure (SqlCeFlushFailureEventHandler
 value)

/** @event */
public void remove_FlushFailure (SqlCeFlushFailureEventHandler
 value)

JScript

JScript では、イベントは使用できますが、新規に宣言することはできません。

使用例

FlushFailure イベントを使用する方法の例を次に示します。

Visual Basic

Public Sub Snippet4()
    Dim conn As SqlCeConnection = Nothing

    Try
        conn = New SqlCeConnection("Data Source = MyDatabase.sdf;
 Password ='<pwd>'")
        
        AddHandler conn.FlushFailure, AddressOf
 conn_FlushFailure
       
        conn.Open()
        
        'Flush failure occurs here
        'OnFlushFailure will be called from the background thread.
       
       
    Finally
        conn.Close()
    End Try
    
End Sub

Private Sub conn_FlushFailure(ByVal
 sender As System.Object, ByVal e As
 SqlCeFlushFailureEventArgs)
    
    Dim errors As SqlCeErrorCollection = e.Errors
    Console.WriteLine("Flush Failure: " + errors(0).Message)
    
End Sub

// using System;
// using System.Xml;
// using System.Data;
// using System.Data.SqlServerCe;
// using System.Data.Common;
// using System.Windows.Forms;
/// <summary>
/// Demonstrates the usage of the FlushFailure event
/// </summary>
public class MyForm : Form
{
    public void Snippet4()
    {
                
        SqlCeConnection conn = new SqlCeConnection();
        
        conn.FlushFailure+=new SqlCeFlushFailureEventHandler(conn_FlushFailure);

        conn.Open();
        
        //Flush failure occurs here
        //OnFlushFailure will be called from the background thread.
 
        conn.Close();        
    }
    void conn_FlushFailure(object sender, SqlCeFlushFailureEventArgs
 e)
    {
        SqlCeErrorCollection errors = e.Errors;
        Console.WriteLine("Flush Failure:" + errors[0].Message);
    }
}