[C#]WinForm 變換ComboBox下拉項目顏色
設定ComboBox.DrawMode 即可觸發ComboBox 的DrawItem事件
DrawMode是列舉值有三種模式：
- Normal (預設值)
-
OwnerDrawFixed
- 手動繪製項目，項目高度與寬度都相同
-
OwnerDrawnVariable
- 手動繪製項目，項目高度與寬度可觸發MeasureItem事件定義
public void Form_Load()
{
ComboBox.DrawMode = DrawMode.OwnerDrawFixed;
}
private void ComboBoxDropDown_DrawItem(object sender, DrawItemEventArgs e)
{
ComboBox cBox = (ComboBox)sender;
e.DrawBackground();
foreach (var item in cBox .Items)
{
e.Graphics.DrawString(item.DisplayName, e.Font, new SolidBrush(Color.Gray), (Rectangle)e.Bounds);
e.DrawFocusRectangle();
}
}
選擇項目後，控制項欄位也要跟著變顏色
private void ComboBoxDropDownClosed(object sender, EventArgs e)
{
ComboBox cb = (ComboBox)sender;
Object selectItem = cb.SelectedItem as Object ;
foreach (Object item in cb .Items)
{
if (selectItem == item)
{
pComboBox.ForeColor = Color.Gray;
}
else
{
pComboBox.ForeColor = Color.Black;
}
}
}
新手發文請多多指教 ^_____^