Problem getting array values into Java Script from code behind file

[Tenacious]

I find that I can call a function in my code behind file from Java
Script on the aspx page using this syntax:
Lat = <%= GetNextLatitude()%>

The function has to be static. No problem so far. When I put the
function in a for loop like so:
for(var i = 0; i < TotalPoints; i++)
{
Lat = <%= GetNextLatitude()%>
Lng = <%= GetNextLongitude()%>
LatLngPoints[cnt] = new GLatLng(Lat, Lng);
}

the return value from the function stays the same for each iteration
of the loop. Using the debugger I can tell that even if TotalPoints is
1000, the function in reality only gets called once. I can call it
more than once if it is not from a loop. Why does this happen? Is
there any other way that I can get an array from the code behind page
to the Java Script in the client?

Thanks

 

[bruce barker]

your server function are called during render of the html not when the
browser runs the javascript, so they are only called once (do a view
source). see ClientScriptManager.RegisterArrayDeclaration().


-- bruce (sqlwork.com)

 

[Kevin Spencer]

StringBuilder latLongs = new StringBuilder(");
for (int i = 0; i < TotalPoints; i++)
{
latLongs.Append("new GtLatLng(GetNextLatitude().ToString() + "," +
GetNextLongitude().ToString() + ")");
if (i < TotalPoints - 1) latLongs.AppendLine(",");
}
Page.ClientScript.RegisterArrayDeclaration("LatLongPoints",
latLongs.ToString());

--
HTH,

Kevin Spencer
Microsoft MVP

Printing Components, Email Components,
FTP Client Classes, Enhanced Data Controls, much more.
DSI PrintManager, Miradyne Component Libraries:
http://www.miradyne.net

 

[Tenacious]

StringBuilder latLongs = new StringBuilder(");
for (int i = 0; i < TotalPoints; i++)
{
latLongs.Append("new GtLatLng(GetNextLatitude().ToString() + "," +
GetNextLongitude().ToString() + ")");
if (i < TotalPoints - 1) latLongs.AppendLine(",");}

Page.ClientScript.RegisterArrayDeclaration("LatLongPoints",
latLongs.ToString());

--
HTH,

Kevin Spencer
Microsoft MVP

Printing Components, Email Components,
FTP Client Classes, Enhanced Data Controls, much more.
DSI PrintManager, Miradyne Component Libraries:http://www.miradyne.net

I find that I can call a function in my code behind file from Java
Script on the aspx page using this syntax:
Lat = <%= GetNextLatitude()%>

The function has to be static. No problem so far. When I put the
function in a for loop like so:
for(var i = 0; i < TotalPoints; i++)
{
Lat = <%= GetNextLatitude()%>
Lng = <%= GetNextLongitude()%>
LatLngPoints[cnt] = new GLatLng(Lat, Lng);
}

the return value from the function stays the same for each iteration
of the loop. Using the debugger I can tell that even if TotalPoints is
1000, the function in reality only gets called once. I can call it
more than once if it is not from a loop. Why does this happen? Is
there any other way that I can get an array from the code behind page
to the Java Script in the client?

Thanks- Hide quoted text -

- Show quoted text -

Thanks for the help. It pointed me in the right direction and got me
over this hurdle.