Javascript alert message problem

Discussion in 'ASP .Net Building Controls' started by Tony Girgenti, Oct 4, 2006.

  1. Hello.

    I'm developing and testing a web application using VS.NET 2003, VB, .NET
    Framework 1.1.4322, ASP.NET 1.1.4322 and IIS5.1 on a WIN XP Pro, SP2
    computer. I'm using a web form.

    Using this line of code works great. It displays a little message box with
    the alert message in it.

    Me.btnGetArchivedTrips.Attributes.Add("onMouseOver", "alert('mouse over')")

    But how do i get it to display the alert message without doing a mouse over,
    just trying to put it into an if statement ?

    If Calendar1.SelectedDate > Me.Calendar2.SelectedDate) Then
    alert('mouse over')")
    End If

    Thanks,
    Tony
    Tony Girgenti, Oct 4, 2006
    #1
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  2. Hello Mark.

    I guess i didn't explain my problem correctly. Within the if statement, i
    just want the alert part. In other words if the startdate/enddate compare
    is true, i want a little message to pop up that indicates the problem. Like
    "Dates are incorrect".

    Thanks for your reply.

    Tony

    "Mark Rae" <> wrote in message
    news:e6Esw9$...
    > "Tony Girgenti" <tony(nospam)@lakesideos.com> wrote in message
    > news:uky2U0$...
    >
    >> Using this line of code works great. It displays a little message box
    >> with the alert message in it.
    >>
    >> Me.btnGetArchivedTrips.Attributes.Add("onMouseOver", "alert('mouse
    >> over')")
    >>
    >> But how do i get it to display the alert message without doing a mouse
    >> over, just trying to put it into an if statement ?
    >>
    >> If Calendar1.SelectedDate > Me.Calendar2.SelectedDate) Then
    >> alert('mouse over')")
    >> End If

    >
    > Er...have you tried
    >
    > If Calendar1.SelectedDate > Me.Calendar2.SelectedDate) Then
    > Me.btnGetArchivedTrips.Attributes.Add("onMouseOver", "alert('mouse
    > over')")
    > End If
    >
    >
    Tony Girgenti, Oct 4, 2006
    #2
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  3. if i know vb well enough:

    If Calendar1.SelectedDate > Me.Calendar2.SelectedDate) Then
    Page.ClientScript.RegisterClientScriptBlock(me.GetType(),"alert","alert('mouse
    over');",true)
    End If

    -- bruce (sqlwork.com)

    "Tony Girgenti" <tony(nospam)@lakesideos.com> wrote in message
    news:uky2U0$...
    > Hello.
    >
    > I'm developing and testing a web application using VS.NET 2003, VB, .NET
    > Framework 1.1.4322, ASP.NET 1.1.4322 and IIS5.1 on a WIN XP Pro, SP2
    > computer. I'm using a web form.
    >
    > Using this line of code works great. It displays a little message box
    > with the alert message in it.
    >
    > Me.btnGetArchivedTrips.Attributes.Add("onMouseOver", "alert('mouse
    > over')")
    >
    > But how do i get it to display the alert message without doing a mouse
    > over, just trying to put it into an if statement ?
    >
    > If Calendar1.SelectedDate > Me.Calendar2.SelectedDate) Then
    > alert('mouse over')")
    > End If
    >
    > Thanks,
    > Tony
    >
    bruce barker \(sqlwork.com\), Oct 5, 2006
    #3
  4. Hello Bruce.

    This is not working because the IDE is saying "ClientScript is not a member
    of System.Web.UI.Page". I can't figure out how to code it so that it is
    accepted by the coding syntax.

    Thanks,
    Tony

    "bruce barker (sqlwork.com)" <> wrote
    in message news:...
    > if i know vb well enough:
    >
    > If Calendar1.SelectedDate > Me.Calendar2.SelectedDate) Then
    >
    > Page.ClientScript.RegisterClientScriptBlock(me.GetType(),"alert","alert('mouse
    > over');",true)
    > End If
    >
    > -- bruce (sqlwork.com)
    >
    > "Tony Girgenti" <tony(nospam)@lakesideos.com> wrote in message
    > news:uky2U0$...
    >> Hello.
    >>
    >> I'm developing and testing a web application using VS.NET 2003, VB, .NET
    >> Framework 1.1.4322, ASP.NET 1.1.4322 and IIS5.1 on a WIN XP Pro, SP2
    >> computer. I'm using a web form.
    >>
    >> Using this line of code works great. It displays a little message box
    >> with the alert message in it.
    >>
    >> Me.btnGetArchivedTrips.Attributes.Add("onMouseOver", "alert('mouse
    >> over')")
    >>
    >> But how do i get it to display the alert message without doing a mouse
    >> over, just trying to put it into an if statement ?
    >>
    >> If Calendar1.SelectedDate > Me.Calendar2.SelectedDate) Then
    >> alert('mouse over')")
    >> End If
    >>
    >> Thanks,
    >> Tony
    >>

    >
    >
    Tony Girgenti, Oct 5, 2006
    #4
  5. Hello Gaurav.

