How to create an organizational chart in ASP with C# without api and HTML5 - C# Discussion Boards

Re: best way to license .net application

jschell13-Dec-13 9:55

13-Dec-13 9:55

Jassim Rahma wrote:
Can anyone suggest a best way to license my application so it requires an activation.. therefore, application will be protected from being shared with others?

The best way is a legally binding contract which was created by a competent attorney.

How to set transparent on listbox

Member 1026763012-Dec-13 0:52

Member 10267630

12-Dec-13 0:52

hi how to set transparent on listbox???

i check this tutorial :

http://www.codeproject.com/Articles/11359/Transparent-ListBox

but idont undrestand , this source for c++

http://qfs.mobi/f1077792[^]

pls help me Frown | :(

Re: How to set transparent on listbox

Simon_Whale12-Dec-13 1:03

Simon_Whale

12-Dec-13 1:03

http://stackoverflow.com/questions/15207186/custom-listbox-with-transparent-backcolor-issue[^]

was the first hit from googling : C# transparent listbox

Every day, thousands of innocent plants are killed by vegetarians.

Help end the violence EAT BACON

Re: How to set transparent on listbox

Marco Bertschi12-Dec-13 1:20

Marco Bertschi

12-Dec-13 1:20

A List box has a property called "Opacity",which you can set to a value between 0 and 100 to make your listbox transparent.

Veni, vidi, caecus

Re: How to set transparent on listbox

Member 1026763012-Dec-13 1:44

Member 10267630

12-Dec-13 1:44

thanks guys.

i find a transparent class in you tube but List box dont have a SCROLL.

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;

public class ListBox : Label
{
    public ListBox()
    {
        this.Size = new Size(165, 124);
        this.MinimumSize = new Size(25, 25);
        this.ForeColor = SystemColors.Highlight;
        this.Font = new Font("Microsoft Sans Serif", 8F, FontStyle.Regular, GraphicsUnit.Point, 0);
        this.ScrollAlwaysVisible = true;
    }

    #region Storage
    List<object> lst = new List<object>();
    Color SBorCol = Color.DarkBlue, SelCol = Color.DodgerBlue, BorCol = Color.Navy, InBorCol = Color.SlateBlue;
    string tmp = string.Empty;
    byte SelAlpha = 50;
    Size FSize;
    int _Index = -1, SIndex = 0;
    bool _Focus;
    #endregion

    #region Overrides

    protected override void OnFontChanged(EventArgs e)
    {
        base.OnFontChanged(e);
        FSize = TextRenderer.MeasureText("X", this.Font);
    }

    protected override void OnHandleCreated(EventArgs e)
    {
        base.OnHandleCreated(e);
        this.AutoSize = false;
        this.Text = string.Empty;
        this.BackColor = Color.Transparent;
    }

    protected override void OnMouseDown(MouseEventArgs e)
    {
        base.OnMouseDown(e);
        if (e.Button == MouseButtons.Left)
        {
            this.Focus();
            _Focus = true;
            _Index = -1;
            Point P = this.PointToClient(MousePosition);
            for (int i = lst.Count; i-- > 0; )
            {
                if (i < MaxCount)
                {
                    if (P.Y >= (FSize.Height * i) + 5 & P.Y < (FSize.Height * i) + (FSize.Height + 5))
                    {
                        this.Refresh();
                        _Index = i + SIndex;
                        this.CreateGraphics().FillRectangle(new SolidBrush(Color.FromArgb(SelAlpha, SelCol)), new Rectangle(5, (FSize.Height * i) + 5, this.Width - 12, FSize.Height));
                        this.CreateGraphics().DrawRectangle(new Pen(SBorCol), new Rectangle(5, (FSize.Height * i) + 5, this.Width - 12, FSize.Height));
                    }
                }
            }
        }
    }

    protected override void OnInvalidated(InvalidateEventArgs e)//
    {
        base.OnInvalidated(e);
        tmp = string.Empty;
        int Co = 0;
        for (int i = SIndex; i < lst.Count; i++)
        {
            if (Co == MaxCount) return;
            tmp += lst[i] + "\n";
            Co++;
        }
    }

