我正在使用数据表来存储一些数据。在for循环检查数据表的长度后，数据表将自行清除。其中没有数据。你能告诉它为什么会这样吗？这是使用DevExpress报告引擎创建报告的报告的一部分。
DataTable ResultList = new DataTable();
ResultList.Columns.Add("range");
ResultList.Columns.Add("bpfrom");
ResultList.Columns.Add("bpto");
ResultList.Columns.Add("qualMemb");
ResultList.Columns.Add("qualTurn");
ResultList.Columns.Add("qualTurnPercent");
ResultList.Columns.Add("grMemb");
ResultList.Columns.Add("grTurn");
ResultList.Columns.Add("grTurnPercent");
ResultList.Columns.Add("totalamt");
ResultList.Columns.Add("giftlevel");
string[] fromrangelist = fromrange.Split(',');
string[] torangelist = torange.Split(',');
int j;
if (fromrange == "")
{
DataRow dr = ResultList.NewRow();
dr["range"] = 1;
dr["bpfrom"] = 0;
dr["bpto"] = 100000000; //biggest value
dr["giftlevel"] = "ALL";
ResultList.Rows.Add(dr);
}
else
{
for (j = 0; j < fromrangelist.Length; j++)
{
DataRow dr = ResultList.NewRow();
dr["range"] = j + 1;
dr["bpfrom"] = Convert.ToDecimal(fromrangelist[j]);
dr["bpto"] = Convert.ToDecimal(torangelist[j]);
dr["giftlevel"] = "level:" + (j + 1).ToString() + "(" + fromrangelist[j] + "-" + torangelist[j] + ")";
ResultList.Rows.Add(dr);
}
}
//Get ALL Total spend
decimal TotalSpend = Math.Round((from table1 in context.mmsspddtls
where table1.mmsspdcpcd.Equals(cpcd) && table1.mmsspdbrcd.Equals(brcd)
&& table1.mmsspdtxdt >= fromtxdate && table1.mmsspdtxdt <= totxdate
&& (table1.mmsspdtxty.Equals(null) || table1.mmsspdtxty.Equals("") || table1.mmsspdtxty.Equals("PS") || table1.mmsspdtxty.Equals("PE") || table1.mmsspdtxty.Equals("PR"))
&& (table1.mmsspdplna.Equals('1') || table1.mmsspdplna.Equals('5') || table1.mmsspdplna.Equals('P') || table1.mmsspdplna.Equals('T') || table1.mmsspdplna.Equals('A') || table1.mmsspdplna.Equals('L'))
&& !table1.mmsspdstfg.Equals('V')
select new
{
totalamt = table1.mmsspdpram
}).Sum(s => s.totalamt), 2);
for (int i = 0; i < ResultList.Rows.Count; i++)
{
decimal fromvalue = Convert.ToDecimal(ResultList.Rows[i]["bpfrom"]);
decimal tovalue = Convert.ToDecimal(ResultList.Rows[i]["bpto"]);
ResultList.Rows[i]["totalamt"] = TotalSpend;
//Member Query that match the range
var MemberQuery = (from table1 in context.mmscrdlogs
where table1.mmscdlcpcd.Equals(cpcd) && table1.mmscdlbrcd.Equals(brcd)
&& table1.mmscdlstst.Equals('N') && table1.mmscdlbpis >= fromvalue && table1.mmscdlbpis <= tovalue
&& table1.mmscdleddt >= fromexpiredate && table1.mmscdleddt <= toexpiredate
select new
{
spendfr = fromvalue,
spendto = tovalue,
membercode = table1.mmscdlmbcd
}).Distinct();
//Count of member in the range
ResultList.Rows[i]["qualMemb"] = MemberQuery.Count();
//member total spend in the range
decimal qualTurn = 0;
var qualQuery = (from table1 in context.mmsspddtls
from table2 in MemberQuery.Where(s => s.membercode == table1.mmsspdmbcd)
where table1.mmsspdcpcd.Equals(cpcd) && table1.mmsspdbrcd.Equals(brcd)
