i have a page with html link control. i am trying to change the "href" attribute from codebehind but it gives
"object reference not set to instance of object" error.
HtmlLink link1 = (HtmlLink) Page.FindControl("stylesheet");
link1.Attributes.Add("Href", "css/styles.css");
I've just started playing around with ASP.NET. I'm using the MVC model of ASP.NET. I'm working on creating the main master right now. I created most of my stuff with good old HTML, except for the ContentPlaceHolders. I created the hyperlinks with regular anchor tags. I created my various controllers and views for each of my main pages. In the anchor tags, I placed the URLs that would be used for in HTML. For example, I have a page called "Register", so I have a controller "RegisterController", then it's Index View. My question is: The code editor tells me it can't find the file in the href attribute. Is there a better way to do hyperlinks in ASP.NET, or do I just need to deal with those warnings?
View 4 Repliesnormally on would use the following :-
aspx page:-
<a ID="a1" href="javascript:void(0);">Link1 </a>
code behind:-
a1.HRef="www.mySite.com/mypage.aspx";
how do u set this HRef attribute in case the anchor tag is within a repeater ?
We have a Master page (asp.net) with a menu item (html anchor) which should not be populated with a href for a certain user role - but it's always showing!
The Master.cs has:
<li><a id="manage" runat="server" href="~/Views/Manage.aspx" title="Manage details">Manage </a></li>
In the OnLoad event on the Master.cs we remove the HRef attribute if it's a certain user type - that seems to work OK, I've checked in the Watch window.
manage.Attributes.Remove(Constants.HREF_ATTRIBUTE);
The Watch windows confirms the HRef attribute being blanked out but as soon as the Master.cs is displayed the HRef is back again, as if the HRef in the aspx has overwritten the 'removal' in the code.
Im trying to create a site that is multi language, in order to do this all copy, alt tag text and url links are stored in a db.
I then get all the info for that language and put it into a cached dataset. i then loop through the dataset on each page look for a tag in the html code and enter the copy, image alt tag or url.
I have a project that suddenly the webusercontrols starting to ignore the codeBehind files.
When ever I click a button it setups a inline button click event in the ascx file
[code]....
Why does my VS2008 suddenly start to use inline click event instead of using the codebehind ascx.cs file that I want?
The only thing that works in the code below for me is that it does display, so I know that I am dealing with the cotrect control. But I can't get the position to change.
[Code]....
is it possible to change attribute values on a non-asp.net controls (like an image)? I can change attributes on buttons and the like, but not on images? btnID.Style.Add("display", "inline") This works for a btn, but if I try to use this code to reference image (or even just try to make the image disappear) - it does not work Further info: I am using this code on a drop down list - basically when the user makes a selection i want to remove an image (make it invisible or visible) or change its display attribute (e.g. to inline). It does work ok for a real btn - but i can't reference an image ID.
View 3 RepliesI have the following selectparamter for a listview
[Code]....
I am new in ASP.NET and I am having a problem in generating the ID of each label that I generate in ListView's ItemTemplate control. I use it like this :
<asp:SqlDataSource ID="JobCat" runat="server"
ConnectionString="<%$ ConnectionStrings:KROVAN %>"
SelectCommand="SELECT * FROM [TblJobCat]"></asp:SqlDataSource>
<asp:ListView ID="ListView1" runat="server" DataSourceID="JobCat">
<ItemTemplate>
<li>
<a href="Jobs.aspx?CatID=<%# Eval("JobCatID") %>"><%# Eval("JobCategories") %></a>
<asp:Label ID="label<%# Eval("JobCatID") %>" runat="server"></asp:Label>
</li>
</ItemTemplate>
</asp:ListView>
When I run it, it says Parse Error. So is there any solution than can be done to change the label ID like this?
I am facing challenge of changing action attribute of html form tag. As my application is on shared hosting (medium trust) environment of godaddy server, I cannot use reflection to get control adapter of html tag page. So, I cannot use the following code in my Url Rewriting module.
[Code]....
Is there any otherway to implement the same functionality without reflection?
panel defaults to absolute positioning - change the left attribute
[Code]....
i have this on my master.page
<ul class="menu">
<li class="first" runat="server" id="Li2">
<a runat="server" id="A1" href="../NewEntry.aspx">Create a New Entry</a>
</li>
</ul>
when i go to content page ("NewEntry.aspx") i want the link name to be changed to "Update Entry"
<ul class="menu">
<li class="first" runat="server" id="Li2">
<a runat="server" id="A1" href="../UpdateEntry.aspx">Update Entry</a>
</li>
</ul>
I have a website that uses IFrame in a page that loads other pages based on server side logic. So, if I do a View source, I would see something like this:
<iframe src="DeterminedOnServerSide.aspx" id="myFrame">
</iframe>
My question is - Is there any way, an attacker can change the src attribute to point other users to a malicious website considering that the src is determined on the server side?
