鉴于大家对ASP.net十分关注，我们编辑小组在此为大家搜集整理了“进度条控件”一文，供大家参考学习
因为比较简单，也没有多少技术含量，就把它帖出来，希望给别的朋友一点帮助 这个进度条控件，除了具有普通进度条的功能以外，还具有如下功能：设置进度条的背景色和前景色设置进度条的外观方式（3D，single，none）是否自动显示当前进度比例（比如在进度条的中间显示当前进度58%）当然，这个功能还可以增加很多，比如背景色和前景色也可以用图片代替，还有其它的功能打算在以后有时间时再添加，这次就写这些了。代码如下：using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D ;
using System.Data;
using System.Windows.Forms;
namespace XiaoPang.Windows
{
/// <summary>
/// GProgressBar 的摘要说明。
/// </summary>
public class GProgressBar : System.Windows.Forms.UserControl
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public GProgressBar()
{
// 该调用是 Windows.Forms 窗体设计器所必需的。
InitializeComponent();
base.Height = 23 ;
this.Resize+=new EventHandler(GProgressBar_Resize);
this.LocationChanged+=new EventHandler(GProgressBar_Resize);
}
private void GProgressBar_Resize(object sender,System.EventArgs e)
{
base.Refresh() ;
}
private int mMax =100;
[Browsable(true), Description("最大值"), Category("XiaoPang")]
public int Max
{
get
{
return mMax ;
}
set
{
mMax = value > 0?value:1;
}
}
[Browsable(true), Description("大小"), Category("XiaoPang")]
public new Size Size
{
get
{
return base.Size ;
}
set
{
base.Size = value ;
}
}
private int mMin =0;
[Browsable(true), Description("最小值"), Category("XiaoPang")]
public int Min
{
get
{
return mMin ;
}
set
{
mMin = value ;
}
}
private int mStep = 1 ;
[Browsable(true), Description("步长"), Category("XiaoPang")]
public int Step
{
get
{
return mStep ;
}
set
{
mStep = value ;
}
}
[Browsable(true), Description("背景色"), Category("XiaoPang")]
public override Color BackColor
{
get
{
return base.BackColor ;
}
set
{
base.BackColor = value ;
}
}
[Browsable(true), Description("前景色"), Category("XiaoPang")]
public override Color ForeColor
{
get
{
return base.ForeColor ;
}
set
{
base.ForeColor = value ;
}
}
private bool mRate = false;
[Browsable(true), Description("是否显示比例数字"), Category("XiaoPang")]
public bool Rate
{
get
{
return mRate ;
}
set
{
mRate = value ;
}
}
private int mValue = 0 ;
[Browsable(true), Description("当前值"), Category("XiaoPang")]
public int Value
{
get
{
return mValue ;
}
set
{
if (value <= this.Max)
mValue = value ;
else
mValue = this.Max ;
this.Refresh() ;
}
}
private BorderStyle mBorderStyle = BorderStyle.Fixed3D ;
[DefaultValue(0), Category("XiaoPang"),Description("外观")]
public BorderStyle BorderStyle
{
get
{
return this.mBorderStyle;
}
set
{
if (this.mBorderStyle != value)
{
this.mBorderStyle = value;
this.Refresh() ;
}
}
}
public void PerformStep()
{
Value++ ;
}
private void DrawProgress(Graphics g,Rectangle rect)
{
int iWidth = (Value*rect.Width)/Max ;
Rectangle DrawRect = new Rectangle(rect.X,rect.Y,iWidth,rect.Height) ;
SolidBrush front = new SolidBrush(this.ForeColor) ;
g.FillRectangle(front,DrawRect);
if (Rate)
{
int iRate = Value*100/Max ;
string strText = iRate.ToString() + "%" ;
int iTextWidth = (int)g.MeasureString(strText,this.Font).Width ;
int iStart = rect.Left + (rect.Width - iTextWidth)/2 ;
Point posS = new Point(iStart -10,rect.Top) ;
Point posE = new Point(iStart + iTextWidth + 10,rect.Bottom) ;
LinearGradientBrush textbrush = new LinearGradientBrush(posS,posE,this.BackColor,this.ForeColor) ;
g.DrawString(strText,this.Font,textbrush,iStart ,rect.Top+5) ;
}
}
protected override void OnPaintBackground(PaintEventArgs pevent)
{
SolidBrush back = new SolidBrush(this.BackColor) ;
pevent.Graphics.FillRectangle(back,pevent.ClipRectangle);
}
protected override void OnPaint(PaintEventArgs e)
{
if (!this.DesignMode)
DrawProgress(e.Graphics,e.ClipRectangle) ;
switch(BorderStyle)
{
case BorderStyle.None:
break ;
case BorderStyle.FixedSingle:
System.Windows.Forms.ControlPaint.DrawBorder3D(e.Graphics,e.ClipRectangle,Border3DStyle.Flat) ;
break ;
case BorderStyle.Fixed3D:
System.Windows.Forms.ControlPaint.DrawBorder3D(e.Graphics,e.ClipRectangle,Border3DStyle.Sunken) ;
break ;
}
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region 组件设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器
/// 修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
//
// GProgressBar
//
this.Name = "GProgressBar";
this.Size = new System.Drawing.Size(150, 24);
}
#endregion
}
}
