Adding Dynamic Control To Master Page From Masterpage?
Jan 26, 2010
I seem to be having problems with something that I thought would be simple
and I get the error "object not set to an instance of an object" - I have moved it from prerender to load and tryed all sorts of things, but I get the same error.I am just trying to add a literal control to the masterpage from the masterpage code behind
I am creating Dynamic Checkboxlist controls and adding them to a Panel. It works well when I do not have a Master Page configure to this webpage. Once I have a masterpage congifured.. I get a "Object Reference not set to instance of object" error on the Panel_Control.Controls.Add(Checkboxlistnew) line:
I am adding text fields to a page from the database. I set the .ID to match the record ID from the database. Of course becasue the text field is on the masterpage, when I grab the .ClientID, it is ctl00 contentMain$ctl00. what I don't get is where is my ID? If I set it to say AB how do I find the textbox by AB? I thought it should have AB in the ID somewhere. ID is nothing which I don't get either. I'm looping through the controls in a placeholder like this
For Each row In dtData.Rows() Dim c As Control For Each c In phTextRequired.Controls If c.UniqueID = row("CustomFieldID").ToString() Then
Again though what is in the row() is say AB but the id is way off from that.
I have a masterpage in that i have few static control , tree and menu , i am generating the tree and menu dynamically , that works fine , after that when i chlick any node, the content page lode perfectly ...but the dynamic control in the master page ( tree and menu )disapper , but all the static control are there , what might be issue , i am generating the tree in master page load event ,
this is my code in page load event , i am using VS2005 , IE 8, windows XP
I'm starting with ASP.NET MVC (1.0). I have a problem to resolve. I have developed a web applicaton (an application of articles like e-commerce) with a head (logo and menu). I have defined the head (logo and menu) in the Master page (site.master). Now, I must display the number of articles in the head in a field (like the number of articles in the virtual basket in the e-commerce). I can read the number of articles in the data base (in the controller), but i can't integrate it in the master page.
I am feeling that I have terribly wrong somewhere. I was working on a small asp.net app. I have some dynamic themes in the heme folder and have implemented a page base class to load the master page on the fly. The master is having the ContentPlaceHolder like: <asp:ContentPlaceHolder ID="cphBody" runat="server" />
Now I am adding pages that are derived from my base class and added the form elements. I know, Visual Studio has problem showing the page in the design mode. I have a dropdown box and wish to add the event of onselectedindexchange. But it is not working. the page is like this:
I'm new in ASP.net, i download your code from the below link.URL...I was searching from net to add a new row in client side i go thru this it was OSOME. I have another dought if you add a one link delete option to delete the row in client side.Another thing if we add a template field such as textbox and dropdown list then there no datafield then how we fill the grid from database.
I come from a windows dev environment so the web makes me feel like a big dummy.
I am using VS2008, VB.NET, 3.5 Framework, ASP.NET, AjaxControlToolkit.
I have included a screen shot that might help to look at while you read my attempt to explain my issue below!
I just recently discovered in a book here on my desk how to interact with a master page programmatically from a nested master page or a regular aspx child page. The method they describe makes sense and is familar to me because they use Public Properties on the master page to manipulate the GUI and controls on the master page. But since they are public, the child pages can see them and fire them off. Makes sense.
I thought I could use this method to do the opposite of that and have the master page fire off something (say a public property in a nested page) to have it then do some work and update things on that nested page.
I have a MASTERPAGE.MASTER. Under that, I have a LEFTNAV.MASTER (so its a nested master page). Then, under that I have my default.aspx page.
(I did that so that for some of my regular aspx pages I could just tie them directly to the master page so that they dont have a left navigation page...like for big charts or graphs, etc. Is that the best way for that by the way?)
So on the masterpage, I have just a simple asp.net search textbox and an asp.net search button. When they type something in and click search, I want it to add a tab to the AJAXControlToolkit - TabPanel that I have on the default.aspx page, then some other things such as update a datagridview there with the search results.
I can do all of this except the event firing and scope. I cannot see a way to make a button on the master page up top fire off an event that is on the default.aspx page to make it do what it needs to do.
What I tried doing was creating a public property on my default.aspx page. I have some actual code in the SET to do some GUI manipulation and change some stuff on the page. But on my master page within the search button's click event, I cannot see where to call this public property on the default.aspx page...
I have read in so many articles that all controls get their values from viewstate before load event. Then how my dynamically added controls get their values when i am adding them in OnLoad event ie after LoadPostData event.
I have a simple SiteMapPath in my master page like below. <asp:SiteMapPath ID="SiteMapPath1" runat="server" SkinID="SiteMap" Visible="true" /><br /> Also I use Web.sitemap and include all static sitemap pages. In my Web.config, I have this: <siteMap enabled="true"/> Currently, many pages uses this static site map for many projects and I'm not supposed to update the master page, but I need to have dynamic site map so that I can add query strings for each navigating pages.
i have read and used this script.Adding Dynamic Rows in ASP.Net GridView Control with TextBoxes..it is very usful to me but i want to fetch data from sqll database and fill the newest row with it. the past row data hav to be remain same. becoz of the same name of textbox it happens. whenever i try to fetch data from database and fill textbox all rows get updated with the same data.
First i had taken Default.aspx Page .after that i added master page to my project.Now i want to include this master page into default.aspx page I was mention master page attribute in Page directive of defult.aspx.
Now problem is i am not able to Get the attribute of <asp:contentplaceholder>.
I am trying to add a .aspx page in the project , but while adding the .aspx page i am not getting the option to choose existing master pages. I remember long back i used to get that option to select the master page.
I am having menus on the left side of the master page.I am also having the html pages related to the menu link. Based on the menu selection i would like to show the corresponding html pages as a content to the right side of the master page.
The html pages shoud need to be shown just like the other webforms are shown on the right side of the master page pased on the menu selection.
i'm trying to add a CSS class to a control in a nested master page.what i usually do with a master page is adding this to the nested page:
after i give id=left_a and runat=server to a control in the master page.but when i tried to do it from a page nested in a nested masterpage, it gives me an error.what i want to do i add a class to a control in the nested master page from the nesting page.
I'm trying to create an ASP.NET MVC master page so the site navigation on it will look like this:
Main Menu:Home | About | News Sub Menu: Home_Page1 | Home_Page2
The Sub Menu section should always show sub-menu for the currently selected Main Menu page (on the example above 'Home' page is selected) unless a user hovers the mouse on another Main Menu item (then it shows that item's sub-menu instead).
i'm having this issue, in ASP.NET MVC 2 where I'm adding a drop down list on the master page and filling it with data from an abstract master controller. When an option is selected an submit button clicked, it reroutes you to a new page. so lets say
the page lives on http://domain.com/landingPage i'm on: http://domain.com/landingPage i select option and submit takes me to
http://domain.com/landingPage/Projects/FramedPage i select again and now the post tries to go to:
http://domain.com/landingPage/Projects/landingPage/Projects/FramedPage because of the action="" i have set on the form tag.