EditingControl.TextChanged イベントの発生回数を制御する方法
文書番号 : 28416
文書種別 : 使用方法
最終更新日 : 2010/01/15
対象製品
MultiRow for Windows Forms 5.0J
詳細
DataGridViewコントロールとGcMultiRowコントロールでそれぞれセル編集コントロール(EditingControl)のTextChangedイベントを実装したとき、イベントの発生回数が異なります。これは、GcMultiRowコントロールがセル移動時にセル編集コントロールの編集開始位置が常に適正になるように、内部で一度EditingControl.Textプロパティを初期化していることによるものです。
次のコードは、この現象を確認します。
[Visual Basic]
[C#]
この現象を回避し、DataGridViewと同じ回数だけEditingControl.TextChangedイベントを発生させるには、次のようにコードを書き換えます。
[Visual Basic]
[C#]
セルの移動時にEditingControl.TextChangedイベントを発生させず、ユーザーによる編集が行われた場合のみEditingControl.TextChangedイベントを発生させるには、次のように書き換えます。
[Visual Basic]
[C#]
次期バージョン MultiRow for Windows Forms 6.0J では、EditingControl.TextChangedイベントの代わりにGcMultiRow.CellEditedFormattedValueChangedイベントを使用することもできます。
次のコードは、この現象を確認します。
[Visual Basic]
Imports GrapeCity.Win.MultiRow
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
DataGridView1.RowCount = 10
For i As Integer = 0 To DataGridView1.RowCount - 1
DataGridView1.Rows(i).Cells(0).Value = i
Next
Dim textBoxCell = New TextBoxCell()
textBoxCell.Name = "textBoxCell"
GcMultiRow1.Template = Template.CreateGridTemplate(New Cell() {textBoxCell})
GcMultiRow1.RowCount = 10
For i As Integer = 0 To GcMultiRow1.RowCount - 1
GcMultiRow1.SetValue(i, "textBoxCell", i)
Next
End Sub
Private Sub DataGridView1_EditingControlShowing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
If TypeOf DataGridView1.CurrentCell Is DataGridViewTextBoxCell Then
Dim textBox As DataGridViewTextBoxEditingControl = TryCast(e.Control, DataGridViewTextBoxEditingControl)
RemoveHandler textBox.TextChanged, AddressOf dataGridView_textBox_TextChanged
AddHandler textBox.TextChanged, AddressOf dataGridView_textBox_TextChanged
End If
End Sub
Private Sub dataGridView_textBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim textBox As DataGridViewTextBoxEditingControl = TryCast(sender, DataGridViewTextBoxEditingControl)
Console.WriteLine("DataGridView_textBox_TextChanged:{0}", textBox.Text)
End Sub
Private Sub GcMultiRow1_EditingControlShowing(ByVal sender As System.Object, ByVal e As GrapeCity.Win.MultiRow.EditingControlShowingEventArgs) Handles GcMultiRow1.EditingControlShowing
If TypeOf GcMultiRow1.CurrentCell Is TextBoxCell Then
Dim textBox As TextBoxEditingControl = TryCast(e.Control, TextBoxEditingControl)
RemoveHandler textBox.TextChanged, AddressOf gcMultiRow_textBox_TextChanged
AddHandler textBox.TextChanged, AddressOf gcMultiRow_textBox_TextChanged
End If
End Sub
Private Sub gcMultiRow_textBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim textBox As TextBoxEditingControl = TryCast(sender, TextBoxEditingControl)
Console.WriteLine("GcMultiRow_textBox_TextChanged:{0}", textBox.Text)
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
DataGridView1.RowCount = 10
For i As Integer = 0 To DataGridView1.RowCount - 1
DataGridView1.Rows(i).Cells(0).Value = i
Next
Dim textBoxCell = New TextBoxCell()
textBoxCell.Name = "textBoxCell"
GcMultiRow1.Template = Template.CreateGridTemplate(New Cell() {textBoxCell})
GcMultiRow1.RowCount = 10
For i As Integer = 0 To GcMultiRow1.RowCount - 1
GcMultiRow1.SetValue(i, "textBoxCell", i)
Next
End Sub
Private Sub DataGridView1_EditingControlShowing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
If TypeOf DataGridView1.CurrentCell Is DataGridViewTextBoxCell Then
Dim textBox As DataGridViewTextBoxEditingControl = TryCast(e.Control, DataGridViewTextBoxEditingControl)
RemoveHandler textBox.TextChanged, AddressOf dataGridView_textBox_TextChanged
