text color change in listbox control on winform

[pothik05]

Hello

I am trying to change the color of individual entry in the listbox control
based on some custom event. Can anyone please give any idea how to do it?

Thanks

[Morten Wennevik]

Hi pothik05,

You need to handle the drawing for all items in the ListBox using DrawMode.OwnerDrawnFixed/Variable and the DrawItem event.

This sample uses a ListBox where one of the items in the list is the string "Two". This item will be colored Red and if selected highlighted with bold red.

private void listBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
e.DrawBackground();
Brush textBrush = SystemBrushes.ControlText;
Font drawFont = e.Font;

if(listBox1.Items[e.Index].ToString() == "Two")
{
textBrush = Brushes.Red;
if((e.State & DrawItemState.Selected) > 0)
drawFont = new Font(drawFont.FontFamily, drawFont.Size, FontStyle.Bold);
}
else if((e.State & DrawItemState.Selected) > 0)
{
textBrush = SystemBrushes.HighlightText;
}

e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), drawFont, textBrush, e.Bounds);
}

Instead of calling e.DrawBackGround you could customize your own background drawing code as well. Just remember to test for DrawItemState.Selected and use SystemBrushes.Highlight as the selected background color.

--
Happy coding!
Morten Wennevik [C# MVP]

[pothik05]

Thanks Morten. Actually I could do this. What I need to do is following:

After the Listbox is loaded, I have button and a text box. The text box
takes an input (the listitem index) and based on that input I need to change
the color to green of that listitem of the button's click event.

Thanks for your input.

"Morten Wennevik" wrote:

Hi pothik05,

You need to handle the drawing for all items in the ListBox using DrawMode.OwnerDrawnFixed/Variable and the DrawItem event.

This sample uses a ListBox where one of the items in the list is the string "Two". This item will be colored Red and if selected highlighted with bold red.

private void listBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
e.DrawBackground();
Brush textBrush = SystemBrushes.ControlText;
Font drawFont = e.Font;

if(listBox1.Items[e.Index].ToString() == "Two")
{
textBrush = Brushes.Red;
if((e.State & DrawItemState.Selected) > 0)
drawFont = new Font(drawFont.FontFamily, drawFont.Size, FontStyle.Bold);
}
else if((e.State & DrawItemState.Selected) > 0)
{
textBrush = SystemBrushes.HighlightText;
}

e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), drawFont, textBrush, e.Bounds);
}

Instead of calling e.DrawBackGround you could customize your own background drawing code as well. Just remember to test for DrawItemState.Selected and use SystemBrushes.Highlight as the selected background color.

--
Happy coding!
Morten Wennevik [C# MVP]

[pothik05]

Thanks Morten. Actually I could do this. What I need to do is following:

After the Listbox is loaded, I have button and a text box. The text box
takes an input (the listitem index) and based on that input I need to change
the color to green of that listitem of the button's click event.

Thanks for your input.

"Morten Wennevik" wrote:

Hi pothik05,

You need to handle the drawing for all items in the ListBox using DrawMode.OwnerDrawnFixed/Variable and the DrawItem event.

This sample uses a ListBox where one of the items in the list is the string "Two". This item will be colored Red and if selected highlighted with bold red.

private void listBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
e.DrawBackground();
Brush textBrush = SystemBrushes.ControlText;
Font drawFont = e.Font;

if(listBox1.Items[e.Index].ToString() == "Two")
{
textBrush = Brushes.Red;
if((e.State & DrawItemState.Selected) > 0)
drawFont = new Font(drawFont.FontFamily, drawFont.Size, FontStyle.Bold);
}
else if((e.State & DrawItemState.Selected) > 0)
{
textBrush = SystemBrushes.HighlightText;
}

e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), drawFont, textBrush, e.Bounds);
}

Instead of calling e.DrawBackGround you could customize your own background drawing code as well. Just remember to test for DrawItemState.Selected and use SystemBrushes.Highlight as the selected background color.

--
Happy coding!
Morten Wennevik [C# MVP]

[pothik05]

Thanks Morten. Actually I could do this. What I need to do is following:

After the Listbox is loaded, I have button and a text box. The text box
takes an input (the listitem index) and based on that input I need to change
the color to green of that listitem of the button's click event.

Thanks for your input.

"Morten Wennevik" wrote:

Hi pothik05,

You need to handle the drawing for all items in the ListBox using DrawMode.OwnerDrawnFixed/Variable and the DrawItem event.

This sample uses a ListBox where one of the items in the list is the string "Two". This item will be colored Red and if selected highlighted with bold red.

private void listBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
e.DrawBackground();
Brush textBrush = SystemBrushes.ControlText;
Font drawFont = e.Font;

if(listBox1.Items[e.Index].ToString() == "Two")
{
textBrush = Brushes.Red;
if((e.State & DrawItemState.Selected) > 0)
drawFont = new Font(drawFont.FontFamily, drawFont.Size, FontStyle.Bold);
}
else if((e.State & DrawItemState.Selected) > 0)
{
textBrush = SystemBrushes.HighlightText;
}

e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), drawFont, textBrush, e.Bounds);
}

Instead of calling e.DrawBackGround you could customize your own background drawing code as well. Just remember to test for DrawItemState.Selected and use SystemBrushes.Highlight as the selected background color.

--
Happy coding!
Morten Wennevik [C# MVP]

[Morten Wennevik]

Well, in that case you can just test for

if(e.Index.ToString() == textBox1.Text)
On Fri, 06 May 2005 17:20:13 +0200, pothik05 <po******@discussions.microsoft.com> wrote:

Thanks Morten. Actually I could do this. What I need to do is following:

After the Listbox is loaded, I have button and a text box. The text box
takes an input (the listitem index) and based on that input I need to change
the color to green of that listitem of the button's click event.

Thanks for your input.

--
Happy coding!
Morten Wennevik [C# MVP]

[pothik05]

Thanks. It works. How do I make the the CheckedListBox work the same way. It
seems no to work.

"Morten Wennevik" wrote:

Well, in that case you can just test for

if(e.Index.ToString() == textBox1.Text)
On Fri, 06 May 2005 17:20:13 +0200, pothik05 <po******@discussions.microsoft.com> wrote:

Thanks Morten. Actually I could do this. What I need to do is following:

After the Listbox is loaded, I have button and a text box. The text box
takes an input (the listitem index) and based on that input I need to change
the color to green of that listitem of the button's click event.

Thanks for your input.

--
Happy coding!
Morten Wennevik [C# MVP]

[Morten Wennevik]

Unlike what I said in another thread, and like someone else said in the same thread, create your own CheckedListBox version by inheriting from CheckedListBox and override the OnDrawItem event

class MyCheckedListBox : CheckedListBox
{
protected override void OnDrawItem(DrawItemEventArgs e)
{
// this code is called without specifying DrawMode
}
}

--
Happy coding!
Morten Wennevik [C# MVP]

[pothik05]

Thanks

"Morten Wennevik" wrote:

Unlike what I said in another thread, and like someone else said in the same thread, create your own CheckedListBox version by inheriting from CheckedListBox and override the OnDrawItem event

class MyCheckedListBox : CheckedListBox
{
protected override void OnDrawItem(DrawItemEventArgs e)
{
// this code is called without specifying DrawMode
}
}

--
Happy coding!
Morten Wennevik [C# MVP]