<script ID="clientEventHandlersVBS" LANGUAGE="vbscript">
s=pass()
y=s
</script>
<%
session("password")=y
Response.write(session("password"))
Response.write(y)
%>
i have this code. but nothing is getting stored inside the session variable neither anything is getting printed. cant i access the variables declared outside the asp code or is their any syntax mistake. any help is really appreciated
First of all put
<% Option Explicit %>
at the top of every .asp page.
You will immediatly see that you are trying to access non declared variabels s and y.
So of course nothing is stored in the session variables.
Can you not use
<%
s = pass
y = s
%>
and so on ?
What is the purpose of the <script ... line if you are using vbscript any how ?
As implied by the ID of the script (clientEventHandlersVBS) the code contained in there refers to the client (the browser, IE in this case since it is the only one that supports VB client-side)
the <% %> tags though refer to server side ASP code..
These two can never communicate as they happen at different times/computers...
Related
We have a number of categories with products in an ASP eCommerce site and, based on the category, would like a particular file to be included. For example, if URL is:
viewPrd.asp?idproduct=6&idcategory=18
then based on idCategory=18 I would like to include:
<!--#include file="menu18.asp"-->
If idCategory=19 then I would like to include:
<!--#include file="menu19.asp"-->
and so on. Any assistance would be appreciated.
I use a script taken from https://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=9796&lngWId=4 (dynamic ASP inclusion)
So after including that script in your code, you just have to write:
myMenu = Request.Querystring("idCategory")
Include("menu"&myMenu&".asp")
Unfortunately, include files are a feature of IIS, not ASP. They are included before the page is sent to the ASP-processor that interprets your ASP code.
For this reason you can't have conditional includes.
The includes are already in place when the ASP code is executed.
To have conditional code in ASP you could use script components (WSC files), which you can include/load conditionally, or use big if...then or case.. constructions inside an include.
More info on the use of WSC's can be found here
As far i know its not possible on a "elegant way", but i suggest you to take a look in those links:
is it possible to issue dynamic include in asp-classic?
https://support.microsoft.com/en-us/kb/192144
Regards.
Yes, its possible. Just leave the include statements outside the <% %> code delimiters.
This is my quick and dirty solution and it works:
<% session("lang") = request.querystring("lang") %>
<%if (session("lang") = "es" or session("lang") = "") then %>
<!--#include file="espanol.asp"-->
<% else %>
<!--#include file="ingles.asp"-->
<% end if %>
<!--#include file="precios.asp"-->
IIS will include the two files, but ASP will use only the file that satisfies the if conditions.
<%= Session.Item("user_fullname")%>
this supposed to display session value right?
but mine is displaying code itself....
Note: I have included aspx page in another aspx, like:
<% Response.WriteFile("../etc/header1.aspx") %>
the displaing session code is inside header1.aspx
anyone knows how to display session value?
Session items would be stored as an Object. You need to cast to the correct type:
<%= (string)Session.Item("user_fullname") %>
When using Response.WriteFile("../etc/header1.aspx"), the usual Page Life cycle will NOT be executed for the mentioned header1.aspx page.
Since there will be no asp.net page life cycle processing , the inline code
<% %> won't be executed at all and therefore all such statements will be displayed as it is.
Response.WriteFile() is used to write just the Contents of a file, which can contain HTML , Controls, directly to the output stream.
I am a asp .net beginner. I want to use some objects created at Site.Master.cs in Site.Master. Is there an easy way to do it?
I know how to do it in MVC(by using view(the object)). But how can i do it in normal ASP .net web application?
I don't understand what exactly you want to do.
If you want to insert some string into tag's title you can insert the following thing in SiteMaster.master file:
<img src="<%= Page.ResolveUrl("~/") %>images/logo.png">
instead of:
<img src="images/logo.png">
In the first case there will be calculated the path from the root of your application. In the second case there will be relative link. This is because server will CALCULATE the value of Page.ResolveUrl("~") function and will WRITE it in src tag.
You can do the same thing with any other methods, classes if you defined them properly. But I wouldn't recommend you to implement complicated logic in .aspx files (or .master files). Because you can end up with many difficulties with testing and styling such application.
There are other server tags:
<% %> - an embedded code block is server code that executes during the page's render phase. The code in the block can execute programming statements and call functions in the current page class. Description and examples
<%= %> - most useful for displaying single pieces of information. Description and examples
<%# %> - data binding expression syntax. Description and examples
<%$ %> - ASP.NET Expression. Description and examples
<%# %> - Directive Syntax. Description and examples
<%-- --%> - Server-Side Comments. Description and examples
<%: %> like <%= %> - But HtmlEncodes the output (new with Asp.Net 4). Description and examples
Another way: you can use JSON to send some data to the client and then process it with javascript. Take a look at this project.
