Numeric Validation when using a HTML Text Box

Question

Just learning about Validation, so I had defined a property on my model like this:

public string NumberOfThings { get; set; }

and a HTML for it like this:

  @Html.TextBoxFor(t => t.NumberOfThings , new {style = "width: 10%", @class = "form-control"})

Now I want to add validation to it, the data is saved as String in Database schema. My validation logic want it to say any number larger than 0 is OK.

So I learned about validation and that I can do things like this:

[StringLength(3, MinimumLength = 1)]
public string SelectedQuestions { get; set; }

and then was aboe to see that oh my ModelState is not valid.
But since I am new to this I couldn't figure out what is the correct validation I should annotate my property with so that it says any number larger than 0 is OK.

Andrei Dragotoniu · Accepted Answer · 2016-06-08 16:07:11Z

2

a number of something is an int not a string.

you can do something like :

[Range(1, int.MaxValue, ErrorMessage = "some message")]
public int NumberOfThings { get; set; }

in your html you then use ValidationFor and it will look at what you have defined in your model:

@Html.EditorFor(model => model.NumberOfThings )
@Html.ValidationMessageFor(model => model.NumberOfThings )

answered Jun 8, 2016 at 16:07

Andrei Dragotoniu

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