Kolor tła elementu ListBox (winforms)
Jak ustawić kolor tła określonego elementu w systemie.Okna.Formularze.ListBox? Chciałbym móc ustawić wiele z nich, jeśli to możliwe.
5 answers
Prawdopodobnie jedynym sposobem, aby to osiągnąć, jest samodzielne narysowanie przedmiotów.
Ustaw DrawMode
na OwnerDrawFixed
I Zakoduj coś takiego na zdarzeniu DrawItem:
private void listBox_DrawItem(object sender, DrawItemEventArgs e)
{
e.DrawBackground();
Graphics g = e.Graphics;
g.FillRectangle(new SolidBrush(Color.Silver), e.Bounds);
// Print text
e.DrawFocusRectangle();
}
Drugą opcją byłoby użycie ListView, chociaż mają one inny sposób implementacji (nie tak naprawdę związany z danymi, ale bardziej elastyczny w postaci kolumn)
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2008-09-18 11:28:45
Dzięki za odpowiedź Grada van Horcka , poprowadziła mnie we właściwym kierunku.
Aby wspierać tekst (nie tylko kolor tła) oto mój w pełni działający kod:
//global brushes with ordinary/selected colors
private SolidBrush reportsForegroundBrushSelected = new SolidBrush(Color.White);
private SolidBrush reportsForegroundBrush = new SolidBrush(Color.Black);
private SolidBrush reportsBackgroundBrushSelected = new SolidBrush(Color.FromKnownColor(KnownColor.Highlight));
private SolidBrush reportsBackgroundBrush1 = new SolidBrush(Color.White);
private SolidBrush reportsBackgroundBrush2 = new SolidBrush(Color.Gray);
//custom method to draw the items, don't forget to set DrawMode of the ListBox to OwnerDrawFixed
private void lbReports_DrawItem(object sender, DrawItemEventArgs e)
{
e.DrawBackground();
bool selected = ((e.State & DrawItemState.Selected) == DrawItemState.Selected);
int index = e.Index;
if (index >= 0 && index < lbReports.Items.Count)
{
string text = lbReports.Items[index].ToString();
Graphics g = e.Graphics;
//background:
SolidBrush backgroundBrush;
if (selected)
backgroundBrush = reportsBackgroundBrushSelected;
else if ((index % 2) == 0)
backgroundBrush = reportsBackgroundBrush1;
else
backgroundBrush = reportsBackgroundBrush2;
g.FillRectangle(backgroundBrush, e.Bounds);
//text:
SolidBrush foregroundBrush = (selected) ? reportsForegroundBrushSelected : reportsForegroundBrush;
g.DrawString(text, e.Font, foregroundBrush, lbReports.GetItemRectangle(index).Location);
}
e.DrawFocusRectangle();
}
Powyższe dodaje do podanego kodu i wyświetli właściwy tekst oraz podświetli wybrany element.
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2017-05-23 12:17:55
// Set the background to a predefined colour
MyListBox.BackColor = Color.Red;
// OR: Set parts of a color.
MyListBox.BackColor.R = 255;
MyListBox.BackColor.G = 0;
MyListBox.BackColor.B = 0;
Jeśli przez ustawienie wielu kolorów tła rozumiesz ustawienie innego koloru tła dla każdego elementu, nie jest to możliwe w przypadku ListBox, ale w przypadku ListView, z czymś takim jak:
// Set the background of the first item in the list
MyListView.Items[0].BackColor = Color.Red;
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2008-09-18 11:31:08
public Picker()
{
InitializeComponent();
this.listBox.DrawMode = DrawMode.OwnerDrawVariable;
this.listBox.MeasureItem += listBoxMetals_MeasureItem;
this.listBox.DrawItem += listBoxMetals_DrawItem;
}
void listBoxMetals_DrawItem(object sender, DrawItemEventArgs e)
{
e.DrawBackground();
Brush myBrush = Brushes.Black;
var item = listBox.Items[e.Index] as Mapping;
if (e.Index % 2 == 0)
{
e.Graphics.FillRectangle(new SolidBrush(Color.GhostWhite), e.Bounds);
}
e.Graphics.DrawString(item.Name,
e.Font, myBrush, e.Bounds, StringFormat.GenericDefault);
e.DrawFocusRectangle();
}
Pełna Próbka
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2014-07-09 06:55:56
private void listbox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
e.DrawBackground();
Brush myBrush = Brushes.Black;
var item = listbox1.Items[e.Index];
if(e.Index % 2 == 0)
{
e.Graphics.FillRectangle(new SolidBrush(Color.Gold), e.Bounds);
}
e.Graphics.DrawString(((ListBox)sender).Items[e.Index].ToString(),
e.Font, myBrush,e.Bounds,StringFormat.GenericDefault);
e.DrawFocusRectangle();
}
public MainForm()
{
InitializeComponent();
this.listbox1.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.listbox1_DrawItem);
}
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2017-01-13 09:44:38