Blazor TextArea - Validation
This example is used to validate form using the Data Annotation. Type the value in the textarea. If the input value is valid, then the given input will be ready to submit. Otherwise, an error message will be shown until you enter the valid value.
The form enables the validation with data annotation attributes by clicking on the submit externally. All rules are validated by the DataAnnotationsValidator.
The above name and comments fields are configured with the following rules.
| Field | Rule |
|---|---|
| Required | The field must have a valid value. |
| MinLength | The name field must have more than 3 characters, and the comments field must have more than 10 characters in length. |
| MaxLength | The name field should not have more than 10 characters, and the comments field must should not have more than 20 characters in length. |
The above address fields are configured with the following rule.
| Field | Rule |
|---|---|
| Required | The fields must have a valid value. |