Hi All I created a web user control inherited from a datagrid for sorting and encapsulation. It rendered perfectly in design mode, and I could use the property builder. I applied visual styles, got it all working, and today, for no apparent reason, The controls are rendering as plain empty ...more >>

Greetings, I need some help on writing business objects in C#. These objects are suppose to communicate with a SQL server DB through a DAL. So let's say I want to create a new Customer (simply adding a new record in my Customers table). How would you suggest I go about it? Should I use static...more >>

Im sure this has been discussed here before but I have had no luck finding an answer. I am trying to create a simple web app, with a navigation on one side that will load up pages on the other. The nav side is a custom control, that has an event that fires upon click, and then sets a selected...more >>

I have a custom control - deriving from WebControl - that contains a custom collection property as the default property. The collection implements IList and each item is also a custom control deriving from Panel control. I don't have a custom collection editor. Whenever I add my item through ...more >>

I have a composite control which dynamically adds child controls to the Controls collection in CreateChildControls method, based on various properties that are set by the page developer. In any case, my question is at what point do child controls obtain their IDs? Or do they at all or do I ha...more >>

Hi All I am developing a web application where the users should be able to upload files to the server by just dragging a file from the windows explorer or the desktop onto an area on the web browser. Now when i drag a file on to the browser IE tries to open it. i have tried to use the onDragDrop ev...more >>

Hi, i tried to create my own custom controls and met following problems: -according to the book "Programming ASP.NET" i created two projects within my solution. one is the main and the other holds the custom controls. as output path i set the binary directory of the inetpub path. all work...more >>

I have 2 user controls and I would like to display 1 of them depending on a session variable. I have trie a place holder, but it doesnt seem to work. ie.. Select Case Session("Variable") Case "1" PlaceHolder1.Controls.Add(New MyControl1) Case "2" PlaceHolder1.Controls.Add(New MyCont...more >>

I would like to add <col> tags right after <table> tags but it seems Table can't have a literal control as a child. <Table> <Col width="50"> <Col> <Col width="50"> <tr><td>1</td><td>2</td><td>3</td></tr> </Table> that's kind of what I am looking to do. Do I need to derive the Table con...more >>

I have developed a custom web control that may contain any child controls. Now I have a problem that even though I register an event handler on a child control, the event handler does not fire when it should. Do I need to handle event registrations of child controls specially? Casper ...more >>

In the procedure CreateChildControls I add several controls like check and textboxes, button link and so on. How can I get the postback respons on the button link: The functions: lblButtonLink_Command and lblButtonLink_Click will not be executed Please help Ton ...more >>

I have been playing with Visual Studio and trying to learn it. I am creating a simple web application with a web form named WebForm1.aspx (using defaults). I placed Label and Button from the Web Forms section of the toolbox. I double clicked the button to get the code behind event for the button ...more >>

Hi to all... I have a webform and inside 2 webcontrols like this... Webform.asp |--------------------------------------------------- | Webcontrol1 | ____ | | | ...more >>

Hi, I wrote a customserver control with 2 columns showing the data from 1 record. i use label & hyperlink as for the field name and text and checkboxes for the other data. I want to use the hyperlink. How can I get a postback on that hyperlink. Ton ...more >>

I have been wrestling with this code for about 2 weeks now. My goal is to create a table for formatting purposes. I want to standardize it as a webcontrol. I want all of the content to persist as top-level controls so that they are visible to the asp.net designer -- PersistChildren(true). The...more >>

Hi, I've developed a server control which shows a database record. The fields are showen in 2 columns and the added controls depends on the datatype. I use textboxes, chekcboxes and dropdownlists Now I'm adding a server procedure, but how can I detect that one of the fields has been modified....more >>

VB.NET ASP.NET Does anyone know how to embed a windows forms control on a web page in = the same way that you could do active x objects in asp Thanks...more >>

Hi, Looks like I've misunderstood something about controls lifecycles. I have an OnInit method override in my control: protected override void OnInit(EventArgs e) { base.OnInit (e); //some stuff } The control is then added to an ASPX page and an event handler is assigned in the...more >>

I created a web user control and would like to add the ability for it to contain design-time rendering capabilities. So that, during development, when the control is dragged to an aspx web form, it'll show html content that contains what it would look like when ran. Is this possible? I created a ...more >>

I have a custom web control that inherits from System.Web.UI.WebControls.Panel What I want is for developers to be able to drag controls from the toolbox, into my control, and have them appear as they would on the finished page. My control renders a table around the outside of its child cont...more >>

Hi, I've created a custom server control dbList which contains a datagrid In my CreateChildControls sub I add the control Controls.Add(Grid) In my Fill sub I have this code (Fill can be executed from a button on the page like dbList.Fill) sqlConn.ConnectionString = "workstation id=VRS7;p...more >>

Hi, I am developing couple of custom controls and I can't really figure out what I need to do for one of them to be parsed appropriately. This is what I want to achieve: in the aspx file, I would have the code: <cc:ControlA attr1="val1"> <cc:ControlB attiba="valx" /> ...more >>

Hi, Given an object, I want to programmatically monitor it for any property changes and method calls. The object can be anything (component, control, etc.), and there is no guarantee that each property has <property name>Changed event corresponding to it. What are the best way for this? I'...more >>

I am working on a control and trying to use my custom collection with a CollectionEditor. However, the collectio is never being held after I click the OK button. The last set of properties is there but the member list is blank. Below are some snippets from my control. Please help I am going crazy...more >>

Hi to the forum.. i have a project with this webcontrol Webcontrol _______________________ | |initialize component | button +=new event..... | controls.add(button) | | |event onclick ...more >>

