Question

C# winform中ListBox各项之间没有分割线？（VS2013）

请问如何才能使其出现分割线

Answer 1

listBox1.DrawMode = DrawMode.OwnerDrawFixed;
首先将DrawMode为DrawMode.OwnerDrawFixed 或 DrawMode.OwnerDrawVariable 时，才触发该事件(DrawItem事件)
//在构造函数中写上触发的事件：
this.listBox1.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.listBox1_DrawItem);

private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
{
Brush myBrush = Brushes.Black;

if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
{
myBrush = new SolidBrush(Color.FromArgb(0, 0, 255));//选中时背景颜色
}
else//没有选中时的背景颜色
{
myBrush = new SolidBrush(Color.White);
}
e.Graphics.FillRectangle(myBrush, e.Bounds);//填满矩形背景颜色
e.Graphics.DrawRectangle(new Pen(new SolidBrush(e.ForeColor)), e.Bounds);
e.DrawFocusRectangle();//焦点框

StringFormat stringformat = StringFormat.GenericDefault;
stringformat.LineAlignment = StringAlignment.Center;

e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), e.Font, new SolidBrush(e.ForeColor), e.Bounds, stringformat);
}

Answer 2

重绘 ListItem样式

追问

有代码吗？