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dotnet jscript
group:Global variable
dotnet jscript:
value each time I need to call any function of .JS file in my ASP.NET application? Example: var aux=null; function myFunction1() { ... } function myFunction2() { ... } Now when I call myFunction1(), aux = true, and when I call myFunction2(), aux = false. The problem is that I need to preserve the previous value to test it in both functions. How? Help me please. Both functions are called in click event of 2 button's. -- Programming ASP.NET with VB.NET Thank's (if you try to help me) Hope this help you (if I try to help you) ruca
Hi Patrice,
[quoted text, click to view] > Dont' you have a local variable that uses the same name ? No.[quoted text, click to view] > Do you have a postaback between these two calls ? (that would reinitialize I think that what happens is that when I click on button the page load> of course the variable value though it shouldn't be false). again, right? But If I have a link (with href=...) instead of a button (click event) the thing works fine. But in Load event I have: if not Page.IsPostBack() then ... end if -- Programming ASP.NET with VB.NET Thank's (if you try to help me) Hope this help you (if I try to help you) ruca "Patrice" <nobody@nowhere.com> escreveu na mensagem news:uIiK7YQLEHA.1484@tk2msftngp13.phx.gbl... [quoted text, click to view] > It should work. Try : > > var v; > function a(){v=true} > function b(){alert(b)} > a(); > b(); // Should display true > > Dont' you have a local variable that uses the same name ? > Do you have a postaback between these two calls ? (that would reinitialize > of course the variable value though it shouldn't be false). > > Patrice > > > "ruca" <ruuca@iol.pt> a écrit dans le message de > news:%23e05hDQLEHA.1192@TK2MSFTNGP11.phx.gbl... > > How can I declare a global variable in my .js file, that I can preserve > her > > value each time I need to call any function of .JS file in my ASP.NET > > application? > > > > Example: > > var aux=null; > > > > function myFunction1() > > { > > ... > > } > > > > function myFunction2() > > { > > ... > > } > > > > Now when I call myFunction1(), aux = true, and when I call myFunction2(), > > aux = false. The problem is that I need to preserve the previous value to > > test it in both functions. How? > > Help me please. > > > > Both functions are called in click event of 2 button's. > > > > -- > > Programming ASP.NET with VB.NET > > Thank's (if you try to help me) > > Hope this help you (if I try to help you) > > ruca > > > > > >
It should work. Try :
var v; function a(){v=true} function b(){alert(b)} a(); b(); // Should display true Dont' you have a local variable that uses the same name ? Do you have a postaback between these two calls ? (that would reinitialize of course the variable value though it shouldn't be false). Patrice "ruca" <ruuca@iol.pt> a écrit dans le message de news:%23e05hDQLEHA.1192@TK2MSFTNGP11.phx.gbl... [quoted text, click to view] > How can I declare a global variable in my .js file, that I can preserve her > value each time I need to call any function of .JS file in my ASP.NET > application? > > Example: > var aux=null; > > function myFunction1() > { > ... > } > > function myFunction2() > { > ... > } > > Now when I call myFunction1(), aux = true, and when I call myFunction2(), > aux = false. The problem is that I need to preserve the previous value to > test it in both functions. How? > Help me please. > > Both functions are called in click event of 2 button's. > > -- > Programming ASP.NET with VB.NET > Thank's (if you try to help me) > Hope this help you (if I try to help you) > ruca > >
But why this works with links, and not with buttons? This is what I can't
understand. -- Programming ASP.NET with VB.NET Thank's (if you try to help me) Hope this help you (if I try to help you) ruca "Patrice" <nobody@nowhere.com> escreveu na mensagem news:OX0cJIRLEHA.1144@TK2MSFTNGP12.phx.gbl... [quoted text, click to view] > ASP.NET simulates the usual statefull event driven programming model but > it's worth to note that the server side "model" and what you have client > side is not the same "thing". The server side "model" is used to create the > client side code (mostly HTML+JavaScript snippets) that will reproduce what > you modelled server side. Client-side you'll have also some info (the > viewstate) that allows to recreate automatically the server side model from > scratch during the next server round trip. > > In your case, you initialize a variable client side code, then you have a > postback. The server side "model" is recreated to regenerate client side > code (possibly updated depending on what you do on postback). When the new > code is returned to the navigator the client side variable is initialized > again. > > This variable should be persisted beetween calls (for example using an > hidden field). You should find more details on the general architecture in > the documentation. > > Patrice > > > "ruca" <ruuca@iol.pt> a écrit dans le message de > news:%239L%23ZrQLEHA.2396@TK2MSFTNGP12.phx.gbl... > > Hi Patrice, > > > > > Dont' you have a local variable that uses the same name ? > > No. > > > > > Do you have a postaback between these two calls ? (that would > reinitialize > > > of course the variable value though it shouldn't be false). > > I think that what happens is that when I click on button the page load > > again, right? > > But If I have a link (with href=...) instead of a button (click event) the > > thing works fine. > > > > But in Load event I have: > > > > if not Page.IsPostBack() then > > ... > > end if > > > > > > -- > > Programming ASP.NET with VB.NET > > Thank's (if you try to help me) > > Hope this help you (if I try to help you) > > ruca > > > > > > "Patrice" <nobody@nowhere.com> escreveu na mensagem > > news:uIiK7YQLEHA.1484@tk2msftngp13.phx.gbl... > > > It should work. Try : > > > > > > var v; > > > function a(){v=true} > > > function b(){alert(b)} > > > a(); > > > b(); // Should display true > > > > > > Dont' you have a local variable that uses the same name ? > > > Do you have a postaback between these two calls ? (that would > reinitialize > > > of course the variable value though it shouldn't be false). > > > > > > Patrice > > > > > > > > > "ruca" <ruuca@iol.pt> a écrit dans le message de > > > news:%23e05hDQLEHA.1192@TK2MSFTNGP11.phx.gbl... > > > > How can I declare a global variable in my .js file, that I can > preserve > > > her > > > > value each time I need to call any function of .JS file in my ASP.NET > > > > application? > > > > > > > > Example: > > > > var aux=null; > > > > > > > > function myFunction1() > > > > { > > > > ... > > > > } > > > > > > > > function myFunction2() > > > > { > > > > ... > > > > } > > > > > > > > Now when I call myFunction1(), aux = true, and when I call > > myFunction2(), > > > > aux = false. The problem is that I need to preserve the previous value > > to > > > > test it in both functions. How? > > > > Help me please. > > > > > > > > Both functions are called in click event of 2 button's. > > > > > > > > -- > > > > Programming ASP.NET with VB.NET > > > > Thank's (if you try to help me) > > > > Hope this help you (if I try to help you) > > > > ruca > > > > > > > > > > > > > > > > > > > >
