如何在Windows Phone TextBox Wpf C＃中键入大写字符串

Question

how To Type Uppercase String in windows phone TextBox Wpf c#.

I tried it on KeyDown Event.

   void TxtPanno_KeyDown(object sender, KeyEventArgs e)  
   {

   TxtPanno.Text = TxtPanno.Text.ToUpper();  //1 code.

   TxtPanno.Text= CultureInfo.CurrentCulture.TextInfo.ToUpper(TxtPanno.Text); //2 code     

   TxtPanno.Text=Regex.Replace(TxtPanno.Text, "^[A-Z]", m => m.Value.ToUpper());  //3 code. 
   }

But Problems is that.

Cursor always go to leftside.

Answer 1

Try doing:

TxtPanno.Text = TxtPanno.Text.ToUpper(); 
TxtPanno.SelectionStart = TxtPanno.Text.Length;
TxtPanno.SelectionLength = 0;

It makes the text uppercase, moves the cursor to the end and selects nothing.

Answer 2

You should not try to replace text,instead you should apply styles like this

<Style TargetType="{x:Type TextBox}">
    <Setter Property="CharacterCasing" Value="Upper"/>
</Style>

The above style will make all textboxes uppercase, you can change it to only apply to a specific textbook like this

<TextBox CharacterCasing="Upper" />

then when using the text entered, make it upper case.

Answer 3

Finally I tried this code and it worked.

void TxtPanno_TextChanged(object sender, TextChangedEventArgs e)
{

  TxtPanno.Text = TxtPanno.Text.ToUpper();
  TxtPanno.SelectionStart = TxtPanno.Text.Length;

}