How to get rid of Page_ClientValidate() ?

  • Thread starter Thread starter Ante Perkovic
  • Start date Start date
A

Ante Perkovic

Hi,

I'm trying to make a client side validation in a datagrid. Here is
what I did:

in mypage.aspx, I put:
<script language=javascript>
function isItValid(){ // just testing the functionality
if (document.Form1.txtIme.value != "ok"){
alert("!= OK")
return false
}else{
alert("OK")
return true
}
}
</script>

and in codeBehind file, I put:

Private Sub dgRezervirano_ItemDataBound(ByVal sender As Object,
ByVal e As DataGridItemEventArgs) Handles dgRezervirano.ItemDataBound
If e.Item.ItemType = ListItemType.EditItem Then
Dim btn as New Button()
btn = CType(e.Item.Cells(4).Controls(0), Button)
btn.Attributes("onclick") = "return isItValid()"

But, in html that is generated, I can see:
<input type="submit" name="dgRezervirano:_ctl4:_ctl0" value="ok"
onclick="if (typeof(Page_ClientValidate) == 'function')
Page_ClientValidate(); " language="javascript" onclick="return
isItValid()" />

Looks like
if (typeof(Page_ClientValidate) == 'function') Page_ClientValidate();
causes
onclick="return isItValid()"
to be ignored!(?)

How can I change this?

BTW, what is this Page_ClientValidate thing doing. How can I use it?

Thanks,

Ante
 
Hi Ante,

If you want to supress the client validation provided by ASP.NET set the
CausesValidation Property of the Button to false:
btn.CausesValidation = False

Another way would be to use a CustomValidator ans set it's
ClientValidationFunction Property to the name of your Function ('isIfValid')

cn
 
If you want to supress the client validation provided by ASP.NET set the
CausesValidation Property of the Button to false:
btn.CausesValidation = False

Another way would be to use a CustomValidator ans set it's
ClientValidationFunction Property to the name of your Function ('isIfValid')

cn
Click to expand...

Thanks, Christof

I set btn.CausesValidation to False, but still have the problem! Now,
the code looks like this:

<script language="javascript">
function isItValid(){
alert(document.Form1.txtIme.value)
if (document.Form1.txtIme.value != "ok"){
alert("!= OK")
return false
}else{
alert("OK")
return true
}
}
</script>

in codeBehind:
....
btn.CausesValidation = False
btn.Attributes("onclick") = "isItValid()"
....

which results in this html being generated:
<script language="javascript">
function isItValid(){ ... // the same, that's OK
....
<input type="submit" name="dgRezervirano:_ctl6:_ctl0" value="OK"
onclick="isItValid()" ID="Submit9" />

As You can see, onclick now contains only "isItValid()". But, whan I
click it, nothing happens (not even the alert popup)!
This looks like javascript/html problem now (?)

I don't get it!

Ante Perkovic
 
I think you really might want to look into what Chistof has to say about the
CustomValidator.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/
frlrfsystemwebuiwebcontrolscustomvalidatorclasstopic.asp

specifically read about the ClientValidationFunction property to set your
own client validation function to it.

BTW, what is this Page_ClientValidate thing doing. How can I use it?
Click to expand...

That is output by the framework to assist in calling the all the validators
for the page. I would suggest reading more about validation to use this
really cool and easy feature.

bill
 
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