AddHandler textBox.TextChanged, AddressOf dataGridView_textBox_TextChanged
End If
End Sub
Private Sub dataGridView_textBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim textBox As DataGridViewTextBoxEditingControl = TryCast(sender, DataGridViewTextBoxEditingControl)
Console.WriteLine("DataGridView_textBox_TextChanged:{0}", textBox.Text)
End Sub
Private Sub GcMultiRow1_EditingControlShowing(ByVal sender As System.Object, ByVal e As GrapeCity.Win.MultiRow.EditingControlShowingEventArgs) Handles GcMultiRow1.EditingControlShowing
If TypeOf GcMultiRow1.CurrentCell Is TextBoxCell Then
Dim textBox As TextBoxEditingControl = TryCast(e.Control, TextBoxEditingControl)
RemoveHandler textBox.TextChanged, AddressOf gcMultiRow_textBox_TextChanged
AddHandler textBox.TextChanged, AddressOf gcMultiRow_textBox_TextChanged
End If
End Sub
Private Sub gcMultiRow_textBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim textBox As TextBoxEditingControl = TryCast(sender, TextBoxEditingControl)
Console.WriteLine("GcMultiRow_textBox_TextChanged:{0}", textBox.Text)
End Sub
[C#]
using GrapeCity.Win.MultiRow;
private void Form1_Load(object sender, EventArgs e)
{
dataGridView1.RowCount = 10;
for (int i = 0; i < dataGridView1.RowCount; i++)
{
dataGridView1.Rows[i].Cells[0].Value = i;
}
dataGridView1.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(dataGridView1_EditingControlShowing);
TextBoxCell textBoxCell = new TextBoxCell();
textBoxCell.Name = "textBoxCell";
gcMultiRow1.Template = Template.CreateGridTemplate(new Cell[] { textBoxCell });
gcMultiRow1.RowCount = 10;
for (int i = 0; i < gcMultiRow1.RowCount; i++)
{
gcMultiRow1.SetValue(i, "textBoxCell", i);
}
gcMultiRow1.EditingControlShowing += new EventHandler<GrapeCity.Win.MultiRow.EditingControlShowingEventArgs>(gcMultiRow1_EditingControlShowing);
}
private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
if (dataGridView1.CurrentCell is DataGridViewTextBoxCell)
{
DataGridViewTextBoxEditingControl textBox = e.Control as DataGridViewTextBoxEditingControl;
textBox.TextChanged -= new EventHandler(dataGridView_textBox_TextChanged);
textBox.TextChanged += new EventHandler(dataGridView_textBox_TextChanged);
}
}
private void dataGridView_textBox_TextChanged(object sender, EventArgs e)
{
DataGridViewTextBoxEditingControl textBox = sender as DataGridViewTextBoxEditingControl;
Console.WriteLine("DataGridView_textBox_TextChanged:{0}", textBox.Text);
}
private void gcMultiRow1_EditingControlShowing(object sender, EditingControlShowingEventArgs e)
{
if (gcMultiRow1.CurrentCell is TextBoxCell)
{
TextBoxEditingControl textBox = e.Control as TextBoxEditingControl;
textBox.TextChanged -= new EventHandler(gcMultiRow_textBox_TextChanged);
textBox.TextChanged += new EventHandler(gcMultiRow_textBox_TextChanged);
}
}
private void gcMultiRow_textBox_TextChanged(object sender, EventArgs e)
{
TextBoxEditingControl textBox = sender as TextBoxEditingControl;
Console.WriteLine("GcMultiRow_textBox_TextChanged:{0}", textBox.Text);
}
private void Form1_Load(object sender, EventArgs e)
{
dataGridView1.RowCount = 10;
for (int i = 0; i < dataGridView1.RowCount; i++)
{
dataGridView1.Rows[i].Cells[0].Value = i;
}
dataGridView1.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(dataGridView1_EditingControlShowing);
TextBoxCell textBoxCell = new TextBoxCell();
textBoxCell.Name = "textBoxCell";
gcMultiRow1.Template = Template.CreateGridTemplate(new Cell[] { textBoxCell });
