C#datagridview Total Processing

On the Internet to check some of the total code, but found that most of them are not satisfactory, they then changed according to the information.

#regionTotal//Invoke Method Example//Heji heji = null; //Heji = new Heji (LABEL1,DATAGRIDVIEW1); //Heji.            Addheji ("ftransportoperator_id", 4); //Heji.            Addheji ("floadingteam_id", 6); //Heji.sumdata ();                 Public classHeji {//two control text, table        PrivateLabel Lab1; PrivateDataGridView Grid; //defines a private variable for a class, and two is a scroll barHScrollBar HS;        VScrollBar vs; //Total list of informationListNewList(); //Initialize         PublicHeji () {} PublicHeji (Label Lab, DataGridView grid) {LAB1=Lab; Grid=Grid; HS= ((HScrollBar) This. grid.controls[0]); VS= ((VScrollBar) This. grid.controls[1]); Hs. ValueChanged+=NewEventHandler (hs_valuechanged); Vs. ValueChanged+=NewEventHandler (vs_valuechanged); Lab1.paint+=NewPainteventhandler (Lab_paint); Grid.cellvaluechanged+=NewDatagridviewcelleventhandler (cellvaluechanged); }        //scroll bar Delegate Event         Public voidHs_valuechanged (Objectsender, EventArgs e) {             This.        Lab1.invalidate (); }         Public voidVs_valuechanged (Objectsender, EventArgs e) {             This.        Lab1.invalidate (); }        /// <summary>        ///Table Value Change/// </summary>        /// <param name= "Sender" ></param>        /// <param name= "E" ></param>        Private voidCellvaluechanged (Objectsender, DataGridViewCellEventArgs e)        {Sumdata (); }        /// <summary>        /////Add columns that need to be totaled/// </summary>        /// <param name= "name" >Field name</param>        /// <param name= "number" >Column Index</param>         Public voidAddheji (stringNameintNumber ) {Rectangle rec= This. Grid.getcelldisplayrectangle (number,0,false); Li. ADD (Newhejimessage (name, Number,rec)); }        /// <summary>        ///Paint Delegate event, repaint/// </summary>        /// <param name= "Sender" ></param>        /// <param name= "E" ></param>        Private voidLab_paint (Objectsender, PaintEventArgs e) {datagridviewcolumncollection Columns= This.            Grid.columns; intCount =Grid.Columns.Count; Graphics GRF=E.graphics; StringFormat strfmt=NewStringFormat (); Strfmt. Alignment=Stringalignment.center; //determine which lines are displayed, and use rows to get rectangle location information            foreach(Hejimessage Hejiinchli) {Rectangle rec= This. Grid.getcelldisplayrectangle (Heji. Cellnumber,0,false);  for(inti =0; i < Grid.Rows.Count; i++)                {                    if(Grid.rows[i]. Displayed) {Rec= This. Grid.getcelldisplayrectangle (Heji. Cellnumber, I,false); Heji. Rec=Rec; Console.WriteLine ("Display behavior:"+i.tostring ());  Break; }} GRF. DrawString (string. Format ("{0:F2}", Heji.hejisum), This. Lab1.font, Brushes.black, This. Grid.left + Heji. Rec.x,3, STRFMT); }                  }        //Calculate sum         Public voidSumdata () {datagridviewrowcollection rows= This.            Grid.rows; foreach(Hejimessage Hejiinchli) {heji.hejisum=0; foreach(DataGridViewRow rowinchrows) {Heji.hejisum+=convert.todecimal (row. Cells[heji.hejiname].                                   Value); }            }                      //re-painting             This.        Lab1.invalidate (); }    }    //Aggregate required information, column name, column index, SUM, location information     Public classHejimessage { Public  stringHejiname =NULL;  Public intCellnumber =0;  Public decimalHejisum =0;  PublicRectangle Rec;  Publichejimessage () {}/// <summary>        ///Initialize/// </summary>        /// <param name= "name" >Column Name</param>        /// <param name= "number" >Column Index</param>        /// <param name= "Rec" >Location Information</param>        PublicHejimessage (stringNameintNumber,rectangle Rec) {Hejiname=name; Cellnumber=Number ; Rec=Rec; }    }#endregion

C#datagridview Total Processing