Razor pages PageModel validation not working

Question

Razor UI validation isnt working at all. When i go to post with empty text boxes it should say that this field is required but it just allows it to go through.

Trying to validate for the PageModel.

AddApplication.cshtml.cs

        [DataType(DataType.Text)]
        [BindProperty]
        public string appName{get;set;}

AddApplication.cshtml

<input type="text" asp-for="appName" placeholder="Enter Application Name" class="form-control" style="width:25%">
<span asp-validation-for="appName" class="text-danger"></span>

I already have the services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1); included in the start up so i don't understand why this isn't working.

https://stackoverflow.com/questions/17511437/mvc-not-validate-empty-string — Steve Greene, Aug 08 '19 at 17:18
Thanks this works. Didn't know that razor passes strings as empty instead of null. — Ajay Singh, Aug 08 '19 at 19:35

score 0 · Answer 1 · answered Aug 09 '19 at 17:15

Within your getter and setter you need to state that appName is required so it cannot be left blank.

[Required(ErrorMessage = "App Name Is Needed")]
public string appName{get; set;}

Without that the name can be left blank as you have seen. With this it should throw an error message after submission that the App Name Is Needed.

Razor pages PageModel validation not working

1 Answers1