ASP.NET - javascript return flase
Asked By srikar
09-Sep-10 04:07 AM
javascript return flase waht it's do. wht is the necessity of it.
Santhosh N replied to srikar
Whenever you require to get any boolean result from a function you could use that..especially in validation functions this reurn false will be used
Super Man replied to srikar
You can use this to test any condition.
If test returns then something is to execute.
Else do nothing or execute something else.
Sagar P replied to srikar
Actually its very useful in validations.... Like if you want user to only enter numbers in textbox then you can write JS function which will return true or false depedning on entered character... and you can use it for text box like;
txtNumbers.Attributes.Add("onkeypress","return OnlyNumbers()");
So it will not handle keypress event if its return false...... it will not enter that char at all in text box....
Same way if you dont want to refresh a page onclick on button you can use it like;
btn.Attributes.Add("onclientclick","return false;")
Anand Malli replied to srikar
Hi Sriakr,
Return false suppress the original event of your control ,say you have button and onclientclick is also there and onclick is also there so if your javascript function return false your server side event will never get fired,so now to make it fire you will need to rerun true
i think you got the point
Thanks
[ Kirtan ] replied to srikar
You have not mentioned what code returns false . still i m trying to give answer
False / True are boolean values that some time taken as 1 and 0 also they are written in java script for indicating success or failure / some other type of condition inside code of java script
Goniey N replied to srikar
-- First Of I Want To Say That There Is One Datatype Which Return Either "True" Or "False".
-- Means When You need This Kind Of True Or False Return Type Then You Can Use This Type As Return Type.
-- Let's Take One Example :
01.<script type="text/javascript">
02. function My(Name)
03. {
04. if(Name == 'EggHeadCafe')
05. //If Given "Name" Is "EggHeadCafe" Then It Will Return True...
06. return True;
07. else
08. //Else Return False...
09. return False;
10. }
11.</script>
12.
13.//Here On Button Click Event It Will Call The Function
14.<asp:Button ID="button1" Text="Check" runat="server" OnClick="button1_Click" OnClientClick="return My('EggHeadCafe');"/>
-- Depending On Your Condition It Will Return Either "True" Or "False"....
-- Hope This Will Helpful To You...
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