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";
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 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.
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.
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?
I'm using this Ajax script [URL] to load content from an aspx page on another server than the page calling the content. So far I've learned that this is a no go. The problem seems to be that when using an absolute link to content the script fails as apposed to using a relative link.
I've searched the web for about 10 hours now, and I still haven't found what I'm looking for.
I bought a website a few years ago, hosted with WebHost4Life,. Since their migration their has been nothing but problems with my site, however, I am stuck because I don't have the knowledge to move it, have tried with no success. Anyway, recently I have been getting parser error messages, Webhost fixed them, and then it starts over again. It takes them weeks to get around to it and since its my livelihood, I can't afford for the site to be down for 5 days then running for one day. I've tried to contact the guy that built the site to no avail, he won't answer my emails.
why these parser errors keep happening. This is a recent thing from the past 2 months, never had this before. What can I do to stop it. it looks like the knowledge here is unreal, I'm in awe everytime I read your answers. BTW, heres my lastest parser error:
Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Only Content controls are allowed directly in a content page that contains Content controls. Source Error:
i have a masterpage and has some linkbuttons in it, i also have a webform which is a content page for the masterpage. i like to access the controls to the webform via the linkbutton residing in the masterpage or access the linkbuttons via the webform controls.
I have a master page with a textbox that I want to use for a search, and display the results on the content page.
I've dragged in the datasource to the content page, and configured the formview to use that datasource... almost.
The issue I'm having is that on the last step of the configure datasource wizard where you select the parameters, I want to select the master page textbox control for the search parameter... but of course it's not available in the list. The list only allows me to choose controls from the content page.
How do I set this master page search box as the parameter for my datasource?
I am having asp:hyperlinks in my master page, which i use as my page headers. I would just like to change the text format of the hyperlink when a content page is loaded.
the CS code for accessing the master page contents from content page?
The following code works fine for disabling content page controls, but how do I disable master page controls?
public void DisableControls(Control control,bool isEnable) { if (control.HasControls()) { foreach (Control c in control.Controls) { DisableControls(c, isEnable); } } else { if (control is IPostBackDataHandler && !(control is IPostBackEventHandler)) { if (control is WebControl) { ((WebControl)control).Enabled = isEnable; } else if (control is HtmlControl) { ((HtmlControl)control).Disabled = !isEnable; } } } }
I've got a number of MasterPages with ContentPlaceHolders. I do not know how much Placeholders are on the MasterPage. Now i want to load Content to the PlaceHolder, id the ContentPlaceHolder exists. When i use the this.Master.FindControl the MasterPage renders and the added Content would not be rendered. See: [URL] Soo I tried two posibilities of adding the content:
[Code]....
Second way:
[Code]....
The first way seems to be the faster way. But which is the "better" way? Would any of this make any problems?
I am learning ASP .NET and I want to understand the workflow when working with dynamic data. For a basic page structure: header, menu, content panel, I would like to use the content panel to display data ( a profile like page ) I have in a database base on the user selection in a menu control. What I want to find out is how do I implement that content panel part so that it gets built dynamically. What is the best practice for this creating custom controls for every dynamic section of the page? Do I need to create my own ContentPanel user control? Or is there a way to take that <div> andinject content in it at runtime?
I have a ShoppingCart UserControl on MasterPage. I have a following functionality: User adds item to the cart. after clicking the button "Complete Sale" in UserControl the page is redirected to "CustomerInfo.aspx" and after filling the Customer information and clicking on submit which is on CustomerInfo.aspx page i want to call the "Complete Sale" click event of UserControl from "Customerinfo.aspx" page.
