Add Error To Validationsummary Code Behind
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Mvc Add Error To Validationsummary
us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is asp.net add error to validationsummary a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up On postback, how can I add a error message to validation summary? up validationsummary add error message vote 49 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 .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 63.8k195560920 add a comment| 5 Answers 5 active oldest
Validationsummary Add Message Programmatically
votes up vote 70 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 create a custom class and implement IValidator, which enables you to add the message with one line of code, but this method doesn't support Validation Groups. Per Anders Fjeldstad's suggestion, here is a set of handy extension methods. Imports Microsoft.VisualBasic Imports System.Runtime.CompilerServices Public Module PageExtensions
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 add custom validator to validation summary where it came from – perhaps my head, perhaps someone cleverer than I… add error message to validation summary using jquery so if it was from you, shout up! I was asked how to do this today by a customer, so
Add Message To Validationsummary Mvc
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 http://stackoverflow.com/questions/777889/on-postback-how-can-i-add-a-error-message-to-validation-summary database, perhaps the employee name has a UNIQUE constraint on it. Validating this up front might not be easy… 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 – https://blogs.msdn.microsoft.com/simonince/2008/02/28/adding-messages-to-a-validation-summary/ 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 - thaPosted on July 4, 2014 by briancaos This trick is especially useful when you have custom code https://briancaos.wordpress.com/2014/07/04/add-custom-text-to-aspvalidationsummary-c/ to be executed after your form have been submitted, and still wishes to communicate an error the same way as you communicate form validation http://jonathanjungman.azurewebsites.net/blog/post/ASPNET-Add-New-Error-Message-to-Validation-Summary-Control.aspx errors. Imagine the following ValidationSummary:
from your code-behind page. Don't forget to use the proper ValidationGroup that your validation summary is using. protected void AddErrorToValidationSummary(string errorMessage){ CustomValidator custVal = new CustomValidator(); custVal.IsValid = false; custVal.ErrorMessage = errorMessage; custVal.EnableClientScript = false; custVal.Display = ValidatorDisplay.None; custVal.ValidationGroup = "MyValidationGroup"; this.Page.Form.Controls.Add(custVal);} Tags : asp.net, validation, validation summary, error Related posts ASP.NET: Add New Error Message to Validation Summary Control You can usethismethod to add a new error to an existing validation summary control from ... ASP.NET: Improving Your Error Logging & Handling One of the first things I like to setup when I am creating a new site is a customized error page and... Visual Studio: Build failed due to validation errors in dbml file Today, while attempting to build a class library on our build box I received the following error in ... Comments are closed About Me Just another .NET developer who happens to be named Jon Search Tag cloud .net advanced search ajax ajax control toolkit Application_Error archive ashx asp.net AutoComplete binary bind blob blog border bug button c# caching checkbox constraint convert css database datatextfield date dbml dialog directory dropdownlist dropshadowextender dynamic emptydatatemplate encoding enter enum error error handling error page fileupload firefox FreeTextTable gdi+ global.asax gridview handler html http handler ie8 iis image imagebutton imageurl JavaScript jquery jquery ui linq linq to sql linqdatasource linqkit logging management studio modal popup mvc paging panel partitionResolverType path Postback predicatebuilder regular expression Reporting Services request santa cruz scriptmanager session state sound card Source Safe sql sql server stored procedure System.IO System.Web.AspNetHostingPermission tab tabindex trigger turtle beach unique UpdatePanel updateprogress validation validation summary visual studio web service where windows 7 Month List 2009 May (3)June (4)July (4)August (2)September (3)November (2)December (1) 2010 January (1)February (2)March (3)April (1)May (1)June (1)July (1)August (1)September (1)December (1) 2011 January (2)May (1) 2013 February (1)March (1)June (1) Blogroll Coding HorrorCan Software Make You L...The Raspberry Pi Has Re...The Golden Age of x86 G...ScottGu's BlogI’m speaking at a Free...Welcoming the Xamarin t...AzureCon Keynot