Hi i want to Use Onkey Press Event in Asp.net with c#

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Dear Friends,
Here i want to Write OnkeyPress Event in WebApplication in Asp.net with C#.I know it is Possible in Windows But how to do in Asp.net with C#.

Ex:i want to Calcute Two numbers that Result should store in Third Textbox:

Means Textbox1.text+ textbox2.text= result;

textbox3.text= result.

That Third textbox result should store KEYPRESS EVENT.

Regards,

Anilkumar.D

Posted 28-Aug-11 20:30pm

Anil Honey 206

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Abhinav S · Answer 1 · 2011-08-28T20:39:00

Solution 1

This is easier to in the JavaScript side of the code.
See a discussion[^] and samples using KeyPress.

Posted 28-Aug-11 20:39pm

Abhinav S

Updated 28-Aug-11 20:40pm

v2

Comments

Anil Honey 206 29-Aug-11 2:48am

Dear Abhinav,

Iam using DevExpress Control TextBox for that TextBox there is no OnkeyPress Property.In Normal asp.net Textbox Having onkeypress Property thats the Problem.SO Iam Unable to write the onkeyPress Event in DevExpress textBox.

maya-123 · Answer 2 · 2011-08-28T21:19:00

"That Third textbox result should store KEYPRESS EVENT "

I think You can do this on click event.
On key press you can allow user to enter only numbers.
On click on third textbox calculate your result.

XML

<label>First number</label>    <asp:TextBox ID="TextBox1" runat="server" onkeypress="return isNumberKey(event)"></asp:TextBox> <br />

      <label>Second Number</label>  <asp:TextBox ID="TextBox2" runat="server" onkeypress="return isNumberKey(event)" ></asp:TextBox> <br />

      <label>Your result</label>   <asp:TextBox ID="TextBox3" runat="server" ReadOnly="true" onclick="javascript:check()"></asp:TextBox>

XML

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

         return true;
      }
      
      function check()
      {
    var value = document.getElementById('<%=TextBox1.ClientID%>').value;
    var value1 = document.getElementById('<%=TextBox2.ClientID%>').value;
    if(value!="" && value1!="")
    {

   var sum = parseInt(value)+parseInt(value1);
    document.getElementById('<%=TextBox3.ClientID%>').value = sum;
    }

      }

</script>

hope this works !