I've just started a blog and the first main post is a sample that I wrote to customize the DataGridView to support collapsing and expanding. I call it a TreeGridView: http://blogs.msdn.com/markrideout/archive/2006/01/08/510700.aspx

Let me know what you think!

-mark

DataGridView Program Manager

Microsoft

This post is provided "as-is"

Sure thing! Let me know what cool UIs you make with it (if you can)!

-mark

DataGridView Program Manager

Microsoft

This post is provided "as-is"

Hi

Thanks for your coding.

But I got error when I opened the project.

My frmaework version is 2.0.50727

best regards

Can you post the error you got?

-mark

DataGridView Program Manager

Microsoft

This post is provided "as-is"

hi mark,

downloaded your code . got an error when i tried to run

visual styles-related operation resulted in an error because no visual style is curently active

Yes sorry, this control is written to require Visual Styles to be enabled on your computer. You'll need to modify it if you want to run the TreeGridView without visual styles

-mark

DataGridView Program Manager

Microsoft

This post is provided "as-is"

How I can change grouped column. In your example, it is "subject", I want to do it "From". I couldn't find a way to do it.

Could you please help?

This example doesn't implement any grouping, it is a tree grid. That said, you can goto the Columns property in the property grid and in the columns collection editor change the Subject column type to be a DataGridViewTextBoxColumn and change From column to be a TreeGridColumn.

Next, you'll need to fix a bug in the TreeGridCode. Open the TreeGridNode.cs file and find the cells_CollectionChanged method.

Change this line of code

if (cell.GetType().IsAssignableFrom(typeof(TreeGridCell)))

to

if (typeof(TreeGridCell).IsAssignableFrom(cell.GetType()))

Note again, this won't get what you want -- you'll have to write a lot of code to change the data and node structure to do what you want. Open the Form1.cs file and you'll see that I've hard-coded the data to be based upon the subject.

Hope this helps
-mark
DataGridView Program Manager
Microsoft
This post is provided "as-is"

Thanks Mark,

I know it is not exactly same thing, but it helps! Thank you again.

is there a way to change column type programmatically instead of property grid?

Thanks !

This is simply fantastic!!!.

Thanks for providing such a control.I have 1 question though , I would like to use it with edit mode and I have noticed that in your blog you say that you implemented the "F2" which works fine.However before reading your log I set the property "AllowUserTOaddRows =true " and it crashes.Any suggestions on this one?

Basically I would like to use it in a way that the user fills the tree and

whenever you start writing on a node another empty one is added.

Any suggestions?

Thanks a lot in advance

I have found out that by setting AllowUserToAddRows to true it crashes and it looks like it crashes in the treeGridCell on line 186

"If (node._grid.SHowLInes) because is null.

Any ideas?thanks

No ideas. I didn't design this to support allowing users to add rows (that is why it sets the value to false in the constructor).

-mark

DataGridView Program Manager

Microsoft

This post is provided "as-is"

fair enough.I really like your control,any advice on adding the ability to add rows?

thanks anyway for making this available

just what i was looking for.Awesome!!

I am new to the datagrid itself .I am struggling to make it work with a dataCombobox in it .Does anybody have an example how i can implement a combo in the treegridview?

THANKS

Hi Mark

I can't show gird in DataGridView by set ShowLines property.

Please help me

Thanks

Steven

ShowLines shows the tree lines. It doesn't change the cell's border options. You should set the CellBorderStyle property to something like Single.

-mark

DataGridView Program Manager

Microsoft

This post is provided "as-is"

Mark,

Would be very grateful if you could show me how i can include a combobox with the treegrid.

this is the structure

City                                               

Hotel  Name  Star   Location

Star and Location should be comboBoxes. (1 star -2 stars 3 stars)  (Centre-Outskirt-airport etc)

London    

Hilton    4 star        Deluxe  

I have played quite a bit but i could not do it.

Can you help?

Thanks in advance

Just add a TreeGridColumn (Hotel), a TextBoxColumn (Name) and two ComboBox columns (Star and Location) to the dataGridView. Let me know if you have problems.

-mark

DataGridView Program Manager
Microsoft
This post is provided "as-is"

HI Mark
I am Still having trouble in showing 2 combos.Can you help

I have set up a treegrid with 4 columns

Hotel TreeGridColumn
Name DataGridViewTextBoxColumn
StarRating DataGridViewComboBoxColumn
Location DataGridViewComboBoxColumn

For example sake I would like to fill the treegrid as follows:

Hotel

Hilton 4 star Central

Holiday Inn 4 star Airport

I have these 2 routines which loads the combos

private DataGridViewComboBoxColumn LoadLocation()
{

colLocation.AutoSizeMode = DataGridViewAutoSizeColumnMode.ColumnHeader;
colLocation.DataPropertyName = "Location";
colLocation.Items.AddRange(new string[] { "Centre", "Airport", "Station" });
colLocation.Sorted = true;
colLocation.SortMode = DataGridViewColumnSortMode.NotSortable;
colLocation.HeaderText = "Location";
return colLocation;
}
private DataGridViewComboBoxColumn LoadStarRating()
{
colStar.AutoSizeMode = DataGridViewAutoSizeColumnMode.ColumnHeader;
colStar.DataPropertyName = "Star";
colStar.Items.AddRange(new string[] { "1 Star", "2 Star", "3 Star","4 Star","5 Star" });
colStar.Sorted = true;
colStar.SortMode = DataGridViewColumnSortMode.NotSortable;
colStar.HeaderText = "Star Rating";
return colStar;
}

but i get lost when I need to load the grid

this does not work
private void LoadTreeGrid()
{
Font boldFont = new Font(treeGrid.DefaultCellStyle.Font, FontStyle.Bold);

TreeGridNode nodeHotel = treeGrid.Nodes.Add("Hilton",LoadStarRating(), LoadLocation());
nodeHotel.ImageIndex = 0;
nodeHotel.DefaultCellStyle.Font = boldFont;


}

I know it's wrong but I have tried many combinations.

can you help?
thanks again

Has anybody managed to use the treegrid with some combos?

