How to call a custom control when query string is changed?
My example not work?Why?
<% if(Convert.ToInt32(Request.QueryString["id"])==6){ %>
<answer:answer_n id="give_me_top_five_news" runat="server" />
<%} %>
<% if(Request.QueryString["do"]=="registracija"){
Page.Header.Title = "HHHHH";
%>
<reg:f_reg id="custom_controls_for_registration" runat="server" />
<%} %>
Changed in what fashion? Anytime you load the page with a new URL and query string, the page will be loaded for the first time. You would have to save the info you wanted to store in the Session (for example) and then in the Page_Load event check the query string vs the Session variable to see if they are the same or different.
There may be different ways to do it, but that's what comes to mind off the cuff.
Related
I have t following ASPX source :
<form name="AddComment" action="ViewArticle.aspx?ArticleID=<%=ArticleID %>" method="post" runat="server">
The problem is that when I click submit I got this url
http://localhost:61175/WebSite1/ViewArticle.aspx?ArticleID=%3C%=ArticleID%20%%3E
But I want get this URL :
http://localhost:61175/WebSite1/ViewArticle.aspx?ArticleID=1
If I delete the "runat="server"" command it works fine, but can this form work with the
variable and the runat server at the same time?
Maybe you can try setting the action just before the form markup like this (or in codebehind, at your choice)
<%
this.Form.Action = "ViewArticle.aspx?ArticleID=" + ArticleID.ToString();
%>
<form name="AddComment" method="post" runat="server">
In server side controls you can't do such things as <%= ActionID %> you can only bind <%# ActionID %>.
The upper solution won't work, becouse the form is not that form. You have to give a control ID + name than setup the post url. If it's not an option you can dinamicly search for form item in the control tree, so dynamic ID-s can be handled.
I have the following problem:
I have the variable $GiftID on my page.
I want to cycle through all of my gift objects using my function getGifts().
When the $ID of the gift is equal to the $GiftID of the page then I want something to happen.
Here is an example of my code:
$GiftID
<% control getGifts %>
<% if CurrentPage.GiftID = ID %>This is it!<% end_if %>
<% end_control %>
Using $CurrentPage.GiftID works when printing inside the control, but how on earth do I access it from within the if statement?
I am using SS 2.9
I have not used ss2.9 yet, but as far as I know you can not do <% if Top.GiftID = ID %> in any 2.x version, you can not compare 2 variables, you can only compare with static vaules. (but it is possible in 3.0)
So you have to do it on php side, if you want to only display the slected gift object, then:
if GiftID is actually the DB field for the has_one relation of Gift then you can just do <% control Gift %> and it will scope the Gift object with the GiftID
If you really have GiftID saved as DB field or otherwise, then can do
public function getGift() { return DataObject::get_by_id('Gift', $this->GiftID); }
both ways you can do <% control Gift %> and it will scope it
If you want to list all gifts and mark the current gift then you need to do it on php side (foreach the set of objects and set a flag on the current object)
You should be able to access the current page with Top:
<% control getGifts %>
<% if Top.GiftID = ID %>This is it!<% end_if %>
<% end_control %>
I have a ListView with many advanced controls and html tags. ListView is bound to collection of profiles when first profile in collection is current profile. current profile has few differences from other profiles ie. flash embed, js and some other stuff. I can access inside of my ListView Container.DataIndex property which gives me 0 as first item in index but i'm unable to use inline If statements like so
<% If Container.DataIndex = 0 Then %>
do stuff
<% EndIf %>
this is because i must place pound to access databound item but neither this
<%# If Container.DataIndex = 0 Then %>
do stuff
<% EndIf %>
How can i make inline If ?
Try this:
<% if (DataBinder.Eval(Container, "DataItemIndex")) { %>
do stuff
<% } else { %>
do other stuff
<%} %>
Here is a small summary of the inline aspx tags:
http://naspinski.net/post/inline-aspnet-tags-sorting-them-all-out-%283c25242c-3c253d2c-3c252c-3c252c-etc%29.aspx
But i would recommend to use ListView.ItemDataBound. It is less error-prone and more readable in codebehind.
Did you mean IIF? IIF - Returns one of two objects, depending on the evaluation of an expression.
