C# Discussion Boards - CodeProject

Re: how to access a sub item of a ListView control??

15-Jan-07 21:22

hello
i'm stuck on the problem of accessing the sub items of a listview control. the values of sub columns are not being accessed.
i'm using the following code

private void ColumnList_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)<br />
		{<br />
			ListViewItem selection = ColumnList.GetItemAt(e.X, e.Y);<br />
			if (selection != null)<br />
			{<br />
				MessageBox.Show("Item Selected: "+selection.Text);<br />
			}<br />
<br />
		}

how ever the following code only accesses the values of the left most column only.

how do i access the values in sub items.

plz do reply.

Saira

Christian Graus15-Jan-07 21:41

Re: how to access a sub item of a ListView control??

15-Jan-07 21:41

The item has a sub items property, you can iterate over that.

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Saira Tanwir15-Jan-07 21:48

Re: how to access a sub item of a ListView control??

15-Jan-07 21:48

through the sub item property, items can only be 'added, cleared or removed' and those too only statically.
i want to access the values of the sub items at runtime when the mouse is pressed down on a value.

how can i do this?

Christian Graus15-Jan-07 21:59

Re: how to access a sub item of a ListView control??

15-Jan-07 21:59

http://msdn2.microsoft.com/en-us/library/system.windows.forms.listviewitem.subitems.aspx[^]

I don't see the issue. The ListViewItem class has a SubItems property. lvItem.SubItems[1].Text will give the text of the second item, for example.

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Saira Tanwir15-Jan-07 22:22

Re: how to access a sub item of a ListView control??

15-Jan-07 22:22

well
u can do it ur way but i don't want to give a specific index to lookup its value statically.

i want to give the index od the subitems at runtime, choosing the value of the index by clicking with the mouse on the respected cell of the listView subitem.

can u guide me about it?? Unsure | :~

Christian Graus15-Jan-07 22:29

Re: how to access a sub item of a ListView control??

15-Jan-07 22:29

OK, then you need to work out the subitem from the point that was clicked, that's another problem. I'm sure it can be done, doesn't the control expose it's column list, with widths ?

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Saira Tanwir15-Jan-07 22:42

Re: how to access a sub item of a ListView control??

15-Jan-07 22:42

yes the control does expose its column list with widths but i don't need those column widths.
i need to work out a way to give the mouse focus on the rows of the subitem and their different cells.

Christian Graus15-Jan-07 22:48

Re: how to access a sub item of a ListView control??

15-Jan-07 22:48

Saira Tanwir wrote:
but i don't need those column widths.

Of *course* you do...

			ListViewItem selection = ColumnList.GetItemAt(e.X, e.Y);<br />
<br />
This is your code.  It finds the item, right ? And you need to find the subitem, right ? So, you walk along the column widths and find out which one contains e.Y, that's the one you need.<br />
<br />

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Mircea Puiu15-Jan-07 22:51

Mircea Puiu

15-Jan-07 22:51

.... you mean e.X ...

SkyWalker

Re: how to access a sub item of a ListView control??

Christian Graus15-Jan-07 22:56

Re: how to access a sub item of a ListView control??

15-Jan-07 22:56

Yeah, I do. I am both flabbergasted, and trying to do my own work, so I have not one, but two excuses Smile | :)

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Saira Tanwir15-Jan-07 22:58

Re: how to access a sub item of a ListView control??

15-Jan-07 22:58

the code i posted does retrieve the selected item for only those columns which are created through the code

ColumnList.Columns.Add();
however for items inside the sub items cannot be accessed through this code. Mad | :mad:

Christian Graus15-Jan-07 23:08

Re: how to access a sub item of a ListView control??

15-Jan-07 23:08

So, the ListViewItem you get back doesn't have a SubItems collection ?

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Saira Tanwir15-Jan-07 23:10

Re: how to access a sub item of a ListView control??

15-Jan-07 23:10

it does have a SubItems collection.

Christian Graus15-Jan-07 23:16

Re: how to access a sub item of a ListView control??

15-Jan-07 23:16

Then I've told you all you need to know

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Saira Tanwir15-Jan-07 23:17

Re: how to access a sub item of a ListView control??

15-Jan-07 23:17

Thanks for all the help dude;P
i've figured out just another way to solve the problem.

Until Next time
Regards Rose | [Rose]

Saira Tanwir15-Jan-07 22:44

Re: how to access a sub item of a ListView control??

15-Jan-07 22:44

can u also guide me about a way to set focus of the mouse on the column and all its cells, whose header is clicked.

Christian Graus15-Jan-07 22:49

Sample Code for SetWinEventHook in C#

15-Jan-07 22:49

Once you know what the column is, through the method I told you, if there's an API to select a column, you can call it.

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Pattabhirama15-Jan-07 21:01

Pattabhirama

15-Jan-07 21:01

Hi,

I wanted to know if i could get a sample code in C# for SetWinEventHook.. This I want to use to track the events(Mouse and KeyBoard) in a .NET Application..

After that, Is there a way, that i can use this API(SetWinEventHook) like SetWindowsHookEx to inject code into the target Application's Address space and get the Control information on which the Mouse is Clicked?

Regards
Pattu

Christian Graus15-Jan-07 21:45

15-Jan-07 21:45

www.pinvoke.net[^] is the place to go if you want to call Win32 APIs in C#.

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Pattabhirama15-Jan-07 22:06

Pattabhirama

15-Jan-07 22:06

Hi Graus,
I actually looked at www.pinvoke.net.. But I wanted a Sample code to use this API...

It would be great if i can get it..
Smile | :)

Regards
Pattabhi

Christian Graus15-Jan-07 22:08

15-Jan-07 22:08

Google for it. The point of pinvoke is that you're calling a Win32 API, so the Win32 docs is the place to look for help on how to call it

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert