CODEWITHSUNDEEP
c#
Pablo Tobar
Pablo Tobar

Reputation: 634

do not allow negative values in int property MVC C#

I do have a strongly typed view in MVC C# in which the user has to enter a int value, the property is

 [Required(ErrorMessage="especificar correlativo")]
    [Display(Name = "Correlativo")]
    [Range(1, 9999, ErrorMessage = "correlativo no valido")]
    [RegularExpression(@"^(((\d{1})*))$", ErrorMessage = "correlativo no valido")]
    public int correlativo1
    {
        get { return Correlativo1; }
        set { Correlativo1 = value; }
    }

but my problem is that when the vies displays, the input lets the user specifies a negative value via the arrows at the right of the input

enter image description here

and yes it shows the validation message

enter image description here

but I don´t want (since the very beggining) let the user to have the option of specifies negative values.

this is the input in the view

<div class="form-group">
                    <div class="col-md-2">
                        @Html.LabelFor(model => model.correlativo1, htmlAttributes: new { @class = "control-label" })
                        @Html.EditorFor(model => model.correlativo1, new { htmlAttributes = new { @class = "form-control left-border-none", @id = "idCorrelativo", @title = "especifique correlativo de licitación", @Value = ViewBag.correlativo } })
                        @Html.ValidationMessageFor(model => model.correlativo1, "", new { @class = "text-danger" })
                    </div>

could you please tell me how to fix it?

Upvotes: 5

Views: 11589

Answers (3)

Out_Of_Names
Out_Of_Names

Reputation: 58

I'm not very experienced with MVC but you could consider one of the following.

If negative values are invalid then perhaps you may want to consider using an unsigned int rather than an int.

Or.. Change the set of your property to prevent values lower than 0.

public int correlativo1
{
    get { return Correlativo1; }
    set
    { 
        if (value >= 0)
            Correlativo1 = value;
        else
            Correlativo1 = 0;
    }
}

Upvotes: 0

maccettura
maccettura

Reputation: 10819

Actually, see if adding a min attribute to your editor will work. Basically want to render: min="0" in your final HTML. So in your code:

<div class="form-group">
    <div class="col-md-2">
         @Html.LabelFor(model => model.correlativo1, htmlAttributes: new { @class = "control-label" })
         @Html.EditorFor(model => model.correlativo1, new { htmlAttributes = new { @class = "form-control left-border-none", @id = "idCorrelativo", @title = "especifique correlativo de licitación", @Value = ViewBag.correlativo, @min="0" } })
         @Html.ValidationMessageFor(model => model.correlativo1, "", new { @class = "text-danger" })
    </div>
</div>

You can also use this to add the max attribute as well (if needed)

Upvotes: 6

WithMetta
WithMetta

Reputation: 381

 @Html.EditorFor(model => model.correlativo1, new { htmlAttributes = new { @min = 0, @max = 9999, @class = "form-control left-border-none", @id = "idCorrelativo", @title = "especifique correlativo de licitación", @Value = ViewBag.correlativo } })

Upvotes: 3

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