Is so could you post an example?

thanks

You can help me?

I have bug in your code in treegridview

I have to TreeGridView nameflowistree1 and tree2

my code:

TreeGridNode temp = tree1.CurrentNode;

Tree1.Nodes.Remove(temp);

Tree2.CurrentNode.Nodes.Add(temp);

if i run above code 2 time,

First, I add to Tree2.CurrentNode is node1 , it okie

Next, I add to Tree2.CurrentNode is node2, temp (now is child of node2) have level equal node2

I didn't develop the sample to support adding items, that is why you get the error.

-mark
DataGridView Program Manager
Microsoft
This post is provided "as-is"

Hi, Mark

Thanks for your post.

I posted a Q yesterday :

I need to build a custom DataGridViewColumn with the cell contains a embedded DataGridView control.

I built one, it can display the “DataGridView�cell and works for edition but, when I click other cells, the DataGridView in the cell disappeared.

Please help, thanks!

Hans Guan

Mark,

The samples you provide require v2.0.50926 of the runtime - according to the error message when I attempt to execute the application.

How do I obtain this version? The .NET Framework site indicates that I have the most current version (2.0.50727) and doesn't provide a path to a newer one.

I'm looking forward to your control - it must surely beat the HierarchicalFlexGrid and the DataShape Provider of VB6.

Thank you,

Gus

Great work, Mark!

When I add different levels to the TreeGridView, I need to be able to have different column types for the same column at different levels. Is there a way to dynamically change the column type (and EditingControl) when clicking on a particular cell in a column based on the level of the row that the cell is in? Thanks!

Myles R.

Perfect. Thanks!

Myles R.

Has anyone been able to convert this to VB successfully at all.

So far I have been able to convert all classes but one (TreeGridNodeCollection.cs) and I would be apreciate any help on this because the methods for adding properties to the property grid are exactly what i am looking for, and i am interested in learning how it is done.

I learn fast from example

Hi Mark,

I have some truble converting a "normal" row to a TreeGridNode. Meaning if the row exist I cant seem to get it to be a TreeGridNode withoutthis causing a new row (TreeGridNode)to be added.

Any ideas?

Erik

Hi, thanx for your control ;)
i've a little question:
how i can retrieve cell value of child rows of a specific parent node?
i can retrive a cells values of parent node with this code:

treeGridView1.Nodes[ i ].Cells[2].Value.ToString();

but how i can retrieve cells values of child rows of a specific parent node?
sorry if it's a stupid question..

Raffaele 

for (int i = 0; i < treeGridView1.Nodes.Count; i++)
{
MessageBox.Show(treeGridView1.Nodes[ i ].Cells[0].Value.ToString());
for (int j = 0; j < treeGridView1.Nodes[ i ].Nodes.Count; j++)
{
MessageBox.Show(treeGridView1.Nodes[ i ].Nodes[ j ].Cells[0].Value.ToString());
}
}

Mark

Some years ago I wrote an application in VS2003, ManagedC++, that uses a ContainerListView control that I picked up from one of the code sites. It works like a combination TreeView and ListView. I am now in the process of moving that application to VC2005 CLR/C++ and would like to use the TreeGridView in place of the ContainerListView control.

Initially, it seems to fit the bill. However, I can't get the DataGridViewCheckBox column to work. The CheckBoxes appear empty and will not show a checkmark when clicked (three state property set to false). The DataGridViewColumn seems to work fine in a normal DataGridView control. Any Suggestions or thoughts?

Thanks

John

Has anybody got a full example apart from the ones provided by the author of this control where it shows how to use the expand mode,use of comboBoxes and other controls.

Reading all the messages people post I think that everyone likes the control but we all in a way struggle to make it work they way it should or the author intended.

Any chance of a more in depth example?

thanks a lot

Mark

What do I have to do to get CheckBoxColumns working? Clicking on the CheckBox seems to have no effect, the check mark does not appear. I really want to use this control but need CheckBoxColumn functionality. Please respond.

Thanks

Hi

Thank you for your cool control, but I have a question

How to modify it to support right to left?

Mark,

the links to TreeGridViewposted on your blog seem to be dead....

Is the code still available? I would love to put my eye on it, please.

-PL

really a gud code

but plz help me

i m unable to convert it into vb.net

can u help me

because i have to made this application in vb.net

not in c#

kindly reply me fast

at

jain.mohit14@gmail.com

thanking you

Do you have meanwhile a version available without visual styles?

- ed

I have also run into this problem, I was using the the assembly as a reference in another sample project and couldn't understand what I had done to change the code recently then it hit me I changed from the Windows XP theme.