如何更改ListBox选择背景颜色？

Question

它似乎使用默认的蓝色默认颜色从Windows设置。 假设我想将其永久改为红色。我正在使用Winforms。

在此先感谢。

Answer 1

您必须重写Drawitem事件并设置DrawMode属性为DrawMode.OwnerDrawFixed

检查该样本

private void listBox1_DrawItem(object sender, DrawItemEventArgs e) 
{ 
    if (e.Index<0) return; 
    //if the item state is selected them change the back color 
    if ((e.State & DrawItemState.Selected) == DrawItemState.Selected) 
     e = new DrawItemEventArgs(e.Graphics, 
            e.Font, 
            e.Bounds, 
            e.Index, 
            e.State^DrawItemState.Selected, 
            e.ForeColor, 
            Color.Yellow);//Choose the color 

    // Draw the background of the ListBox control for each item. 
    e.DrawBackground(); 
    // Draw the current item text 
    e.Graphics.DrawString(listBox1.Items[e.Index].ToString(),e.Font, Brushes.Black, e.Bounds, StringFormat.GenericDefault); 
    // If the ListBox has focus, draw a focus rectangle around the selected item. 
    e.DrawFocusRectangle(); 
} 

Answer 2

下面的代码确实你说的到底是什么：

在InitializeComponent方法：

this.listBox1.DrawMode = DrawMode.OwnerDrawFixed; 
this.listBox1.DrawItem += new System.Windows.Forms.DrawItemEventHandler(listBox1_DrawItem); 
this.listBox1.SelectedIndexChanged += new System.EventHandler(listBox1_SelectedIndexChanged); 

且事件处理程序：

：

void listBox1_SelectedIndexChanged(object sender, System.EventArgs e) 
{ 
    this.listBox1.Invalidate(); 
} 

void listBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e) 
{ 
    int index = e.Index; 
    Graphics g = e.Graphics; 
    foreach (int selectedIndex in this.listBox1.SelectedIndices) 
    { 
     if (index == selectedIndex) 
     { 
      // Draw the new background colour 
      e.DrawBackground(); 
      g.FillRectangle(new SolidBrush(Color.Red), e.Bounds); 
     } 
    } 

    // Get the item details 
    Font font = listBox1.Font; 
    Color colour = listBox1.ForeColor; 
    string text = listBox1.Items[index].ToString(); 

    // Print the text 
    g.DrawString(text, font, new SolidBrush(Color.Black), (float)e.Bounds.X, (float)e.Bounds.Y); 
    e.DrawFocusRectangle(); 
} 

代码摘自

http://www.weask.us/entry/change-listbox-rsquo-selected-item-backcolor-net

Answer 3

希望这会帮助别人，未来随着上面的代码帮我，但不是100％

我仍然遇到以下问题：
- 当我选择另一个索引时，新选择的索引也会突出显示红色。
- 当我改变列表框的字体大小时，突出显示的区域会变小。

下面修复这个问题

• 改变DrawMode到ownerdrawvariable
• 创建MeasurItem和DRAWITEM事件列表框

private void lstCartOutput_MeasureItem(object sender, MeasureItemEventArgs e) 
{ 
    // Cast the sender object back to ListBox type. 
    ListBox listBox = (ListBox)sender; 
    e.ItemHeight = listBox.Font.Height; 
} 

private void lstCartOutput_DrawItem(object sender, DrawItemEventArgs e) 
{ 
    ListBox listBox = (ListBox)sender; 
    e.DrawBackground(); 
    Brush myBrush = Brushes.Black; 

    if ((e.State & DrawItemState.Selected) == DrawItemState.Selected) 
    { 
     myBrush = Brushes.Red; 
     e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(0, 64, 64)), e.Bounds); 
    } 

    else 
    { 
     e.Graphics.FillRectangle(Brushes.White, e.Bounds); 

    } 

    e.Graphics.DrawString(listBox.Items[e.Index].ToString(),e.Font, myBrush, e.Bounds); 
    e.DrawFocusRectangle(); 
} 

我还引用了MSDN网站。

Answer 4

我有同样的问题。

不幸的是我的数据源是一个实体类的列表。所以，我有以上，但有细微的修改接受的答案相同的代码来选择我的班，我需要上的DrawString我的列表框的确切性质：

if (e.Index < 0) return; 
     if ((e.State & DrawItemState.Selected) == DrawItemState.Selected) 
      e = new DrawItemEventArgs(e.Graphics, 
             e.Font, 
             e.Bounds, 
             e.Index, 
             e.State^DrawItemState.Selected, 
             e.ForeColor, 
             Color.Yellow); 

    e.DrawBackground(); 
    //This is my modification below: 
    e.Graphics.DrawString(ctListViewProcess.Items.Cast<entMyEntity>().Select(c => c.strPropertyName).ElementAt(e.Index), e.Font, Brushes.Black, e.Bounds, StringFormat.GenericDefault); 
    e.DrawFocusRectangle();