gid+实现多种统计图 ,支持负坐标

gid+实现多种统计图 ,支持负坐标


using System;


using System.Web.UI;


using System.Data;


using System.Web.UI.WebControls;


using System.Drawing;


using System.Drawing.Imaging;


using System.IO;


using System.Web;


using System.ComponentModel;


using System.Collections ;




namespace EI.Control






{




/**//// <summary>


/// 柱状图控件


/// 需要传入列表项名，值，超级连接地址


/// </summary>


[ToolboxData("<{0}:Columniation runat=server></{0}:Columniation>")]


public class Columniation: System.Web.UI.WebControls.WebControl






{


private const int _colorLimit = 12; //颜色列表


private Color[] _color =






{


Color.Chocolate,


Color.YellowGreen,


Color.Olive,


Color.DarkKhaki,


Color.Sienna,


Color.PaleGoldenrod,


Color.Peru,


Color.Tan,


Color.Khaki,


Color.DarkGoldenrod,


Color.Maroon,


Color.OliveDrab


};










private DataTable items;//列表项名称和值






private string text="实时数据";


private string datastd="标准值";


private string data="实时数据";






int kds=10; //刻度数


float kddw=100; //没刻度大小




int zmheight=500; //真个图区高


int zmwidth=740; //真个图区宽




int height=400;//呈现区高


int width=730;


int cxtop=30;//呈现区距顶距离


int cxleft=30;//呈现区左边距离




Color bzlink=Color.Black;//标准线颜色






int Chart_Flag=1;


Bitmap bm ;




int Displacement =0; //获取负坐标刻度数










[Bindable(true),


Category("Appearance"),


DefaultValue("")]


public string Text






{


get






{


return text;


}




set






{


text = value;


}


}




[Bindable(true),


Category("Appearance"),


DefaultValue("")]


public string DataStdName






{


get






{


return datastd;


}




set






{


datastd = value;


}


}




[Bindable(true),


Category("Appearance"),


DefaultValue("")]


public string DataName






{


get






{


return data;


}




set






{


data = value;


}


}






/**//// <summary>


/// 需要呈现的数据


/// </summary>


public DataTable Items






{


set






{items=value;}


}






/**//// <summary>


/// 需要显示的刻度量


/// </summary>


public int Kdcount






{




set

{kds=value;}


}






/**//// <summary>


/// 刻度大小


/// </summary>




public float Kddw






{set

{kddw=value;}}








public int ChatStyle






{set

{this.Chart_Flag=value;}}








/**//// <summary>


/// 将此控件呈现给指定的输出参数。


/// </summary>


/// <param text="output"> 要写出到的 HTML 代码 </param>


protected override void Render(HtmlTextWriter output)






{


//if(dt==null)


//{


// return "没有数据";


//}


//设计样式


kd(items);


output.Write(makeimage(items,"c:/"));






}




private string makeimage(DataTable dt,string imagefile)






{






string url="";




switch(Chart_Flag)






{


case 1:






{




this.Draw_X_Y_Bar(dt);


url=this.Drar_Bar(dt);




break;


}


case 2:






{






this.Draw_X_Y (dt);


url=this.Drow_Lin(dt);




break;


}


case 3:






{




url=this.Draw_Pie(dt);


break;


}




}




return url;






}




/**//// <summary>


/// 换算成实际值


/// </summary>


/// <param text="kd">提供的值</param>


/// <returns>返回换算后的实际值</returns>


private float bl(float kd)






{


float bls=1;


bls=(float)height/((float)kds*(float)kddw);


return (float)kd*bls;


}








//通过数据计算刻度,和负坐标数#region //通过数据计算刻度,和负坐标数




private void kd(DataTable dt)






{


float mintest=float.MaxValue;


float maxtest=float.MinValue;




float maxnegative=0f;






for (int j=1;j<dt.Columns .Count ;j++)






{


for(int i=0;i<dt.Rows.Count;i++)






{


float test=System.Convert.ToSingle(dt.Rows[i][j]);


//求最小值


if(test<0 && test<maxnegative)






{


maxnegative=test;


}


//求最大值


if(test>maxtest)






{


maxtest=test;


}


}


}




maxtest=maxtest+Math.Abs(maxnegative);




// this.Page .Response .Write (maxtest);




kddw=maxtest/kds;












double exp = Convert.ToDouble(Math.Floor(Math.Log10(maxtest)));




