Changing Dynamic Controls Via DropDownList On Content Page?
Nov 4, 2010
Problem: Content Page with Wizard Control with UpdatePanel and Placeholder. Above the UpdatePanel is a DropDownList. I need to display different input controls below the drop-down list when the user changes the selection in the drop-down list. When the user clicks 'Next' on the wizard control, I need to be able to get the data out of those dynamic controls as well.
I know all the dynamic controls have to be created in the OnInit method in order to get the data back from those controls during the postback. However, when the drop-down list's SelectedIndexChanged event is fired, the OnInit method is called... then the PageLoad... and finally the handler for the SelectedIndexChanged event is called. ViewState hasn't been restored until well after the OnInit & PageLoad methods have been called, so there is no way to know what the user chose in the list box at the time OnInit is called... which exactly when I'm required to create the dynamic controls.
I need to add the dynamic dropdown on content page from content page itself,i have tried the below code its throwing error object instance property cannot be null.
protected void Page_PreInit(object sender, EventArgs e) { //Create a Dynamic Panel Panel pnlDropDownList; pnlDropDownList = new Panel(); pnlDropDownList.ID = "pnlDropDownList";
Following is the structure of the pages in application
[Code]....
Suppose the user is on ..../paycheck.aspx which is the content page. But when ...../paycheck.aspx loads, "lnkDynamic" properties "Text and PostBackUrl" must be set. Which events should be handled .....
My Master Page has a heading with tabs. The code looks something like:
<CT:Tab ID="tabHome" runat="server" Url="/index.aspx" Text = "Home" Highlight="true" /> <CT:Tab ID="tabFun" runat="server" Url="/fun.html" Text = "Fun"/> <CT:Tab ID="tabBlog" runat="server" Url="/blog" Text = "Blog"/>
I can think of two ways to control which tab is highlighted from within a user control:Have the user control implement an interface. The master page can decide which tab to highlight based on which interface is implemented, or based on a method in the interface that returns a string.In the Page_Load (or Page_Init) function, tell the master page (via FindControl or via a function in the Master Page) which control to highlight.I don't really like either of these solutions. Is there a clean way I could control which tab is highlighted from the control at design time (i.e., in the aspx file)?
I have web servie and web application ..Request hit from widows application to web service .if any request got means i need to redirect to some others pages in web application ,how can we do ..web application always open in server ..
I have two dropdownlists on my page that are related to one another, and are built dynamically. I did not write the original code, but I believe it is using AJAX so the whole page doesn't postback when the ddl selection changes. The first ddl is Status and the second is ContractType. Here is the code for the event handler:
I commented out the event handler since this snapshot, just to see what would happen, but when I was hitting it you can see what ex.Message was. I don't understand why it says the SelectedValue is invalid when I see the selected value is "E " and that is one of the four items in the ddl.
I have a problem which i can not figure it out on my own, because i do not know where to look. Here's a brief description of my problem;
I have a treeview on my aspx page, when user clicks on one node, i read an html code ( such as <html> <body> sample page</html> ) from database and i just want to show this html content on the same page, say that on the right side of the treeview.
I have used freetextbox control for letting the user to input some html enabled articles.
A treeview on the right side -> (Users selects one node) -> HTML content created on the right side.
I have made a gridview by assigning a sqldatareader object to it to display records....but i want to change the headertext of each column.i dont want the default name stored in the database how do i change the headertext?
I am developing a multi language website. language change is working very well on master page. from master page I am storing session to use in contant pages.
when I am trying to change text (<p>.....<P>) in content page, thats not working.
In master page I am using asp content place holder. And in my child page I am using pure html coding. When I attach master page in my child page I am getting this error.Content controls have to be top-level controls in a content page or a nested master page that references a master page.
I have in my MasterPage a DropDownList that appears in all my Pages. I want it to run a specific code when user select another item in the list, but the event SelectedIndexChanged in the MasterPage doesn't work. How can I do to get this event working?
Can I ask what this error refers to, (I have had it twice now over the last couple of days and then it goes away):
System.Web.HttpException: Content controls are allowed only in content page that references a master page.
This is followed by Stack Trace:
[HttpException (0x80004005): Content controls are allowed only in content page that references a master page.] System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection) +9744256 System.Web.UI.Page.get_Master() +55 System.Web.UI.Page.ApplyMasterPage() +14 System.Web.UI.Page.PerformPreInit() +51 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1104
I am not using any Content Place Holder or Master Page (does the error refer to the Site.Master file because while I can see it in. Solution Explorer, I never use it. All of my aspx files look like this along the top with no reference to Site.Master:
I am getting this error "Only Content controls are allowed directly in a content page that contains Content controls". I am using a single aspx page and not a separate cs file. Now, to write code inside aspx page, I am using <script> tag. Now, my problem is inside one of the method I have to use <script> tag. Now, when i use that this error comes. Eg
Lets say I have a Web Application with a menu of products. When a user clicks a menu item, then create and display a dynamic set of controls in an Update Panel. I am currently doing this however the PostBack and recreation of controls is tedious and resource intensive.
Not sure about this but is it possible to build a webpage with controls on it, then display it in update panel or IFrame? Then on post back you wouldn't have to recreate everything all over again?
I have an application that needs to render a page that will have multiple Radio Button Groups as well as multiple CheckBoxes. The desired layout is determined by a database table.
This table defines a "Package". The "Package" can contain many different "Items" that require different controls used in the View. The "RadioGroupName" field is used to mark which RadioButtons should be grouped together. The "ViewControl" field marks which control should be used on the View to display the field. The query in my repository will return a result set such as
Given this result set, I need to render the view as follows:
A RadioButton group with 3 options (Item1, Item2, Item3) A CheckBox (Item4) A CheckBox (Item5) A RadioButton group with 3 options (Item6, Item7, Item8)
I have read that it is possible to use "if" conditions and looping structures inside the View. I have also read that this is a bad practice. Another issue I see is knowing which Item has been selected from each RadioButton group when I hit the Controller POST function. Previously I have built a page that has a single RadioButton group. My ViewModel was as follows:
I have a GridView. It has a 'static' TemplateField (in the .aspx page). I add and remove BoundFields to it depending on user preferences on postback. Affter the second postback, the template field appears empty.
Here is a stripped down mockup of what I'm doing. You can click the "Regular Postback" button as much as you want, and nothing bad happens. But if you click the "Recreate" button once-- it's all ok. Click it again, and the "one" column goes on Christmas break.
So is there something else I should be doing, or is this going to be a "halcyon1234 to code interface" error.
My project has the following repeater menu shown on the Master Page. I need this menu to remain hidden until the user logs in. How do I access from content page?
What is the Best practice of dynamic changing password for this scenario?
The scenario is:
There are three web apps using ASP.NET.
App1 checks the passwords of app2/app3 to authenticate the identity, and if app2/app3 is authenticated then app1 is allowed to receive information from App2 and App3.
And app1 has to change the passwords of app2/app3 every two hour for security reason.
Is it possible that there is a way to implement this scenario without app1 saving the passwords of app2/app3 for security reason?
Or is there any best practice for dynamic changing password scenario?
we want to have a fronend to a custom databasince, since I do have experiance with HTML/CSS and have used VB.NET before, I'm the one that gets to make it.
problem is, the one thing I have not used before is the autentication system in ASP.NET, I want to use single-signon for the system.
and I do have this right now, the only problem I have is how do I check if a user is logged in, and change the page content for autenticated users.
the template does have this:
[Code]....
which does indeed change the login view, problem is, how do I change this to change the pages and menu.this:
[Code]....
has to be a longer menu that also gives options to insert data into the database and/or remove/update the data.
