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  • Category: ASP.NET

    addition of two numbers in textboxes to display in 3rd textbox

    HI all

    here i have three text boxes and i want to add first two text box numbers and need to disply in third text box. and my constraint is with out button press.

    My requirement is by entering the two numbers in first and second text box , automatically the total value will display in third text box.

    if possible please give me code.

    i want this in java script or c# code like text box text changed event.

    thank you.....
  • #307443
    <input name="textfield2" type="text" class="textBox" id="textfield2" s
    onblur="addtxt()" value="" />

    <script language="javascript" type="text/javascript">
    function addtxt() {

    var num1 = document.getElementById('textfield1').value;
    var num2 =document.getElementById('textfield2').value;
    intnum1 = parseInt(num1);
    intnum2 = parseInt(num2);
    document.getElementById('textfield3').value =intnum1 + intnum2;

    Gomathi Nayagam

    Please Rate my answer if it has helpful to you

  • #307452
    Enter A:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
    Enter B:<asp:TextBox ID="TextBox2" runat="server" OnChange="CalculateSum(this)"></asp:TextBox>
    Result : <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
    function CalculateSum(txtObject)
    var txt1 = document.getElementById('TextBox1');
    var txt3 = document.getElementById('TextBox3');
    if(txtObject !=null && txt1 != null && txt3 != null)
    if(txt1.value != '' && txtObject.value != '')
    txt3.value = parseInt(txt1.value) + parseInt(txtObject.value);

  • #307454
    Hi gomathinayagam,

    thank you for your fast response..

    its working fine.

    But when i entering the second value its giving the result 3rd text box before entering all digits.

    please help me out....

    thank you....

  • #307462
    [Response removed by Admin. Read forum policies.]
    Gomathi Nayagam

    Please Rate my answer if it has helpful to you

  • #307509


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