C#中怎么实现在combobox显示图标

Question

如题
哪位大侠指点指点！！

Answer 1

列表框COMbobox没有backimag属性.添加图片难道需要自己写方法吗?

Answer 2

无论是下拉还是选中,都需要重新绘制,也就是就combobox本身及图象,都是重新绘制上去的.

Answer 3

this.comboBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed; private void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
        {
            e.Graphics.DrawImage(this.imageList1.Images[e.Index], e.Bounds.X, e.Bounds.Y, 32, e.Bounds.Height);
            if (e.State == DrawItemState.Selected)
            {
                Pen p = new Pen(Color.White);
                Pen b=new Pen(SystemColors.Highlight);
                e.Graphics.FillRectangle(b.Brush, e.Bounds.X + 32, e.Bounds.Y, e.Bounds.Width - 32, e.Bounds.Height);
                e.Graphics.DrawString(this.comboBox1.Items[e.Index].ToString(), this.Font, p.Brush, e.Bounds.X + 35, e.Bounds.Y);
                      }
            else
            {
               
                Pen p = new Pen(Color.Black);
                Pen b = new Pen(Color.White);
                e.Graphics.FillRectangle(b.Brush, e.Bounds.X + 32, e.Bounds.Y, e.Bounds.Width - 32, e.Bounds.Height);
                e.Graphics.DrawString(this.comboBox1.Items[e.Index].ToString(), this.Font, p.Brush, e.Bounds.X + 35, e.Bounds.Y);
            }
        }

Answer 4

首先在窗体中添加一个comboBox1和一个imageList(本例中带有三个图片)
private void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
        {
            Graphics g = e.Graphics;
            Rectangle r = e.Bounds;
            Size imageSize = imageList1.ImageSize;
       
            if (e.Index >= 0)
            {
                Font fn = new Font("Tahoma", 10, FontStyle.Bold);
                string s = (string)comboBox1.Items[e.Index];
                StringFormat sf = new StringFormat();
                sf.Alignment = StringAlignment.Near;
                if (e.State == (DrawItemState.NoAccelerator | DrawItemState.NoFocusRect))
                {
                    //画条目背景 
                    e.Graphics.FillRectangle(new SolidBrush(Color.Red), r);
                    //绘制图像 
                    imageList1.Draw(e.Graphics, r.Left, r.Top, e.Index);
                    //显示字符串 
                    e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black), r.Left + imageSize.Width, r.Top);
                    //显示取得焦点时的虚线框 
                    e.DrawFocusRectangle();
                }
                else
                {
                    e.Graphics.FillRectangle(new SolidBrush(Color.LightBlue), r);
                    imageList1.Draw(e.Graphics, r.Left, r.Top, e.Index);
                    e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black), r.Left + imageSize.Width, r.Top);
                    e.DrawFocusRectangle();
                }
            }        }        private void Form1_Load(object sender, EventArgs e)
        {
            comboBox1.DrawMode = DrawMode.OwnerDrawFixed;
            comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
            comboBox1.Items.Add("小车");
            comboBox1.Items.Add("视频");
            comboBox1.Items.Add("信号灯"); 
 
        }

Answer 5

首先在窗体中添加一个comboBox1和一个imageList(本例中带有三个图片) 
private void comboBox1_DrawItem(object sender, DrawItemEventArgs e) 
        { 
            Graphics g = e.Graphics; 
            Rectangle r = e.Bounds; 
            Size imageSize = imageList1.ImageSize; 
      
            if (e.Index >= 0) 
            { 
                Font fn = new Font("Tahoma", 10, FontStyle.Bold); 
                string s = (string)comboBox1.Items[e.Index]; 
                StringFormat sf = new StringFormat(); 
                sf.Alignment = StringAlignment.Near; 
                if (e.State == (DrawItemState.NoAccelerator ¦ DrawItemState.NoFocusRect)) 
                { 
                    //画条目背景 
                    e.Graphics.FillRectangle(new SolidBrush(Color.Red), r); 
                    //绘制图像 
                    imageList1.Draw(e.Graphics, r.Left, r.Top, e.Index); 
                    //显示字符串 
                    e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black), r.Left + imageSize.Width, r.Top); 
                    //显示取得焦点时的虚线框 
                    e.DrawFocusRectangle(); 
                } 
                else 
                { 
                    e.Graphics.FillRectangle(new SolidBrush(Color.LightBlue), r); 
                    imageList1.Draw(e.Graphics, r.Left, r.Top, e.Index); 
                    e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black), r.Left + imageSize.Width, r.Top); 
                    e.DrawFocusRectangle(); 
                } 
            }         }         private void Form1_Load(object sender, EventArgs e) 
        { 
            comboBox1.DrawMode = DrawMode.OwnerDrawFixed; 
            comboBox1.DropDownStyle = ComboBoxStyle.DropDownList; 
            comboBox1.Items.Add("小车"); 
            comboBox1.Items.Add("视频"); 
            comboBox1.Items.Add("信号灯");         } 

Answer 6

没有吧 vs2005开始combox本身就支持显示图片的