How to put decimal value in textbox? Example, I want to put value 0.20 or 20 but to be read as 20%?
2 Answers
Because you should keep this kind of code out of your business logic, you might want to use a StringFormat combined with a custom value converter. Please refer to this article.
In your case, the TextBox might - without knowing your code - look like this:
<TextBox Text="{Binding PercentValue, StringFormat=P, Converter={StaticResource PercentageConverter}}" /> The "P" here wold treat 0.25 as 25%.
1 Comment
Karolis Kajenas
Converter has to be imported as a resource to the XAML. Your answer is incomplete and yet copied without understand of how it works yourself.
This should work
decimal val = 0M; decimal.TryParse(YourTextBox.Text, out val); decimal valAsPercent = val * 100; // Then when you want to stuff the new value back into your textbox YourTextBox.Text = valAsPercent.ToString() + "%"; 
StringFormatin your binding, as shown in the linked question. If you need something more advanced such as converting either "0.2" or "20" to a percent, you can use aConverter. For an example of a converter that only converts "20", check here - you should be able to easily modify that to check for something like ".20" too.