C# Discussion Boards - CodeProject

What's the best collection

23-Jun-09 1:24

musefan wrote:
RightToLeft set to yes

Why ? Doesn't this seem like it could be the issue ?

Christian Graus

Driven to the arms of OSX by Vista.

"! i don't exactly like or do programming and it only gives me a headache." - spotted in VB forums.

I can do things with my brain that I can't even google. I can flex the front part of my brain instantly anytime I want. It can be exhausting and it even causes me vision problems for some reason. - CaptainSeeSharp

Re: Label issue in Vista

musefan23-Jun-09 1:30

musefan

23-Jun-09 1:30

Yep

That's the problem. I set that to make sure it auto sizes in the right direction. But I will change it to default now and move the label with code if need be.

Still I would have expected all characters to be reversed thou.

Anyway, Thanks Wink | ;)

Life goes very fast. Tomorrow, today is already yesterday.

CodingLover23-Jun-09 0:56

CodingLover

23-Jun-09 0:56

Hi all,

I want to do something like this.

A collection, which is not sorted in insertion(added in the next index) and avoid duplicate. Which can I use?

Thanks. Smile | :)

I appreciate your help all the time...
CodingLover Smile | :)

Christian Graus23-Jun-09 1:01

23-Jun-09 1:01

There is no set class in .NET. You'd have to add set behaviour to a list, by searching for items and not inserting them if they exist.

DaveyM6923-Jun-09 1:10

DaveyM69

23-Jun-09 1:10

AFAIK there isn't one. You can always create your own and use new a new Add method - something like

public class MyList<T> : List<T>
{
    public new void Add(T item)
    {
        if (!Contains(item))
            base.Add(item);
    }
}

You'll need to do something similar for AddRange, and keep track of any changing items to make sure they don't create duplicates.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

http://vivekragunathan.spaces.live.com

kb-boxer23-Jun-09 1:53

kb-boxer

23-Jun-09 1:53

There is library available from Wintellect that has unordered set, the one you are looking for. You might try it if you wish.

Programming is an art. Code is a poem

Rob Philpott23-Jun-09 2:16

Rob Philpott

23-Jun-09 2:16

It's worth remembering that there isn't a one-size-fits all algorithm to do stuff like this. The framework provides a set of general purpose collections and algorithms, but they might not be good enough in specific scenarios.

An unsorted list, which is what I understand you want, is going to be very slow at detecting duplicates. And its going to seriously degrade if you've got lots and lots of things in your collection. It might be worth running two data structures alongside each other to mitigate this.

So, roughly how many things are you going to insert into this? Is memory consumption an issue for you? Can we remove duplicates later on, or does it have to be done on insertion?

Regards,
Rob Philpott.

Re: WPF.... GRID.... !! am lost

Mirko198023-Jun-09 2:17

Mirko1980

23-Jun-09 2:17

If you can use .NET 3.5, there is an HashSet class.
Otherwise, you have to build one, as others have said.

[Message Deleted]

yams251023-Jun-09 0:36

yams2510

23-Jun-09 0:36

[Message Deleted]

Christian Graus23-Jun-09 0:57

WinRTP on .NET C# Platform for streaming

23-Jun-09 0:57

We have a WPF forum. Try to speak english, 'dat' is not a word, for example.

If your control is data bound using an observable collection, swapping the items in the collection, will swap them in the control.

Re: [Message Deleted]

EliottA23-Jun-09 3:32

EliottA

23-Jun-09 3:32

Try not to delete questions, often people get referenced to these questions. Deleting them is pointless.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

ray_ronnaret23-Jun-09 0:09

ray_ronnaret

23-Jun-09 0:09

Please help
I am developing a CISCO IPPhone Solutions, and one of the feature is RTP streaming. As I search on the the web (including on CISCO) there is no any simple exmple how to implement this. However, on codeproject, I found one but seem like not match with my requirment. WinRTP should the correct solution, but I have no idea about it. Can any one englight me please.

Thank for advacned.

MS Chart - Problem to display the records in Range Column Chart

Jegansinna23-Jun-09 0:01

Jegansinna

23-Jun-09 0:01

Dear All,

Our requirement is a cab has assigned to Pick and Drop the employee for each and every shifts for the selective date. So, we need to show how much distance a cab has travelled, then we need to show that cab has been assigned for Pick/Drop for all the selective date.

As per my Procedure we can get the "Shift Date Time", "Cab No", "Pick/Drop" value, etc....

In Range chart I need to show the "Shift Time" in "X Axis" like "9 AM", "10 AM", "11 AM".....upto Next day "8 AM".
then In "Y Axis" I need to show "Shift Date Time" & "Cab No." which come from table.

In "Y Axis" i can not show the "Shift Date Time", So, I tried to show in "X Axis", but I can show only shift Date not time.
Actually I need to show the shift date in "Y Axis" only.

If any one have the solution, Please reply me.

Thanks in Advance.

Regards,
Jegan.K
9994388922

Jegan

Datagridview [modified]

mjelten22-Jun-09 23:55

mjelten

22-Jun-09 23:55

Hi!

