带进度条的ListView

带进度条的ListView

(2013-01-21 21:28:57)

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分类： C#

对于已经有的组件，可以直接添加进来，添加后要先运行一下，然后会在工具箱内找到相应控件。

 

1、首先编写组件，然后将组件添加到工具箱内

 

 

编写代码如下：

    public partial class ListViewEx : System.Windows.Forms.ListView
    {
        public ListViewEx()
        {
            InitializeComponent();
        }

        //C# listview进度条显示
        private Color mProgressColor = Color.Red;
        public Color ProgressColor
        {
            get
            {
                return this.mProgressColor;
            }
            set
            {
                this.mProgressColor = value;
            }
        }
        private Color mProgressTextColor = Color.Black;
        public Color ProgressTextColor
        {
            get
            {
                return mProgressTextColor;
            }
            set
            {
                mProgressTextColor = value;
            }
        }
        public int ProgressColumIndex
        {
            set
            {
                progressIndex = value;
            }
            get
            {
                return progressIndex;
            }
        }
        int progressIndex = -1;
        const string numberstring = "0123456789.";
        private bool CheckIsFloat(String s)
        {
            //C# listview进度条显示
            foreach (char c in s)
            {
                if (numberstring.IndexOf(c) > -1)
                { continue; }
                else return false;
            }
            return true;
        }
        protected override void Dispose(bool disposing)
        {
            base.Dispose(disposing);
        }
        //C# listview进度条显示
        private void InitializeComponent()
        {
            this.OwnerDraw = true;
            this.View = View.Details;
        }
        protected override void OnDrawColumnHeader(DrawListViewColumnHeaderEventArgs e)
        {

            e.DrawDefault = true;
            base.OnDrawColumnHeader(e);

        }
        protected override void OnDrawSubItem(DrawListViewSubItemEventArgs e)
        {

            if (e.ColumnIndex != this.progressIndex)
            {
                e.DrawDefault = true; base.OnDrawSubItem(e);
            }
            else
            {

                if (CheckIsFloat(e.Item.SubItems[e.ColumnIndex].Text))
                //判断当前subitem文本是否可以转为浮点数
                {
                    float per = float.Parse(e.Item.SubItems[e.ColumnIndex].Text);
                    if (per >= 1.0f) { per = per / 100.0f; }
                    Rectangle rect = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Width, e.Bounds.Height);
                    DrawProgress(rect, per, e.Graphics);
                }
            }
        }
        //C# listview进度条显示 ///绘制进度条列的subitem 
        private void DrawProgress(Rectangle rect, float percent, Graphics g)
        {

            if (rect.Height > 2 && rect.Width > 2)
            {
                if ((rect.Top > 0 && rect.Top < this.Height) && (rect.Left > this.Left && rect.Left < this.Width))
                {
                    //绘制进度  
                    int width = (int)(rect.Width * percent);
                    Rectangle newRect = new Rectangle(rect.Left + 1, rect.Top + 1, width - 2, rect.Height - 2);
                    using (Brush tmpb = new SolidBrush(this.mProgressColor))
                    { g.FillRectangle(tmpb, newRect); }
                    newRect = new Rectangle(rect.Left + 1, rect.Top + 1, rect.Width - 2, rect.Height - 2);
                    g.DrawRectangle(Pens.RoyalBlue, newRect);
                    StringFormat sf = new StringFormat();
                    sf.Alignment = StringAlignment.Center;
                    sf.LineAlignment = StringAlignment.Center;
                    sf.Trimming = StringTrimming.EllipsisCharacter;
                    newRect = new Rectangle(rect.Left + 1, rect.Top + 1, rect.Width - 2, rect.Height - 2);
                    using (Brush b = new SolidBrush(mProgressTextColor))
                    {
                        g.DrawString(percent.ToString("p1"), this.Font, b, newRect, sf);

                    }
                }
            }
            //C# listview进度条显示
            else
            {

                return;

            }
        } 

    }

 

2、调用方法：

        private void Form1_Load(object sender, EventArgs e)
        {
            ListViewItem lviUserName = new ListViewItem();
            ListViewItem.ListViewSubItem lvsinc = new ListViewItem.ListViewSubItem();
            ListViewItem.ListViewSubItem lvsihostname = new ListViewItem.ListViewSubItem();
            ListViewItem.ListViewSubItem lvsiip = new ListViewItem.ListViewSubItem();
            lviUserName.Text = "5";
            lvsinc.Text = "4";
            lvsihostname.Text = "3";
            lvsiip.Text = "100";

            lviUserName.SubItems.Add(lvsinc);
            lviUserName.SubItems.Add(lvsihostname);
            lviUserName.SubItems.Add(lvsiip);
            this.listView1.Items.Add(lviUserName);

            this.listView1.ProgressTextColor = Color.Red;
            this.listView1.ProgressColor = Color.YellowGreen;
        }

        private void listView1_DrawSubItem(object sender, DrawListViewSubItemEventArgs e)
        {
            //设置进度条的ColunIndex
            this.listView1.ProgressColumIndex = 1;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (Convert.ToInt32(listView1.Items[0].SubItems[1].Text.ToString()) <= 100)
            {
                //进度条数字更新
                listView1.Items[0].SubItems[1].Text = (Convert.ToInt32(listView1.Items[0].SubItems[1].Text.ToString()) + 1).ToString();
            }
        }

 

3、注意要添加Timer控件

相应属性设置如下：

 

4、运行结果如下所示