    #endregion

    #region Draw

    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);
        e.Graphics.DrawRectangle(new Pen(BorCol, 4), new Rectangle(2, 2, this.Width - 5, this.Height - 5));
        e.Graphics.DrawRectangle(new Pen(InBorCol, 2), new Rectangle(4, 4, this.Width - 9, this.Height - 9));
        TextRenderer.DrawText(e.Graphics, tmp, this.Font, new Point(5, 5), this.ForeColor);
        if (_Index != -1)//Draws item highlight when scrolling
        {
            e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(SelAlpha, SelCol)), new Rectangle(5, (FSize.Height * (_Index - SIndex)) + 5, this.Width - 12, FSize.Height));
            e.Graphics.DrawRectangle(new Pen(SBorCol), new Rectangle(5, (FSize.Height * (_Index - SIndex)) + 5, this.Width - 12, FSize.Height));
        }
    }

    #endregion

    #region UserSettings

    public Color SelectBorderColor
    {
        get { return SBorCol; }
        set { SBorCol = value; }
    }

    [Browsable(false)]
    public new Color BackColor
    {
        get { return base.BackColor; }
        set { base.BackColor = Color.Transparent; }
    }

    public Color BorderColor
    {
        get { return BorCol; }
        set { BorCol = value; }
    }
    public Color BorderColorInner
    {
        get { return InBorCol; }
        set { InBorCol = value; }
    }
    public Color SelectColor
    {
        get { return SelCol; }
        set { SelCol = value; }
    }

    public byte SelectAlpha
    {
        get { return SelAlpha; }
        set
        {
            SelAlpha = value <= 100 ? value : (byte)50;
        }
    }

    #endregion

    #region Functions

    public void Add(object Value)
    {
        if (Value == null) return;
        int i;
        if ((i = lst.IndexOf(Value)) == -1)
        {
            lst.Add(Value);
        }
        this.Invalidate();
        
    }

    [Browsable(false)]
    public int SelectedIndex
    {
        get { return _Index; }
    }

    public void RemoveAt(int Index)
    {
        if (Index != -1 & Index <= lst.Count)
        {
            lst.RemoveAt(Index);
            this.Invalidate();
        }
    }

    public void Remove(object Value)
    {
        if (Value == null) return;
        int i;
        if ((i = lst.IndexOf(Value)) != -1)
        {
            lst.RemoveAt(i);
            this.Invalidate();
        }
    }

    public bool Contains(object Value)
    {
        return lst.Contains(Value);
    }

    public void Clear()
    {
        lst.Clear();
        this.Invalidate();
    }

    int MaxCount
    {
        get
        {
            return ((this.Height - 8) / FSize.Height);
        }
    }

    [Browsable(false)]
    public object SelectedItem
    {
        get
        {
            return SelectedIndex != -1 ? lst[_Index] : null;
        }
    }

    #endregion

    #region Disabled Settings
    [Browsable(false)]
    public override string Text { get; set; }

    [Browsable(false)]
    public override bool AutoSize { get; set; }

    [Browsable(false)]
    public new BorderStyle BorderStyle { get; set; }

    [Browsable(false)]
    public new FlatStyle FlatStyle { get; set; }

    [Browsable(false)]
    public new Image Image { get; set; }

    [Browsable(false)]
    public new Image ImageAlign { get; set; }

    [Browsable(false)]
    public new Image ImageIndex { get; set; }

    [Browsable(false)]
    public new Image ImageKey { get; set; }

    [Browsable(false)]
    public new Image ImageList { get; set; }

    [Browsable(false)]
    public new Size MinimumSize { get; set; }

    [Browsable(false)]
    public new DockStyle Dock { get; set; }

    [Browsable(false)]
    public new HorizontalAlignment TextAlign { get; set; }

    [Browsable(false)]
    public new bool UseWaitCursor { get; set; }
    #endregion

    #region Scroll Code

    protected override void OnMouseWheel(MouseEventArgs e)
    {
        base.OnMouseWheel(e);
        if (_Focus)
        {
            if (e.Delta > 0)
            {
                if (SIndex > 0)
                    SIndex--;
            }
            else
            {
                if ((SIndex + MaxCount) >= lst.Count) return;
                if (SIndex <= (lst.Count - 1))
                    SIndex++;
            }
            this.Refresh();
        }
    }
    

    protected override void OnMouseEnter(EventArgs e)
    {
        base.OnMouseEnter(e);
    }

    protected override void OnMouseLeave(EventArgs e)
    {
        base.OnMouseLeave(e);
        _Focus = false;
    }
    #endregion


    public bool ScrollAlwaysVisible { get; set; }
}

when write the class then click build solution and make new listbox in toolbox,

can help me to set Scroll??????