I have ha promblem with adding items to a DataGridViewComboBoxCell. This is what I am doing.

private void SetUpforDataGridView()
{
dataGridViewSearched.ColumnCount = 5;
dataGridViewSearched.ColumnHeadersDefaultCellStyle.BackColor = Color.Navy;
dataGridViewSearched.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
dataGridViewSearched.ColumnHeadersDefaultCellStyle.Font =
new Font(dataGridViewSearched.Font, FontStyle.Bold);

dataGridViewSearched.Name = "Users Searched";
dataGridViewSearched.AutoSizeRowsMode =
DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders;
dataGridViewSearched.ColumnHeadersBorderStyle =
DataGridViewHeaderBorderStyle.Single;
dataGridViewSearched.CellBorderStyle = DataGridViewCellBorderStyle.Single;
dataGridViewSearched.GridColor = Color.Black;
dataGridViewSearched.RowHeadersVisible = false;
dataGridViewSearched.Dock = DockStyle.Fill;

DataGridViewComboBoxColumn dataGridViewcombobox = new DataGridViewComboBoxColumn();

dataGridViewSearched.Columns.Add(dataGridViewcombobox);

dataGridViewSearched.Columns[0].Name = "UserId";
dataGridViewSearched.Columns[1].Name = "Förnamn";
dataGridViewSearched.Columns[2].Name = "Efternamn";
dataGridViewSearched.Columns[3].Name = "Legitimation";
dataGridViewSearched.Columns[4].Name = "Yrkesroll";
dataGridViewSearched.Columns[5].Name = "Enheter";
dataGridViewSearched.Columns[5].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;

dataGridViewSearched.Columns[0].Visible = false;
dataGridViewSearched.Columns[0].DefaultCellStyle.Font =
new Font(dataGridViewSearched.DefaultCellStyle.Font, FontStyle.Italic);

dataGridViewSearched.SelectionMode =
DataGridViewSelectionMode.FullRowSelect;
dataGridViewSearched.MultiSelect = false;
}

And the I am trying to set the table with an object it works fine with the text propertis but not with the DataGridViewComboBoxCell.

public void BindUserList(List<User> userList)
{
dataGridViewSearched.Rows.Clear();
object[] row = new object[5];

foreach (User p in userList)
{
row[0] = p.UserId;
row[1] = p.FirstName;
row[2] = p.LastName;
row[3] = p.MedicalProfession;
row[4] = p.ProfessionalRole;

dataGridViewSearched.Rows.Add(row);

foreach (var unit in p.UnitActivationPeriods)
{
((DataGridViewComboBoxCell)dataGridViewSearched.Rows[dataGridViewSearched.Rows.Count - 1].Cells[5]).Items.Add(unit.ToString());
}
dataGridViewSearched.Rows[dataGridViewSearched.Rows.Count - 1].Tag = p;

}
labelNumberOfUsers.Text = userList.Count.ToString();
dataGridViewSearched.Refresh();
}

Thanks, Mjelten

modified on Tuesday, June 23, 2009 6:51 AM

A better way

Sevententh22-Jun-09 23:44

Sevententh

22-Jun-09 23:44

Is there a better way to code the second foreach...?

bool blnAccepted = false;
IList<Country> ftList = svc.GetCountryList;
IList<County> CountyList = svc.GetCountyList;

                foreach (Country c in ftList)
                {
                    blnAccepted = false;
                    foreach (County ic in CountyList)
                    {
                        if (ic.County == c.County)
                        {
                            blnAccepted = true;
                            break;
                        }
                    }

                    if (blnAccepted)
                    {
//Do work
                    }
                }

Christian Graus23-Jun-09 1:00

23-Jun-09 1:00

Yes, I would imagine that creating a map of countries to counties would allow you to do a single lookup. I'm not sure I follow your overall logic, but if you're doing this second loop a lot, a lookup in a hashtable will make it quicker. That's assuming you need to lookup a county for a country. If you just want to see if it exists, then keep a sorted list, so you can perform a search on it, faster than looking through the whole list.

dan!sh 23-Jun-09 1:02

dan!sh

23-Jun-09 1:02

Use Contains method in of the list.

http://vivekragunathan.spaces.live.com

kb-boxer23-Jun-09 2:04

kb-boxer

23-Jun-09 2:04

If you are using C# 3.X and above, you can use the extension methods of IEnumerable<t>; the one you are looking for is Intersect. So ftList.Intersect(CountyList) gives you a collection of all elements of ftList that are present in CountyList. Hope that helps!

Programming is an art. Code is a poem

Sevententh23-Jun-09 3:57

Sevententh

23-Jun-09 3:57

How does this work for different classes? I simplified the code earlier, so this is what I have:

Table Def:
Locations: ID, Description, TypeID, ParentID
LocationType: TypeID, Description

Rows in Location:
1 England 1 0
2 France 1 0
3 London 2 1
4 Hampshire 2 1
5 Dorest 2 1
6 Portsmouth 3 4
6 Paris 2 2
etc....

Rows in LocationType:
1 Country
2 Regions
3 Cities
4 Hospitals
5 Hotels

I now have a hierarchy of locations, each with a specific type.

So how do I use ftList.Intersect(Type) on just the TypeID?
Foreach (ftList.Intersect(TypeID = 2 | 4 | 5 )) ???

S. Senthil Kumar23-Jun-09 6:26

S. Senthil Kumar

23-Jun-09 6:26

For arbitrary filtering, use the Where extension method - you pass in a predicate to that method which can use any of the properties of your object.

Regards
Senthil [MVP - Visual C#]
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