// this.Page .Response .Write ("exp"+exp.ToString ()+"<br>");


float tempMax = Convert.ToSingle(Math.Ceiling(maxtest / Math.Pow(10, exp)) * Math.Pow(10, exp));




// this.Page .Response .Write ("temp_Max"+exp.ToString ()+"<br>");






kddw = tempMax / kds;


double expTick = Convert.ToDouble(Math.Floor(Math.Log10(kddw)));


kddw = Convert.ToSingle(Math.Ceiling(kddw / Math.Pow(10, expTick)) * Math.Pow(10, expTick));


this.Displacement =Math.Abs ((int) Math.Floor(maxnegative/kddw));


// this.Page .Response.Write (this.Displacement);






}




#endregion








//




绘制折线图#region 绘制折线图　




　　 private string Drow_Lin(DataTable dt)






{






//通过循环画出曲线图


int x=-1;


int bzy=-1;








Graphics bp=Graphics.FromImage(bm);


for (int j=1;j<dt.Columns.Count ;j++)






{


for(int i=0;i<dt.Rows.Count;i++)






{




//标准刻度








float bzkd=bl(System.Convert.ToSingle(dt.Rows[i].ItemArray[j]));


//实际刻度


// float sjkd=bl(System.Convert.ToSingle(dt.Rows[i].ItemArray[2]));




int bztop=cxtop+height-(int)bzkd-3- (int) (bl(this.Displacement*kddw));


//填充标准柱(画刷，起点Ｘ，起点Ｙ，宽，高）








bp.FillRectangle(new SolidBrush(_color[j-1]),(i*40)+cxleft+20-3,bztop,6,6);


// int sstop=zmheight-(int)sjkd-(zmheight-cxtop-height)-3;


//填充实时点(画刷，起点Ｘ，起点Ｙ，宽，高）


// bp.FillRectangle(new SolidBrush(ss),(i*30)+cxleft,sstop,6,6);




//绘制点到点连接线


if(x!=-1)






{


//绘制标准点连接线




bp.DrawLine(new Pen( _color[j-1] ,1.6F),new Point(x,bzy),new Point((i*40)+cxleft+20,bztop));


//绘制实时点连接线


// bp.DrawLine(new Pen(ss,1.6F),new Point(x+3,ssy+4),new Point((i*30)+cxleft+10,sstop+4));


}


x=(i*40)+cxleft+20;


bzy=bztop;


// ssy=sstop;


// bp.DrawString(dt.Rows[i].ItemArray[0].ToString (),new Font("宋体",9),new SolidBrush(Color.Black),new PointF((i*40)+cxleft+10,height+cxtop+1));






}




x=-1;


}


FileStream fs=new FileStream(Page.Server.MapPath(Page.Request.Url.AbsolutePath.Replace(".aspx",".jpg")),FileMode.Create);


bm.Save(fs,ImageFormat.Jpeg);




bm.Dispose();


bp.Dispose();


fs.Close();


return "<img src="+Page.Request.Url.AbsolutePath.Replace(".aspx",".jpg")+" ></img>";




}




#endregion










画住状图#region 画住状图


//画住状图　






private string Drar_Bar(DataTable dt)






{ Graphics bp=Graphics.FromImage(bm);




int flag=0;


for(int i=0;i<dt.Rows.Count;i++)






{


for (int j=1;j<dt.Columns.Count ;j++)






{


float sjkd=bl(System.Convert.ToSingle(dt.Rows[i].ItemArray[j]));




float top= cxtop+height-(int)sjkd-(int)(bl(this.Displacement*kddw));


if (sjkd<0)






{


top=top+sjkd;


sjkd=Math.Abs (sjkd);


}




bp.FillRectangle(new SolidBrush(this._color[j]),(flag*40)+cxleft+20,top,20,sjkd);




// this.Page .Response .Write ("<br>"+ (flag*40+cxleft+20) );




flag++ ;






}


}




FileStream fs=new FileStream(Page.Server.MapPath(Page.Request.Url.AbsolutePath.Replace(".aspx",".jpg")),FileMode.Create);


bm.Save(fs,ImageFormat.Jpeg);




bm.Dispose();


bp.Dispose();


fs.Close();


return "<img src="+Page.Request.Url.AbsolutePath.Replace(".aspx",".jpg")+" ></img>";






}




#endregion










画　X,Y 轴 线和刻度#region 画　X,Y 轴 线和刻度　




private void Draw_X_Y(DataTable dt )






{




//调整宽度


width=45*dt.Rows.Count +30;




zmwidth=width+cxleft+80;


