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[英]Allow only {'delete' , 'backspace' , one '.' , '-' , numbers '0 to 9'} on a textbox C#/winforms
[英]DatagridView Event To allow Numbers, Backspace & Delete Keys Only VB.Net
如何更改以下代碼以接受刪除和退格鍵??
Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
Select Case DataGridView1.CurrentCell.ColumnIndex
Case Is = 0, 1
AddHandler CType(e.Control, TextBox).KeyPress, AddressOf TextBox_keyPress
End Select
End Sub
Private Sub TextBox_keyPress(ByVal sender As Object, ByVal e As KeyPressEventArgs)
If Not (Char.IsDigit(CChar(CStr(e.KeyChar))) Or e.KeyChar = ".") Then
e.Handled = True
End If
End Sub
修改后的當前代碼- 不工作
Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
Select Case DataGridView1.CurrentCell.ColumnIndex
Case Is = 0, 1
AddHandler CType(e.Control, TextBox).KeyPress, AddressOf TextBox_keyDown
End Select
End Sub
Private Sub TextBox_keyDown(ByVal sender As Object, ByVal e As KeyPressEventArgs)
If Not (Char.IsDigit(CChar(CStr(e.KeyChar))) Or e.KeyChar = ".") Then
e.Handled = True
End If
End Sub
編輯 - 2 代碼
Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
Select Case DataGridView1.CurrentCell.ColumnIndex
Case Is = 0, 1
AddHandler CType(e.Control, TextBox).KeyPress, AddressOf TextBox_keyDown
End Select
End Sub
Private Sub TextBox_keyDown(ByVal sender As Object, ByVal e As KeyEventArgs)
If Not (Char.IsDigit(CChar(CStr(e.KeyValue))) Or e.KeyValue = ".") Then
e.Handled = True
End If
End Sub
現在在 TextBox_keyDown Word 中出現錯誤這一行...
AddressOf TextBox_keyDown
錯誤文本
嚴重性代碼描述項目文件行抑制狀態錯誤 BC31143 方法“Private Sub TextBox_keyDown(sender As Object,e As KeyEventArgs)”沒有與委托“Delegate Sub KeyPressEventHandler(sender As Object,e As KeyPressEventArgs)”兼容的簽名。
將 DataGridview EditMode屬性更改為EditOnEnter並使用以下代碼。
Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
Select Case DataGridView1.CurrentCell.ColumnIndex
Case Is = 0, 1
AddHandler CType(e.Control, TextBox).KeyPress, AddressOf TextBox_keyPress
End Select
End Sub
Private Sub TextBox_keyPress(ByVal sender As Object, ByVal e As KeyPressEventArgs)
If e.KeyChar <> ControlChars.Back Then
e.Handled = Not (Char.IsDigit(e.KeyChar))
End If
End Sub
這將只允許數據網格視圖的第 1 列中的數字、退格鍵、箭頭鍵、刪除、主頁、結尾、空格鍵。
private void DGV_Test_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
e.Control.KeyPress -= new KeyPressEventHandler(Column1_KeyPress);
if (DGV_Test.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.IsLetter(e.KeyChar))
{
if (e.KeyChar == 0x20) // Allow space also
{
}
else
{
e.Handled = true;
}
}
}
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