What does this ClientScriptManager code do??

[AAaron123]

I read the help on which says:

The ClientScriptMan ager class is used to manage client-side scripts and add
them to Web applications...


But could use a little help. Can someone tell me what the code below is used
for?

If you could just put a few comments into the code that would help.

Is this code requires when ever the <scripttag is used?

The last line appears to relate to the following, but what does it do?

<asp:Image ID="MasterChurc hImage" runat="server" AlternateText=" Church
Image" ImageUrl="~/Images/MasterChurchIma ge.jpg" />

THANKS for any insight



Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArg s)
Handles Me.Load

Dim csname2 As String = "ButtonClickScr ipt"

Dim cstype As Type = Me.GetType()



Dim cs As ClientScriptMan ager = Page.ClientScri pt



' Check to see if the client script is already registered.

If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then

Dim cstext2 As New StringBuilder()

cstext2.Append( "<script type=text/javascriptfunct ion DoClick() {")

cstext2.Append( "Form1.Message. value='Text from client script.'} </")

cstext2.Append( "script>")

cs.RegisterClie ntScriptBlock(c stype, csname2, cstext2.ToStrin g(), False)

End If

MasterChurchIma ge.Attributes.A dd("onload", "resizeImg( '" +
MasterChurchIma ge.ClientID + "')")

End Sub

[Cowboy \(Gregory A. Beamer\)]

Re: What does this ClientScriptMan ager code do??

Client script manager adds JavaScript to the page. It can be added in the
header or in the body, depending on which method you use.

The last lines here are adding an attibute to the MasterChurch image, which
is a way to add elements not recognized on the ASP.NET image tag which are
available in HTML. In particular, this addition adds an onload event handler
to the image tag. Examine the source when you run the page and you will see

<img onload="resizeI mg('1')>

plus more (I purposely avoided writing the whole thing).

--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA

Subscribe to my blog

http://gregorybeamer.spaces.live.com/lists/feed.rss

or just read it:

http://gregorybeamer.spaces.live.com/

*************** *************** **************
| Think outside the box! |
*************** *************** **************
"AAaron123" <aaaron123@road runner.comwrote in message
news:ufm33wq7IH A.2348@TK2MSFTN GP06.phx.gbl...

>I read the help on which says:
>
The ClientScriptMan ager class is used to manage client-side scripts and
add them to Web applications...
>
>
But could use a little help. Can someone tell me what the code below is
used for?
>
If you could just put a few comments into the code that would help.
>
Is this code requires when ever the <scripttag is used?
>
The last line appears to relate to the following, but what does it do?
>
<asp:Image ID="MasterChurc hImage" runat="server" AlternateText=" Church
Image" ImageUrl="~/Images/MasterChurchIma ge.jpg" />
>
THANKS for any insight
>
>
>
Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArg s) Handles Me.Load
>
Dim csname2 As String = "ButtonClickScr ipt"
>
Dim cstype As Type = Me.GetType()
>
>
>
Dim cs As ClientScriptMan ager = Page.ClientScri pt
>
>
>
' Check to see if the client script is already registered.
>
If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then
>
Dim cstext2 As New StringBuilder()
>
cstext2.Append( "<script type=text/javascriptfunct ion DoClick() {")
>
cstext2.Append( "Form1.Message. value='Text from client script.'} </")
>
cstext2.Append( "script>")
>
cs.RegisterClie ntScriptBlock(c stype, csname2, cstext2.ToStrin g(), False)
>
End If
>
MasterChurchIma ge.Attributes.A dd("onload", "resizeImg( '" +
MasterChurchIma ge.ClientID + "')")
>
End Sub
>
>

[AAaron123]

Re: What does this ClientScriptMan ager code do??

Thanks for the clear description. Now I read the Help again and see if it
now makes sense. I run this in
the Page_Load event.


I've tried and it appears that you can have multiple blocks like this each
with a different csname* and cstext*. Correct?



