In C#, What Does The ‘entityvalidationerrors’ Property Provide When Validation Fails For One Or More Entities?

In C#, the error message you mentioned typically occurs when the validation of one or more entities fails. The error includes an EntityValidationErrors property that provides more details about the specific validation errors.

To resolve this issue, you need to examine the EntityValidationErrors property to identify the validation errors and fix them accordingly. Here’s an example of how you can access the validation errors:

try
{
    // Your code that performs entity validation

    // Save changes to the database
    dbContext.SaveChanges();
}
catch (System.Data.Entity.Validation.DbEntityValidationException ex)
{
    foreach (var validationErrors in ex.EntityValidationErrors)
    {
        foreach (var validationError in validationErrors.ValidationErrors)
        {
            Console.WriteLine("Property: {0} Error: {1}", validationError.PropertyName, validationError.ErrorMessage);
        }
    }
}

In the above example, ex.EntityValidationErrors gives access to the collection of validation errors. By iterating over this collection and accessing validationError.PropertyName and validationError.ErrorMessage, you can identify the property that failed validation and the specific error message.

Once you have identified the validation issues, you can update your code to ensure the entities comply with the required validations before attempting to save changes again.

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