WPF MaskedTextBox所需的值 [英] WPF MaskedTextBox required value

问题描述

This is my masked textbox from the WPF Extended Toolkit 

<toolkit:MaskedTextBox Name="MaskedtxtTaxId"  Mask="00-0000000" />

我不希望用户输入不完整的值，例如45-781 ____

但它可以像__-一样空_______

我需要强制用户输入所有9位数字或将其留空。

我可以用MaskedTextBox完成吗？



谢谢。

I don''t want the user to enter incomplete value eg 45-781____
but it can be empty like __-_______
I need to force the user to enter all 9 digits or leave it empty.
Can I accomplish that with the MaskedTextBox?

Thank you.

推荐答案

试试这个。

try this.

private void MaskedtxtTaxId_LostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
  if (((MaskedTextBox)sender).MaskedTextProvider.AssignedEditPositionCount < ((MaskedTextBox)sender).MaskedTextProvider.AvailableEditPositionCount)
  {
    System.Windows.MessageBox.Show("Not valid");
    /// do something
  }
}

您需要检查在MasketTextBox中输入的值的长度。



类似
的东西

You need to check the Length of Value entered in the MasketTextBox.

Something like

If ( MaskedtxtTaxId.Value.Length < 9 and  MaskedtxtTaxId.Value.Length > 0 ) Then

 'display message "Value entered cannot be incomplete"

End if

var vPromptCharCount = MaskedtxtTaxId.Text.Count(x => x == '_');
if (count > 0 && count < 9)
{
    //invalid
 }

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