    I think i understand what you are saying. Correct me if i am wrong. Are
    you saying that this part of the statement "If Calendar1.SelectedDate >
    Me.Calendar2.SelectedDate Then"
    is occurring on the server side, but this part "alert('mouse over')")" is
    happening on the client side ?

    If that's the case, then how do i go about doing this ? I tried putting it
    into the HTML, but i can't get it to execute the function.

    Thanks,
    Tony

    "Gaurav Vaish (www.EdujiniOnline.com)"
    <> wrote in message
    news:...
    >> Hello Bruce.
    >>
    >> This is not working because the IDE is saying "ClientScript is not a
    >> member of System.Web.UI.Page". I can't figure out how to code it so that
    >> it is accepted by the coding syntax.

    >
    > I think you are using ASP.Net 1.1
    >
    > Coming to your original problem:
    >
    >> If Calendar1.SelectedDate > Me.Calendar2.SelectedDate) Then
    >> alert('mouse over')")
    >> End If

    >
    > Solution suggested by Mark is correct way to go about it...
    >
    > What you are expecting above is:
    >
    > 1. Manipulation of the Data on the server side
    > 2. Alert on the client side
    >
    > => Two things happening together is not possible.
    >
    >
    > --
    > Happy Hacking,
    > Gaurav Vaish | www.mastergaurav.com
    > www.edujinionline.com
    > http://articles.edujinionline.com/webservices
    > -----------------------------------------
    >
    >
    Tony Girgenti, Oct 5, 2006
    #5
  6. Tony Girgenti

    Damien Guest

    Tony Girgenti (nospam) wrote:
    > Hello Bruce.
    >
    > This is not working because the IDE is saying "ClientScript is not a member
    > of System.Web.UI.Page". I can't figure out how to code it so that it is
    > accepted by the coding syntax.
    >
    > Thanks,
    > Tony
    >

    In 1.1, it would be


    Me.RegisterClientScriptBlock("warning","<script>alert('hello');</script>")

    Damien
    Damien, Oct 5, 2006
    #6
  7. Wow. That's great. Thanks to you and Damien for your code.

    I need to learn more about scripting, but i'm confused about all the
    scripting terminology. When i do searches for javascript, i always seem to
    get returns that involve VBscript, Jscript, javascript, client-side scripts,
    HTML etc.

    What is it that i should be looking for ? and should i be looking for a
    particular version ? Is what you did for me called "javascript" ?

    Also, the second line of the HTML code for my web page is "<!DOCTYPE HTML
    PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">". Does that mean the HTML
    version is 4.0 ?

    Any help would be gratefully appreciated.

    Thanks again,
    Tony

    "Gaurav Vaish (www.EdujiniOnline.com)"
    <> wrote in message
    news:...
    >> I think i understand what you are saying. Correct me if i am wrong. Are
    >> you saying that this part of the statement "If Calendar1.SelectedDate >
    >> Me.Calendar2.SelectedDate Then"
    >> is occurring on the server side, but this part "alert('mouse over')")" is
    >> happening on the client side ?
    >>
    >> If that's the case, then how do i go about doing this ? I tried putting
    >> it into the HTML, but i can't get it to execute the function.

    >
    > Bingo!
    > You got it right...
    >
    > You need to do something like this:
    >
    > if Calendar1.SelectedDate > Me.Calendar2.SelectedDate Then
    > Me.Page.RegisterClientScriptBlock("Unique_Name_Like_Calendar1_Error",_
    > "<script type='text/javascript'
    > language='javascript'>alert('Error in selected date');</script>")
    > End if
    >
    > What this will do is emit this script just before the end of "form"
    > element... ie, near the end of the page. And will give an alert almost
    > immediately as the page gets completely loaded.
    >
    >
    > --
    > Happy Hacking,
    > Gaurav Vaish | www.mastergaurav.com
    > www.edujinionline.com
    > http://articles.edujinionline.com/webservices
    > -----------------------------------------
    >
    >
    Tony Girgenti, Oct 9, 2006
    #7
  8. Hi,

    Gaurav Vaish (www.EdujiniOnline.com) wrote:
    > Hi Tony,


    > Forget all about VBScript, JScript... if you are looking to work with
    > them on client side -- you are tied to IE. Firefox is the recipe-of-the-day.


