我有一个下面显示的linq查询，但是它正在生成服务器错误：
重写查询或将其分解为较小的查询
如何解决它或将其分解为较小的查询？就我而言，我的本地服务器可以正常工作，但是在IIS实时服务器中生成错误。
var LinkQList = db.Customers.Select(c => new
{
UnitId = c.UnitId,
CustomerId = c.CustomerId,
MemoDate = c.MemoMasters.Select(a => new { a.MemoDate }),
CustomerName = c.CustomerName,
SalesManName = c.SalesMan.SalesManName,
SalesManagerName = c.SalesMan.SalesManager.SalesManagerName,
DistrictName = c.Upazila.District.DistrictName,
//**Previous Year
PreviousYearOpeningMemoDiscount = c.MemoMasters.Where(s => s.MemoDate < aYearPreviousFromDate).Select(a => new { a.MemoDiscount }).Sum(s => s.MemoDiscount) ?? 0,
PreviousYearOpeningGatOther = c.MemoMasters.Where(s => s.MemoDate < aYearPreviousFromDate).Select(a => new { a.GatOther }).Sum(s => s.GatOther) ?? 0,
PreviousYearOpeningGrossSales = c.MemoMasters.Where(s => s.MemoDate < aYearPreviousFromDate).Select(a => new { a.MemoCost }).Sum(s => (double?)s.MemoCost) ?? 0,
PreviousYearQuantity = c.MemoMasters.Where(s => s.MemoDate >= aYearPreviousFromDate && s.MemoDate <= aYearPreviousToDate).Select(a => new { a.Quantity }).Sum(s => s.Quantity) ?? 0,
PreviousYearQuantityConverted = c.MemoMasters.Where(s => s.MemoDate >= aYearPreviousFromDate && s.MemoDate <= aYearPreviousToDate).Select(a => new { a.QuantityConverted }).Sum(s => s.QuantityConverted) ?? 0,
PreviousYearMemoDiscount = c.MemoMasters.Where(s => s.MemoDate >= aYearPreviousFromDate && s.MemoDate <= aYearPreviousToDate).Select(a => new { a.MemoDiscount }).Sum(s => s.MemoDiscount) ?? 0,
PreviousYearGatOther = c.MemoMasters.Where(s => s.MemoDate >= aYearPreviousFromDate && s.MemoDate <= aYearPreviousToDate).Select(a => new { a.GatOther }).Sum(s => s.GatOther) ?? 0,
PreviousYearGrossSales = c.MemoMasters.Where(s => s.MemoDate >= aYearPreviousFromDate && s.MemoDate <= aYearPreviousToDate).Select(a => new { a.MemoCost }).Sum(s => (double?)s.MemoCost) ?? 0,
PreviousYearOpeningTotalBf = c.Payments.Where(s => s.AdjustmentBf == true && s.PaymentDate < aYearPreviousFromDate).Select(s => new { s.SSAmount }).Sum(s => (double?)s.SSAmount) ?? 0,
PreviousYearOpeningTotalPayments = c.Payments.Where(s => s.AdjustmentBf == false && s.PaymentDate < aYearPreviousFromDate).Select(a => new { a.SCAmount }).Sum(s => (double?)s.SCAmount) ?? 0,
PreviousYearOpeningTotalDiscounts = c.Payments.Where(s => s.PaymentDate < aYearPreviousFromDate).Select(a => new { a.SDiscount }).Sum(s => (double?)s.SDiscount) ?? 0,
PreviousYearTotalBf = c.Payments.Where(s => s.AdjustmentBf == true && s.PaymentDate >= aYearPreviousFromDate && s.PaymentDate <= aYearPreviousToDate).Select(s => new { s.SSAmount }).Sum(s => (double?)s.SSAmount) ?? 0,
PreviousYearTotalPayments = c.Payments.Where(s => s.AdjustmentBf == false && s.PaymentDate >= aYearPreviousFromDate && s.PaymentDate <= aYearPreviousToDate).Select(a => new { a.SCAmount }).Sum(s => (double?)s.SCAmount) ?? 0,
