using System;
using System.Drawing;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
namespace Blood.Com.WebControl
{
///
/// 进度条WEB控件
///
[DefaultProperty("Text"),
ToolboxData("<{0}:ProgressBar runat=server>")]
public class ProgressBar : System.Web.UI.WebControls.WebControl
{
//声明变量
///
/// 进度条百分比
///
private int intPercentage = 0;
///
/// 列数
///
private int intCellCount = 20;
///
/// 填充图片网址
///
private string strFillImageUrl = "";
///
/// 进度条图片网址
///
private string strBarImageUrl = "";
///
/// 图片发生器网址
///
private string strImageGeneratorUrl = "";
///
/// 构造函数
///
public ProgressBar()
{
// 初始化进度条的背景颜色、字体颜色和边框颜色
BackColor = System.Drawing.Color.LightGray;
ForeColor = System.Drawing.Color.Blue;
BorderColor = Color.Empty;
//初始化进度条的宽度和高度
base.Width = Unit.Pixel(100);
base.Height = Unit.Pixel(16);
}
///
/// 进度条百分比步幅
///
public int PercentageStep
{
get{return 100 / intCellCount;}
set
{
if((100 % value) != 0)
{
throw new ArgumentException("百分比步副必须被100整除");
}
intCellCount = 100 / value;
}
}
///
/// 填充图片网址
///
public string FillImageUrl
{
get{return strFillImageUrl;}
set{strFillImageUrl = value;}
}
public string BarImageUrl
{
get{return strBarImageUrl;}
set{strBarImageUrl = value;}
}
public string ImageGeneratorUrl
{
get{return strImageGeneratorUrl;}
set{strImageGeneratorUrl = value;}
}
///
/// 设置进度条百分比
///
public int Percentage
{
get {return intPercentage;}
set
{
// 确定百分比在指定的范围内
//
if (value > 100) // 超过100则显示100
{
intPercentage = 100;
}
else if (value < 0) // 小于0则显示0
{
intPercentage = 0;
}
else
{
intPercentage = value;
}
}
}
///
/// 进度条输出参数
///
/// 进度条
protected override void Render(HtmlTextWriter output)
{
if (Width.Type != UnitType.Pixel)
{
throw new ArgumentException("宽度必须为象素");
}
int intWidth = (int)Width.Value;
if (ImageGeneratorUrl != "")
{
string strBorderColor = "";
if (BorderColor != Color.Empty)
{
strBorderColor = "&BorderColor=" + ColorTranslator.ToHtml(BorderColor);
}
output.Write(string.Format("",
ImageGeneratorUrl,
intWidth,
Height.ToString(),
Percentage,
ColorTranslator.ToHtml(ForeColor),
ColorTranslator.ToHtml(BackColor),
strBorderColor));
}
else
{
if (BorderColor != Color.Empty)
{
output.Write("
| ");
} if (BarImageUrl == "") { output.Write("
} else { int intImageWidth = (int)((intPercentage / 100.0) * intWidth); output.Write("
} if (BorderColor != Color.Empty) { output.Write(" |
}
}
}
}
}