&& table1.mmsspdtxdt >= fromtxdate && table1.mmsspdtxdt <= totxdate
&& (table1.mmsspdtxty.Equals(null) || table1.mmsspdtxty.Equals("") || table1.mmsspdtxty.Equals("PS") || table1.mmsspdtxty.Equals("PE") || table1.mmsspdtxty.Equals("PR"))
&& (table1.mmsspdplna.Equals('1') || table1.mmsspdplna.Equals('5') || table1.mmsspdplna.Equals('P') || table1.mmsspdplna.Equals('T') || table1.mmsspdplna.Equals('A') || table1.mmsspdplna.Equals('L'))
&& !table1.mmsspdstfg.Equals('V')
select new
{
totalamt = table1.mmsspdpram
});
if(qualQuery.Count() > 0)
{
qualTurn = Math.Round(qualQuery.Sum(s => s.totalamt), 2);
}
ResultList.Rows[i]["qualTurn"] = qualTurn;
//member total spend% with total in the range
if (qualTurn == 0)
ResultList.Rows[i]["qualTurnPercent"] = 0;
else
ResultList.Rows[i]["qualTurnPercent"] = Math.Round((qualTurn / TotalSpend) * 100, 2);
var MemberQueryGR = (from table1 in context.mmsspddtls
from table2 in context.pxppludpxes.Where(s => s.pxppdxcpcd.Equals(table1.mmsspdcpcd) && s.pxppdxbrcd.Equals(table1.mmsspdbrcd) && s.pxppdxplcd.Equals(table1.mmsspdplcd))
from table3 in context.mmssyspars.Where(s => s.mmssypcpcd.Equals(table1.mmsspdcpcd) && s.mmssypbrcd.Equals(table1.mmsspdbrcd))
where table1.mmsspdcpcd.Equals(cpcd) && table1.mmsspdbrcd.Equals(brcd)
&& table2.pxppdxpx01 / (table3.mmssypbpmt / table3.mmssyppont) >= fromvalue
&& table2.pxppdxpx01 / (table3.mmssypbpmt / table3.mmssyppont) <= tovalue
&& table1.mmsspdtxty.Equals("GR") && table1.mmsspdplna.Equals('2')
&& table1.mmsspdtxdt >= fromtxdate && table1.mmsspdtxdt <= totxdate
select new
{
spendfr = fromvalue,
spendto = tovalue,
membercode = table1.mmsspdmbcd
}).Distinct();
//Count of GR member in the range
ResultList.Rows[i]["grMemb"] = MemberQueryGR.Count();
//GR member total spend in the range
decimal grTurn = 0;
if (MemberQueryGR.Count() > 0)
{
var grQuery = (from table1 in context.mmsspddtls
from table2 in MemberQueryGR.Where(s => s.membercode == table1.mmsspdmbcd)
where table1.mmsspdcpcd.Equals(cpcd) && table1.mmsspdbrcd.Equals(brcd)
&& table1.mmsspdtxdt >= fromtxdate && table1.mmsspdtxdt <= totxdate
&& (table1.mmsspdtxty.Equals(null) || table1.mmsspdtxty.Equals("") || table1.mmsspdtxty.Equals("PS") || table1.mmsspdtxty.Equals("PE") || table1.mmsspdtxty.Equals("PR"))
&& (table1.mmsspdplna.Equals('1') || table1.mmsspdplna.Equals('5') || table1.mmsspdplna.Equals('P') || table1.mmsspdplna.Equals('T') || table1.mmsspdplna.Equals('A') || table1.mmsspdplna.Equals('L'))
&& !table1.mmsspdstfg.Equals('V')
select new
{
totalamt = table1.mmsspdpram
});
if(grQuery.Count() > 0)
{
grTurn = Math.Round(grQuery.Sum(s => s.totalamt), 2);
}
}
ResultList.Rows[i]["grTurn"] = grTurn;
//member total spend% with total in the range
if (grTurn == 0)
ResultList.Rows[i]["grTurnPercent"] = 0;
else
ResultList.Rows[i]["grTurnPercent"] = Math.Round((grTurn / TotalSpend) * 100, 2);
}
DataSource = ResultList;
}
请指教。感谢