PreviousYearTotalDiscounts = c.Payments.Where(s => s.PaymentDate >= fromDate && s.PaymentDate <= aYearPreviousToDate).Select(a => new { a.SDiscount }).Sum(s => (double?)s.SDiscount) ?? 0,
//**Current Year
OpeningMemoDiscount = c.MemoMasters.Where(s => s.MemoDate < fromDate).Select(a => new { a.MemoDiscount }).Sum(s => s.MemoDiscount) ?? 0,
OpeningGatOther = c.MemoMasters.Where(s => s.MemoDate < fromDate).Select(a => new { a.GatOther }).Sum(s => s.GatOther) ?? 0,
OpeningGrossSales = c.MemoMasters.Where(s => s.MemoDate < fromDate).Select(a => new { a.MemoCost }).Sum(s => (double?)s.MemoCost) ?? 0,
Quantity = c.MemoMasters.Where(s => s.MemoDate >= fromDate && s.MemoDate <= toDate).Select(a => new { a.Quantity }).Sum(s => s.Quantity) ?? 0,
QuantityConverted = c.MemoMasters.Where(s => s.MemoDate >= fromDate && s.MemoDate <= toDate).Select(a => new { a.QuantityConverted }).Sum(s => s.QuantityConverted) ?? 0,
MemoDiscount = c.MemoMasters.Where(s => s.MemoDate >= fromDate && s.MemoDate <= toDate).Select(a => new { a.MemoDiscount }).Sum(s => s.MemoDiscount) ?? 0,
GatOther = c.MemoMasters.Where(s => s.MemoDate >= fromDate && s.MemoDate <= toDate).Select(a => new { a.GatOther }).Sum(s => s.GatOther) ?? 0,
GrossSales = c.MemoMasters.Where(s => s.MemoDate >= fromDate && s.MemoDate <= toDate).Select(a => new { a.MemoCost }).Sum(s => (double?)s.MemoCost) ?? 0,
OpeningTotalBf = c.Payments.Where(s => s.AdjustmentBf == true && s.PaymentDate < fromDate).Select(s => new { s.SSAmount }).Sum(s => (double?)s.SSAmount) ?? 0,
OpeningTotalPayments = c.Payments.Where(s => s.AdjustmentBf == false && s.PaymentDate < fromDate).Select(a => new { a.SCAmount }).Sum(s => (double?)s.SCAmount) ?? 0,
OpeningTotalDiscounts = c.Payments.Where(s => s.PaymentDate < fromDate).Select(a => new { a.SDiscount }).Sum(s => (double?)s.SDiscount) ?? 0,
TotalBf = c.Payments.Where(s => s.AdjustmentBf == true && s.PaymentDate >= fromDate && s.PaymentDate <= toDate).Select(s => new { s.SSAmount }).Sum(s => (double?)s.SSAmount) ?? 0,
TotalPayments = c.Payments.Where(s => s.AdjustmentBf == false && s.PaymentDate >= fromDate && s.PaymentDate <= toDate).Select(a => new { a.SCAmount }).Sum(s => (double?)s.SCAmount) ?? 0,
TotalDiscounts = c.Payments.Where(s => s.PaymentDate >= fromDate && s.PaymentDate <= toDate).Select(a => new { a.SDiscount }).Sum(s => (double?)s.SDiscount) ?? 0,
}).Where(c =>
(c.UnitId == unitId && c.CustomerName != "Cash Party") &&
(c.UnitId == unitId && c.CustomerName != "Cash Party PSC Islampur (Alomgir)") &&
(c.UnitId == unitId && c.CustomerName != "Cash Party Pakiza Print") &&
(c.UnitId == unitId && c.CustomerName != "Cash Party Pakiza Textile") &&
(c.UnitId == unitId && c.CustomerName != "Cash Party Pakiza Fabrics") &&
(c.UnitId == unitId && c.CustomerName != "Cash Party PSC Madhobdi (Alomgir)") &&
(c.UnitId == unitId && c.CustomerName != "Cash Party Pakiza Store") &&
(c.UnitId == unitId && c.CustomerName != "Cash Party PSC Islampur")
).ToList()
