ListView 图标显示在subitem中

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#listview #image #imagelist #object

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本文介绍如何在ListView的子项中绘制图标，包括设置imageList控件、启用OwnerDraw属性及在DrawSubItem事件中根据不同的列索引和文本值绘制对应的图标。

ListView 图标显示在subitem中

2009-12-22 10:16:28

1. 把需要用的图片存入imageList控件中。

2. 设置listview的OwnerDraw属性：true。

3. 在listview的DrawColumnHeader事件中写如下代码

private void listView1_DrawColumnHeader(object sender, DrawListViewColumnHeaderEventArgs e) { e.DrawDefault = true; // 由操作系统绘制此标题。 }

4. 在listview的DrawSubItem事件中绘制图片

private void listView1_DrawSubItem(object sender, DrawListViewSubItemEventArgs e) { Image tmp_image = this.imageList1.Images[0]; //声明Image实例，用来指定后面要画的那个图标 Rectangle rect = new Rectangle(); //指明画的矩形对象 if (e.ColumnIndex == 1) //在第几列画 { switch (e.SubItem.Text) { case "2": tmp_image = this.imageList1.Images[0]; break; } rect.X = e.Bounds.X; rect.Y += e.Bounds.Y; rect.Width = tmp_image.Width; rect.Height = e.Bounds.Height; e.Graphics.DrawImage(tmp_image, rect); } else if (e.ColumnIndex == 2) { switch (e.SubItem.Text) { case "3": tmp_image = this.imageList1.Images[1]; break; } rect.X = e.Bounds.X; rect.Y += e.Bounds.Y; rect.Width = tmp_image.Width; rect.Height = e.Bounds.Height; e.Graphics.DrawImage(tmp_image, rect); } else if (e.ColumnIndex == 3) { switch (e.SubItem.Text) { case "4": tmp_image = this.imageList1.Images[2]; break; } rect.X = e.Bounds.X; rect.Y += e.Bounds.Y; rect.Width = tmp_image.Width; rect.Height = e.Bounds.Height; e.Graphics.DrawImage(tmp_image, rect); } else if (e.ColumnIndex == 4) { switch (e.SubItem.Text) { case "1": tmp_image = this.imageList1.Images[0]; break; case "2": tmp_image = this.imageList1.Images[1]; break; case "5": tmp_image = this.imageList1.Images[2]; break; case "不等于": tmp_image = this.imageList1.Images[3]; break; } rect.X = e.Bounds.X; rect.Y += e.Bounds.Y; rect.Width = tmp_image.Width; rect.Height = e.Bounds.Height; e.Graphics.DrawImage(tmp_image, rect); } else { e.DrawDefault = true; } }