Validations with Telerik controls

[Daniel]

Hi,

How I use validations with your controls ?

Thanks,

[Daniel]

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 | Manager Technical Support]

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]

Does MaskedEntry  replace telerikInput:RadEntry if yes can you give sniped code ?

[Lance | Manager Technical Support]

See .NET MAUI MaskedEntry Documentation | Overview | Telerik UI for .NET MAUI

[Daniel]

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]

Hi,

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

Thanks,

[Lance | Manager Technical Support]

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

• If you would like a code example, please look at the code examples in the SDKBrowser demo app https://docs.telerik.com/devtools/maui/demos-and-sample-apps/maui-demo-app 
• If you would like help with developing a Regex pattern for your desired mask, you can ask on StackOverflow.

[Daniel]

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,

[Lance | Manager Technical Support]

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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