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Zone: > NEWSGROUP > Asp.Net Forum > windows_hosting.hosting_open_forum Tags:
Item Type: NewsGroup Date Entered: 5/17/2004 3:39:04 AM Date Modified: Subscribers: 0 Subscribe Alert
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majeluk
Asp.Net User
Disappering child controls and content.5/17/2004 3:39:04 AM

0/0

My very simple custom control iherits from System.Web.UI.Control. This control acts like a container for other controls and text. It is like a bit more sophisiticated Panel control, basically only the RenderBeginTag and RenderEndTag are overwritten. Now I want to consume the control, so I throw in some text or controls inbetween the control's begin and end tags (in html editor). All fine. Now I change a property of this control, and when I come back to the html editor, all the previous content of the control is gone. Why??? The only metadata about my control is:

ParseChildren(false) and PersistChildren (true)

I know Panel does it somehow.

Also, do you know if it is possible to achieve the functionality that when working id designer mode one could just drag and drop some other controls (labels, grids, etc) into my control and even edit them (and not have to do it manually in html)? Just like Panel lets you do it.

Any comments and/or references are appreciated.

Thanx.
hlaford
Asp.Net User
Re: Disappering child controls and content.5/18/2004 12:07:29 AM

0/0

i'd prefer to see some sample code (of the control, not its consumption) to resolve the first part. as for editing control contents in design mode: you'll need to use a ReadWriteControlDesigner. I have yet to see it done well enough to use. I'm hoping that there are some examples for it in 2.0 since it's an essential part of making the designer useful.

http://www.developersdex.com/asp/message.asp?r=2719059&p=2906
AndrewSeven
Asp.Net User
Re: Disappering child controls and content.5/21/2004 4:44:58 PM

0/0

Is there a reason that you don't want to inherit from Panel?
majeluk
Asp.Net User
Re: Disappering child controls and content.5/21/2004 4:59:26 PM

0/0

Thanx for the suggestion. However the code from online resource did not even compile; there was a problem with line:

mshtml.IHTMLElement e;

Am I missing some reference???

I did solve my main problem partially. To preserve all the functionality of Panel control, I made my new control iherit from Panel. This preserved all the basic style properties as well as the drag and drop functionality. The only customization I made was overriding the RenderBeginTag and RenderEndTag of the Panel base class. This achieved almost everything I was aming at. There two more features I am still trying to implement.

1. In generall. I want to add a property to my control, let's say an int. I have it all coded and it works fine but this new property looks different from the standard properties in the properties pane in vs.net. It is bold and it is always populatad with some value. I am trying to make it bahave like for example the Width propertie - initially it is blank (not specified), but when value is entered it becomes bold.

2. The design view of my control in vs.net is still the same as with the regular Panel, but now my control renders differently in aspx. How can I change my control's look in design to reflect the result of rendering on a page, and at the same time keep the drag and drop functionality. From what I have read so far this is not really supported since the Designer has to inherit from either ComponentDesigner (allows to create custom design view but no drag and drop) or ReadWriteControlDesigner (drag and drop but no custom design view). Please share your experiences.

Thanx again for your help.



majeluk
Asp.Net User
Re: Disappering child controls and content.5/21/2004 5:20:25 PM

0/0

Sorry, I posted my message not knowing about your post.
5 Items, 1 Pages 1 |< << Go >> >|


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