gcMultiRow1.RowCount = 10;
for (int i = 0; i < gcMultiRow1.RowCount; i++)
{
gcMultiRow1.SetValue(i, "textBoxCell", i);
}
gcMultiRow1.EditingControlShowing += new EventHandler<GrapeCity.Win.MultiRow.EditingControlShowingEventArgs>(gcMultiRow1_EditingControlShowing);
}
private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
if (dataGridView1.CurrentCell is DataGridViewTextBoxCell)
{
DataGridViewTextBoxEditingControl textBox = e.Control as DataGridViewTextBoxEditingControl;
textBox.TextChanged -= new EventHandler(dataGridView_textBox_TextChanged);
textBox.TextChanged += new EventHandler(dataGridView_textBox_TextChanged);
}
}
private void dataGridView_textBox_TextChanged(object sender, EventArgs e)
{
DataGridViewTextBoxEditingControl textBox = sender as DataGridViewTextBoxEditingControl;
Console.WriteLine("DataGridView_textBox_TextChanged:{0}", textBox.Text);
}
private void gcMultiRow1_EditingControlShowing(object sender, EditingControlShowingEventArgs e)
{
if (gcMultiRow1.CurrentCell is TextBoxCell)
{
TextBoxEditingControl textBox = e.Control as TextBoxEditingControl;
textBox.TextChanged -= new EventHandler(gcMultiRow_textBox_TextChanged);
textBox.TextChanged += new EventHandler(gcMultiRow_textBox_TextChanged);
}
}
private void gcMultiRow_textBox_TextChanged(object sender, EventArgs e)
{
TextBoxEditingControl textBox = sender as TextBoxEditingControl;
Console.WriteLine("GcMultiRow_textBox_TextChanged:{0}", textBox.Text);
}
この現象を回避し、DataGridViewと同じ回数だけEditingControl.TextChangedイベントを発生させるには、次のようにコードを書き換えます。
[Visual Basic]
Private editingControlRemoving As Boolean = False
Private Sub GcMultiRow1_ControlRemoved(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ControlEventArgs) Handles GcMultiRow1.ControlRemoved
If e.Control Is GcMultiRow1.EditingPanel Then
editingControlRemoving = True
GcMultiRow1.EditingControl.Text = String.Empty
editingControlRemoving = False
End If
End Sub
Private Sub gcMultiRow_textBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim textBox As TextBoxEditingControl = TryCast(sender, TextBoxEditingControl)
If Not editingControlRemoving Then
Console.WriteLine("GcMultiRow_textBox_TextChanged:{0}", textBox.Text)
End If
End Sub
Private Sub GcMultiRow1_ControlRemoved(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ControlEventArgs) Handles GcMultiRow1.ControlRemoved
If e.Control Is GcMultiRow1.EditingPanel Then
editingControlRemoving = True
GcMultiRow1.EditingControl.Text = String.Empty
editingControlRemoving = False
End If
End Sub
Private Sub gcMultiRow_textBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim textBox As TextBoxEditingControl = TryCast(sender, TextBoxEditingControl)
If Not editingControlRemoving Then
Console.WriteLine("GcMultiRow_textBox_TextChanged:{0}", textBox.Text)
End If
End Sub
[C#]
private void Form1_Load(object sender, EventArgs e)
{
...
// 以下のコードを追加
gcMultiRow1.ControlRemoved += new ControlEventHandler(gcMultiRow1_ControlRemoved);
}
bool editingControlRemoving = false;
private void gcMultiRow1_ControlRemoved(object sender, ControlEventArgs e)
{
if (e.Control == gcMultiRow1.EditingPanel)
{
editingControlRemoving = true;
gcMultiRow1.EditingControl.Text = string.Empty;
editingControlRemoving = false;
}
}
private void gcMultiRow_textBox_TextChanged(object sender, EventArgs e)
{
TextBoxEditingControl textBox = sender as TextBoxEditingControl;
if (!editingControlRemoving)
{
Console.WriteLine("gcMultiRow_textBox_TextChanged:{0}", textBox.Text);
}
}
{
...
