ASP.Net 1.1-- calling Javascript from within a method?

Steve Hershoff

Hi everyone,

We have a javascript function we'd like to call from within a C# method in
our code-behind file. The way it has worked historically is we'd call the
method from a hyperlink, like this:

<a href='javascript:MyMethod(Param1, Param2)' runat="server"
ID="MyLink">click here</a>

....what I'd like to do now is somehow call "MyMethod" from the code-behind
file. I've tried something like this but it doesn't do anything, as best I
can tell.

void JavaScriptTest()
{

Response.Write("<script language='javascript'>");
Response.Write("MyMethod(Param1, Param2);");
Response.Write("<"+"/script>");
}

If I replace the MyMethod line above with something like a vanilla
window.alert(), it does work, so I figure I must be close to an answer?

Oct 11 '07 #1

Subscribe Reply

5603

Eliyahu Goldin

This may help you:
How to Pass Messages and Actions between Server and Client
http://usableasp.net/DeveloperPage.a...rAndClient.htm

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net
"Steve Hershoff" <ba******@nowhere.comwrote in message
news:%2******************@TK2MSFTNGP06.phx.gbl...

Hi everyone,

We have a javascript function we'd like to call from within a C# method in
our code-behind file. The way it has worked historically is we'd call the
method from a hyperlink, like this:

<a href='javascript:MyMethod(Param1, Param2)' runat="server"
ID="MyLink">click here</a>

...what I'd like to do now is somehow call "MyMethod" from the code-behind
file. I've tried something like this but it doesn't do anything, as best
I can tell.

void JavaScriptTest()
{

Response.Write("<script language='javascript'>");
Response.Write("MyMethod(Param1, Param2);");
Response.Write("<"+"/script>");
}

If I replace the MyMethod line above with something like a vanilla
window.alert(), it does work, so I figure I must be close to an answer?

Oct 11 '07 #2

IfThenElse

You can try

<body onload="JavaScrip: MyMethod(Param1, Param2);">

You need to guarantee that all you controls are available if you function
using any of your controls's IDs. It all depends on what you are doing.

Not sure if onload executes after Body loads or not.

"Steve Hershoff" <ba******@nowhere.comwrote in message
news:%2******************@TK2MSFTNGP06.phx.gbl...

Hi everyone,

We have a javascript function we'd like to call from within a C# method in
our code-behind file. The way it has worked historically is we'd call the
method from a hyperlink, like this:

<a href='javascript:MyMethod(Param1, Param2)' runat="server"
ID="MyLink">click here</a>

...what I'd like to do now is somehow call "MyMethod" from the code-behind
file. I've tried something like this but it doesn't do anything, as best
I can tell.

void JavaScriptTest()
{

Response.Write("<script language='javascript'>");
Response.Write("MyMethod(Param1, Param2);");
Response.Write("<"+"/script>");
}

If I replace the MyMethod line above with something like a vanilla
window.alert(), it does work, so I figure I must be close to an answer?

Oct 11 '07 #3

=?Utf-8?B?UGV0ZXIgQnJvbWJlcmcgW0MjIE1WUF0=?=

Steve,
you could certainly do it this way (there are others, to be sure). But I
think the real problem you have is that you are passing literal string values
of "Param1, Param2" instead of the actual values which would need to be
concatenated:

Response.Write("MyMethod(" +Param1 + "," + Param2 + ");");
See the picture?
Peter

--
Recursion: see Recursion
site: http://www.eggheadcafe.com
unBlog: http://petesbloggerama.blogspot.com
BlogMetaFinder: http://www.blogmetafinder.com

"Steve Hershoff" wrote:

Hi everyone,

We have a javascript function we'd like to call from within a C# method in
our code-behind file. The way it has worked historically is we'd call the
method from a hyperlink, like this:

<a href='javascript:MyMethod(Param1, Param2)' runat="server"
ID="MyLink">click here</a>

....what I'd like to do now is somehow call "MyMethod" from the code-behind
file. I've tried something like this but it doesn't do anything, as best I
can tell.

void JavaScriptTest()
{

Response.Write("<script language='javascript'>");
Response.Write("MyMethod(Param1, Param2);");
Response.Write("<"+"/script>");
}

If I replace the MyMethod line above with something like a vanilla
window.alert(), it does work, so I figure I must be close to an answer?

Oct 11 '07 #4

Steve Hershoff

Thanks Peter (and others). I'd be interested in your input on some other
ways of doing this?

As for the parameters being passed in literally, we actually generate the
method call and appropriate params as a big string, using another method, so
that should be ok, but your point is well taken. Thanks!
"Peter Bromberg [C# MVP]" <pb*******@yahoo.yohohhoandabottleofrum.comwrote
in message news:AA**********************************@microsof t.com...

Steve,
you could certainly do it this way (there are others, to be sure). But I
think the real problem you have is that you are passing literal string
values
of "Param1, Param2" instead of the actual values which would need to be
concatenated:

Response.Write("MyMethod(" +Param1 + "," + Param2 + ");");
See the picture?
Peter

--
Recursion: see Recursion
site: http://www.eggheadcafe.com
unBlog: http://petesbloggerama.blogspot.com
BlogMetaFinder: http://www.blogmetafinder.com

"Steve Hershoff" wrote:

>Hi everyone,

We have a javascript function we'd like to call from within a C# method
in
our code-behind file. The way it has worked historically is we'd call
the
method from a hyperlink, like this:

<a href='javascript:MyMethod(Param1, Param2)' runat="server"
ID="MyLink">click here</a>

....what I'd like to do now is somehow call "MyMethod" from the
code-behind
file. I've tried something like this but it doesn't do anything, as best
I
can tell.

void JavaScriptTest()
{

Response.Write("<script language='javascript'>");
Response.Write("MyMethod(Param1, Param2);");
Response.Write("<"+"/script>");
}

If I replace the MyMethod line above with something like a vanilla
window.alert(), it does work, so I figure I must be close to an answer?

Oct 11 '07 #5

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