ASP.NET simulates the usual statefull event driven programming model but
it's worth to note that the server side "model" and what you have client side is not the same "thing". The server side "model" is used to create the client side code (mostly HTML+JavaScript snippets) that will reproduce what you modelled server side. Client-side you'll have also some info (the viewstate) that allows to recreate automatically the server side model from scratch during the next server round trip. In your case, you initialize a variable client side code, then you have a postback. The server side "model" is recreated to regenerate client side code (possibly updated depending on what you do on postback). When the new code is returned to the navigator the client side variable is initialized again. This variable should be persisted beetween calls (for example using an hidden field). You should find more details on the general architecture in the documentation. Patrice "ruca" <ruuca@iol.pt> a écrit dans le message de news:%239L%23ZrQLEHA.2396@TK2MSFTNGP12.phx.gbl... [quoted text, click to view] > Hi Patrice, > > > Dont' you have a local variable that uses the same name ? > No. > > > Do you have a postaback between these two calls ? (that would reinitialize > > of course the variable value though it shouldn't be false). > I think that what happens is that when I click on button the page load > again, right? > But If I have a link (with href=...) instead of a button (click event) the > thing works fine. > > But in Load event I have: > > if not Page.IsPostBack() then > ... > end if > > > -- > Programming ASP.NET with VB.NET > Thank's (if you try to help me) > Hope this help you (if I try to help you) > ruca > > > "Patrice" <nobody@nowhere.com> escreveu na mensagem > news:uIiK7YQLEHA.1484@tk2msftngp13.phx.gbl... > > It should work. Try : > > > > var v; > > function a(){v=true} > > function b(){alert(b)} > > a(); > > b(); // Should display true > > > > Dont' you have a local variable that uses the same name ? > > Do you have a postaback between these two calls ? (that would reinitialize > > of course the variable value though it shouldn't be false). > > > > Patrice > > > > > > "ruca" <ruuca@iol.pt> a écrit dans le message de > > news:%23e05hDQLEHA.1192@TK2MSFTNGP11.phx.gbl... > > > How can I declare a global variable in my .js file, that I can preserve > > her > > > value each time I need to call any function of .JS file in my ASP.NET > > > application? > > > > > > Example: > > > var aux=null; > > > > > > function myFunction1() > > > { > > > ... > > > } > > > > > > function myFunction2() > > > { > > > ... > > > } > > > > > > Now when I call myFunction1(), aux = true, and when I call > myFunction2(), > > > aux = false. The problem is that I need to preserve the previous value > to > > > test it in both functions. How? > > > Help me please. > > > > > > Both functions are called in click event of 2 button's. > > > > > > -- > > > Programming ASP.NET with VB.NET > > > Thank's (if you try to help me) > > > Hope this help you (if I try to help you) > > > ruca > > > > > > > > > > > >
There's a way around this, thought its not direct, depending on the context
of your "Global" definition. You can access Cookie values through JavaScript. If you manage a variable by always referring to a value inside of the client's cookie, then that should work. (Global within a User's context, as opposed to a session context) You could, instead of using a js variable (var x;) always refer to a value that is inside of a hidden field (make sure that the hidden field is set to runat="server"). This would be "global" within a given page context. You could subclass your page class. Create a Class, deriving from page, that has a hidden field. When the page posts back, you perform some sort of synch operation with that hidden field and an application/Session variable and expose that value as a property of the page. That way all of the pages that derive from this subclass would automatically have access to that variable (effectively creates a "Global" Session/Applicatoin) level value that script can access). Side Note...if you subclass your Page class, you'll want to place the subclass inside of a seperate assembly and set a reference to it in the Visual Studio IDE, otherwise the designer gets a little funky. If there's any way around doing this, I'd recommend it. Take a step back and see if there's something you can do to your architecture to make this unnecessary. However, these approaches should work if you have to take the approach you're looking at. [quoted text, click to view] "ruca" <ruuca@iol.pt> wrote in message news:%23e05hDQLEHA.1192@TK2MSFTNGP11.phx.gbl... > How can I declare a global variable in my .js file, that I can preserve her > value each time I need to call any function of .JS file in my ASP.NET > application? > > Example: > var aux=null; > > function myFunction1() > { > ... > } > > function myFunction2() > { > ... > } > > Now when I call myFunction1(), aux = true, and when I call myFunction2(), > aux = false. The problem is that I need to preserve the previous value to > test it in both functions. How? > Help me please. > > Both functions are called in click event of 2 button's. > > -- > Programming ASP.NET with VB.NET > Thank's (if you try to help me) > Hope this help you (if I try to help you) > ruca > >
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