If the #Page directive in your .aspx file has Inherits="XYZ" where XYZ is the class declared in your .cs file, you can simply add a protected field to your class and assign a value to it. You'll be able to access it in the .aspx file just by using its name.
You can also use HttpContext.Items property to keep objects during a single request:
HttpContext.Current.Items["SavedItem"] = "hello world";
And use it in page:
<%= ((string)Context.Items["SavedItem"]) %>
Any public or protected property or method in Site.Master.cs will be accessible from Site.Master.
but how to invoke c# code in aspx ?
There are several ways, including the <%= %> construction, and databinding syntax.
It would help if you explained what you're trying to achieve.
I got tossed into some maintenance work on a classic ASP (note: NOT ASP.NET) page. This page has a line that looks like this at the top:
<object RUNAT="server" PROGID="findasp.Search" id="objFind"></object>
The body of the asp page then has something that looks like this:
<form ACTION="search.asp" METHOD="post" ID="frmSearch" NAME="frmSearch">
<% objFind.Display "", "" %>
</form>
What is the world is this doing? It looks like it is calling the Display function. This function than spits out some HTML. From my guess, the Display function is defined through the objFind object. However, I can't find how objFind is defined or where it is defined.
Can someone please give me some advice? I have no clue where to go with this at this point.
The code is using a server side object - this would be a com object with the name (PROGID) findasp.Search assigned to the variable (id in the tag) objFind.
This com object seems to define a Display function, however without knowing more about findasp.Search there isn't much more I can tell.
I have some code in my master page that sets up a a hyperlink with some context sensitive information
<%If Not IsNothing(Profile.ClientID) Then%>
<span class="menu-nav">
<a target="_blank"
href=
"http://b/x.aspx?ClientID=<%=Profile.ClientID.ToString()%>&Initials=<%=Session("Initials")%>"
>
Send
<br />
SMS
<br />
</a>
</span>
<%End If %>
<span class="menu-nav"> <!-- Name __o is not declared Error is flagged here-->
Now the issue seems to be in the href part. If I remove the dynamic code the error disappears. Can anyone tell me how to resolve this issue?
I've found the answer on the .net forums. It contains a good explanation of why ASP.Net is acting the way it is:
We have finally obtained reliable repro and identified the underlying issue. A trivial repro looks like this:
<% if (true) { %>
<%=1%>
<% } %>
<%=2%>
In order to provide intellisense in <%= %> blocks at design time, ASP.NET generates assignment to a temporary __o variable and language (VB or C#) then provide the intellisense for the variable. That is done when page compiler sees the first <%= ... %> block. But here, the block is inside the if, so after the if closes, the variable goes out of scope. We end up generating something like this:
if (true) {
object #__o;
#__o = 1;
}
#__o = 2;
The workaround is to add a dummy expression early in the page. E.g. <%="" %>. This will not render anything, and it will make sure that __o is declared top level in the Render method, before any potential ‘if’ (or other scoping) statement.
An alternative solution is to simply use
<% response.write(var) %>
instead of
<%= var %>
Yes, I have experienced the same bug occasionally in pages that use server side constructs on ASPX pages.
Overtime, I found a fix for it (I'm sorry, I just haven't been able to find out where I found this bit of info again.) and that fix is to put the following code above the errant <%...%> block:
<%-- For other devs: Do not remove below line. --%>
<%="" %>
<%-- For other devs: Do not remove above line. --%>
Apparently, where you put the above code makes all the difference to VS.NET, so it may take a few tries to get it right.
This is an odd solution, but for me I managed to fix this problem by simply closing the offending open files in Visual Studio.
With them open, i was erratically getting the __o problem.
As soon as I closed them, the __o problem disappeared.
After some hours of googling and analyzing bunch of aspx'ses in my current project seems I've found the solution, that is working for me. Would to advise strongly avoid html-style comments:
<!-- ... -->
inside aspx page. Instead of it use aspx-style comments
<%-- ... --%>
Additionally it helped me obtain that vs intellisense and code highlighting became working again and the mainly thing - this case had begun from it - vs can now hit the breakpoints inside embedded pieces of vb/cs code! And no any damn "This is not a valid location for a breakpoint" message.
When I've cleaned the solution, restarted IIS and it is still mysteriously playing up, I find this can sometimes be caused by pasting an ASPX source file's contents from another system into Visual Studio which "helpfully" updates the code, possibly changing some IDs and breaking the page.
Pasting it into another editor (Notepad++?) then saving it stops Visual Studio from "being helpful" and the page works again.