I am trying to change the background color of some rows in a ListBox
. I have two lists that one has names and is displayed in a ListBox
. The second list has some similar values as the first List
. When clicking a button, I want to search the ListBox
and the second List
, and change the color of the ListBox
for those values that appear in the List
. My search in the ListBox
is as follows:
for (int i = 0; i < listBox1.Items.Count; i++) { for (int j = 0; j < students.Count; j++) { if (listBox1.Items[i].ToString().Contains(students[j].ToString())) { } } }
But I don't know which method to use in order to change the appearance of a ListBox
row. Can anybody help me?
**EDIT: **
HI I wrote my code as follows:
private void ListBox1_DrawItem(object sender, DrawItemEventArgs e) { 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); for (int i = 0; i < listBox1.Items.Count; i++) { for (int j = 0; j < existingStudents.Count; j++) { if (listBox1.Items[i].ToString().Contains(existingStudents[j])) { e.Graphics.DrawString(listBox1.Items[i].ToString(), e.Font, myBrush2, e.Bounds, StringFormat.GenericDefault); } } } e.DrawFocusRectangle(); }
Now it draws my List
in the ListBox
, but when I click the button first, it shows in red only the students that are in the List
and when I click on the ListBox
it draws all the elements. I want that it will show all the elements , and when I click the button it will show all the elements and the element found in the List
in red. Where is my mistake?
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I find solution that instead of using ListBox I used ListView.It allows to change list items BackColor.
private void listView1_Refresh() { for (int i = 0; i < listView1.Items.Count; i++) { listView1.Items[i].BackColor = Color.Red; for (int j = 0; j < existingStudents.Count; j++) { if (listView1.Items[i].ToString().Contains(existingStudents[j])) { listView1.Items[i].BackColor = Color.Green; } } } }
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