FluentValidation throws System.InvalidCastException-CodePudding

I updated packages in an .NET Framework project developed using FluentValidation v8.1.3. FluentValidation was upgraded to v11.1.0 when I updated the packages in the project. This update caused an error to be thrown by FluentValidation:

public static class Utility
{
    public static void Validate(IValidator validator, object entity)
    {
        /* System.InvalidCastException */
        var result = validator.Validate((IValidationContext) validator);

        if (result.Errors.Count > 0)
        {
            throw new ValidationException(result.Errors);
        }
    }
}

Error details are available below:

System.InvalidCastException: 'Unable to cast object of type 'DevFramework.Business.ValidationRules.FluentValidation.CustomerValidator' to type 'FluentValidation.IValidationContext'.'

How do I fix this problem?

CodePudding user response：

In the current version of FluentValidation v11.1.0 it is necessary to create a ValidationContext object to fix this error.

public static class Utility
{
    public static void Validate(IValidator validator, object entity)
    {
        /* Notice that the ValidationContext object is created below. */
        var context = new ValidationContext<object>(entity);
        var result = validator.Validate(context);

        if (result.Errors.Count > 0)
        {
            throw new ValidationException(result.Errors);
        }
    }
}