protected void Page_Load(object sender, EventArgs e)
{
//string sql = "SELECT YEAR(DealDate) as year, COUNT(*) as count,Sum(price) as price FROM deal_fact WHERE deal='1' GROUP BY YEAR(DealDate) ORDER BY year ASC";
//string sql = "SELECT CAST(YEAR(DealDate) AS VARCHAR(4))+ '-' + CAST(MONTH(DealDate) AS VARCHAR(2)) AS MyDate, COUNT(*) as count,Sum(price) as price FROM deal_fact WHERE deal='1' GROUP BY CAST(YEAR(DealDate) AS VARCHAR(4))+ '-' + CAST(MONTH(DealDate) AS VARCHAR(2)) ORDER BY MyDate ASC";
string sql = "SELECT datename(YYYY, DealDate)+ '-' + DATENAME(MM, DealDate) AS MyDate, COUNT(*) as count,Sum(price) as price FROM deal_fact WHERE deal='1' GROUP BY DATENAME(YYYY, DealDate), DATENAME(MM, DealDate),DATEPART(YYYY, DealDate),DATEPART(MM, DealDate) ORDER BY DATEPART(YYYY, DealDate),DATEPART(MM, DealDate)";
//DataTable TempDataTable = new DataTable();
DataTable TempDataTable = DbHelperSQL.FindTable(3, sql);
//TempDataTable.Columns.Add("Name");
//TempDataTable.Columns.Add("Age");
//TempDataTable.Columns.Add("Address");
///////// JSON String with Rows And Cols////////////////////////////
//JSON_DataTable_DataHolder.Value= Object_JSON_Class.JSON_DataTable(TempDataTable);
///////// JSON String with Rows And ColNames////////////////////////////
//JSON_Parameter_DataHolder.Value= Object_JSON_Class.CreateJsonParameters(TempDataTable);
DataRow[] myrow = new DataRow[TempDataTable.Rows.Count];
TempDataTable.Rows.CopyTo(myrow, 0);
double[] myValue = Array.ConvertAll(myrow, new Converter <DataRow, double>(ConvertOriginToDouble));
double[] myValue2 = Array.ConvertAll(myrow, new Converter <DataRow, double>(ConvertPriceToDouble));
//double[] xValue ={2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018};
int length = myValue.GetLength(0);
int num = 5;//待预测数据个数
double[] xValue = new double[length + num];
//int s=Int32.Parse(TempDataTable.Rows[0][0].ToString());
for (int i = 0; i < (length + num); i++)
{
xValue[i] = Convert.ToDouble(i);
}
//for (int i = 1; i <= (length + num); i++) xValue[i] = Convert.ToDouble(i);
/*
* Response.Write("历史值： ");
* foreach (var item in xValue)
* {
* Response.Write(item.ToString() + " ");
* }
*/
//GM gm1 = new GM(myValue, num);
//double[] result = gm1.Result();
LinearRegression lr1 = new LinearRegression(myValue, xValue, num);
LinearRegression lr2 = new LinearRegression(myValue2, xValue, num);
double[] result = lr1.FirResult();
double[] result2 = lr2.FirResult();
DataColumn dc = new DataColumn("predict", typeof(string));
DataColumn dc2 = new DataColumn("predict2", typeof(string));
TempDataTable.Columns.Add(dc); TempDataTable.Columns.Add(dc2);
//int i;
for (int i = 0; i < (length + num); i++)
{
if (i >= length)
{
DataRow dr = TempDataTable.NewRow();
dr[0] = JSON_Class.YearMonthAdd(TempDataTable.Rows[i - 1][0].ToString(), 1);
dr[3] = Math.Round(result[i], 0).ToString();//将预测值四舍五入为整数
dr[4] = Math.Round(result2[i], 0).ToString();
TempDataTable.Rows.Add(dr);
}
else
{
DataRow dr = TempDataTable.Rows[i];
dr[0] = JSON_Class.YearMonthAdd(dr[0].ToString(), -1);
dr[3] = Math.Round(result[i], 0).ToString();
dr[4] = Math.Round(result2[i], 0).ToString();
}
}
JSON_Class Object_JSON_Class = new JSON_Class();
//string[] c = { "year", "origin", "price", "predict", "predict2" };
string[] c = { "date", "origin", "price", "predict", "predict2" };
sjson = Object_JSON_Class.JSON_DT_YearMonth(TempDataTable, c);//
//chartdiv.Style["width"] = "870px";
}