Validations with Telerik controls

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Daniel
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Daniel asked on 17 Mar 2022, 12:57 PM

Hi,

How I use validations with your controls ?

Thanks,

Daniel
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commented on 22 Mar 2022, 12:14 PM

ValidationErrorMessage is error.  

 <telerikInput:RadEntry Grid.Row="0" Grid.Column="1" x:Name="txtName" WatermarkText="Name" WidthRequest="200" Text="{Binding RouteName, Mode=TwoWay}" ValidationErrorMessage/>

                
Lance | Senior Manager Technical Support
Telerik team
commented on 22 Mar 2022, 02:06 PM

There is no such property for RadEntry, where did you get that code from? Are you guessing on what code to try or was that copy/pasted form a WPF project? We do not document such a feature because it is not a feature for the plan RadEntry. Please follow the directions in my answer, you'll find the components that support validation is the MaskedEntry and DataGrid cell editing component.
Daniel
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commented on 22 Mar 2022, 02:28 PM

Does MaskedEntry  replace telerikInput:RadEntry if yes can you give sniped code ?
Lance | Senior Manager Technical Support
Telerik team
commented on 22 Mar 2022, 02:57 PM

Daniel
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commented on 22 Mar 2022, 04:00 PM | edited

I need  validation to telerikInput:RadEntry .

I replace one with telerik:RadTextMaskedEntry.

I used this  and its look like that, where is the validation(icon) , i want enduser can type all text (all symboll).

   <telerik:RadTextMaskedEntry  Grid.Row="0" Grid.Column="1" ValidationErrorMessage="error" WidthRequest="200"/>
                

Daniel
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commented on 23 Mar 2022, 01:34 PM

Hi,

Can you please give me solution for problem above with sniped code ?

Thanks,

Lance | Senior Manager Technical Support
Telerik team
commented on 23 Mar 2022, 02:00 PM

I don't see a mask in your code, you only put the validation error message and a width. This tells me you did not read the documentation.

Please carefully read all of the documentation. It is not very long and explains how to use a mask and what to use for different input types. If you have a custom input, you can use a Regex to validate your user's input

Daniel
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commented on 23 Mar 2022, 03:32 PM

Hi,

I used this regex : https://stackoverflow.com/questions/3085539/regular-expression-for-anything-but-an-empty-string

and is not working(regular-expression-for-anything-but-an-empty-string)

           <telerik:RadRegexMaskedEntry   Grid.Row="0" Grid.Column="1" Mask="^(?!\s*$).+" ValidationErrorMessage="{Binding RouteNameValidation, Mode=TwoWay}" WidthRequest="200" Value="{Binding RouteName, Mode=TwoWay}"/>
        



 SaveCommand = new Command(
              execute: async () =>
              {
    
                  if (string.IsNullOrEmpty(RouteName))
                  {
                          RouteNameValidation = "Route name can't be empty.";
                      return;
                  }

Thanks,

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Lance | Senior Manager Technical Support
Telerik team
answered on 17 Mar 2022, 01:45 PM

Hi Daniel,

You will find a validation topic in the documentation for any control that validation is a relevant topic. You can search the documentation for "Validation"; if you are not sure what you're looking for just yet

Note: this is not the same thing you might be used to using in other frameworks like WPF. Xamarin.Forms and MAUI XAML is very different and doesn't have the same mechanisms. To learn more you can google/Bing "Validation in Xamarin.Forms" (.NET MAUI doesn't have many resources available, so you want to use "Xamarin.Forms" as a search term until MAUI has more content available.. even the official Microsoft documentation is very small because they are not done building it)

Regards,
Lance | Manager Technical Support
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