先设置listBoxMsg.DrawMode = DrawMode.OwnerDrawFixed;
private void listBoxMsg_DrawItem(object sender, DrawItemEventArgs e) {
ListBox lb= (ListBox)sender;
string s = lb.Items[e.Index].ToString();
if (s.Length * 15 > this.Width)
this.Width = s.Length * 15;
Brush myBrush = Brushes.Black;
Image image=null;//绘制图标
if (s.Contains("。"))
{
image = Image.FromFile(ResourceObj.DirectoryCurrent + "\\PIC\\Default\\error.png");
}
else
{
image = Image.FromFile(ResourceObj.DirectoryCurrent + "\\PIC\\Default\\excla.png");
}
//e.Graphics.FillRectangle(myBrush, e.Bounds);
//e.DrawFocusRectangle();//焦点框
Graphics g = e.Graphics;
Rectangle bounds = e.Bounds;
Rectangle imageRect = new Rectangle( bounds.X, bounds.Y-2, bounds.Height-4, bounds.Height-4);
Rectangle textRect = new Rectangle( imageRect.Right, bounds.Y, bounds.Width - imageRect.Right, bounds.Height);
if (image != null)
{
g.DrawImage(image, imageRect, 0, 0,image.Width,image.Height, GraphicsUnit.Pixel);
}
//文本
StringFormat strFormat = new StringFormat();
strFormat.LineAlignment = StringAlignment.Near;
e.Graphics.DrawString(listBoxMsg.Items[e.Index].ToString(), e.Font, new SolidBrush(Color.FromArgb(0, 0, 0)), textRect, strFormat);
}