答案 0 :(得分：0)
好吧，我还有另一种方式来实现您的代码-无需深入linq语句。也许您会把它当作更好的解决方案。
您的带有字符串的列表（例如，放入您的班级中）：
private List<string> _list = new List<string>()
{
"Cash Party",
"Cash Party PSC Islampur (Alomgir)",
"Cash Party Pakiza Print",
"Cash Party Pakiza Textile",
"Cash Party Pakiza Fabrics",
"Cash Party PSC Madhobdi (Alomgir)",
"Cash Party Pakiza Store",
"Cash Party PSC Islampur"
};
创建一些不等式枚举（您需要它来对日期进行操作）：
public enum Inequality
{
Undefined = 0,
GreatherThan = 1,
GreatherOrEqualThan = 2,
LessThan = 3,
LessOrEqualThan = 4,
Equal = 5
}
实现的方法，该方法从您的属性返回总和的两倍（按日期过滤）：
/// <summary>
/// Return sum of property - filtered by dates and boolean
/// </summary>
/// <typeparam name="T">Type of data</typeparam>
/// <param name="data">Data collection</param>
/// <param name="datePropertyName">Name of date property to filter</param>
/// <param name="countPropertyName">Name of property which you want to sum</param>
/// <param name="booleanPropertyName">If filter have a some boolean restiction - put there this boolean property name</param>
/// <param name="booleanPropertyValue">If filter have a some boolean restiction - put there this boolean value to filter</param>
/// <param name="dateFrom">Your date from restiction</param>
/// <param name="inequalityFrom">Inequality 'from' sign to filter</param>
/// <param name="dateTo">Your date to restriction</param>
/// <param name="inequalityTo">Inequality 'to' sign to filter</param>
/// <returns>Sum of countPropertyName</returns>
public double GetFilteredCount<T>(List<T> data, string datePropertyName, string countPropertyName, string booleanPropertyName = null, bool? booleanPropertyValue = null, DateTime? dateFrom = null, Inequality inequalityFrom = Inequality.Undefined,
DateTime? dateTo = null, Inequality inequalityTo = Inequality.Undefined)
{
double? result = null;
var list = new List<T>(data);
if (list != null && list.Count > 0 && !String.IsNullOrEmpty(datePropertyName) && !String.IsNullOrEmpty(countPropertyName) && (inequalityFrom != Inequality.Undefined || inequalityTo != Inequality.Undefined))
{
list = list.Where(w =>
{
DateTime value = (DateTime)w.GetType().GetProperty(datePropertyName).GetValue(w);
return dateFrom.HasValue ?
(
inequalityFrom == Inequality.GreatherThan ? value > dateFrom :
inequalityFrom == Inequality.GreatherOrEqualThan ? value >= dateFrom :
inequalityFrom == Inequality.LessThan ? value < dateFrom :
inequalityFrom == Inequality.LessOrEqualThan ? value <= dateFrom :
inequalityFrom == Inequality.Equal ? value == dateFrom : true
) : true && dateTo.HasValue ?
(
inequalityTo == Inequality.GreatherThan ? value > dateTo :
inequalityTo == Inequality.GreatherOrEqualThan ? value >= dateTo :
inequalityTo == Inequality.LessThan ? value < dateTo :
inequalityTo == Inequality.LessOrEqualThan ? value <= dateTo :
inequalityTo == Inequality.Equal ? value == dateTo : true
) : true && !String.IsNullOrEmpty(booleanPropertyName) && booleanPropertyValue.HasValue ?