serial port data read

Member 1026351912-Dec-13 0:15

Member 10263519

12-Dec-13 0:15

hi'
am developing project on hand held system,my view is : select the file(excel)by clicking browse. then click on upload.
here it's going to that device but after receiving data that device needs to send "$OK#" back to my program how can i receive that . plz help how to do tha

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel=Microsoft.Office.Interop.Excel;
using System.IO;
using System.Threading;
using System.IO.Ports;



namespace Hand_Held_Data_Transporter
{
    public partial class Form1 : Form
    {
        int[] stream_buffer;
      
        
        

        /*private static Microsoft.Office.Interop.Excel.Workbook mWorkBook;
        private static Microsoft.Office.Interop.Excel.Sheets mWorkSheets;
        private static Microsoft.Office.Interop.Excel.Worksheet mWSheet1;
        private static Microsoft.Office.Interop.Excel.Application oXL;*/

        public Form1()
        {
            InitializeComponent();
            progressBar1.Enabled = false;
            progressBar2.Enabled = false;

            serialPort1.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serialPort1_DataReceived);
           
        }



        private void Browse_Click(object sender, EventArgs e)
        {

            OpenFileDialog fdlg = new OpenFileDialog();
            fdlg.Filter = "All Files(*.*)|*.*";
            if (fdlg.ShowDialog() == DialogResult.OK)
            {


                textBox1.Text = fdlg.FileName;
                File.ReadAllText(textBox1.Text);

            }
        }

       



        private void Upload_Click(object sender, EventArgs e)
        {

           // StringBuilder sb = new StringBuilder();
  

            Excel.Application xlApp = new Excel.Application();
            Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(textBox1.Text, 0, true, 5, "", "", true, Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
            Excel._Worksheet xlWorksheet = (Excel._Worksheet)xlWorkbook.Sheets[1];
            Excel.Range xlRange = xlWorksheet.UsedRange;

            int rowCount = xlRange.Rows.Count;
            int colCount = xlRange.Columns.Count;
            progressBar1.Visible = true;
            

            int k = 100 / rowCount;

            for (int i = 1; i <= rowCount; i++)
            {

                String final = null;
                String upload1 = null, upload2 = null, upload3 = null, upload4 = null, upload5 = null,upload6=null,upload7=null;
                for (int j = 1; j <= colCount; j++)
                {

                    if (j == 1)
                      upload1 = xlRange.Cells[i, j].Value.ToString();
                 

                        //upload1 = xlRange.Cells[i, j].Value.ToString();
                    if (j == 2)
                        upload2 = xlRange.Cells[i, j].Value.ToString();
                   
                  
                    if (j == 3)
                        upload3 = xlRange.Cells[i, j].Value.ToString();
                
                    if (j == 4)
                        upload4= xlRange.Cells[i, j].Value.ToString();
                    
                     if (j == 5)
                         upload5 = xlRange.Cells[i, j].Value.ToString();
                     
                    if (j == 6)
                        upload6= xlRange.Cells[i, j].Value.ToString();
                    
                    if (j == 7)
                        upload7 = xlRange.Cells[i, j].Value.ToString();
                    

                    final = "$ POST," + upload1 + "," + upload2 + "," + upload3 + "," + upload4 + "," + upload5 + "," + upload6 + "," + upload7 + " # ";


                }

                if (serialPort1.IsOpen)

                   serialPort1.Write(final);
                serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);

                MessageBox.Show(final);
                if (progressBar1.Value < 100)
                {
                    Thread.Sleep(1000);
                    progressBar1.Value += k;
                }


            }
            progressBar1.Value = 100;

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            progressBar1.Visible = false;
            progressBar2.Visible = false;
           serialPort1.Open();
            
