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V24.2

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DxHtmlEditor.ValidationMessage Property

Specifies a validation message that the editor displays on invalid user input.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
[Parameter]
public string ValidationMessage { get; set; }

#Property Value

Type Description
String

The validation message text.

#Remarks

<DxHtmlEditor> allows you to validate user input. To specify validation rules, use the IsValid property.

When a user enters an invalid value, the editor displays a validation message. Use the ValidationMessage property to specify the message’s text. You can also use the ValidationMessagePosition property to define the message position.

Note

<DxHtmlEditor> displays a validation message outside the editor area. To display a message correctly, adjust the editor size (Height and Width properties) or add margins.

#Example

The following code snippet validates user input in the MarkupChanged event handler and configures validation settings as follows:

  • Displays a validation message if the editor’s markup is empty.
  • Sets the validation message text.
  • Positions the validation message at the right editor edge.

HTML Editor - Right Validation Message Position

Razor
<DxHtmlEditor Markup="@markup"
              IsValid="@isValid"
              ValidationMessage="Empty markup."
              ValidationMessagePosition="HtmlEditorValidationMessagePosition.Right"
              MarkupChanged="@OnMarkupChanged"
              Height="100px"
              Width="80%" />

@code {
    bool isValid;
    string markup { get; set; } = "";
    void OnMarkupChanged(string newValue) {
        markup = newValue;
        isValid = !string.IsNullOrEmpty(newValue);
    }
}
See Also