I have a textbox and I need to let user enter only amount of money, which means only numbers and a ma

here is what I have

 <asp:TextBox ID="txt_tutar" runat="server" onkeypress="this.value=this.value.replace(/\D/g,'')"></asp:TextBox>

this code above only allows numeric, it deletes the ma. how can I update to let user enter float number in textbox ?

I have a textbox and I need to let user enter only amount of money, which means only numbers and a ma

here is what I have

 <asp:TextBox ID="txt_tutar" runat="server" onkeypress="this.value=this.value.replace(/\D/g,'')"></asp:TextBox>

this code above only allows numeric, it deletes the ma. how can I update to let user enter float number in textbox ?

• javascript
• asp
• css

2 Answers 2

Use this regular expression:

/[^\d,]/g

As in:

this.value=this.value.replace(/[^\d,]/g,'')

Of course this doesn't really mean the string will be a valid numeric value; e.g. 2,,0,1 would be considered fine. You really should be doing full server-side validation using decimal.TryParse or something similar

Here you can also use required field validator to do ths,

Better way go with javascript at client side for performance, use below script

function isValidNo(str) {
            var inbadChars = "\t\n\r^&*=~`';<>?[]{}abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
            //debugger;
            for (n = 0; n < str.length; n++) //filter for invalid chars
            {
                if (inbadChars.indexOf(str.charAt(n)) != -1) return false;
            }
            return true;
        }

Reended to use server side tryparse as well, as on somebrowser sometimes scripets may not work.