        }

        private void Download_Click(object sender, EventArgs e)
        {
            Excel.Application xlApp = default(Excel.Application);
            Excel.Workbook xlWorkBook = default(Excel.Workbook);
            Excel.Worksheet xlWorkSheet = default(Excel.Worksheet);
            serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);
            string fName = @"C:\STL\Download\Download_" + DateTime.Now.ToString("dd MMM YY HH mm").Trim() + ".xls ";
            try
            {
           
                object misValue = System.Reflection.Missing.Value;
                xlApp = new Excel.Application();
                xlWorkBook = xlApp.Workbooks.Add(misValue);
                xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
                xlWorkSheet.Cells[1, 1] = "Name";
                xlWorkSheet.Cells[1, 2] = "ID Number";
                xlWorkSheet.Cells[1, 3] = "Installment";
                xlWorkSheet.Cells[1, 4] = "Paid Amount";
                xlWorkSheet.Cells[1, 5] = "Due Amount";

                xlWorkSheet.Cells[1, 1].Interior.ColorIndex = 39;
                xlWorkSheet.Cells[1, 2].Interior.ColorIndex = 39;
                xlWorkSheet.Cells[1, 3].Interior.ColorIndex = 39;
                xlWorkSheet.Cells[1, 4].Interior.ColorIndex = 39;
                xlWorkSheet.Cells[1, 5].Interior.ColorIndex = 39;

               // serialPort1.Open();
               // String s = "$GET,Chsum#";
               // if (serialPort1.IsOpen)
              //  {
                  //  serialPort1.WriteLine(s);
                    
                  // String s1= serialPort1.ReadLine();
                  // MessageBox.Show(s1);
               // }


                xlWorkBook.SaveAs(fName, Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
                xlWorkBook.Close(true, misValue, misValue);
                xlApp.Quit();
                releaseObject(xlWorkSheet);
                releaseObject(xlWorkBook);
                releaseObject(xlApp);
            }
            finally
            {
                if (xlApp != null)
                    releaseObject(xlApp);
                if (xlWorkBook != null)
                    releaseObject(xlWorkBook);
                if (xlWorkSheet != null)
                    releaseObject(xlWorkSheet);
            }
            if (System.IO.File.Exists(fName))
            {
                if (MessageBox.Show("Would you like to open the excel file?", this.Text, MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {
                    try
                    {
                        System.Diagnostics.Process.Start(fName);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("Error opening the excel file." + Environment.NewLine +
                          ex.Message, this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }
            

            }
        private void releaseObject(object obj)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                obj = null;
            }
            catch (Exception ex)
            {
                obj = null;
                MessageBox.Show("Unable to release the Object " + ex.ToString());
            }
            finally
            {
                GC.Collect();
            }
        }

        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            try
            {
                String inputdata = serialPort1.ReadExisting();
                MessageBox.Show(inputdata);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }


            //this method will execute when buffer is full
          /*  stream_buffer[0] = serialPort1.ReadByte();   //read 1st byte
            stream_buffer[1] = serialPort1.ReadByte();   //read another byte and so on
            stream_buffer[2] = serialPort1.ReadByte();
            stream_buffer[3] = serialPort1.ReadByte();
            stream_buffer[4] = serialPort1.ReadByte();
            stream_buffer[5] = serialPort1.ReadByte();
            stream_buffer[6] = serialPort1.ReadByte();

             StreamWriter MyStreamWriter = new StreamWriter(@"c:\Testing.txt, true");
             for (int i = 0; i < 7;i++ )
                 MyStreamWriter.Write(stream_buffer[i]);

            MyStreamWriter.Flush();

            MyStreamWriter.Close();


            for (int j = 0; j < 7; j++)
                textBox1.Text = Convert.ToString(stream_buffer[j]);*/



        }

       

       
        }
    }

Re: serial port data read

Marco Bertschi12-Dec-13 1:22

Marco Bertschi

12-Dec-13 1:22

Arduino, C#, and serial interface[^]
Serial Comms in C# for Beginners[^]
SO[^]

Now you got the knowledge sources, start thinking and being productive!

Veni, vidi, caecus

How to create an organizational chart in ASP with C# without api and HTML5

Member 1039478611-Dec-13 8:11

Member 10394786

11-Dec-13 8:11

I have to create a web app using ASP .Net and C#. Here we use only IE 8, so I can't use HTML5 and CSS 3 to create this app.

I have to show an organizational chart where data is dynamic and the user has to be able to select a card in the chart and delete it, edit it, and more.

