How to get PropertyGrid tag and GridItem tag in PropertyValueChanged event

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I write a window application form. There is one buuton on the form, when click it, the popram will create a new PropertyGrid, and set some features for it as below :

C#

PropertyGrid NewPropertyGrid = new PropertyGrid();
NewPropertyGrid.tag = CheckString;
NewPropertyGrid.PropertyValueChanged += new PropertyValueChangedEventHander(NewPropertyGrid_PropertyValueChanged);
NewPropertyGrid.SelectedObject = NewObject;

When user changes the value in the PropertyGrid's GridItem, the event below will be invoked.

void NewPropertyGrid_PropertyValueChanged(object s, PropertyValueChangedEventArgs e)

The question now is below :

How can I get the object of the PropertyGrid, so that I can get its tag (eg PropertyGrid.tag) and do further check in this event ?

Posted 5-Jan-11 23:08pm

Sports Kuo

Updated 5-Jan-11 23:12pm

Venkatesh Mookkan

v2

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Venkatesh Mookkan · Accepted Answer · 2011-01-05T23:13:00

Solution 1

C#

void NewPropertyGrid_PropertyValueChanged(object s, PropertyValueChangedEventArgs e)

Here "s" will give you the PropertyGrid as object. You need to cast it and use it

Update 1:
~~You can also check e.OriginalSource.~~

Update 2:
You are supposed to cast like,

((PropertytyGrid)s).Tag

or

(s as PropertyGrid).Tag

Mark it as answer if it helps you

Posted 5-Jan-11 23:13pm

Venkatesh Mookkan

Updated 6-Jan-11 15:25pm

v5

Comments

Sports Kuo 6-Jan-11 5:47am

=======================================
Thanks, but when I use the folling line, it can't work :

(Property)s.tag

since there is no tag attribute for you to select, so I can't get (Property)s.tag.

Could write down the whole line for reference ? Thanks.
========================================

Sports Kuo 6-Jan-11 5:51am

=======================================
Sorry, I correct my line below :
(PropertyGrid)s.tag.

Please show the workable line for reference.

Venkatesh Mookkan 6-Jan-11 5:56am

Updated the answer.

Sports Kuo 6-Jan-11 10:16am

========================>
I use VS2010, and I still can not find the e.originalsource, could you find it, and work well ?
============================>

Venkatesh Mookkan 6-Jan-11 11:01am

void NewPropertyGrid_PropertyValueChanged(object s, PropertyValueChangedEventArgs e)

- "e" is the object of PropertyValueChangedEventArgs in the about statement.

Sports Kuo 6-Jan-11 20:46pm

Thanks of your information.
Howevere, the condition is very strange.
I suppose this issue is very simple as normal, but when I try to get the actived PropertyGrid.tag in the event, all the following lines are failed :
1. (PropertyGrid)s.tag
(but there is no 'tag' for choice)
2. s.tag (no meaning)
3. e.ChangedItem.parent.tag
(the parent is 'Category' of GridItem,
it's not the actived PropertyGrid)
4. e.ChangedItem.parent.parent.tag
(the parent.parent is the class object
of this GridItem/propery, it's not the
actived PropertyGrid.)
5. e.OriginalSource
(but there is no OriginalSource for
choice)

Can you really find it and work well on your VS system ? If yes, can you try and write down the full lines for it ?
Why I can't ? I suppose it is a very very normal case, but ...

Venkatesh Mookkan 6-Jan-11 21:24pm

Answer has been updated. The way, you are doing your casting is wrong. See my answer above.

Sports Kuo 6-Jan-11 21:32pm

=============================>
I got it ! Thanks so much !

Venkatesh Mookkan 6-Jan-11 21:34pm

Great. Happy programming