[Solved] UI doesn't update with PadLeft

[yijie]

Hi,

I want to do the PadLeft within the MashedInput control and i do it as below. However i found out that the UI doesn't update and refresh itself whereas the private backup field has changed.  When i create another control binding to the same property it will update when i inpute something into the MashedInput control.

In short the MashedInput control don't refresh itself when the databinding source change. Please help me there.

GUI

 

<telerik:RadMaskedTextInput
            Value="{Binding Number, Mode=TwoWay}" Mask="###" UpdateValueEvent="LostFocus"
            HorizontalAlignment="Left" Margin="12,12,0,0" Name="radMaskedTextInput1" VerticalAlignment="Top" Width="75" />

Codebehind

public class VM : ViewModelBase
   {
       private string _Number = "";
       public string Number
       {
           get
           {
               return this._Number;
           }
           set
           {
               value = value.PadLeft(3, '0');
               if (value != this._Number)
               {
                   this._Number = value;
                   RaisePropertyChanged("Number");
               }
           }
       }
   }

[Petar Mladenov]

Hi Yijie,

 Can you confirm that you use the Telerik's ViewModelBase class. It has OnPropertyChanged method, not RaisePropertyChanged. I prepared a sample for you demonstrating this. Please let us know if it satisfies you.

Greetings,
Petar Mladenov
the Telerik team

[yijie]

Hi Petar,

Thanks for your reply. However your sample code still not meet my requirement.

Here i want. If user input __1 then invoking the lostfocus event then the binding source will be set to 001 right? However the UI doesn't update at all it still dispaly __1. When i use common textbox control it works fine.

Please help me there.

Regards,

Alex Fan

[yijie]

Hi Petar,

Thanks for your reply. However your sample code still not meet my requirement.

Here i want. If user input __1 then invoking the lostfocus event then the binding source will be set to 001 right? However the UI doesn't update at all it still dispaly __1. When i use common textbox control it works fine.

private void Button_Click(object sender, RoutedEventArgs e)
{
    (this.radMaskedTextInput1.DataContext as VM).Number = "1";
}

Besides the code above works fine no matter i use myown base class or  Telerik's ViewModelBase, it doesn't work only if you input the number inside the control. Pls have a try.

Please help me there.

Regards,

Alex Fan

[Tina Stancheva]

Hi Yijie,

I logged this issue in our PITS as a bug. You can track its progress from here.

In the meantime as a workaround you can define a ValueToTextConverter to display 001 in the MaskedTextInput control when the user enters 1.

Regards,
Tina Stancheva
the Telerik team

[yijie]

Hi Tina,

Thanks for your reply and workaround solution. I shall track this issue and looking forwards to the fxied version.