how to calculate sum three textbox without using buutton

Question

dear sir , how to calculate sum three textbox without using button ,the value put in three textbox the result show next textbox automatically using asp.net webform

Shubham Kumar · Answer

function fctSomme(){ var nb1 = parseInt(document.getElementById("txt1").value, 10); var nb2 = parseInt(document.getElementById("txt2").value, 10); var nb3 = parseInt(document.getElementById("txt3").value, 10); var nb4 = nb1 + nb2 + nb3; document.getElementById("sommeTtl").value=nb4; } event in asp.net just replace the input box to asp:textbox

Nishant Mittal · Answer

Hi y dont u write your code on TextBox3_TextChanged event ....it will solve the issue use this Private Sub TextBox1_TextChanged ( ByVal sender As System . Object , ByVal e As System . EventArgs ) Handles TextBox1 . TextChanged , TextBox2 . TextChanged If String . IsNullOrEmpty ( TextBox1 . Text ) OrElse String . IsNullOrEmpty ( TextBox2 . Text ) Then Exit Sub If Not IsNumeric ( TextBox1 . Text ) OrElse Not IsNumeric ( TextBox2 . Text ) Then Exit Sub TextBox3 . Text = CDbl ( TextBox1 . Text ) + CDbl ( TextBox2 . Text ) End Sub

how to calculate sum three textbox without using buutton

Answers (2)