Allow only numeric and one point in textbox

Question

4.00/5 (2 votes)

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I am validating a textbox as accepting only numbers and one point..

for that i am doing like this

XML

<asp:TextBox ID="txtBandwidth" runat="server"></asp:TextBox>
                          <asp:FilteredTextBoxExtender ID="FilteredTextBoxExtender1" runat="server" TargetControlID="txtBandwidth"
                              FilterType="Numbers,Custom" ValidChars="." Enabled="True">
                          </asp:FilteredTextBoxExtender>

But it is allowing multiple points (eg: 12....3444...) like this

I want to restrict like this 12.3444

Please help me..
Thanks in advance

Posted 4-Dec-13 20:13pm

kanamala subin

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4 solutions

Solution 1

Hai
Try ur code for restrict character,and add javascript for allow only one dot like this

ASP.NET

<asp:textbox id="txtBandwidth" onkeypress="return isNumberKey(event)" runat="server" xmlns:asp="#unknown"></asp:textbox>

                         <asp:filteredtextboxextender id="FilteredTextBoxExtender1" runat="server" targetcontrolid="txtBandwidth" xmlns:asp="#unknown">
                             FilterType="Numbers,Custom" ValidChars="." Enabled="True">
                         </asp:filteredtextboxextender>

in above code i add onkeypress event for handle allow only one dot in textbox and following is javascript,add javascript code in between header tag like

HTML

<script type ="text/javascript" lang ="javascript" >

      function isNumberKey(event) {
          document.getElementById('txtBandwidth').onkeypress = function (e) {
                 if (e.keyCode === 46 && this.value.split('.').length === 2) {
                  return false;
              }
          }
      }

  </script>

Best Regards
AravindB

Posted 4-Dec-13 21:15pm

Aravindba

Updated 4-Dec-13 21:16pm

v2

Solution 2

visit here....for decimal..
http://stackoverflow.com/questions/20162377/how-to-allow-only-decimal-numbers-in-a-textbox[^]

Posted 4-Dec-13 21:20pm

Rakesh Meel

Solution 3

Try this Jquery

http://way2designing.github.io/iframe/w2d-iFrame.html?iframe=http://plentz.github.com/jquery-maskmoney/[^]

Instead of input replace the following

XML

<asp:textbox id="txtDecimal" runat="server"  />
<script type="text/javascript">
    $(function(){
        $("#txtDecimal").maskMoney();
    })
    </script>

Posted 4-Dec-13 21:21pm

demouser743

Updated 4-Dec-13 21:23pm

v2

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**VICK** · Accepted Answer · 2013-12-05T01:07:00

Hi,

If you want to allow only numeric values along with single dot(.) in textbox, than kindly do have the following link which provides a REGEX based solution.

You can use these regex inside the aspRegularExpressionValidator to get the results as you want.

Regex allow digits and a single dot

Regular expression to allow a number with one dot or comma in it

Hope it will help you... :)