How To Add Error To Validationsummary
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Add Error To Validationsummary Mvc
them; it only takes a minute: Sign up On postback, how can I add a error message to validation summary? up vote 50 down vote favorite 12 Two questions: On postback when a user clicks submit, how can I add a error message to validation summary? Is it also possible to highlight a particular textbox using the built in add custom validator to validation summary .net validation controls? asp.net validation share|improve this question edited Apr 22 '09 at 15:57 TStamper 22k85069 asked Apr 22 '09 at 15:39 Blankman 64.4k197564924 add a comment| 5 Answers 5 active oldest votes up vote 71 down vote Dynamically create a CustomValidator control and add it directly to the Page.Validators collection. Dim err As New CustomValidator err.ValidationGroup = "MyGroup" err.IsValid = False err.ErrorMessage = "The password is invalid" Page.Validators.Add(err) Unlike adding the CustomValidator to the markup, this method allows you to add any number of arbitrary error messages based on server-side business logic. Note that you can also add it to the page directly, but there are a couple of rules to follow: You must add the control to the same naming container as the controls of the validation group. If you don't want the validation message to appear in a random position in the page, you will either have to add the validator to a specific container or you will need to supress it using a CSS class or style. You can also cre
Posted on July 4, 2014 by briancaos This trick is especially useful when you have custom code to add message to validation summary javascript be executed after your form have been submitted, and still
Validationsummary Message
wishes to communicate an error the same way as you communicate form validation errors. Imagine
Jquery Add Error Message To Validation Summary
the following ValidationSummary:
J InceFebruary 28, 200819 0 0 0 For a while now I’ve used this handy bit of code to add a message programmatically to a Validation Summary control, without associating it with a Validator. I’ve no idea where it came from – perhaps my head, perhaps someone https://blogs.msdn.microsoft.com/simonince/2008/02/28/adding-messages-to-a-validation-summary/ cleverer than I… so if it was from you, shout up! I was asked how to do this today by a customer, so I felt inspired to blog it. Anyway, sometimes you get an error from your business logic that it just isn’t practical to have pre-validated. For example, when adding a new employee to a database, perhaps the employee name has a UNIQUE constraint on it. Validating this up front might not be easy… to validation So if I get an error back from my business logic (either in the form of a list of validation errors, or in the worst case scenario as an exception) how do I display this message to the user? Well it turns out this is quite easy – just add a validator that is reporting itself as “IsValid = false” to the Page.Validators collection. Consider the following class; public class ValidationError : IValidator { private ValidationError(string message) { ErrorMessage = message; IsValid = false; } public string ErrorMessage { get; set; } public bool IsValid { get; set; } public void Validate() { // no action required } public static void Display(string message) { Page currentPage = HttpContext.Current.Handler as Page; currentPage.Validators.Add(new ValidationError(message)); } } (Note: This is usingautomatic properties - a C# 3.0 feature. Alter the code to use standard properties if you're using an earlier version of .NET) This immediately allows me to use the following code; ValidationError.Display("Oops, some error occurred."); Succinct, eh?! Here’s a shot of it in action;
Tags ASP.NET C# Comments (19) Cancel reply Name * Email * Website Jason says: February 29, 2008 at 12:07 pm Thanks for this. It definitely came in useful for me. Reply KA says: March 28, 2008 at 1:15 pm This works well - thanks for the tip. Reply Nicole says: April 7, 2008 at 2:06 pm Something similar to this can be done by adding a CustomValidator dynamically when the error occurs. For example: CustomValidator cv = new CustomValidator(); cv.IsValid = false; cv.ErrorMessage = "The error to display."; this.Page.Validators.Add(cv); Reply Simon J Ince says: April 8, 2008 at 5:13 am