javascript

ranjan sahoo

13y1.5k.NET

hiiiiii i want a validation i have   one textbox and one dropdownlist like





but iwant a javacript validation . when i will submit button it will show an alert box
The condion is like that:-

if dropdowlist value is P
alert('textbox should not blank')

if dropdowlist value is L
then alert will not show.

i want in javascript. how i will do plz give me solution

10 Replies

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Sanjeeb Lenka13y ago
i didn't get you plz provide clear details.
ranjan sahoo13y ago
when i am select it then first textbox it cheacks validation but step it is not showing validation
Sanjeeb Lenka13y ago
hi,

you can try like this to call a javascript function from .cs or code behind

Page.ClientScript.RegisterStartupScript(this.GetType(),"Call my function","MyFunction()",true);

MyFunction() is the javascript function
ranjan sahoo13y ago
how to write in asp.net javascript file and call in c# code behind
Sanjeeb Lenka13y ago
Hi,

its working for me perfectly. plz share your code i will check that.
ranjan sahoo13y ago
hiii it doesn't work it will show an error
Sanjeeb Lenka13y ago
try this:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
ranjan sahoo13y ago
hiiii it will show scripting error like: The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
Sanjeeb Lenka13y ago
Hi,

try this:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
Sanjay Kumar13y ago
Hi

http://www.codeproject.com/Tips/404274/Client-Side-Validation-using-JavaScript