asp.net server control

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.NET2.0

Hi,

Can you pls help me ans the following question?
Also pls explain why it is so.

When an asp.net server control is added to a web form, visual studio.net adds one item to the class for the form. What item is added?
a. The eventt registration
b. A protected class member for the control
c. a default event handler for the click event
d. a default class that inherits from control's base class

Posted 13-Aug-10 0:11am

RedHearts

Updated 13-Aug-10 0:13am

v2

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R. Giskard Reventlov 13-Aug-10 6:30am

Is this homework? We don't do homework.

RedHearts 13-Aug-10 6:47am

Nope. It's not homework. We had a quiz. and we answered option (b)
They said it was wrong and said answer was option (c). Just wanted to cross verify.

2 solutions

Solution 1

Well, instead of getting an answer to it, why not go ahead and try it out. It would hardly take 10min.

It's a very direct thing and would not have a descriptive answer that can be argued upon.

BTW, you can always ask 'them' what does 'default event hanlder' mean here. If it would be something like, drag a button and do nothing more, now run the application and click the button, would the page get postback?

Posted 13-Aug-10 5:52am

Sandeep Mewara

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RedHearts 16-Aug-10 1:29am

Yes the page gets postback.. I guess the question is not clear, I need to get it cleared.. Thanks :)

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AspDotNetDev · Accepted Answer · 2010-08-13T06:53:00

When I create a textbox and give it an ID, "myTextbox", the following gets added to the designer.vb file (assuming you are using VB.Net):

VB

'''<summary>
'''myTextbox control.
'''</summary>
'''<remarks>
'''Auto-generated field.
'''To modify move field declaration from designer file to code-behind file.
'''</remarks>
Protected WithEvents myTextbox As Global.System.Web.UI.WebControls.TextBox

But that only happens after I give the textbox an ID. I'd say the correct answer is "none of the above". If, however, they must have an answer I'd say the correct one would have to be "b". No event handlers are added unless you double click the textbox, and even then the event handler is for the "text changed" event. So, the event depends on the control created and would not be the click event in all cases. Bring this to your teacher... maybe they will listen.