How to change the color of a selected item by double clicking or by any method

Question

0.00/5 (No votes)

See more:

Hello
I want to change the color of a selected item in ListBox1 by DoubleClick on that item, I drew the items in different colors in formload but I could not change the color of any items after formload ,i tried double click

What I have tried:

private void FormLoad(object sender, EventArgs e)
{
    Global_A = 1;
    ListBox1.Items.AddRange(new Object[]
        { "Red Item", "Orange Item", "Purple Item" });
    ListBox1.Location = new System.Drawing.Point(81, 69);
    ListBox1.Size = new System.Drawing.Size(120,95);
    ListBox1.DrawMode = DrawMode.OwnerDrawFixed;
    ListBox1.DrawItem += new DrawItemEventHandler(ListBox1_DrawItem);
    //ListBox1.SelectedIndexChanged += new System.EventHandler(ListBox1_SelectedIndexChanged);
    Controls.Add(ListBox1);
    Global_A = 2;
    Global_id = 2;
}//FormLoad

private void ListBox1_DrawItem(object sender,
    System.Windows.Forms.DrawItemEventArgs e)
{
    if(e.Index < 0) return;
    if (Global_A == 1)
   {e.DrawBackground();
        Brush myBrush = Brushes.Black;
        switch (e.Index)
        {
            case 0: myBrush = Brushes.Red; break;
            case 1: myBrush = Brushes.Orange; break;
            case 2: myBrush = Brushes.Purple; break;
         }
        e.Graphics.DrawString(ListBox1.Items[e.Index].ToString(),
            e.Font, myBrush, e.Bounds, StringFormat.GenericDefault);
        e.DrawFocusRectangle();
   }
    else if (Global_A == 2)
   {
    e.DrawBackground();
    Graphics g = e.Graphics;
    //Brush myBrush = Brushes.Black;
    Brush myBrush2 = Brushes.Red;
    //g.FillRectangle(new SolidBrush(Color.Silver), e.Bounds);
    //e.Graphics.DrawString(ListBox1.Items[e.Index].ToString(), e.Font, myBrush, e.Bounds, StringFormat.GenericDefault);
      e.Graphics.DrawString(ListBox1.Items[id].ToString(),e.Font, myBrush2, e.Bounds, StringFormat.GenericDefault);
    e.DrawFocusRectangle();
  }//A=2
}

Posted 23-Apr-19 9:03am

Engineer khalid

Updated 23-Apr-19 22:20pm

v2

Add a Solution

Comments

[no name] 23-Apr-19 15:33pm

You'll write less code that is more intuitive in WPF / UWP / XAML.

Engineer khalid 24-Apr-19 2:41am

i have no knowldge in wpf/ UWP / XAML.
i have improved the question just now...

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2019-04-23T22:20:00

You need to set the DrawMode in order to fire DrawItem events:

private void FrmMain_Shown(object sender, EventArgs e)
    {
    myListBox.Items.Add("A - Cyan");
    myListBox.Items.Add("B - Magenta");
    myListBox.Items.Add("C - Yellow");
    myListBox.Items.Add("D - Black");
    myListBox.DrawMode = DrawMode.OwnerDrawFixed;
    }

private void MyListBox_DrawItem(object sender, DrawItemEventArgs e)
    {
    if (sender is ListBox lb)
        {
        e.DrawBackground();
        string s = lb.Items[e.Index].ToString();
        Brush brush = Brushes.Green;
        switch (s[0])
            {
            case 'A': brush = Brushes.Cyan; break;
            case 'B': brush = Brushes.Magenta; break;
            case 'C': brush = Brushes.Yellow; break;
            case 'D': brush = Brushes.Black; break;
            }
        e.Graphics.DrawString(s, e.Font, brush, e.Bounds, StringFormat.GenericDefault);
        }
    }

Will colour each item differently.