带有进度条的listView代码,C#代码库,德仔网

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代码分类
【C#】带有进度条的listView
作者:Calvin / 发布于2016/2/1/ 590
使用方法，数据加载后，设置progressColumnIndex 属性即可
public class ListViewProgress : System.Windows.Forms.ListView
    {
        private string progressText;

        private System.Drawing.Color progressBackColor;

        public System.Drawing.Color ProgressBackColor
        {
            get { return progressBackColor; }
            set { progressBackColor = value; }
        }
        private System.Drawing.Color progressTextColor;

        public System.Drawing.Color ProgressTextColor
        {
            get { return progressTextColor; }
            set { progressTextColor = value; }
        }
        private int progressColumnIndex = -1;

        public int ProgressColumnIndex
        {
            get { return progressColumnIndex; }
            set { progressColumnIndex = value; }
        }

        public  ListViewProgress()
        {
            this.Name = "ProgressListView";
            this.progressBackColor = System.Drawing.Color.YellowGreen;
            this.progressTextColor = base.ForeColor;
            this.OwnerDraw = true;
        }

        protected override void OnDrawColumnHeader(System.Windows.Forms.DrawListViewColumnHeaderEventArgs e)
        {
            e.DrawDefault = true;
            base.OnDrawColumnHeader(e);
        }

        protected override void OnDrawSubItem(System.Windows.Forms.DrawListViewSubItemEventArgs e)
        {
            if (e.ColumnIndex == this.ProgressColumnIndex)
            {
                //画进度条
                System.Drawing.Graphics ProgressGraphics = e.Graphics;
                System.Drawing.Rectangle ProgressRect = new System.Drawing.Rectangle(
                    e.Bounds.Left, e.Bounds.Top, e.Bounds.Width, e.Bounds.Height);

                if (ProgressRect.Height > 6 && ProgressRect.Width > 6)
                {
                    //调整为新的区域，以便产生一定间距
                    ProgressRect = new System.Drawing.
                        Rectangle(e.Bounds.Left + 2, e.Bounds.Top + 2, e.Bounds.Width - 5, e.Bounds.Height - 5);
                    Single Percent = 0;
                    try
                    {
                        Percent = Convert.ToSingle(e.SubItem.Text);
                    }
                    catch
                    {
                        Percent = 0;
                    }
                    if (Percent > 1.0f)
                        Percent = Percent / 100.0f;
                    //外框
                    ProgressGraphics.FillRectangle(System.Drawing.Brushes.White, ProgressRect);
                    ProgressGraphics.DrawRectangle(new System.Drawing.Pen(e.SubItem.ForeColor), ProgressRect);

                    //内容
                    System.Drawing.Rectangle ProgressContentRect = new Rectangle(
                        ProgressRect.Left + 1, ProgressRect.Top + 1, (int)(ProgressRect.Width * Percent) - 1, ProgressRect.Height - 1 );
                    ProgressGraphics.FillRectangle(new System.Drawing.SolidBrush(progressBackColor), ProgressContentRect);
                    //输出文字
                    if (e.SubItem.Font.Height < ProgressRect.Height)
                    {
                        ProgressRect = new System.Drawing.Rectangle(ProgressRect.Left, ProgressRect.Top
                            - ((ProgressRect.Height - e.SubItem.Font.Height) / 2), ProgressRect.Width, ProgressRect.Height);
                    }
                    else
                    {
                        ProgressRect = new System.Drawing.Rectangle(e.Bounds.Left, e.Bounds.Top, e.Bounds.Width, e.Bounds.Height);
                    }
                    using (StringFormat sf = new StringFormat())
                    {
                        sf.Alignment = System.Drawing.StringAlignment.Center;
                        sf.LineAlignment = System.Drawing.StringAlignment.Center;
                        sf.Trimming = System.Drawing.StringTrimming.EllipsisCharacter;

                        e.Graphics.DrawString(Percent.ToString("p1"), e.SubItem.Font,
                            new System.Drawing.SolidBrush(this.progressTextColor), ProgressRect, sf);
                    }
                }
                base.OnDrawSubItem(e);
            }
            else
            {
                e.DrawDefault = true;
                base.OnDrawSubItem(e);
            }
        }
    }
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