    Firefox still represents a minority of the browsers, and with the
    release of IE7, I think it will worsen Firefox's ratings. I personally
    like Firefox (mostly for tabbed browsing), but that will be available in
    IE too.

    Anyway, I will always recommend writing standard JavaScript, so that it
    works reasonably in all newer browsers. This is possible without major
    efforts, once you mastered the learning curve. JavaScript and the DOM
    are now standard enough that this shouldn't cause big problems. In that
    sense, I find reasonable to recommend JavaScript (i.e. Netscape's
    implementation) and JScript (i.e Microsoft's implementation), which are
    anyway almost the same.

    Also, using feature detection instead of browser detection is alwaysa
    good idea to increase compatibility, and degrade gracefully when a
    feature is not available.

    if ( document.getElementById )
    {
    document.getElementById( "myId" ).value = "...";
    }
    else
    {
    // Inform user or use another way.
    }

    HTH,
    Laurent
    --
    Laurent Bugnion, GalaSoft
    Software engineering: http://www.galasoft-LB.ch
    PhotoAlbum: http://www.galasoft-LB.ch/pictures
    Support children in Calcutta: http://www.calcutta-espoir.ch
    Laurent Bugnion, Oct 10, 2006
    #8
  9. Thanks to Gaurav and Laurent for their replies. I have a lot of learning to
    do.

    Tony

    "Laurent Bugnion" <> wrote in message
    news:u%...
    > Hi,
    >
    > Gaurav Vaish (www.EdujiniOnline.com) wrote:
    >> Hi Tony,

    >
    >> Forget all about VBScript, JScript... if you are looking to work with
    >> them on client side -- you are tied to IE. Firefox is the
    >> recipe-of-the-day.

    >
    > Firefox still represents a minority of the browsers, and with the release
    > of IE7, I think it will worsen Firefox's ratings. I personally like
    > Firefox (mostly for tabbed browsing), but that will be available in IE
    > too.
    >
    > Anyway, I will always recommend writing standard JavaScript, so that it
    > works reasonably in all newer browsers. This is possible without major
    > efforts, once you mastered the learning curve. JavaScript and the DOM are
    > now standard enough that this shouldn't cause big problems. In that sense,
    > I find reasonable to recommend JavaScript (i.e. Netscape's implementation)
    > and JScript (i.e Microsoft's implementation), which are anyway almost the
    > same.
    >
    > Also, using feature detection instead of browser detection is alwaysa good
    > idea to increase compatibility, and degrade gracefully when a feature is
    > not available.
    >
    > if ( document.getElementById )
    > {
    > document.getElementById( "myId" ).value = "...";
    > }
    > else
    > {
    > // Inform user or use another way.
    > }
    >
    > HTH,
    > Laurent
    > --
    > Laurent Bugnion, GalaSoft
    > Software engineering: http://www.galasoft-LB.ch
    > PhotoAlbum: http://www.galasoft-LB.ch/pictures
    > Support children in Calcutta: http://www.calcutta-espoir.ch
    Tony Girgenti, Oct 10, 2006
    #9
  10. Gaurav.

    One thing i don't understand is "Forget all about VBScript, JScript". If
    JScript is Microsoft's implementation of JavaScript and i am using VS.NET
    2003, then why not use JScript ?

    I'm sure you have a good reason, but i am puzzled by that.

    Thanks,
    Tony

    "Gaurav Vaish (www.EdujiniOnline.com)"
    <> wrote in message
    news:...
    > Hi Tony,
    >
    >> I need to learn more about scripting, but i'm confused about all the
    >> scripting terminology. When i do searches for javascript, i always seem
    >> to get returns that involve VBscript, Jscript, javascript, client-side
    >> scripts, HTML etc.

    >
    > Forget all about VBScript, JScript... if you are looking to work with
    > them on client side -- you are tied to IE. Firefox is the
    > recipe-of-the-day.
    >
    >> What is it that i should be looking for ? and should i be looking for a
    >> particular version ? Is what you did for me called "javascript" ?

    >
    > If I recall correctly, Javascript 1.6 is the latest... albeit 1.2+
    > should be good enough for quite a few practical purposes.
    >
    >> Also, the second line of the HTML code for my web page is "<!DOCTYPE HTML
    >> PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">". Does that mean the
    >> HTML version is 4.0 ?

