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 的摘要说明。
/// </summary> public class webform2 : system.web.ui.page { private void page_load(object sender, system.eventargs e) { /**//*自写编码*/ int imgwidth=600; //1.[总宽度] ***图宽度 int imgheight=300; //2.[总高度] ***图高度 int itemnum=1; //3.[项目数量] ***图表划分的块 int childnum=6; //4.[块数] ***大块中划分的子项的数量 float childrate=0.6f; //5.[各块总占空间比率] //int childspace=15; //6.[各块间的间距] int chartleft=80; //7.[图表左边距] ***图表距图的左边距离 int chartright=50; //8.[图表右边距] ***图表距图的右边距离 int charttop=50; //9.[图表顶边距] ***图表距图顶边距离 int chartbottom=50; //10.[图表底边距] ***图表距图底边距离 int ymaxvalue=5000; //11.[纵坐标标尺最大值] ***纵坐标标尺的最大值 int yitemnum=10; //12.[纵坐标标尺段数] ***纵坐标标尺的段数 int ytop=15; //13.[距纵轴顶端间隔] int ystrstart=35; //14.[纵坐标标尺文字起始x坐标] int xright=15; //15.[距横轴右端间隔] int xstrstart=20; //16.[横坐标标尺文字起始y坐标] //[图表总宽度]=[总宽度]-[图表左边距]-[图表右边距]-[距横轴右端间隔] int chartwidth=imgwidth-chartleft-chartright-xright; //[项目宽度]=[图表总宽度]/[项目数量] int itemwidth=chartwidth/itemnum; //[各块总占空间比率的实际宽度]=[项目宽度]*[各块总占空间比率] int factwidth=convert.toint32(math.floor(itemwidth*childrate)); //[各块矩形宽度]=[各块总占空间比率的实际宽度]/[块数] int rectanglewidth=factwidth/childnum; //[各块间的间距]=([项目宽度]-[各块总占空间比率的实际宽度])/([块数]+1) int childspace=convert.toint32(math.floor((itemwidth-factwidth)/(childnum+1))); graphics objgps;//建立画板对象 bitmap objbitmap = new bitmap(imgwidth,imgheight);//建立位图对象 objgps = graphics.fromimage(objbitmap);//根据位图对象建立画板对象 objgps.clear(color.white);//设置画板对象的背景色 int[] arrvalues={0,0,0,0,0,0};//数据数组 //arrvalues[0]=500; arrvalues[0]=convert.toint32(math.floor((imgheight-chartbottom-charttop-ytop)*500/ymaxvalue)); //处理显示数据，进行图表数值对应 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"; //得出矩形宽度，和画图x轴位置 //[项目宽度]=[总宽度]/[项目数量] //======[各块总占空间比率]=（[各块矩形宽度]+[各块间的间距]）/[项目宽度] //[各块总占空间比率的实际宽度]=[项目宽度]*[各块总占空间比率] //[各块矩形宽度]=（[各块总占空间比率的实际宽度]-[各块间的间距]*（[块数]））/[块数] //[一边空余空间宽度]=（[项目宽度]-[各块所占空间比率的总宽度]）/2 system.drawing.point[] pi=new point[arrvalues.length]; //定义折线点的对象数组 system.drawing.point[] pit=new point[3]; //定义坐标三角点的对象数组 system.drawing.pen pe=new pen(new solidbrush(getcolor(7)),1f); //定义画直线的对象 //画纵轴 objgps.drawline(pe,new point(chartleft,imgheight-chartbottom),new point(chartleft,charttop)); //画纵轴终点箭头 pit[0].x=imgwidth-chartright; //确定三角形三点的位置 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); //画纵轴标尺和标尺描述 for(int i=1;i<=yitemnum;i++) { //画标尺 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)); //画描述 objgps.drawstring(arrvaluenames[i-1].tostring(),new font("宋体",10),brushes.black,new point(ystrstart,imgheight-chartbottom-(imgheight-chartbottom-charttop-ytop)/yitemnum*i-5)); } //画横轴 objgps.drawline(pe,new point(chartleft,imgheight-chartbottom),new point(imgwidth-chartright,imgheight-chartbottom)); //画横轴终点箭头 pit[0].x=chartleft-4; //确定三角形三点的位置 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); //画横轴标尺和标尺描述 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("宋体",10),brushes.black,new point(chartleft+childspace+itemwidth*(i-1),imgheight-chartbottom+xstrstart)); } for(int j = 0;j<arrvalues.length;j++)//画矩形图和折线图 { 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);//该位图对象以"gif"格式输出 }/**//// <param name="itemindex">系统定义的颜色，有效值0到7，分别为（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">自定义颜色红色分量值，有效值0到255</param>/// <param name="green">自定义颜色绿色分量值，有效值0到255</param>/// <param name="blue">自定义颜色蓝色分量值，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; }新闻热点
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