Net Add Error Validationsummary
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Add Error Message To Validation Summary Using Jquery
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Add Error Message To Validation Summary Using Javascript
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 .net validation controls? asp.net validation share|improve this question edited Apr 22 '09 at 15:57 TStamper 22.1k85069 asked Apr 22 '09 add error to validationsummary mvc at 15:39 Blankman 64.6k197564924 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 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
J InceFebruary 28, 200819 Share 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
Add Custom Validator To Validation Summary
idea where it came from – perhaps my head, perhaps someone cleverer add message to validation summary javascript than I… so if it was from you, shout up! I was asked how to do this today by a validationsummary message 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 http://stackoverflow.com/questions/777889/on-postback-how-can-i-add-a-error-message-to-validation-summary employee to a 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 https://blogs.msdn.microsoft.com/simonince/2008/02/28/adding-messages-to-a-validation-summary/ 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: MarchASP.NET Community Standup Forums Help Home/ASP.NET Forums/General ASP.NET/Web Forms/Adding http://forums.asp.net/t/1605230.aspx?Adding+New+Error+Message+to+Validation+Summary+Control New Error Message to Validation Summary Control Adding New http://justgeeks.blogspot.com/2010/11/adding-item-to-validationsummary.html Error Message to Validation Summary Control [Answered]RSS 3 replies Last post Sep 22, 2010 11:16 AM by Ahmed Moosa ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved to validation Threads Support Options Advanced Search Related Links GuidanceSamplesVideos Reply janets20 Member 19 Points 55 Posts Adding New Error Message to Validation Summary Control Sep 22, 2010 10:17 AM|janets20|LINK Hi, In the code behind based ona condition i want to add a error message to the to validation summary Validation Control. I tried the below. 'Call function to add error message. protected void AddErrorToValidationSummary(string errorMessage) { CustomValidator custVal = new CustomValidator(); custVal.IsValid = false; custVal.ErrorMessage = errorMessage; custVal.EnableClientScript = false; custVal.Display = ValidatorDisplay.None; this.Page.Form.Controls.Add(custVal); } Regards Janet Reply sansan All-Star 37505 Points 8111 Posts Re: Adding New Error Message to Validation Summary Control Sep 22, 2010 10:44 AM|sansan|LINK Append new text to the last validator in the page. val.ErrorMessage="ValueRequired!!!!\r\n"+"Newappendedtext"; Where val is the last validator in the page and it should display the new message. Santhosh Reply tyrone1964 Member 210 Points 67 Posts Re: Adding New Error Message to Validation Summary Control Sep 22, 2010 10:51 AM|tyrone1964|LINK Hi there, have a look at these articles maybe this is what you want. http://www.developerbarn.com/net-code-samples/39-programmatically-add-item-validation-summary.html http://www.extremeexperts.com/Net/FAQ/DisplayCustomMsgInValidationSummary.aspx Regards Reply Ahmed Moosa Contributor 5455
In general, field specific validation shows up next to a control that it is validating (assuming you put the validators next to it). But what about validation that happens in a Domain Service Class or your Custom BLL for example? These exceptions will by default be caught by the application and show as a nasty error to the user, or go to the error page. This is hardly the desired behavior for a validation error. First I like to change the default behavior of bubbling up to the application to be caught to being handled at the button or page level. To do this I put a try-catch in my button action or other applicable event that you can tap into. In the catch, it would be ideal to add a custom error message to the ValidationSummary. How do we do that though? Thankfully, it is quite easy to add an item to the ValidationSummary. The key is that the Page has a Validators property that all validators are automatically added to when you put them on your .aspx page. The problem is that we don't have a CustomValidator. Thus we need to create a CustomValidator, but what a pain really since we only want to use it when we actually have an exception in our BLL. My solution is to create method to encapsulate the logic to create a new CustomValidator and add it to the Page's Validators collection. So that it can easily be accessed on any page, I have implemented it as an Extension to the Page class. Below is the code to do so. namespace MyExtensions { public static class PageExtensions { public static void AddValidationSummaryItem(this Page page, string errorMessage) { var validator = new CustomValidator(); validator.IsValid = false; validator.ErrorMessage = errorMessage; page.Validators.Add(validator); } } } To use this method just put the using MyExtensions; statement at the top of your code-behind of the page that you want to use it on. Then you can do the following: protected void btnSubmit_Click(object sender,