using system.collections;using system.componentmodel;using system.data;using system.drawing;using system.web;using system.web.sessionstate;using system.web.ui;using system.web.ui.webcontrols;using system.web.ui.htmlcontrols;using system.drawing.imaging;using system.drawing.drawing2d;namespace commonu
{
/**//// <summary>
/// webform2 的摘要說明。
/// </summary> public class webform2 : system.web.ui.page { private void page_load(object sender, system.eventargs e) { /**//*自寫編碼*/ int imgwidth=600; //1.[總寬度] ***圖寬度 int imgheight=300; //2.[總高度] ***圖高度 int itemnum=1; //3.[項目數量] ***圖表劃分的塊 int childnum=6; //4.[塊數] ***大塊中劃分的子項的數量 float childrate=0.6f; //5.[各塊總占空間比率] //int childspace=15; //6.[各塊間的間距] int chartleft=80; //7.[圖表左邊距] ***圖表距圖的左邊距離 int chartright=50; //8.[圖表右邊距] ***圖表距圖的右邊距離 int charttop=50; //9.[圖表頂邊距] ***圖表距圖頂邊距離 int chartbottom=50; //10.[圖表底邊距] ***圖表距圖底邊距離 int ymaxvalue=5000; //11.[縱坐標標尺最大值] ***縱坐標標尺的最大值 int yitemnum=10; //12.[縱坐標標尺段數] ***縱坐標標尺的段數 int ytop=15; //13.[距縱軸頂端間隔] int ystrstart=35; //14.[縱坐標標尺文字起始x坐標] int xright=15; //15.[距橫軸右端間隔] int xstrstart=20; //16.[橫坐標標尺文字起始y坐標] //[圖表總寬度]=[總寬度]-[圖表左邊距]-[圖表右邊距]-[距橫軸右端間隔] int chartwidth=imgwidth-chartleft-chartright-xright; //[項目寬度]=[圖表總寬度]/[項目數量] int itemwidth=chartwidth/itemnum; //[各塊總占空間比率的實際寬度]=[項目寬度]*[各塊總占空間比率] int factwidth=convert.toint32(math.floor(itemwidth*childrate)); //[各塊矩形寬度]=[各塊總占空間比率的實際寬度]/[塊數] int rectanglewidth=factwidth/childnum; //[各塊間的間距]=([項目寬度]-[各塊總占空間比率的實際寬度])/([塊數]+1) int childspace=convert.toint32(math.floor((itemwidth-factwidth)/(childnum+1))); graphics objgps;//建立畫板對象 bitmap objbitmap = new bitmap(imgwidth,imgheight);//建立位圖對象 objgps = graphics.fromimage(objbitmap);//根據位圖對象建立畫板對象 objgps.clear(color.white);//設置畫板對象的背景色 int[] arrvalues={0,0,0,0,0,0};//數據數組 //arrvalues[0]=500; arrvalues[0]=convert.toint32(math.floor((imgheight-chartbottom-charttop-ytop)*500/ymaxvalue)); //處理顯示數據，進行圖表數值對應 arrvalues[1]=convert.toint32(math.floor((imgheight-chartbottom-charttop-ytop)*700/ymaxvalue)); arrvalues[2]=convert.toint32(math.floor((imgheight-chartbottom-charttop-ytop)*900/ymaxvalue)); arrvalues[3]=convert.toint32(math.floor((imgheight-chartbottom-charttop-ytop)*1000/ymaxvalue)); arrvalues[4]=convert.toint32(math.floor((imgheight-chartbottom-charttop-ytop)*1400/ymaxvalue)); arrvalues[5]=convert.toint32(math.floor((imgheight-chartbottom-charttop-ytop)*2200/ymaxvalue)); string[] arrvaluenames={"0","0","0","0","0","0","0","0","0","0"};//月份 arrvaluenames[0] = "一月"; arrvaluenames[1]="二月"; arrvaluenames[2] = "三月"; arrvaluenames[3]="四月"; arrvaluenames[4]="五月"; arrvaluenames[5]="六月"; arrvaluenames[6] = "七月"; arrvaluenames[7]="八月"; arrvaluenames[8]="九月"; arrvaluenames[9]="十月"; //得出矩形寬度，和畫圖x軸位置 //[項目寬度]=[總寬度]/[項目數量] //======[各塊總占空間比率]=（[各塊矩形寬度]+[各塊間的間距]）/[項目寬度] //[各塊總占空間比率的實際寬度]=[項目寬度]*[各塊總占空間比率] //[各塊矩形寬度]=（[各塊總占空間比率的實際寬度]-[各塊間的間距]*（[塊數]））/[塊數] //[一邊空余空間寬度]=（[項目寬度]-[各塊所占空間比率的總寬度]）/2 system.drawing.point[] pi=new point[arrvalues.length]; //定義折線點的對象數組 system.drawing.point[] pit=new point[3]; //定義坐標三角點的對象數組 system.drawing.pen pe=new pen(new solidbrush(getcolor(7)),1f); //定義畫直線的對象 //畫縱軸 objgps.drawline(pe,new