I have an XDocument that looks similar to
<root>
<a>
<b foo="1" bar="2" />
<b foo="3" bar="4" />
<b foo="5" bar="6" />
<b foo="7" bar="8" />
<b foo="9" bar="10" />
</a>
</root>
I wish to change the attribute foo to something else, and the attribute bar to something else. How can I easily do this? My current version (below) stack overflows with large documents, and has an awful smell to it.
string dd=LoadedXDocument.ToString();
foreach (var s in AttributeReplacements)
dd = dd.Replace(s.Old+"=", s.New+"=");
I'm trying to create a table with Listview and one of the fields I'm using is supposed to show a hyperlink to a more detailed view of the data shown, how I want to do that is by using FindControl on the ID of that item and then changing the value into a hyperlink of the detailed view page with a querystring attached, the problem is that I have no idea how to re-insert that data back into the listview field, which looks something like this:
<ItemTemplate>
<td>
<asp:Label ID="ViewLinkLabel" runat="server"
Text='[insert Link Here]' />
</td>
</ItemTemplate>
I'm still an amateur in ASP.net, and if any of this seems too convoluted when there's a much easier to do this that I don't know about.
I have an app I am transitioning to MVC3 to see what the upgrade path is essentially. I've hit a snag. I believe I've run into a change that may be due to the changes for Dependency Injection in action filter attributes, but I have been unable to track down the cause, and the "correct" solution.This project uses StructureMap and NHibernate. The NHibernate session is started at the beginning of each request, and ends at the end of each request, thanks to a small module. This is just to give an idea of the stack involved...o I have a few custom Authorize attributes (Inheriting from AuthorizeAttribute) that perform some more complicated authorization logic for specific actions that they decorate. Part of their functionality involves using two repositories which they must either (a) have injected, or (b) get from the StructureMap ObjectFactory themselves. In MVC2 I was using option b, so that the CONSTRUCTOR of the attribute looked like this:
[Code]....
This worked fine, as in MVC2 the constructor was called each time the attribute was evaluated. This BREAKS in MVC3, where it would appear that this is no longer the case. Due to this apparent change, the FIRST time this attribute is evaluated, it runs fine, but each subsequent time, any calls in the repositories fails because it claims the NHibernate Session object hasn't been started! The reason being, as far as I can tell, that the CustomAuthorizeAttribute is created once, and then held in whatever state it exists in at that point for the lifetime of the application... Which means that the dependencies inside of it (Which SHOULD go out of scope at the end of each request, and be reinstantiated / fetched at the beginning of subsequent requests), are instead persisting with it becoming stale after the first evaluation.After banging my head against the desk for a few hours, I realized that simply moving these calls to the ObjectFactory into the AutorizeCore method made everything work again.Now, all of this was of course, a hack, because there wasn't a good easy to do real dependency injection into attributes in MVC2. I hear that is changed in MVC3, and I am wondering if this behavior is in response this change, and if so, what do I need to do to make this work?
I have the following defaultmembership provider in my web.config
<add name="UmbracoMembershipProvider" type="umbraco.providers.members.UmbracoMembershipProvider" enablePasswordRetrieval="false" enablePasswordReset="false" requiresQuestionAndAnswer="false" defaultMemberTypeAlias="Another Type" passwordFormat="Hashed" />
I am trying to update the enablePasswordReset from false to true programmatically but am struggling.. This is as far as I got!
ConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);
var section = (MembershipSection)config.GetSection("system.web/membership");
var defaultProvider = section.DefaultProvider;
var providerSettings = section.Providers[defaultProvider];
// Now what?
<asp:GridView ID="GridView1" runat="server">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="TextBox1" onchange="calculate()" runat="server" Text="0"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
I'm getting this error on the above markup: Message 1 Validation (ASP.Net): Attribute 'onchange' is not a valid attribute of element 'TextBox'.
I have a web user control menu of page. Now I want HOME (which is an hyperlink text) in menu to be Bold at the time default.aspx Loaded (Load event)! How can I do that If any one can provide code! I am using VB .Net at back.
View 2 RepliesI have a problem with my web site 1stSigBdeAssn.org. I have made no changes to the site but I now get the following error message:
Parser Error Message:
Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive.
Source Error:
[code]....
I created a simple Master Page in Visual Studio 2008:
<%@
Master
Language="VB"
CodeFile="MasterPage.master.vb"
Inherits="MasterPage" %>
<!DOCTYPE
html
PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
and got green underlined 'Master' with two warning messages: 1.Validation (ASP.NET): This attribute name must be followed byan equal (=) sign and a value. If the value is in quotation marks, the quotation marks must match. 2. Validation (ASP.NET): Attribute 'Master' is not a valid attribute of element 'Control'.How I can get rid of the messages?
I have a tag:
<asp:ListItem
CssClass="LabelCSS">Executive</asp:ListItem>
and I am getting the error message
Validation(ASP .Net):Attribute CssClass is not a valid attribute of element ListItem.
What attribute would I use for Css with ListItem?
I am using a link in href for example: URL....I want that to be dislayed dynamically from database my PID should be fetched from database.
View 1 RepliesI have a a grid view that one of its columns is a link field. this is my code to generate the link field. It worked with
a href, but not with HyperLink.
here is my code
<ItemTemplate>
<a href="CustomerDetails.aspx?CustomerId=<%#Eval("Customer_Id")%>" target ="_blank"><%#Eval("Customer_Id")%> </a>
</ItemTemplate> [code].....