If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then

Dim cstext2 As New StringBuilder()

snip...

cs.RegisterClie ntScriptBlock(c stype, csname2, cstext2.ToStrin g(), False)

End If

MasterChurchIma ge.Attributes.A dd("onload", "resizeImg( '" +
MasterChurchIma ge.ClientID + "')")


Also, the ...Attributes.A dd is outside the If..
If that is correct it appears register should be done only once but the Add
each time the page is loaded. Correct?


Thanks again


"Cowboy (Gregory A. Beamer)" <NoSpamMgbworld @comcast.netNoS pamMwrote in
message news:%23T70frs7 IHA.2224@TK2MSF TNGP05.phx.gbl. ..

Client script manager adds JavaScript to the page. It can be added in the
header or in the body, depending on which method you use.
>
The last lines here are adding an attibute to the MasterChurch image,
which is a way to add elements not recognized on the ASP.NET image tag
which are available in HTML. In particular, this addition adds an onload
event handler to the image tag. Examine the source when you run the page
and you will see
>
<img onload="resizeI mg('1')>
>
plus more (I purposely avoided writing the whole thing).
>
--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA
>
Subscribe to my blog

http://gregorybeamer.spaces.live.com/lists/feed.rss

>
or just read it:

http://gregorybeamer.spaces.live.com/

>
*************** *************** **************
| Think outside the box! |
*************** *************** **************
"AAaron123" <aaaron123@road runner.comwrote in message
news:ufm33wq7IH A.2348@TK2MSFTN GP06.phx.gbl...

>>I read the help on which says:
>>
>The ClientScriptMan ager class is used to manage client-side scripts and
>add them to Web applications...
>>
>>
>But could use a little help. Can someone tell me what the code below is
>used for?
>>
>If you could just put a few comments into the code that would help.
>>
>Is this code requires when ever the <scripttag is used?
>>
>The last line appears to relate to the following, but what does it do?
>>
><asp:Image ID="MasterChurc hImage" runat="server" AlternateText=" Church
>Image" ImageUrl="~/Images/MasterChurchIma ge.jpg" />
>>
>THANKS for any insight
>>
>>
>>
>Protected Sub Page_Load(ByVal sender As Object, ByVal e As
>System.EventAr gs) Handles Me.Load
>>
>Dim csname2 As String = "ButtonClickScr ipt"
>>
>Dim cstype As Type = Me.GetType()
>>
>>
>>
>Dim cs As ClientScriptMan ager = Page.ClientScri pt
>>
>>
>>
>' Check to see if the client script is already registered.
>>
>If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then
>>
>Dim cstext2 As New StringBuilder()
>>
>cstext2.Append ("<script type=text/javascriptfunct ion DoClick() {")
>>
>cstext2.Append ("Form1.Message .value='Text from client script.'} </")
>>
>cstext2.Append ("script>")
>>
>cs.RegisterCli entScriptBlock( cstype, csname2, cstext2.ToStrin g(), False)
>>
>End If
>>
>MasterChurchIm age.Attributes. Add("onload", "resizeImg( '" +
>MasterChurchIm age.ClientID + "')")
>>
>End Sub
>>
>>

>

[bruce barker]

Re: What does this ClientScriptMan ager code do??

the if is just to test if the register call has already been made. you
are confusing two unrelated bits of javascript code.

the RegisterScriptB lock is used to render a javascript routine named
DoClick(). the second attaches an event handler (resizeImg) to an images
load event.

-- bruce (sqlwork.com)



AAaron123 wrote:

Thanks for the clear description. Now I read the Help again and see if it
now makes sense. I run this in
the Page_Load event.
>
>
I've tried and it appears that you can have multiple blocks like this each
with a different csname* and cstext*. Correct?
>
>
>
If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then
>
Dim cstext2 As New StringBuilder()
>
snip...
>
cs.RegisterClie ntScriptBlock(c stype, csname2, cstext2.ToStrin g(), False)
>
End If
>
MasterChurchIma ge.Attributes.A dd("onload", "resizeImg( '" +
MasterChurchIma ge.ClientID + "')")
>
>
Also, the ...Attributes.A dd is outside the If..
If that is correct it appears register should be done only once but the Add
each time the page is loaded. Correct?
>
>
Thanks again
>
>
"Cowboy (Gregory A. Beamer)" <NoSpamMgbworld @comcast.netNoS pamMwrote in
message news:%23T70frs7 IHA.2224@TK2MSF TNGP05.phx.gbl. ..