// 以下のコードを追加
gcMultiRow1.ControlRemoved += new ControlEventHandler(gcMultiRow1_ControlRemoved);
}
bool editingControlRemoving = false;
private void gcMultiRow1_ControlRemoved(object sender, ControlEventArgs e)
{
if (e.Control == gcMultiRow1.EditingPanel)
{
editingControlRemoving = true;
gcMultiRow1.EditingControl.Text = string.Empty;
editingControlRemoving = false;
}
}
private void gcMultiRow_textBox_TextChanged(object sender, EventArgs e)
{
TextBoxEditingControl textBox = sender as TextBoxEditingControl;
if (!editingControlRemoving)
{
Console.WriteLine("gcMultiRow_textBox_TextChanged:{0}", textBox.Text);
}
}
セルの移動時にEditingControl.TextChangedイベントを発生させず、ユーザーによる編集が行われた場合のみEditingControl.TextChangedイベントを発生させるには、次のように書き換えます。
[Visual Basic]
Private _currentCellPosition As CellPosition = CellPosition.Empty
Private Sub GcMultiRow1_EditingControlShowing(ByVal sender As System.Object, ByVal e As GrapeCity.Win.MultiRow.EditingControlShowingEventArgs) Handles GcMultiRow1.EditingControlShowing
If TypeOf GcMultiRow1.CurrentCell Is TextBoxCell Then
_currentCellPosition = GcMultiRow1.CurrentCellPosition
Dim textBox As TextBoxEditingControl = TryCast(e.Control, TextBoxEditingControl)
RemoveHandler textBox.TextChanged, AddressOf gcMultiRow_textBox_TextChanged
AddHandler textBox.TextChanged, AddressOf gcMultiRow_textBox_TextChanged
End If
End Sub
Private Sub gcMultiRow_textBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim textBox As TextBoxEditingControl = TryCast(sender, TextBoxEditingControl)
If textBox.GcMultiRow.CurrentCellPosition.Equals(_currentCellPosition) Then
Console.WriteLine("GcMultiRow_textBox_TextChanged:{0}", textBox.Text)
End If
End Sub
Private Sub GcMultiRow1_EditingControlShowing(ByVal sender As System.Object, ByVal e As GrapeCity.Win.MultiRow.EditingControlShowingEventArgs) Handles GcMultiRow1.EditingControlShowing
If TypeOf GcMultiRow1.CurrentCell Is TextBoxCell Then
_currentCellPosition = GcMultiRow1.CurrentCellPosition
Dim textBox As TextBoxEditingControl = TryCast(e.Control, TextBoxEditingControl)
RemoveHandler textBox.TextChanged, AddressOf gcMultiRow_textBox_TextChanged
AddHandler textBox.TextChanged, AddressOf gcMultiRow_textBox_TextChanged
End If
End Sub
Private Sub gcMultiRow_textBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim textBox As TextBoxEditingControl = TryCast(sender, TextBoxEditingControl)
If textBox.GcMultiRow.CurrentCellPosition.Equals(_currentCellPosition) Then
Console.WriteLine("GcMultiRow_textBox_TextChanged:{0}", textBox.Text)
End If
End Sub
[C#]
private CellPosition _currentCellPosition = CellPosition.Empty;
private void gcMultiRow1_EditingControlShowing(object sender, EditingControlShowingEventArgs e)
{
if (gcMultiRow1.CurrentCell is TextBoxCell)
{
_currentCellPosition = gcMultiRow1.CurrentCellPosition;
TextBoxEditingControl textBox = e.Control as TextBoxEditingControl;
textBox.TextChanged -= new EventHandler(gcMultiRow_textBox_TextChanged);
textBox.TextChanged += new EventHandler(gcMultiRow_textBox_TextChanged);
}
}
private void gcMultiRow_textBox_TextChanged(object sender, EventArgs e)
{
TextBoxEditingControl textBox = sender as TextBoxEditingControl;
if (textBox.GcMultiRow.CurrentCellPosition.Equals(_currentCellPosition))
{
Console.WriteLine("gcMultiRow_textBox_TextChanged:{0}", textBox.Text);
}
}
private void gcMultiRow1_EditingControlShowing(object sender, EditingControlShowingEventArgs e)
{
if (gcMultiRow1.CurrentCell is TextBoxCell)
{
_currentCellPosition = gcMultiRow1.CurrentCellPosition;
TextBoxEditingControl textBox = e.Control as TextBoxEditingControl;
textBox.TextChanged -= new EventHandler(gcMultiRow_textBox_TextChanged);
textBox.TextChanged += new EventHandler(gcMultiRow_textBox_TextChanged);
}
}
private void gcMultiRow_textBox_TextChanged(object sender, EventArgs e)
{
TextBoxEditingControl textBox = sender as TextBoxEditingControl;
if (textBox.GcMultiRow.CurrentCellPosition.Equals(_currentCellPosition))
{
Console.WriteLine("gcMultiRow_textBox_TextChanged:{0}", textBox.Text);
}
}
次期バージョン MultiRow for Windows Forms 6.0J では、EditingControl.TextChangedイベントの代わりにGcMultiRow.CellEditedFormattedValueChangedイベントを使用することもできます。
この文書は、以前は次のFAQ IDで公開されていました : 12771