I have a winforms control that draws a rectangle for a boarder and positions some graphical elements around the control to create the boarder effect I desired. In the control I have overriden the onpaint event and added the code to draw my rectangle and position my graphic items: Protected Ove...more >>

I have a control that has a collection in it. In the designer the collection editor comes up fine and I can add items to the collection. But once I click on OK and then go back into the collection editor the Member side is blank and the Properties side shows the last item entered. For some reason...more >>

hi i have a login page. as soon as the user logs in, am moving the User_id and Session Id to a log table. The problem is that if i use the back button of the browser and login again. am getting the same session ID. but i want it to be an unique one..... any help... wud be useful... Rea...more >>

Does anyone know how the Style property of the WebControl class persists between calls as if it's added to the ViewState? CssStyleCollection is not serializable. The following scenario leads me to believe it is being stored in ViewState somehow: 1. Add a TextBox and a Button to a form 2....more >>

How come I am unable to access the properties and methods of my Web User Control from the codebehind of an aspx page Any ideas how how to do this -mike...more >>

Hi to all, this is my question.... Webcontrol1 ________________________ | | |initialize component | | button +=new event..... | | controls.add(button) | | | |event onclick ...more >>

Hi! I'm creating a custom control derived from ScrollableControl (a picture viewer similar to what ACDSee does). My problem is that I couldn't find any scroll events (what i would expect from a ScrollableControl)... Any hints? TIA! Jens...more >>

I have an ASP.NET control that can generate up to 200K in memory on a per request basis. It reads a series of files, manipulates them in memory and then writes them out together as a single response stream. This is unavoidable given what I'm doing with them. I have a couple questions about t...more >>

How do we build a custom control using datagrid from scratch? ANy sites, ideas will be appreciated. Sumana...more >>

I have a datalist that I subclassed and it has a usercontrol in the header template, in the usercontrol is a databound dropdown. It loads fine and posts fine unless I rebind the datalist, then the dropdown loses it's viewstate. Someone please help their has to be a way around this. Gerald Klei...more >>

This functionality is implemented in the SQLConnection control in the connectionstring property. I am Building a custom control from an inherited base class. (datagrid) I have exposed a property for a connectionstring which I want the user of this control to be able to use the way the connecti...more >>

I have a control that I have built a custom designer that shows the content from an ItemTemplate. However the Datagrid never shows up in the designer. It seems at this point that the Datagrid is the only thing that will not show up in the designer for me and this is an issue for me because it wil...more >>

I have a datalist that I subclassed and it has a usercontrol in the header template, in the usercontrol is a databound dropdown. It loads fine and posts fine unless I rebind the datalist, then the dropdown loses it's viewstate. Someone please help their has to be a way around this. Gerald Klei...more >>

Hello, I can not make the databound Navigator (Superexpert Data Form) work on Oracle using the OLEDB part of it I get the following error One or more errors occurred during processing of command. ORA-00923: FROM keyword not found where expected Can anyone please tell me how to make it work...more >>

I have written several custom web controls for my aspx pages. In order to use any of them, I need to include the following line of code at the top of every aspx page: <%@ Register TagPrefix="MyPrefix" Namespace="MyNamespace" Assembly="MyAssembly" %> Is there any way to declare this at th...more >>

i have a scenario in which i am using a ICustomTypeDescriptor in combination with an inherited PropertyDescriptor class to display information about an object using the PropertyGrid provided with .NET. I'm am using C#, and have noticed that the GetValue method which is overridden in my PropertyDescr...more >>

I'm deriving a Designer from ControlDesigner. The control is working pretty nicely now. What I'd like to add is a verb response that will put the control into an interactive design mode (where some of the properties can be modified a bit more elegantly than with the Properties window. I'm ...more >>

I am looking for some help or a tutorial on Template controls. Basically the idea is to be able to build a small table with two rows and in the first row will be some text and an image. Then in the second will be anything the developer wants to put in there. Now all I can ever seem to find is an ...more >>

I've been searching for a while and have found jack on composite controls... Most source say it is as easy as this .. what is wrong with the following code... I'm trying to change a property of the label, works in design... but as soon as I build all is lost... I've tried everything ... what ...more >>

I have some javascript functions shared among several controls I wrote. I want to encapsulate all these functions inside a .js file, creating a library like the one used by the asp.net intrinsic validator controls. My doubt is how to add a reference to this .js file when one of my controls is pl...more >>

I have created a custom control that derives from the PlaceHolder control. Based on a property setting, I load a DropDownList or a TextBox into the PlaceHolder control. I load the DropDownList or TextBox control in protected override void OnPreRender(EventArgs e). The issue that I have is get...more >>

Hi. I wrote a component derived from the textbox control that has an Autotab feature the component works well on both Netscape and IE. My only problem is that sometimes, on IE, I receive the error: "Can't move focus to the control because it is invisible, not enabled, or of a type that does n...more >>

I'm having a variation on the typical problem with saving ViewState of dynamically created web controls. I have two radiobuttonlist controls (call them rbl1 and rbl2). Both are created at design time. Each has three items in their Items collection. When the selected item in rbl1 changes, the...more >>

Hi All, I am facing a typical problem in my .NET application with the pop-up script messages. The thing is that its working fine when i run on my development machine but not running in expected manner when i move it to Prod environment. Please have a look at the following code snippet... //...more >>

I've created a library of page templates and some user controls. These files reside on d: drive instead of c:\inetpub\wwwroot\webapp directory. When I use LoadControl("webUC1.ascx"), it looks for this file in c:\inetpub\wwwroot\webapp. How do I force it to look for the user control in any director...more >>