RegisterClientScriptBlock

vellaima · April 14, 2003

Hi,

Dim scripts1 as String="<script>confirm('Are you sure?')"+"</"+"script>"
RegisterClientScriptBlock("alert1",scripts1)

In the above code i would like to capture whether the user has clicked Yes/No and do validations in the server accordingly.

Is it possible?

- Vidhya

bungpeng · April 15, 2003

Just continue all your javascript source code in "scripts1" variable like in normal HTML page

or I misunderstand your question?

vellaima · April 15, 2003

I have found out as to how to go about for it.

Sub Page_Load(Source As Object, E As EventArgs)
   cls.Attributes.Add("onclick","return confirm('Are you Sure you want to delete?');")
End Sub

Sub clsthread(Source As Object, E As EventArgs)
  Dim scripts as String ="<script>alert('The record is deleted')"+"</"+"script>"
  RegisterClientScriptBlock("alert1",scripts)
End Sub

Here "cls" is the ASP Control Button.

- Vidhya

bungpeng · April 16, 2003

Let me guess what are you going to do:

1. When user press the delete button, you ask them ("Are you sure you want to delete"?")

2. If user press "OK", then you delete record in your database? (do nothing if user press "Cancel")

3. If record deleted then you prompt message "The Record is deleted"

If this is right:

I hope you will understand the different between server and client when you use javascript (client) with ASP.NET(server). From Javascript, if you want to run ASP.NET, you need a PostBack (submit form), because you need to submit your page to server site.

It means when user press "OK" to delete record, then you need to submit your page, otherwise do nothing (using Javascript to handle this).

Delete record using ASP.NET in server site, then prompt message in client site using javascript

If I not mistaken (long time no use), the Javascript code to capture the confirmation is

if (confirm("Are you sure..")) {
' submit your form to server
} else {
' do nothing... you no need this block actually...:)
}
[/Quote]

vellaima · April 16, 2003

Bungpeng, to my understanding I have done the same thing as you have mentioned.

In the Page Load i have added an attribute for the "cls" button. The attribute i have added is On Clicking this button the JavaScript is getting fired. If the user clicks "Ok" then the clsthread method is executed. If he clicks "Cancel" then it is not executed.

Please do excuse me if the method of explanation is incorrect.

-Vidhya

bungpeng · April 16, 2003

How do you call "clsthread" method from javascript? As what I understand, "clsthread" is ASP.NET code right? We can't call ASP.NET function in javascript.

vellaima · April 16, 2003

I am pasting the sample code for easy understanding.

<%@ Page Language="VB" %>
<script runat="server">
   Sub Page_Load(Source As Object, E As EventArgs)
       cls.Attributes.Add("onclick","return confirm('Are you Sure you want to delete?');")
   End Sub
   
   Sub clsthread(Source As Object, E As EventArgs)
      Dim scripts as String ="<script>alert('The record is deleted')"+"</"+"script>"
      RegisterClientScriptBlock("alert1",scripts)
   End Sub

</script>
<html>
<head>
</head>
<body>
   <form runat="server">
       <asp:Button id="cls" onclick="clsthread" runat="server" Text="Close Thread"></asp:Button>
   </form>
</body>
</html>

bungpeng · April 16, 2003

No, your code won't work.

You assign 2 events to your 'cls' button, one is onclick="clsthread" and another one is through cls.Attributes.Add ... it is wrong.

My question: where are you going to place your process?

vellaima · April 16, 2003

Please do try the sample code by copying and pasting it as an aspx file. It worked perfectly for me.

vellaima · April 16, 2003

Bungpeng, please do go the following site to get the better understanding of Attributes.Add

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

bungpeng · April 16, 2003

Sorry, I am wrong from beginning, because I thought you still got problem in your code... furthermore, I thought I know quite well with web application architecture (client/server), but I dunno in ASP.NET, it was quite different... You move me to next level, TQ...

vellaima · April 16, 2003

It is fine. :)

Gertie · June 5, 2003

not working javascript confirm?

I have a button btnWis and in my page_load i try to give him a javascript to ask the user to go on or not (dutch).

But it doesn't do a thing? What have i done wrong?

btnWis.Attributes.Add("onclick", "return confirm('Bent u zeker dat u deze aanvraag wil verwijderen?');")

I've also tried

btnWis.Attributes("onclick")="javascript:return confirm('Bent u zeker dat u deze aanvraag wil verwijderen?');"

but nothing works.

ps: it worked once, but for one reason or another it stopped working?

strange!!

thx, Greetz Gertie

:-\

zy_abc · June 5, 2003

Did you use ASP Button or HTML Button? If you could post the sample code we could know where you might have gone wrong.

Gertie · June 6, 2003

I had a validator on it.

The requiredfieldvalidator, seems to change that 'onclick' event.

So it only does the validate.

Now i've turned the validation OF and made a validation in the code behind, to show a "home-made" label with "please fill in..."

Et Voila, the confirm started working!!

;)

thx Guys

beybey

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