给ListBox每项加图标

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);

}