point(chartleft,imgheight-chartbottom),new point(chartleft,charttop)); //畫縱軸終點箭頭 pit[0].x=imgwidth-chartright; //確定三角形三點的位置 pit[0].y=imgheight-chartbottom-4; pit[1].x=imgwidth-chartright; pit[1].y=imgheight-chartbottom+4; pit[2].x=imgwidth-chartright+10; pit[2].y=imgheight-chartbottom; objgps.fillpolygon(new solidbrush(getcolor(7)),pit); //畫縱軸標尺和標尺描述 for(int i=1;i<=yitemnum;i++) { //畫標尺 objgps.drawline(pe,new pointf(chartleft,imgheight-chartbottom-(imgheight-chartbottom-charttop-ytop)/yitemnum*i),new pointf(chartleft-5,imgheight-chartbottom-(imgheight-chartbottom-charttop-ytop)/yitemnum*i)); //畫描述 objgps.drawstring(arrvaluenames[i-1].tostring(),new font("宋體",10),brushes.black,new point(ystrstart,imgheight-chartbottom-(imgheight-chartbottom-charttop-ytop)/yitemnum*i-5)); } //畫橫軸 objgps.drawline(pe,new point(chartleft,imgheight-chartbottom),new point(imgwidth-chartright,imgheight-chartbottom)); //畫橫軸終點箭頭 pit[0].x=chartleft-4; //確定三角形三點的位置 pit[0].y=charttop; pit[1].x=chartleft+4; pit[1].y=charttop; pit[2].x=chartleft; pit[2].y=charttop-10; objgps.fillpolygon(new solidbrush(getcolor(7)),pit); //畫橫軸標尺和標尺描述 for(int i=1;i<=itemnum;i++) { objgps.drawline(pe,new pointf(chartleft+itemwidth*i,imgheight-chartbottom),new pointf(chartleft+itemwidth*i,imgheight-chartbottom+5)); objgps.drawstring(arrvaluenames[i-1].tostring(),new font("宋體",10),brushes.black,new point(chartleft+childspace+itemwidth*(i-1),imgheight-chartbottom+xstrstart)); } for(int j = 0;j<arrvalues.length;j++)//畫矩形圖和折線圖 { objgps.fillrectangle(new solidbrush(getcolor(j)),(j*(childspace+rectanglewidth))+childspace+chartleft,imgheight-chartbottom-arrvalues[j],rectanglewidth,arrvalues[j]); objgps.drawrectangle(pens.black,(j*(childspace+rectanglewidth))+childspace+chartleft,imgheight-chartbottom-arrvalues[j],rectanglewidth,arrvalues[j]); pi[j].x=(j*(childspace+rectanglewidth))+childspace+chartleft; pi[j].y=imgheight-chartbottom-arrvalues[j]; pe.setlinecap(system.drawing.drawing2d.linecap.roundanchor,system.drawing.drawing2d.linecap.roundanchor,system.drawing.drawing2d.dashcap.round); if(j>0) { objgps.drawline(pe,pi[j-1],pi[j]); } } objbitmap.save(response.outputstream,imageformat.gif);//該位圖對象以"gif"格式輸出 }/**//// <param name="itemindex">系統定義的顏色，有效值0到7，分別為（blue，yellow，red，orange，purple，brown，pink，black）</param>/// <returns></returns> public static color getcolor(int itemindex) { color objcolor = new color(); switch(itemindex) { case 0: objcolor = color.blue; break; case 1: objcolor = color.yellow; break; case 2: objcolor = color.red; break; case 3: objcolor = color.orange; break; case 4: objcolor = color.purple; break; case 5: objcolor = color.brown; break; case 6: objcolor = color.pink; break; default: objcolor = color.black; break; } return objcolor; }/**//// <param name="red">自定義顏色紅色分量值，有效值0到255</param>/// <param name="green">自定義顏色綠色分量值，有效值0到255</param>/// <param name="blue">自定義顏色藍色分量值，有效值0到255</param>/// <returns></returns> public static color getcolor(int red,int green,int blue) { color objcolor = new color(); objcolor = color.fromargb(red,green,blue); return objcolor; }新聞熱點
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