//创建一个画布




bm=new Bitmap(zmwidth,zmheight);


//在新建的画布上画一个图


Graphics bp=Graphics.FromImage(bm);




bp.Clear(Color.AliceBlue);


//填充图表呈现区背景(画刷,起点x，起点Y，高，宽)


bp.FillRectangle(new SolidBrush(Color.WhiteSmoke),cxleft,cxtop,width,height);


//描绘呈现区边框


bp.DrawRectangle(Pens.Black,cxleft,cxtop,width,height);




//绘制图表名称


bp.DrawString(text,new Font("宋体",9),new SolidBrush(Color.Black),new PointF(zmwidth/2,10));






//绘制图表说明


bp.DrawRectangle(Pens.Black,cxleft+width+10,zmheight/2,60,15*dt.Columns.Count -1);


for (int j=0;j<dt.Columns .Count-1 ;j++)






{


bp.FillRectangle(new SolidBrush(this._color[j]),cxleft+width+10+2,zmheight/2+6+16*j,8,8);


//文字说明


bp.DrawString(dt.Columns[j+1].ColumnName,new Font("宋体",9),new SolidBrush(Color.Black),new PointF(cxleft+width+10+2+8,zmheight/2+4+j*12));


}










//通过循环绘制标准线


for(int i=0;i<=kds;i++)






{






string Cur_Kd;


if (i-this.Displacement!=0)






{


Cur_Kd=((i-this.Displacement)*(kddw)).ToString ("#,###.##");


// this.Page .Response .Write ("<br>abc"+Cur_Kd.ToString ());


}


else






{


Cur_Kd="0";


}




bp.DrawString (Cur_Kd,new Font("宋体",9),new SolidBrush(Color.Black),new PointF(2,zmheight-(bl(i*kddw)+(zmheight-cxtop-height)+4)));


//填充标准线(画刷，起点Ｘ，起点Ｙ，宽，高）


int top=cxtop+height-(int)(bl(i*kddw));




bp.DrawLine(new Pen(bzlink),new Point(cxleft-4,top),new Point(cxleft+width,top));




}




for(int j=1;j<dt.Rows.Count+1;j++)






{




bp.DrawLine (new Pen (bzlink),new Point(cxleft+j*40, (int) (cxtop+height-bl(this.Displacement*kddw) ) ),new Point (cxleft+j*40, (int) (cxtop+height-bl(this.Displacement*kddw) )+4));




bp.DrawString(dt.Rows[j-1].ItemArray[0].ToString (),new Font("宋体",9),new SolidBrush(Color.Black),new PointF(((j-1)*40)+cxleft+10, (int) (cxtop+height-bl(this.Displacement*kddw) ) +1));




}


}


#endregion








画　柱状 x,y 　刻度#region 画　柱状 x,y 　刻度




private void Draw_X_Y_Bar (DataTable dt)






{


//调整宽度


width=45*dt.Rows.Count * (dt.Columns .Count-1) +10;




zmwidth=width+cxleft+80;


//创建一个画布




bm=new Bitmap(zmwidth,zmheight);


//在新建的画布上画一个图


Graphics bp=Graphics.FromImage(bm);




bp.Clear(Color.AliceBlue);


//填充图表呈现区背景(画刷,起点x，起点Y，高，宽)


bp.FillRectangle(new SolidBrush(Color.WhiteSmoke),cxleft,cxtop,width,height);


//描绘呈现区边框


bp.DrawRectangle(Pens.Black,cxleft,cxtop,width,height);




//绘制图表名称


bp.DrawString(text,new Font("宋体",9),new SolidBrush(Color.Black),new PointF(zmwidth/2,10));






//绘制图表说明


bp.DrawRectangle(Pens.Black,cxleft+width+10,zmheight/2,60,15*dt.Columns.Count -1);


for (int j=0;j<dt.Columns .Count-1 ;j++)






{


bp.FillRectangle(new SolidBrush(this._color[j]),cxleft+width+10+2,zmheight/2+6+16*j,8,8);


//文字说明


bp.DrawString(dt.Columns[j+1].ColumnName,new Font("宋体",9),new SolidBrush(Color.Black),new PointF(cxleft+width+10+2+8,zmheight/2+4+j*12));


}










//通过循环绘制标准线


for(int i=0;i<=kds;i++)






{






string Cur_Kd;


if (i-this.Displacement!=0)






