Keypressイベントでのみ特定の列の数値のみを受け入れるdatagridviewを作成する必要があります。これを行う最良の方法はありますか?
例:
private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
e.Control.KeyPress -= new KeyPressEventHandler(Column1_KeyPress);
if (dataGridView1.CurrentCell.ColumnIndex == 0) //Desired Column
{
TextBox tb = e.Control as TextBox;
if (tb != null)
{
tb.KeyPress += new KeyPressEventHandler(Column1_KeyPress);
}
}
}
private void Column1_KeyPress(object sender, KeyPressEventArgs e)
{
if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar))
{
e.Handled = true;
}
}
DataGridView.CellValidating Event を次のように使用する必要があります。
private void dataGridView1_CellValidating(object sender,
DataGridViewCellValidatingEventArgs e)
{
if (e.ColumnIndex == 1) // 1 should be your column index
{
int i;
if (!int.TryParse(Convert.ToString(e.FormattedValue), out i))
{
e.Cancel = true;
label1.Text ="please enter numeric";
}
else
{
// the input is numeric
}
}
}
private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
e.Control.KeyPress -= new KeyPressEventHandler(Column1_KeyPress);
if (dataGridView1.CurrentCell.ColumnIndex == 4) //Desired Column
{
TextBox tb = e.Control as TextBox;
if (tb != null)
{
tb.KeyPress += new KeyPressEventHandler(Column1_KeyPress);
}
}
}
private void Column1_KeyPress(object sender, KeyPressEventArgs e)
{
// allowed only numeric value ex.10
//if (!char.IsControl(e.KeyChar)
// && !char.IsDigit(e.KeyChar))
//{
// e.Handled = true;
//}
// allowed numeric and one dot ex. 10.23
if (!char.IsControl(e.KeyChar)&& !char.IsDigit(e.KeyChar)
&& e.KeyChar != '.')
{
e.Handled = true;
}
// only allow one decimal point
if (e.KeyChar == '.'
&& (sender as TextBox).Text.IndexOf('.') > -1)
{
e.Handled = true;
}
}
他の人が指摘しているように小数点以下の桁数を必要としない限り、与えられた答えは素晴らしいです。このイベントでは、検証を拡張する必要があります。以下を使用してvarsを追加し、小数点記号のカルチャ変数値を取得します
using System.Globalization;
NumberFormatInfo nfi = Thread.CurrentThread.CurrentCulture.NumberFormat;
char decSeperator;
decSeperator = nfi.CurrencyDecimalSeparator[0];
検証を以下に拡張します。
if (!char.IsControl(e.KeyChar) && !(char.IsDigit(e.KeyChar)
| e.KeyChar == decSeperator))
{
e.Handled = true;
}
// only allow one decimal point
if (e.KeyChar == decSeperator
&& (sender as TextBox).Text.IndexOf(decSeperator) > -1)
{
e.Handled = true;
}
Private WithEvents txtNumeric As New DataGridViewTextBoxEditingControl
Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
txtNumeric = CType(e.Control, DataGridViewTextBoxEditingControl)
End Sub
Private Sub txtNumeric_KeyPress(sender As Object, e As KeyPressEventArgs) Handles txtNumeric.KeyPress
If (DataGridView1.CurrentCell.ColumnIndex > 0) Then
If (Not Char.IsControl(e.KeyChar) And Not Char.IsDigit(e.KeyChar) And Not e.KeyChar = ".") Then
e.Handled = True
Else
'only allow one decimal point
If (e.KeyChar = "." And txtNumeric.Text.Contains(".")) Then
e.Handled = True
End If
End If
End If
End Sub
小数点文字を受け入れて、この方法を試すこともできます
private void Column1_KeyPress(object sender, KeyPressEventArgs e)
{
//allow number, backspace and dot
if (!(char.IsDigit(e.KeyChar) || e.KeyChar == (char)Keys.Back || e.KeyChar == '.'))
{
e.Handled = true;
}
//allow only one dot
if (e.KeyChar == '.' && (sender as TextBox).Text.Contains("."))
{
e.Handled = true;
}
}