I am building a .NET MVC app that has a page with a list of delete buttons, one for each item in a list. The problem I'm having is that the foreach variable "item" is not visible inside the LoginView, which results in the following error:
Compiler Error Message: CS0103: The name 'item' does not exist in the current context
Below is a simplified version of the view. The error occurs at the "new {id=item.Id}" in the LoggedInTemplate - the reference to "item" in the ActionLink works fine:
<% foreach (var item in Model) { %>
<%= Html.ActionLink("Item", "Details", new { id = item.Id })%>
<asp:LoginView runat="server">
<LoggedInTemplate>
<% using( Html.BeginForm( "Delete", "Items", new {id=item.Id}, FormMethod.Post))
{ %>
<input type="submit" value="Delete" runat="server" />
<% } %>
</LoggedInTemplate>
</asp:LoginView>
<% } %>
To clarify the problem is not that the Model has not been successfully passed to the View. The Model is visible from both inside and outside the LoginView. The foreach loop as no problem in iterating through the items in the Model (which is a List). The problem is that the iteration variable "item" is not accessible from within the LoginView - though the original Model is.
Is there any way to pass "item" through to the LoginView's templates? Or is building LoginViews within a foreach loops the wrong way of doing things?
Is there a scoping rule that prevents using local variables within controls - perhaps because the control is rendered at a different time to the main page?
With ASP.NET MVC you really shouldn't use user/custom controls, so if you omit the <asp:LoginView/> and write a line of code to check if the user is authenticated, you are good to go.
Instead of your current code:
<asp:LoginView runat="server">
<LoggedInTemplate>
<div>Show this to authenticated users only</div>
</LoggedInTemplate>
</asp:LoginView>
Just use an if-statement and the value of Request.IsAuthenticated:
<% if (Request.IsAuthenticated) { %>
<div>Show this to authenticated users only</div>
<% } %>
Are you passing the Model to the view and are you also inheriting from the model within that view?
So if this is a View then in your C# code you need to return the list of items like return View(listofitems);
If this is a partial view then <% Html.RenderPartial("MyPartial", listofitems) %>
And in the view you need to
<%# Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<IQueryable<ListOfItems>>" %>
If all that is in place then it should work no probs.
<% foreach (var item in Model) { %>
<%= Html.ActionLink("Item", "Details", new { id = item.Id })%>
<%= if( Request.IsAuthenticated ) {
using( Html.BeginForm( "Delete", "Items", new {id=item.Id}, FormMethod.Post))
{ %>
<input type="submit" value="Delete" runat="server" />
}
} %>
<% } %>
There is no need to use the LoginView, its not really giving you anything. Use something like the above instead.
Alternatively, you can move the decision of whether to show the delete option for the specific item into the controller, so instead of doing if( Request.IsAuthenticated ) you would do if( item.ShowDelete ) ... assuming item's type is a view model. Another option is to use an extension method for the same, item.ShowDelete(). I prefer the earlier, because there might be logic associated to deciding whether to show delete for a given item, so its better to not have it in the controller or a related logic.
i have a class which is in App_Code/Kerbooo.cs i want to call that class's method from aspx file (not from code behind) is it possible? if it is, how can i do? thank you very much already now.
If the method is static, then the following should work within the aspx page:
<% Kerbooo.Method1(...) %>
If the method is not static, then you'll need an instance of Kerbooo:
<%
var kerbooo = new Kerbooo();
kerbooo.Method1(...)
%>
First, import the namespace that your code in App_Code uses:
<%# Import Namespace="MyNamespace" %>
If your code isn't in a namespace yet, it's a good idea to put it in one.
Next, you can call your code either with <% code; %> or <%= code %>, depending on whether you want to write the results to the output stream or not.
Data binding, as in <%# %>, requires a little extra work, as do expressions in <%$ %>
You can use <% %> and put your code in between (if you want to write stuff out <%= %> is a short cut for response.write but you need to do this outside of the <% %>
<%
var bob = new Kerbooo();
..do stuff with class
%>
you can mix and match (this does lead to spaghetti code so be carefull)
e.g looping
<table>
<%
var bob = new Kerbooo();
foreach(var thing in bob.GetThings())
{
%>
<tr><td><%=thing.StuffToWrite%><td></tr>
<%}%>
</table>
And your method should be public if your aspx does not inherit from a class in codebehind