[Solved] Suppress ClientEvents on Page_Load

[Michael]

Hello!

I have an ASP.NET-Button shipped with VS. This button is responsible for saving the data the user enters in the form. When the Page is loaded, the button should be disabled. Then I have other controls (standard VS controls), where I have "linked" the client-side onpropertychange() event. When a user for example fills out a javascript-enabled textbox, the javascript-function will enable the Save-Button. Everything is fine.

When I now - for example - use RadTextBox and link the ClientEvents-OnValueChanged with the same javascript-function, the page loads and I can see, that the Save-Button is automatically enabled?!?

Is it possible, that RadControls do not fire javascript-events on Page_Load? Are there any workarounds?

Bye

Michael

[Nikolay Rusev]

Hello Michael,

The code bellow will switch the Button control int enabled mode whenever you change the text of RadTextBox, not on initial load:

01.<form id="form1" runat="server">
02.    <asp:ScriptManager runat="server" ID="ScriptManager1"></asp:ScriptManager>
03.    <div>
04.    <telerik:RadTextBox runat="server" ID="Box1" >
05.        <ClientEvents OnValueChanged="function(){$get('Button1').disabled = '';}"/>
06.    </telerik:RadTextBox>
07.
08.    <asp:Button runat="server" ID="Button1" Text="Save" Enabled="false"/>
09.    </div>
10.    </form>

I hope this helps.

Regards,
Nikolay
the Telerik team

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[Michael]

Hi!

Sorry, but it did not help. My code is nearly the same:

function

 

Aenderung() {

 

 

     obj = document.getElementById(

"<%= btSpeichernAktualisieren.ClientID %>");

 

 

     obj.disabled =

'';

 

 

 

}

...

 

 

 <

 

asp:Button ID="btSpeichernAktualisieren" runat="server" CommandArgument="Insert" OnCommand="btSpeichernAktualisieren_Command" Text="Speichern/Aktualisieren" Visible="false" />
==> the Button is set to Visible = true and Enabled = false in the Page_Load-Event
...
 <telerik:RadTextBox ID="rtbKapitel" runat="server" Skin="WebBlue" Width="100px" > 

 

 

    <ClientEvents OnValueChanged="Aenderung()" />

 <

 

/telerik:RadTextBox>
...
<asp:TextBox ID="TextBox1" runat="server" onchange="Aenderung()"></asp:TextBox> 


When I now load the page, the button "btSpeichernAktualisieren" is enabled?!?!? When I delete the code line  <ClientEvents OnValueChanged="Aenderung()" /> and I try again, the button is disabled after Page_Load!! As recently as I change the content of the TextBox1 and thisTextBox1 lost the focus, the Button btSpeichernAktualisieren gets enabled. This is the behaviour I also want by the Telerik-Controls!!!

Please help me!

Kind regards

Michael

 

 

 

 

[Nikolay Rusev]

Hello Michael,

For your convenience I am attaching sample project utilizing the code from my last replay.
It demonstrates that "Changed" event will not be triggered until you change the value inside RadTextBox.

Regards,
Nikolay
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.