How to make textbox Positive numeric only in mvc

There are many ways to do that:

Option 1: using RegEx:

[RegularExpression("([1-9][0-9]*)", ErrorMessage = "Enter only numeric number")]

public int Amount { get; set; }

Option 2: using plain JavaScript validation:

function isNumberKey(evt)

{

var charCode = (evt.which) ? evt.which : event.keyCode;

if (charCode != 46 && charCode > 31

&& (charCode < 48 || charCode > 57))

return false;

return true;

}

then call that like this in your textbox:

onkeypress="return isNumberKey(event);"

or you could do:

function OnlyNumber(i)

{

if(i.value.length>0)

{

i.value = i.value.replace(/[^\d]+/g, '');

}

then call it like:

Option 3: using HTML 5

@Html.TextBoxFor(Function(model) model.Amount, New With {.type = "number"})

or like this:

@Html.TextBoxFor(i => i.Amount, new { @type = "number" })

Option 4: using Validation plugins. Just search for them at google to get more examples

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