using?System;
using?System.IO;//用于文件存取?
using?System.Data;//用于數據訪問?
using?System.Drawing;//提供畫GDI+圖形的基本功能?
using?System.Drawing.Text;//提供畫GDI+圖形的高級功能?
using?System.Drawing.Drawing2D;//提供畫高級二維，矢量圖形功能?
using?System.Drawing.Imaging;//提供畫GDI+圖形的高級功能?
namespace?baselayer
{
????public?class?PieChart
????{
????????public?PieChart（）
????????{
????????}
????????//Render是圖形大標題，圖開小標題，圖形寬度，圖形長度，餅圖的數據集和餅圖的數據集要表示出來的數據?
????????public?Image?Render（string?title?string?subtitle?int?width?int?height?DataSet?chartData?int?DataLine）
????????{
????????????const?int?SIDE_LENGTH?=?400;
????????????const?int?PIE_DIAMETER?=?200;
????????????DataTable?dt?=?chartData.Tables[0];

????????????//通過輸入參數，取得餅圖中的總基數?
????????????float?sumData?=?0;
????????????foreach?（DataRow?dr?in?dt.Rows）
????????????{
????????????????sumData?+=?Convert.ToSingle（dr[DataLine]）;
????????????}
????????????//產生一個image對象，并由此產生一個Graphics對象?
????????????Bitmap?bm?=?new?Bitmap（width?height）;
????????????Graphics?g?=?Graphics.FromImage（bm）;
????????????//設置對象g的屬性?
????????????g.ScaleTransform（（Convert.ToSingle（width））?/?SIDE_LENGTH?（Convert.ToSingle（height））?/?SIDE_LENGTH）;
????????????g.SmoothingMode?=?SmoothingMode.Default;
????????????g.TextRenderingHint?=?TextRenderingHint.AntiAlias;

????????????//畫布和邊的設定?
????????????g.Clear（Color.White）;
????????????g.DrawRectangle（Pens.Black?0?0?SIDE_LENGTH?-?1?SIDE_LENGTH?-?1）;
????????????//畫餅圖標題?
????????????g.DrawString（title?new?Font（“Tahoma“?14）?Brushes.Black?new?PointF（5?5））;
????????????//畫餅圖的圖例?
????????????g.DrawString（subtitle?new?Font（“Tahoma“?12）?Brushes.Black?new?PointF（7?35））;
????????????//畫餅圖?
????????????float?curAngle?=?0;
????????????float?totalAngle?=?0;
????????????for?（int?i?=?0;?i?????????????{
????????????????curAngle?=?Convert.ToSingle（dt.Rows[i][DataLine]）?/?sumData?*?360;

????????????????g.FillPie（new?SolidBrush（ChartUtil.GetChartItemColor（i））?100?65?PIE_DIAMETER?PIE_DIAMETER?totalAngle?curAngle）;
????????????????g.DrawPie（Pens.Black?100?65?PIE_DIAMETER?PIE_DIAMETER?totalAngle?curAngle）;
????????????????totalAngle?+=?curAngle;
????????????}
????????????//畫圖例框及其文字?
????????????g.DrawRectangle（Pens.Black?200?300?199?99）;
????????????g.DrawString（“圖表說明“?new?Font（“Tahoma“?12?Fontstyle.Bold）?Brushes.Black?new?PointF（200?300））;

????????????//畫圖例各項?
????????????PointF?boxOrigin?=?new?PointF（210?330）;
????????????PointF?textOrigin?=?new?PointF（235?326）;
????????????float?percent?=?0;
????????????for?（int?i?=?0;?i?????????????{
????????????????g.FillRectangle（new?SolidBrush（ChartUtil.GetChartItemColor（i））?boxOrigin.X?boxOrigin.Y?20?10）;
????????????????g.DrawRectangle（Pens.Black?boxOrigin.X?boxOrigin.Y?20?10）;
????????????????percent?=?Convert.ToSingle（dt.Rows[i][DataLine]）?/?sumData?*?100;
????????????????g.DrawString（dt.Rows[i][1].ToString（）?+?“?-?“?+?dt.Rows[i][0].ToString（）?+?“

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????20480??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\bin\Debug\畫餅裝圖.dll

?????文件??????15872??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\bin\Debug\畫餅裝圖.pdb

?????文件???????8419??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\Class1.cs

?????文件??????20480??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\obj\Debug\畫餅裝圖.dll

?????文件??????15872??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\obj\Debug\畫餅裝圖.pdb

?????文件????????299??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\obj\畫餅裝圖.csproj.FileListAbsolute.txt

?????文件???????1329??2009-03-10?14:33??畫餅裝圖\畫餅裝圖\Properties\AssemblyInfo.cs

?????文件???????2005??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\畫餅裝圖.csproj

?????文件????????925??2009-03-10?14:33??畫餅裝圖\畫餅裝圖.sln

????..A..H.??????9216??2009-03-10?16:52??畫餅裝圖\畫餅裝圖.suo

?????目錄??????????0??2009-03-10?14:33??畫餅裝圖\畫餅裝圖\obj\Debug\TempPE

?????目錄??????????0??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\bin\Debug

?????目錄??????????0??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\obj\Debug

?????目錄??????????0??2009-03-10?14:33??畫餅裝圖\畫餅裝圖\bin

?????目錄??????????0??2009-03-10?14:34??畫餅裝圖\畫餅裝圖\obj

?????目錄??????????0??2009-03-10?14:33??畫餅裝圖\畫餅裝圖\Properties

?????目錄??????????0??2009-03-10?14:34??畫餅裝圖\畫餅裝圖

?????目錄??????????0??2009-03-10?14:33??畫餅裝圖

-----------?---------??----------?-----??----

????????????????94897????????????????????18