>Client script manager adds JavaScript to the page. It can be added in the
>header or in the body, depending on which method you use.
>>
>The last lines here are adding an attibute to the MasterChurch image,
>which is a way to add elements not recognized on the ASP.NET image tag
>which are available in HTML. In particular, this addition adds an onload
>event handler to the image tag. Examine the source when you run the page
>and you will see
>>
><img onload="resizeI mg('1')>
>>
>plus more (I purposely avoided writing the whole thing).
>>
>--
>Gregory A. Beamer
>MVP, MCP: +I, SE, SD, DBA
>>
>Subscribe to my blog
>http://gregorybeamer.spaces.live.com/lists/feed.rss
>>
>or just read it:
>http://gregorybeamer.spaces.live.com/
>>
>************** *************** ***************
>| Think outside the box! |
>************** *************** ***************
>"AAaron123" <aaaron123@road runner.comwrote in message
>news:ufm33wq7I HA.2348@TK2MSFT NGP06.phx.gbl.. .

>>I read the help on which says:
>>>
>>The ClientScriptMan ager class is used to manage client-side scripts and
>>add them to Web applications...
>>>
>>>
>>But could use a little help. Can someone tell me what the code below is
>>used for?
>>>
>>If you could just put a few comments into the code that would help.
>>>
>>Is this code requires when ever the <scripttag is used?
>>>
>>The last line appears to relate to the following, but what does it do?
>>>
>><asp:Image ID="MasterChurc hImage" runat="server" AlternateText=" Church
>>Image" ImageUrl="~/Images/MasterChurchIma ge.jpg" />
>>>
>>THANKS for any insight
>>>
>>>
>>>
>>Protected Sub Page_Load(ByVal sender As Object, ByVal e As
>>System.EventA rgs) Handles Me.Load
>>>
>>Dim csname2 As String = "ButtonClickScr ipt"
>>>
>>Dim cstype As Type = Me.GetType()
>>>
>>>
>>>
>>Dim cs As ClientScriptMan ager = Page.ClientScri pt
>>>
>>>
>>>
>>' Check to see if the client script is already registered.
>>>
>>If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then
>>>
>>Dim cstext2 As New StringBuilder()
>>>
>>cstext2.Appen d("<script type=text/javascriptfunct ion DoClick() {")
>>>
>>cstext2.Appen d("Form1.Messag e.value='Text from client script.'} </")
>>>
>>cstext2.Appen d("script>")
>>>
>>cs.RegisterCl ientScriptBlock (cstype, csname2, cstext2.ToStrin g(), False)
>>>
>>End If
>>>
>>MasterChurchI mage.Attributes .Add("onload", "resizeImg( '" +
>>MasterChurchI mage.ClientID + "')")
>>>
>>End Sub
>>>
>>>

>
>

[AAaron123]

Re: What does this ClientScriptMan ager code do??

I guess you're right I am confused.

For example, I have the following which works but I don't know why.

When I open the page the dialogbox does show.

I think I'm registering the script for PopupScript but I'd expect to have to
"call" it some place.

Registering doesn't cause it to execute does it?

Thanks for the interest



Partial Class Default_aspx

Inherits System.Web.UI.P age



Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArg s)
Handles Me.Load

Dim csname1 As String = "PopupScrip t"

Dim cstype As Type = Me.GetType()

Dim csm As ClientScriptMan ager = Page.ClientScri pt

If (Not csm.IsStartupSc riptRegistered( cstype, csname1)) Then

Dim cstext1 As New StringBuilder()

cstext1.Append( "alert('Thi s sites...es with text.');")

csm.RegisterSta rtupScript(csty pe, csname1, cstext1.ToStrin g, True)

End If

End Sub

End Class

[AAaron123]

Re: What does this ClientScriptMan ager code do??