I've been trying with treeview, but it's vertical.

Thank you for your answers, and sorry because the english.

Re: How to create an organizational chart in ASP with C# without api and HTML5

Dave Kreskowiak11-Dec-13 11:30

Dave Kreskowiak

11-Dec-13 11:30

Good Luck!

That's about all I can say as you haven't asked a question.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: How to create an organizational chart in ASP with C# without api and HTML5

Richard MacCutchan11-Dec-13 21:18

Richard MacCutchan

11-Dec-13 21:18

Try https://www.google.com/search?q=organisation+chart+asp.net+c%23[^].

Veni, vidi, abiit domum

How I can find selected control on any window from mouse click c#

delphix510-Dec-13 4:57

delphix5

10-Dec-13 4:57

SQL

Hello

How I can find selected control on any window from mouse click c#

I want to snapshot the object when mouse click
thanks

Re: How I can find selected control on any window from mouse click c#

Abhinav S10-Dec-13 5:09

Abhinav S

10-Dec-13 5:09

Try

private void Control_Clicks(object sender, EventArgs e)
{
    Control control = (Control)sender;   
    MessageBox.Show(control.Name.ToString());
}

Apps - Color Analyzer | Arctic | XKCD | Sound Meter | Speed Dial

Re: How I can find selected control on any window from mouse click c#

delphix510-Dec-13 5:16

delphix5

10-Dec-13 5:16

see this

IntPtr hWnd = WindowFromPoint(Control.MousePosition);


     if (hWnd != IntPtr.Zero)
     {
         Control ctl = Control.FromHandle(hWnd);
         if (ctl != null)
             label1.Text = ctl.Name;
     }

it works inside the form I need it ouside the form to snapshot the control when mouse click.

thanks

Re: How I can find selected control on any window from mouse click c#

Dave Kreskowiak10-Dec-13 5:43

Dave Kreskowiak

10-Dec-13 5:43

That's not going to work. Control will only work with windows in your application.

I take it you're trying to get a screenshot of any window? BTW, every control is its own little window, not just the large thing you see with a titlebar and a bunch of controls on it and drag around.

You can't do what you want using the .NET classes. You have to P/Invoke Win32 functions to do this. For a good example, look at this[^], which refers to this library[^].

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: How I can find selected control on any window from mouse click c#

delphix510-Dec-13 6:55

delphix5

10-Dec-13 6:55

I do not want to snapshot window or fullscreen or region,I want snapshot object when mouse click on that object.

Object capture. The object can be window, control, windows shortcut menu etc.

Re: How I can find selected control on any window from mouse click c#

Eddy Vluggen10-Dec-13 8:06

Eddy Vluggen

10-Dec-13 8:06

You'd need to dive into the WinAPI; getting access to a window (on a low level, everything, including textboxes and buttons, are windows) using it's handle. You'd not be able to map a TButton (from a Delphi App) to a .NET Button, but you should be able to get the dimensions of the window. That is, assuming that it is based on a window.

See, there was a time when these things were expensive and Windows would run out of handles. The easiest solution to lower the amount of windows used in an application was to get rid of the labels and to draw them by hand. You'll find that there's a lot of older apps (and newer games!) that don't use the common control-library at all. If I draw a fake button on a panel and handle a mouse-click on that location as if it were a button, you'd see a button as a user, but would never find one on the form.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Re: How I can find selected control on any window from mouse click c#

BillWoodruff10-Dec-13 5:52

BillWoodruff

10-Dec-13 5:52

You are going to need to set a Global Mouse Hook. There's an excellent article here on CP, since 2004 !, by George Mamaladze on how to do this: [^].

If, by "snapshot" the clicked Control, you mean do a bitmap screen capture: yes, as Dave K. said, you are going to get into heavy use of the Win API and Platform Invoke. Search CodeProject for articles on screen capture.

I suspect (but don't have personal experience with) that once you know the Window (the app) that got the Click, that getting hold of the Control will require some clever coding.

"What Turing gave us for the first time (and without Turing you just couldn't do any of this) is he gave us a way of thinking about and taking seriously and thinking in a disciplined way about phenomena that have, as I like to say, trillions of moving parts.

