I want to implement thousand separator in Windows 10 calculator in textbox....

Question

I want to implement thousand separator in Windows 10 calculator in textbox....

c00012 746

Hello,

I want to implement thousand separators in Windows 10 calculator in Textbox:

if someone gives me a good advice, I'd be very appreciated.

thanks,

c00012

1 answer

Your answer

Answer 1

Hui Liu-MSFT 48,676 Microsoft External Staff

The following code could implement the thousands separator. Is it suitable for your situation?
The code of xaml:

 <TextBox Name="textBox"  TextChanged="textBox_TextChanged"/>

The code of xaml.cs:

private void textBox_TextChanged(object sender, EventArgs e)  
        {  
          if (!string.IsNullOrEmpty(textBox.Text))  
          {  
            System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo("en-US");  
            var valueBefore = Int64.Parse(textBox.Text, System.Globalization.NumberStyles.AllowThousands);  
            textBox.Text = String.Format(culture, "{0:N0}", valueBefore);  
            textBox.Select(textBox.Text.Length, 0);  
          }  
        }

The result picture:

c00012 746

to make a long story short, your code is not exact what i want because your code is event-driven one.
so, i converted your code as following way:

<ViewModel>
public MainViewModel()
{

        InpuThousandCommand = new RelayCommand<object>(thousand);
    }

    private void thousand (object obj)
    {
        var balue = obj as Views.PersonalLoan;
        if (!string.IsNullOrEmpty(balue.Amount.Text))
        {
            System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo("en-US");
            var valueBefore = long.Parse(balue.Amount.Text, System.Globalization.NumberStyles.AllowThousands);
            balue.Amount.Text = string.Format(culture, "{0:N0}", valueBefore);
            balue.Amount.Select(balue.Amount.Text.Length, 0);
        }
    }

I 've got error message after testing above code:
System.NullReferenceException: 'Object reference not set to an instance of an object.'

balue was null.

plz let me know how can i fix it.

c00012

c00012 746 Reputation points

2021-08-05T05:58:29.187+00:00

<XAML>
<TextBox x:Name="Amount" Text="{Binding PersonalLoanVM.LoanAmt, Mode=TwoWay}" Grid.Row="1" Grid.Column="1" Margin="20" Height="30" FontSize="18" FontFamily="Segoe UI">
<b:Interaction.Triggers>
<b:EventTrigger EventName="TextChanged">
<b:InvokeCommandAction Command="{Binding InpuThousandCommand}" PassEventArgsToCommand="True"/>
</b:EventTrigger>
</b:Interaction.Triggers>
</TextBox>

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I want to implement thousand separator in Windows 10 calculator in textbox....

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