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Asp net mvc set validation error message

" content { 0} is invalid for field { 1} " ). This link might be useful: asp. net/ srkirkland/ archive/ / 02/ 15/ adding- client- validation- to-. After the hundreds of comments on my answer I feel in the necessity to provide a full working example: As usual start with a. Your best bet though would be to perform custom validation ( you will likely want to verify the key is in the list, etc). Edit: fixed typo in the code - forgot closing " ) ". share| improve this. This tutorial explains Html. ValidationMessage( ) method in asp. It displays a validation message if an error exists for the specified field in the ModelStateDictionary object. Example: Custom error message in the Model. NET MVC razor ( you didn' t mention which version of MVC you were using), you just utilize attributes in the view model for validation, e. public class MyViewModel { [ Required( ErrorMessage = " Required" ) ] public string Name. I am quite new to MVC5 and asp.

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  • Video:Message error validation

    Validation message error

    net and I couldn' t find the answer, so I would be grateful if someone could tell me how to customize the message after failing the validation. Let' s assume I have a code like this: [ Required] [ MaxLength( 11). Range( 0, 250, ErrorMessage = " Please enter a number between. " ) ] [ Column] [ DataAnnotationsExtensions. Integer( ErrorMessage = " Please enter a valid number. " ) ] public int StreamEntriesPerPage { get; set; }. Iterating over ModelState is used for this purpose. Something along these lines: if (! IsValid) { StringBuilder result = new StringBuilder( ) ; foreach ( var item in ModelState) { string key = item. Key; var errors = item.

    ToString( ) ) ; } } return View( contactModel) ; / / this will persist user entered data on validation failure }. Client Side Validation. As far as this portion is considered, you have few more things to set up in your application. Update: Misread - - suggest this as the answer: How to change the ErrorMessage for int model validation in ASP. or better yet How to change ' data- val- number' message validation in MVC while it is generated by. In your model class, add change the [ Required] attribute to [ Required( ErrorMessage = " Material cost is required" ) ] public decimal MaterialCost { get; set; }. Another approach is to set it from JavaScript using JQuery or override.