In my other reply I should have mentioned that the below helped a lot.
You're right, I was trying to tie the two together and couldn't do it.

thanks again


"bruce barker" <nospam@nospam. comwrote in message
news:uZ3ZyYB8IH A.1192@TK2MSFTN GP05.phx.gbl...

the if is just to test if the register call has already been made. you are
confusing two unrelated bits of javascript code.
>
the RegisterScriptB lock is used to render a javascript routine named
DoClick(). the second attaches an event handler (resizeImg) to an images
load event.
>
-- bruce (sqlwork.com)
>
>
>

[Cowboy \(Gregory A. Beamer\)]

Re: What does this ClientScriptMan ager code do??

You have two concepts here, as I see it:

Emitting blocks of JavaScript
Adding attributes to tags

Blocks of JavaScript can be created in a variety of ways. For example, you
can do something like this:

string code = "{block of code here}";
Literal lit = new Literal(code);
Page.Controls.A dd(lit);

There is probably a mistake in that code, as I am just writing on the fly,
but it is one way to add JavaScript. The emit methods, like
RegisterClientS criptBlock are better, as you end up placing a script block
either a) at the top of the page or b) inline. There are two primary methods
here (on the ClientScriptMan ager class):

RegisterStartup Script
RegisterClientS criptBlock

But you can also avail youself of RegisterClientS criptInclude,
RegisterClientS criptResource, etc. All fo the methods are here:

http://msdn.microsoft.com/en-us/library/system.web.ui.clientscriptmanager_methods.aspx

That pretty covers outputting blocks, so to the attributes adding. This is a
way of adding tags not normally exposed by the ASP.NET classes. For example,
the code, you show sets up the following on the image:

onload="resizeI mg('1')"

--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA

Subscribe to my blog

http://gregorybeamer.spaces.live.com/lists/feed.rss

or just read it:

http://gregorybeamer.spaces.live.com/

*************** *************** **************
| Think outside the box! |
*************** *************** **************
"AAaron123" <aaaron123@road runner.comwrote in message
news:ux%23temz7 IHA.5596@TK2MSF TNGP02.phx.gbl. ..

Thanks for the clear description. Now I read the Help again and see if it
now makes sense. I run this in
the Page_Load event.
>
>
I've tried and it appears that you can have multiple blocks like this each
with a different csname* and cstext*. Correct?
>
>
>
If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then
>
Dim cstext2 As New StringBuilder()
>
snip...
>
cs.RegisterClie ntScriptBlock(c stype, csname2, cstext2.ToStrin g(), False)
>
End If
>
MasterChurchIma ge.Attributes.A dd("onload", "resizeImg( '" +
MasterChurchIma ge.ClientID + "')")
>
>
Also, the ...Attributes.A dd is outside the If..
If that is correct it appears register should be done only once but the
Add each time the page is loaded. Correct?
>
>
Thanks again
>
>
"Cowboy (Gregory A. Beamer)" <NoSpamMgbworld @comcast.netNoS pamMwrote in
message news:%23T70frs7 IHA.2224@TK2MSF TNGP05.phx.gbl. ..

>Client script manager adds JavaScript to the page. It can be added in the
>header or in the body, depending on which method you use.
>>
>The last lines here are adding an attibute to the MasterChurch image,
>which is a way to add elements not recognized on the ASP.NET image tag
>which are available in HTML. In particular, this addition adds an onload
>event handler to the image tag. Examine the source when you run the page
>and you will see
>>
><img onload="resizeI mg('1')>
>>
>plus more (I purposely avoided writing the whole thing).
>>
>--
>Gregory A. Beamer
>MVP, MCP: +I, SE, SD, DBA
>>
>Subscribe to my blog
>http://gregorybeamer.spaces.live.com/lists/feed.rss
>>
>or just read it:
>http://gregorybeamer.spaces.live.com/
>>
>************** *************** ***************
>| Think outside the box! |
>************** *************** ***************
>"AAaron123" <aaaron123@road runner.comwrote in message
>news:ufm33wq7I HA.2348@TK2MSFT NGP06.phx.gbl.. .

