Preventing textbox to enter string

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i am trying a textbox which accept mobile number if it is greater than ten. Problem is that it also accept the string. can i validate it to accept only digit. here is my code:

<script language="C#" runat="server">
    protected void CustomValidatorPhone(object source, ServerValidateEventArgs args)
  {
      if (txtMobileNumber.Text.Length <=10)
    {  args.IsValid = true; }
   else
    {  args.IsValid = false; }
}</script>

and callling it on:

<asp:CustomValidator CSSClass="body" id="cusPhone" ValidationGroup="EditProfile"   OnServerValidate="CustomValidatorPhone" Text="Invalid mobile Number"   runat="server" /> </div>

so in script what i need to add or extend my code.. thanks in advance..

Posted 14-Dec-10 23:54pm

balongi

Updated 14-Dec-10 23:59pm

Toniyo Jackson

v2

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Comments

Toniyo Jackson 15-Dec-10 5:59am

Use code block only for code.

6 solutions

Solution 5

Check this

JavaScript

function isAlphabetic(val1)
{
    if (val1.match(/^[0-9]+$/))
    {
        return true;
    }
    else{
      if (val1.match(/^[A-Z]+$/)){
       return false;
      }
    }
}

Posted 15-Dec-10 2:32am

John_mdk

Updated 15-Dec-10 8:39am

v2

Comments

fjdiewornncalwe 15-Dec-10 14:40pm

Just fixed your pre block...

Solution 6

XML

<asp:TextBox ID="TextBox1" MaxLength="10" runat="server"></asp:TextBox>
        <asp:RegularExpressionValidator ControlToValidate="TextBox1" ID="RegularExpressionValidator1" runat="server" ErrorMessage="RegularExpressionValidator" ValidationExpression="\d+"></asp:RegularExpressionValidator>

Use it

Posted 15-Dec-10 20:29pm

Mohd Wasif

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thatraja · Accepted Answer · 2010-12-15T00:01:00

Solution 1

You just give MaxLength=10 to the textbox txtMobileNumber.

You can use RegularExpression[^] or javascript[^]

Do customizations based on your need, that's all.

Posted 15-Dec-10 0:01am

thatraja

Updated 15-Dec-10 0:09am

v3

Comments

balongi 15-Dec-10 6:02am

ok , now how it prevent to enter string.

thatraja 15-Dec-10 6:08am

check my updated answer

Brij · Accepted Answer · 2010-12-15T00:03:00

Solution 2

For that, you can use regular expressions, that takes onl y numbers.
For details, Have a look

Posted 15-Dec-10 0:03am

Brij

sri_3464 · Accepted Answer · 2010-12-15T00:05:00

Solution 3

You can use RegularExpression to find whether the text is number.
Below is the code

System.Text.RegularExpressions.Regex regularExpression = new System.Text.RegularExpressions.Regex("^-[0-9]+$|^[0-9]+$");
           return regularExpression.Match(astrText).Success;

Posted 15-Dec-10 0:05am

sri_3464

Toniyo Jackson · Accepted Answer · 2010-12-15T00:09:00

Try this,
Javascript:

XML

<script type="text/javascript" language="javascript">
        function isNumberKey(evt) {
            var charCode = (evt.which) ? evt.which : event.keyCode
            if (charCode > 31 && (charCode < 48 || charCode > 57))
                return false;
            return true;
        }

<asp:CustomValidator CSSClass="body" id="cusPhone" ValidationGroup="EditProfile"   onkeypress="return isNumberKey(event)" Text="Invalid mobile Number"   runat="server" />

Preventing textbox to enter string

6 solutions

Solution 1

Solution 2

Solution 3

Solution 4

Solution 5

Solution 6

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