{


Cur_Kd=((i-this.Displacement)*(kddw)).ToString ("#,###.##");


//


}


else






{


Cur_Kd="0";


}




bp.DrawString (Cur_Kd,new Font("宋体",9),new SolidBrush(Color.Black),new PointF(2,zmheight-(bl(i*kddw)+(zmheight-cxtop-height)+4)));


//填充标准线(画刷，起点Ｘ，起点Ｙ，宽，高）


int top=cxtop+height-(int)(bl(i*kddw));




bp.DrawLine(new Pen(bzlink),new Point(cxleft-4,top),new Point(cxleft+width,top));


// this.Page .Response .Write ("<br>abc"+Cur_Kd.ToString ());


}




for(int j=1;j<dt.Rows.Count+1;j++)






{




bp.DrawLine (new Pen (bzlink),new Point( cxleft+ (dt.Columns .Count -1)*j* 40, (int) (cxtop+height-bl(this.Displacement*kddw) ) ),new Point (cxleft+ (dt.Columns .Count -1)*j* 40, (int) (cxtop+height-bl(this.Displacement*kddw) )+12));




bp.DrawString(dt.Rows[j-1].ItemArray[0].ToString (),new Font("宋体",9),new SolidBrush(Color.Black),new PointF(( (dt.Columns .Count -1) *(j-1)*40)+cxleft+40, (int) (cxtop+height-bl(this.Displacement*kddw) ) +1));




}




}


#endregion






饼状图#region 饼状图




private string Draw_Pie(DataTable dt)






{




int width = 240;


const int page_top_margin = 15;




float total = 0.0F, tmp;


int i;


for (i=0; i < dt.Rows.Count; i++)






{


tmp = Convert.ToSingle(dt.Rows[i][1]);


total += tmp;


}








Font fontLegend = new Font("Verdana", 10);




Font fontTitle = new Font("Verdana", 12, FontStyle.Bold);


int titleHeight = fontTitle.Height + page_top_margin;






int row_gap = 6;


int start_of_rect = 8;


int rect_width = 14;


int rect_height = 16;




int row_height;


if (rect_height > fontLegend.Height) row_height = rect_height; else row_height = fontLegend.Height;


row_height += row_gap;




int legendHeight = row_height * (dt.Rows.Count+1);


int height = width + legendHeight + titleHeight + page_top_margin;


int pieHeight = width;


Rectangle pieRect = new Rectangle(0, titleHeight, width, pieHeight);










float currentDegree = 0.0F;






Bitmap bm = new Bitmap(width, height);


Graphics objGraphics= Graphics.FromImage(bm) ;




SolidBrush blackBrush = new SolidBrush(Color.Black);






objGraphics.FillRectangle(new SolidBrush(Color.White), 0, 0, width, height);


for (i = 0; i < dt.Rows.Count; i++)






{


objGraphics.FillPie(


new SolidBrush (this._color[i]),


pieRect,


currentDegree,


Convert.ToSingle(dt.Rows[i][1]) / total * 360);






currentDegree += Convert.ToSingle(dt.Rows[i][1]) / total * 360;


}






StringFormat stringFormat = new StringFormat();


stringFormat.Alignment = StringAlignment.Center;


stringFormat.LineAlignment = StringAlignment.Center;




objGraphics.DrawString(this.datastd, fontTitle, blackBrush,


new Rectangle(0, 0, width, titleHeight), stringFormat);








objGraphics.DrawRectangle(


new Pen(Color.Gray, 1),


0,


height - legendHeight,


width-4,


legendHeight-1);




int y = height - legendHeight + row_gap;




for (i = 0; i < dt.Rows.Count; i++)






{




objGraphics.FillRectangle(


new SolidBrush (this._color[i]),


start_of_rect, // x


y,


rect_width,


rect_height);




objGraphics.DrawString(


Convert.ToString(dt.Rows[i][0])


+ " - " +


Convert.ToString(dt.Rows[i][1]),


fontLegend,


blackBrush,


start_of_rect + rect_width + 4,


y);




y += rect_height + row_gap;






}












FileStream fs=new FileStream(Page.Server.MapPath(Page.Request.Url.AbsolutePath.Replace(".aspx",".jpg")),FileMode.Create);


bm.Save(fs,ImageFormat.Jpeg);




bm.Dispose();


objGraphics.Dispose();


fs.Close();


return "<img src="+Page.Request.Url.AbsolutePath.Replace(".aspx",".jpg")+" ></img>";




}


#endregion






}


}