>>>I read the help on which says:
>>>
>>The ClientScriptMan ager class is used to manage client-side scripts and
>>add them to Web applications...
>>>
>>>
>>But could use a little help. Can someone tell me what the code below is
>>used for?
>>>
>>If you could just put a few comments into the code that would help.
>>>
>>Is this code requires when ever the <scripttag is used?
>>>
>>The last line appears to relate to the following, but what does it do?
>>>
>><asp:Image ID="MasterChurc hImage" runat="server" AlternateText=" Church
>>Image" ImageUrl="~/Images/MasterChurchIma ge.jpg" />
>>>
>>THANKS for any insight
>>>
>>>
>>>
>>Protected Sub Page_Load(ByVal sender As Object, ByVal e As
>>System.EventA rgs) Handles Me.Load
>>>
>>Dim csname2 As String = "ButtonClickScr ipt"
>>>
>>Dim cstype As Type = Me.GetType()
>>>
>>>
>>>
>>Dim cs As ClientScriptMan ager = Page.ClientScri pt
>>>
>>>
>>>
>>' Check to see if the client script is already registered.
>>>
>>If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then
>>>
>>Dim cstext2 As New StringBuilder()
>>>
>>cstext2.Appen d("<script type=text/javascriptfunct ion DoClick() {")
>>>
>>cstext2.Appen d("Form1.Messag e.value='Text from client script.'} </")
>>>
>>cstext2.Appen d("script>")
>>>
>>cs.RegisterCl ientScriptBlock (cstype, csname2, cstext2.ToStrin g(), False)
>>>
>>End If
>>>
>>MasterChurchI mage.Attributes .Add("onload", "resizeImg( '" +
>>MasterChurchI mage.ClientID + "')")
>>>
>>End Sub
>>>
>>>

>>

>
>

[AAaron123]

Re: What does this ClientScriptMan ager code do??

thanks a lot

"Cowboy (Gregory A. Beamer)" <NoSpamMgbworld @comcast.netNoS pamMwrote in
message news:uyanKTY8IH A.4608@TK2MSFTN GP06.phx.gbl...

You have two concepts here, as I see it:
>
Emitting blocks of JavaScript
Adding attributes to tags
>
Blocks of JavaScript can be created in a variety of ways. For example, you
can do something like this:
>
string code = "{block of code here}";
Literal lit = new Literal(code);
Page.Controls.A dd(lit);
>
There is probably a mistake in that code, as I am just writing on the fly,
but it is one way to add JavaScript. The emit methods, like
RegisterClientS criptBlock are better, as you end up placing a script block
either a) at the top of the page or b) inline. There are two primary
methods here (on the ClientScriptMan ager class):
>
RegisterStartup Script
RegisterClientS criptBlock
>
But you can also avail youself of RegisterClientS criptInclude,
RegisterClientS criptResource, etc. All fo the methods are here:

http://msdn.microsoft.com/en-us/library/system.web.ui.clientscriptmanager_methods.aspx

>
That pretty covers outputting blocks, so to the attributes adding. This is
a way of adding tags not normally exposed by the ASP.NET classes. For
example, the code, you show sets up the following on the image:
>
onload="resizeI mg('1')"
>
--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA
>
Subscribe to my blog

http://gregorybeamer.spaces.live.com/lists/feed.rss

>
or just read it:

http://gregorybeamer.spaces.live.com/

>
*************** *************** **************
| Think outside the box! |
*************** *************** **************
"AAaron123" <aaaron123@road runner.comwrote in message
news:ux%23temz7 IHA.5596@TK2MSF TNGP02.phx.gbl. ..

