Hi All,

I have a page that simply has a button on it. In the button click event of the aspx.vb I attempt to disable the button before calling a procedure. The button does not disable until it's come out of the click event which defeates my purpose.

This is for obvious reasons because you have to wait for the server procedure to finish before the btn.enabled=false; command gets sent to the browser. To get around this, you will need to use some javascript. You can do something like this:

string sJavaScript = "";
sJavaScript = "if (typeof(Page_ClientValidate) == 'function') { ";
sJavaScript += "if (Page_ClientValidate() == false) { return false; }} ";
sJavaScript += "this.value = 'Please wait...';";
sJavaScript += "this.disabled = true;";
sJavaScript += Page.GetPostBackEventReference(this.btn);
sJavaScript += ";";
btn.Attributes.Add("onClick", sJavaScript);

hth.

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Discussion:
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Ok thanks, you've pointed me in the right direction. I've placed an onclickclient event and then created the following:

<script type="text/VBscript">
        sub DisableMe()
            btnCapture.Enabled = false
       end sub
</script>

When I press my button it drops into this event, but errors saying that btn Capture is an invalid object, but thats the name of my button

I am not sure what you are trying to achieve now. The above script will only disable the button but not raise a server side event??

The code I supplied above will disable the button and raise your server side click event and you do not need to supply a client side script block.

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Discussion:
http://p2p.wrox.com/topic.asp?TOPIC_ID=56429

Hi dparsons, Sorry you are correct in what I am trying to achieve. Should I place the javescript in a function and call it on the onclick event?

Hi dParsons,

it's nearly working, but this the compiler doesnt like

sJavaScript += Page.GetPostBackEventReference(this.btn);

searching the web, it appears that under asp2.0 GetPostBackEventReference now comes in the ClientScriptManager class, however I'm struggling to implement this within the Javascript. If you have any more thoughts on this, it would be much appreciated

Sorry that was 1.x code, in 2.0 it should be Page.ClientScript.GetPostBackEventReference

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Read this if you want to know how to get a correct reply for your question:
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^^Modified text taken from gbianchi profile^^
================================================== =========
Technical Editor for: Professional Search Engine Optimization with ASP.NET
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http://www.codinghorror.com/blog/archives/000781.html
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hi, I tried your suggestion, but it didnt like it. However, I've changed it to this and it works.

        Dim cs As ClientScriptManager = Page.ClientScript
        Dim sJavaScript As String = ""
        sJavaScript = "if (typeof(Page_ClientValidate) == 'function') { "
        sJavaScript += "if (Page_ClientValidate() == false) { return false; }} "
        sJavaScript += "this.value = 'Please wait...';"
        sJavaScript += "this.disabled = true;"
        sJavaScript += cs.GetPostBackEventReference(btnCapture, "")
        sJavaScript += ";"
        btnCapture.Attributes.Add("onClick", sJavaScript)

Thanks very much for your help i'd never have got this under my own steam.

No problem, glad you got it working.

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Read this if you want to know how to get a correct reply for your question:
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^^Took that from planoie's profile^^
^^Modified text taken from gbianchi profile^^
================================================== =========
Technical Editor for: Professional Search Engine Optimization with ASP.NET
http://www.wiley.com/WileyCDA/WileyT...470131470.html
================================================== =========
Why can't Programmers, program??
http://www.codinghorror.com/blog/archives/000781.html
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