ListView drawsubitem - 未选择列

Question

为什么没有选择第 4 列？我使用 listView3_DrawSubItem 和 e.DrawDefault = true；对于该列，现在不可选择。

编辑： listView1_DrawSubItem代码：

        // Only interested in 2nd column.
        if (e.Header != this.action)
        {
            e.DrawDefault = true;
            return;
        }
        drawItem(e);

以及绘图项目代码：

        string drawString = e.SubItem.Text;
        float size = 8.25F;

        e.DrawBackground();

        Bitmap image = new Bitmap(DesktopCleaner.Properties.Resources.folder_icon_512x512);

        if (drawString == "Leave on Desktop")
        {
            image = new Bitmap(DesktopCleaner.Properties.Resources.desk);

        }
        else if (drawString == "Recycle")
        {
            image = new Bitmap(DesktopCleaner.Properties.Resources.recyclebin_preview_1);

        }
        else if (drawString == "Delete")
        {
            image = new Bitmap(DesktopCleaner.Properties.Resources.free_vector_delete_icon_101805_Delete_icon);

        }

        var imageRect = new Rectangle(e.Bounds.X + 3, e.Bounds.Y, image.Width - 2, image.Height - 2);
        e.Graphics.DrawImage(image, imageRect);

        System.Drawing.Font drawFont = new System.Drawing.Font(listView1.Font.FontFamily, size, FontStyle.Bold);
        System.Drawing.SolidBrush drawBrush = new System.Drawing.SolidBrush(System.Drawing.Color.Black);

        System.Drawing.StringFormat drawFormat = new System.Drawing.StringFormat();
        var strrect = new Rectangle(e.Bounds.X + 18, e.Bounds.Y + 3, 150, e.Bounds.Height);
        e.Graphics.DrawString(drawString, drawFont, drawBrush, strrect, drawFormat);

Answer 1

您负责绘制选区。

所以即使你使用好的方法:

e.DrawBackground();
e.DrawText();

未绘制任何选择。

所以你需要使用 FillRectangle 和 DrawString 以及适当的 Colors，可能像这样：

 bool selected = e.Item.Selected;
 using ( SolidBrush backBrush = new SolidBrush( 
         selected? SystemColors.MenuHighlight :SystemColors.Window ) )
    e.Graphics.FillRectangle(backBrush, e.Bounds);
 using (SolidBrush textBrush = new SolidBrush(
         selected ? Color.White : Color.Black        ))
    e.Graphics.DrawString(e.Item.Text, yourFont, textBrush, e.Bounds.X, e.Bounds.Y);

代码精简；您将使用坐标为图标等腾出空间。

ListView drawsubitem - 未选择列

ListView drawsubitem - column is not selected

c#

winforms

listview