>Thanks for the clear description. Now I read the Help again and see if it
>now makes sense. I run this in
>the Page_Load event.
>>
>>
>I've tried and it appears that you can have multiple blocks like this
>each with a different csname* and cstext*. Correct?
>>
>>
>>
>If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then
>>
>Dim cstext2 As New StringBuilder()
>>
>snip...
>>
>cs.RegisterCli entScriptBlock( cstype, csname2, cstext2.ToStrin g(), False)
>>
>End If
>>
>MasterChurchIm age.Attributes. Add("onload", "resizeImg( '" +
>MasterChurchIm age.ClientID + "')")
>>
>>
>Also, the ...Attributes.A dd is outside the If..
>If that is correct it appears register should be done only once but the
>Add each time the page is loaded. Correct?
>>
>>
>Thanks again
>>
>>
>"Cowboy (Gregory A. Beamer)" <NoSpamMgbworld @comcast.netNoS pamMwrote in
>message news:%23T70frs7 IHA.2224@TK2MSF TNGP05.phx.gbl. ..

>>Client script manager adds JavaScript to the page. It can be added in
>>the header or in the body, depending on which method you use.
>>>
>>The last lines here are adding an attibute to the MasterChurch image,
>>which is a way to add elements not recognized on the ASP.NET image tag
>>which are available in HTML. In particular, this addition adds an onload
>>event handler to the image tag. Examine the source when you run the page
>>and you will see
>>>
>><img onload="resizeI mg('1')>
>>>
>>plus more (I purposely avoided writing the whole thing).
>>>
>>--
>>Gregory A. Beamer
>>MVP, MCP: +I, SE, SD, DBA
>>>
>>Subscribe to my blog
>>http://gregorybeamer.spaces.live.com/lists/feed.rss
>>>
>>or just read it:
>>http://gregorybeamer.spaces.live.com/
>>>
>>************* *************** *************** *
>>| Think outside the box! |
>>************* *************** *************** *
>>"AAaron123" <aaaron123@road runner.comwrote in message
>>news:ufm33wq7 IHA.2348@TK2MSF TNGP06.phx.gbl. ..
>>>>I read the help on which says:
>>>>
>>>The ClientScriptMan ager class is used to manage client-side scripts and
>>>add them to Web applications...
>>>>
>>>>
>>>But could use a little help. Can someone tell me what the code below is
>>>used for?
>>>>
>>>If you could just put a few comments into the code that would help.
>>>>
>>>Is this code requires when ever the <scripttag is used?
>>>>
>>>The last line appears to relate to the following, but what does it do?
>>>>
>>><asp:Image ID="MasterChurc hImage" runat="server" AlternateText=" Church
>>>Image" ImageUrl="~/Images/MasterChurchIma ge.jpg" />
>>>>
>>>THANKS for any insight
>>>>
>>>>
>>>>
>>>Protected Sub Page_Load(ByVal sender As Object, ByVal e As
>>>System.Event Args) Handles Me.Load
>>>>
>>>Dim csname2 As String = "ButtonClickScr ipt"
>>>>
>>>Dim cstype As Type = Me.GetType()
>>>>
>>>>
>>>>
>>>Dim cs As ClientScriptMan ager = Page.ClientScri pt
>>>>
>>>>
>>>>
>>>' Check to see if the client script is already registered.
>>>>
>>>If (Not cs.IsClientScri ptBlockRegister ed(cstype, csname2)) Then
>>>>
>>>Dim cstext2 As New StringBuilder()
>>>>
>>>cstext2.Appe nd("<script type=text/javascriptfunct ion DoClick() {")
>>>>
>>>cstext2.Appe nd("Form1.Messa ge.value='Text from client script.'} </")
>>>>
>>>cstext2.Appe nd("script>")
>>>>
>>>cs.RegisterC lientScriptBloc k(cstype, csname2, cstext2.ToStrin g(),
>>>False)
>>>>
>>>End If
>>>>
>>>MasterChurch Image.Attribute s.Add("onload", "resizeImg( '" +
>>>MasterChurch Image.ClientID + "')")
>>>>
>>>End Sub
>>>>
>>>>
>>>

>>
>>

>