    >
    > HTML 4.0 "Transitional" meaning that somethings like "<br>", "<img>"
    > etc will go without warnings where in XHTML mode it has to be "<br />",
    > "<img ... />".
    >
    > I would suggest you to have a look into the topic of "XML", "DTD" and
    > "XSD" and then also look into "HTML" and "its DTD".
    >
    > For advanced processing on client-side, additional topics would be
    > Javascript, DOM Level 3 API.
    >
    > All of this is available on www.w3.org. This spectrum will give you a
    > complete understanding of the "web applications", how they function, what
    > all things you should take care of / note of etc when designing the
    > "server side" and the "client side" of your application.
    >
    >> Any help would be gratefully appreciated.

    >
    > Hope that helps!
    >
    >> Thanks again,

    >
    > Most welcome!
    >
    >
    > --
    > Happy Hacking,
    > Gaurav Vaish | www.mastergaurav.com
    > www.edujinionline.com
    > http://eduzine.edujinionline.com
    > -----------------------------------------
    >
    >
    Tony Girgenti, Oct 10, 2006
    #10
  11. Hi,

    Tony Girgenti wrote:
    > Gaurav.
    >
    > One thing i don't understand is "Forget all about VBScript, JScript". If
    > JScript is Microsoft's implementation of JavaScript and i am using VS.NET
    > 2003, then why not use JScript ?
    >
    > I'm sure you have a good reason, but i am puzzled by that.
    >
    > Thanks,
    > Tony


    I agree. See my post in the same thread. Better learn and program
    against standards, instead of concentrating on one browser only,
    whichever that is.

    HTH,
    Laurent
    --
    Laurent Bugnion, GalaSoft
    Software engineering: http://www.galasoft-LB.ch
    PhotoAlbum: http://www.galasoft-LB.ch/pictures
    Support children in Calcutta: http://www.calcutta-espoir.ch
    Laurent Bugnion, Oct 10, 2006
    #11
  12. Hi,

    Gaurav Vaish (www.EdujiniOnline.com) wrote:
    >> Firefox still represents a minority of the browsers, and with the release
    >> of IE7, I think it will worsen Firefox's ratings. I personally like
    >> Firefox (mostly for tabbed browsing), but that will be available in IE
    >> too.

    >
    > Two things:
    > 1. I still won't leave that "millions of users" audience


    I am not sure if you're stubborn on purpose, or if you really don't
    understand what I say.

    You advised the OP to abandon JScript and learn only JavaScript. In
    other words, you recommended to stop developing for IE and develop only
    for Mozilla-based browsers.

    My recommendation is to not develop for one browser in particular, but
    to use standard constructs and feature detection to make code compatible
    with all major browsers.

    Noone asks you to leave any audience. By using standards you can win
    both worlds easily. Why would you want to do anything else?

    > 2. Firefox is anyway more secure as compared to IE. Well, at least I have
    > more faith in it :)


    Once again, noone asked you to leave anything aside. Besides, your
    personal preference is totally irrelevant, as you don't develop websites
    for yourself but for users, who may have other preferences.

    If you were a cook and only baked chocolate pies because that's what you
    prefer, you wouldn't have many customers.

    HTH,
    Laurent
    --
    Laurent Bugnion, GalaSoft
    Software engineering: http://www.galasoft-LB.ch
    PhotoAlbum: http://www.galasoft-LB.ch/pictures
    Support children in Calcutta: http://www.calcutta-espoir.ch
    Laurent Bugnion, Oct 11, 2006
    #12
  13. Hi,

    Gaurav Vaish (www.EdujiniOnline.com) wrote:
    >> I am not sure if you're stubborn on purpose, or if you really don't
    >> understand what I say.

    >
    > Should be the second part. :)


    That's my guess too ;-)


    > btw, still wondering why go for JScript when JavaScript should be just
    > enough... Or again, I'm really not understanding something :D


    JScript is Microsoft's implementation of ECMAScript. You use JScript
    when you program a script which runs in Internet Explorer.

    JavaScript is Microsoft's implementation of ECMAScript. You use
    JavaScript when you program a script which runs in Mozilla-based
    browsers (Firefox, Netscape, Mozilla...).

    If you program only JavaScript, but no JScript, it's the same as saying
    that you want to program only in Mozilla-based browsers, and
    deliberately ignore IE.

    What I am saying is that it's easy enough to have good script working in
    both browsers. So I don't see the need to ignore IE.

    HTH,
    Laurent
    --
    Laurent Bugnion, GalaSoft
    Software engineering: http://www.galasoft-LB.ch
    PhotoAlbum: http://www.galasoft-LB.ch/pictures
    Support children in Calcutta: http://www.calcutta-espoir.ch
    Laurent Bugnion, Oct 16, 2006
    #13
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