(
(bool)w.GetType().GetProperty(booleanPropertyName).GetValue(w) == booleanPropertyValue
) : true;
}).ToList<T>();
if (list != null && list.Count > 0)
{
result = list.Sum(s => (double?)s.GetType().GetProperty(countPropertyName).GetValue(s));
}
}
return result ?? 0;
}
以及最后一个-返回客户集合的主要方法：
public List<Customer> GetCustomersList(int unitId)
{
var result = new List<Customer>();
var data = db.Customers.Select(s => s).Where(w => w.UnitId == unitId && !_list.Contains(w.CustomerName));
if (data != null && data.Count > 0)
{
foreach (var row in data)
{
var customer = new Customer();
customer.UnitId = row.UnitId;
customer.CustomerId = row.CustomerId;
customer.MemoDate = row.MemoMasters.FirstOrDefault().MemoDate;
customer.CustomerName = row.CustomerName;
customer.SalesManName = row.SalesMan.SalesManName;
customer.SalesManagerName = row.SalesMan.SalesManager.SalesManagerName;
customer.DistrictName = row.Upazila.District.DistrictName;
// Previous Year
customer.PreviousYearOpeningMemoDiscount = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "MemoDiscount", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.LessThan);
customer.PreviousYearOpeningGatOther = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "GatOther", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.LessThan);
customer.PreviousYearOpeningGrossSales = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "MemoCost", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.LessThan);
customer.PreviousYearQuantity = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "Quantity", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: aYearPreviousToDate, inequalityTo: Inequality.LessOrEqualThan);
customer.PreviousYearQuantityConverted = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "QuantityConverted", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: aYearPreviousToDate, inequalityTo: Inequality.LessOrEqualThan);
customer.PreviousYearMemoDiscount = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "MemoDiscount", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: aYearPreviousToDate, inequalityTo: Inequality.LessOrEqualThan);
customer.PreviousYearGatOther = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "GatOther", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: aYearPreviousToDate, inequalityTo: Inequality.LessOrEqualThan);
customer.PreviousYearGrossSales = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "MemoCost", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: aYearPreviousToDate, inequalityTo: Inequality.LessOrEqualThan);
customer.PreviousYearOpeningTotalDiscounts = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SDiscount", dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.LessThan);
customer.PreviousYearOpeningTotalBf = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SSAmount", "AdjustmentBf", true, dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.LessThan);
customer.PreviousYearTotalBf = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SSAmount", "AdjustmentBf", true, dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: aYearPreviousToDate, inequalityTo: Inequality.LessOrEqualThan);
customer.PreviousYearOpeningTotalPayments = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SCAmount", "AdjustmentBf", false, dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.LessThan);
customer.PreviousYearTotalPayments = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SCAmount", "AdjustmentBf", false, dateFrom: aYearPreviousFromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: aYearPreviousToDate, inequalityTo: Inequality.LessOrEqualThan);
customer.PreviousYearTotalDiscounts = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SDiscount", dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: aYearPreviousToDate, inequalityTo: Inequality.LessOrEqualThan);
// Current Year
customer.OpeningMemoDiscount = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "MemoDiscount", dateFrom: fromDate, inequalityFrom: Inequality.LessThan);
customer.OpeningGatOther = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "GatOther", dateFrom: fromDate, inequalityFrom: Inequality.LessThan);
customer.OpeningGrossSales = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "MemoCost", dateFrom: fromDate, inequalityFrom: Inequality.LessThan);
customer.Quantity = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "Quantity", dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: toDate, inequalityTo: Inequality.LessOrEqualThan);
customer.QuantityConverted = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "QuantityConverted", dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: toDate, inequalityTo: Inequality.LessOrEqualThan);
customer.MemoDiscount = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "MemoDiscount", dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: toDate, inequalityTo: Inequality.LessOrEqualThan);
customer.GatOther = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "GatOther", dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: toDate, inequalityTo: Inequality.LessOrEqualThan);
customer.GrossSales = GetFilteredCount<MemoMasters>(row.MemoMasters, "MemoDate", "MemoCost", dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: toDate, inequalityTo: Inequality.LessOrEqualThan);
customer.OpeningTotalBf = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SSAmount", "AdjustmentBf", true, dateFrom: fromDate, inequalityFrom: Inequality.LessThan);
customer.OpeningTotalPayments = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SCAmount", "AdjustmentBf", false, dateFrom: fromDate, inequalityFrom: Inequality.LessThan);
customer.OpeningTotalDiscounts = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SDiscount", dateFrom: fromDate, inequalityFrom: Inequality.LessThan);
customer.TotalBf = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SSAmount", "AdjustmentBf", true, dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: toDate, inequalityTo: Inequality.LessOrEqualThan);
customer.TotalPayments = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SCAmount", "AdjustmentBf", false, dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: toDate, inequalityTo: Inequality.LessOrEqualThan);
customer.TotalDiscounts = GetFilteredCount<Payment>(row.Payments, "PaymentDate", "SDiscount", dateFrom: fromDate, inequalityFrom: Inequality.GreatherOrEqualThan, dateTo: toDate, inequalityTo: Inequality.LessOrEqualThan);
result.Add(customer);
}
}
return result;
}
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