Until the late 20th century, nobody knew how to take seriously a machine with a trillion moving parts. It's just mind-boggling." Daniel C. Dennett

Re: How I can find selected control on any window from mouse click c#

delphix510-Dec-13 7:03

delphix5

10-Dec-13 7:03

thanks for your help my friends

I already see the code but it has some issues.

so if you find away to take snapshot of object when mouse click
do not forget me.

thanks again friends

Re: How I can find selected control on any window from mouse click c#

GuyThiebaut10-Dec-13 22:35

GuyThiebaut

10-Dec-13 22:35

For an article on capturing a specified portion of the screen - see this article clickety[^] by yours truly.

“That which can be asserted without evidence, can be dismissed without evidence.”

― Christopher Hitchens

List<> VS Dictionary<,>

HobbyProggy9-Dec-13 22:14

HobbyProggy

9-Dec-13 22:14

Hi there,

my question is what might fit better to storing objects.

I have a routine where i save ListViewItems and another for storing objects (selfmade class Resource) into a Dictionary.
But my collegue told me i should use a List<> because they are better.

I missed the why they are better.
So anyone can explain me why they should be better and whats the significant difference?

EDIT:

To explain more specific:

I need a container to store objects of my models that will be generated by Loops according to the data provided by my database.

e.g.:

I have a class Resource

public class Resource
    {
        MSSQL _dbIMS = null;
        SqlGenerator _sqlGenerator = null;

        private string _name = "";
        private string _firstName = "";
        private string _idEmployee = "";
        private string _idCalendar = "";
        private string _idBenDivFaeh = "";
        private string _personalID = "";
        private string _phoneNumber = "";
        private string _costCentre = "";
        private double _costsPerHour = 0.0;
        private string _idDivision = "";
        private bool _modified = false;

This will be generated after i loaded the values out of the database. Those objects then need to be stored somewhere so i can add them to a ListView.

Later on i will have those ListViewItems related to a advTree with projects and to another with divisions, the ListViewItems can be dragged and dropped onto the advTrees to modify the relation to a division for example.

So where to store the objects of the resource? List or Dictionary?

I hope this is a better explanation

Thanks in advance

if(this.signature != "")
{
MessageBox.Show("This is my signature: " + Environment.NewLine + signature);
}
else
{
MessageBox.Show("404-Signature not found");
}

modified 10-Dec-13 4:32am.

Re: List<> VS Dictionary<,>

Marco Bertschi9-Dec-13 22:24

Marco Bertschi

9-Dec-13 22:24

Explanation about Dictionaries[^]

You haven't provided much info about why you think you need to use a Dictionary - There is a reason why they exist, but there is also a reason why a List type exists.

Dictionaries are usually used to bind unrelated objects - If you need no binding to unrelated objects you better use a List.

A Dictionary may be useful if you want to pair numbers with their textual representation (1 = one, 2= two) etc. but it is going to fail on you if you need to store complex objects.

Veni, vidi, caecus

Re: List<> VS Dictionary<,>

Pete O'Hanlon9-Dec-13 22:59

Pete O'Hanlon

9-Dec-13 22:59

List and Dictionary are meant for completely different purposes. It's like saying which is best, Beethoven or a horse? You store the objects in the container that best fits your needs. So, if you need a keyed lookup of your objects for efficient retrieval, a Dictionary is a better bet than a List. If, however, all you need is somewhere to store data and you aren't that bothered about searching for it, a List is a good choice.

Re: List<> VS Dictionary<,>

HobbyProggy9-Dec-13 23:10

HobbyProggy

9-Dec-13 23:10

thanks for the explanations Smile | :)

and for the great article about dictionarys.

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Re: List<> VS Dictionary<,>

Keith Barrow10-Dec-13 2:07

Keith Barrow

10-Dec-13 2:07

Just to add to Pete's answer, you might want to Google for tutorials on "data structures" (which both Lists and Dictionaries are). Each has it own uses, and you can save yourself a stack^* of work using the correct one. In my experience List and Dictionary are the two I most commonly use c#, but YMMV, it's worth knowning about the others.

^*intended.

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Re: List<> VS Dictionary<,>

Ravi Bhavnani12-Dec-13 9:37

Ravi Bhavnani

12-Dec-13 9:37

Pete O'Hanlon wrote:
List and Dictionary are meant for completely different purposes. It's like saying which is best, Beethoven or a horse?

+500

/ravi

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