C# listview进度条如何显示

这篇文章主要讲解了"C# listview进度条如何显示"，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习"C# listview进度条如何显示"吧！

看看具体的实现过程。

程序比较简单,就是重载了listview的实现,不过很实用!

using System;   using System.Collections.Generic;   using System.Text;   using System.Windows.Forms;   using System.Drawing;   //C# listview进度条显示namespace WindowsApplication1   {   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;   }   }   //C# listview进度条显示public int ProgressColumIndex   {   set  {   progressIndex = value;   }   get  {   return progressIndex;   }   }   int progressIndex = -1;    /// ﹤summary﹥   /// 检查是否可以转化为一个浮点数   /// ﹤/summary﹥   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)   {   //C# listview进度条显示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;   }   }   }   }

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