C# 如何为Visual Studio优化此LINQ查询?
我有一个庞大复杂的LINQ到SQL查询,我需要以某种方式进行优化,因为后台C#编译器完全占用了CPU,我无法在Visual Studio 2010中正常键入或编辑我的C# 如何为Visual Studio优化此LINQ查询?,c#,.net,wpf,linq,performance,C#,.net,Wpf,Linq,Performance,我有一个庞大复杂的LINQ到SQL查询,我需要以某种方式进行优化,因为后台C#编译器完全占用了CPU,我无法在Visual Studio 2010中正常键入或编辑我的.cs文件(每个字母,尤其是如果IntelliSense想要弹出,都会严重滞后) 罪魁祸首是: var custFVC = (from cfvc in customer.CustomerFrameVariationCategories let lastValue = cfvc.CustomerFrameVariat
.cs
文件(每个字母,尤其是如果IntelliSense想要弹出,都会严重滞后)
罪魁祸首是:
var custFVC =
(from cfvc in customer.CustomerFrameVariationCategories
let lastValue = cfvc.CustomerFrameVariationCategoryValueChanges.Where(cfvcvc => cfvcvc.ChangeDateTime <= this.SelectedDateTime).OrderByDescending(cfvcvc2 => cfvcvc2.ChangeDateTime).FirstOrDefault() ?? new CustomerFrameVariationCategoryValueChange()
let lastValue2 = cfvc.FrameVariationCategory.FrameVariation.Frame.FrameValueChanges.Where(fvc => fvc.ChangeDateTime <= this.SelectedDateTime).OrderByDescending(fvc2 => fvc2.ChangeDateTime).FirstOrDefault() ?? new FrameValueChange()
let lastValue3 = cfvc.FrameVariationCategory.FrameVariationCategoryValueChanges.Where(fvcvc => fvcvc.ChangeDateTime <= this.SelectedDateTime).OrderByDescending(fvcvc2 => fvcvc2.ChangeDateTime).FirstOrDefault() ?? new FrameVariationCategoryValueChange()
let lastValue4 = cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Any(fvm => (fvm.FrameModule.FrameModuleValueChanges.Where(fmvc => fmvc.ChangeDateTime <= this.SelectedDateTime).OrderByDescending(fmvc2 => fmvc2.ChangeDateTime).FirstOrDefault() ?? new FrameModuleValueChange()).IsActive == false)
where lastValue.IsActive == true
orderby cfvc.FrameVariationCategory.FrameVariation.Frame.Name, cfvc.FrameVariationCategory.Category.Name, cfvc.FrameVariationCategory.FrameVariation.Name
select new
{
cfvc.Id,
cfvc.FrameVariationCategory,
lastValue.CoverCoefficient,
lastValue.NeiserNet,
PlywoodName = lastValue2.Plywood.Name,
FrameIsActive = lastValue2.IsActive,
OwnCost = cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Sum(fvm => // sum all frame variation modules
(lastValue4 ? 0 : fvm.FrameModule.FrameModuleValueChanges.Where(fmvc => fmvc.ChangeDateTime <= this.SelectedDateTime) // if module not active then 0
.OrderByDescending(fmvc2 => fmvc2.ChangeDateTime).FirstOrDefault().Porolone) + // otherwise get Porolone
fvm.FrameModule.FrameModuleComponents.Sum(fmc => // add to Porolone sum of all module components
(fmc.Article.ArticleDetails.Any() ? fmc.Article.ArticleDetails.Sum(ad => // if any article details then use A*L*W*T instead of Amount
WindowExcel.MultiplyArticleDetailValues(ad.ArticleDetailValueChanges.Where(advc => advc.ChangeDateTime <= this.SelectedDateTime)
.OrderByDescending(advc2 => advc2.ChangeDateTime).FirstOrDefault() ?? new ArticleDetailValueChange())) :
WindowExcel.GetModuleComponentAmount(fmc.FrameModuleComponentValueChanges.Where(fmcvc => fmcvc.ChangeDateTime <= this.SelectedDateTime) // no details = get amount
.OrderByDescending(fmcvc2 => fmcvc2.ChangeDateTime).FirstOrDefault() ?? new FrameModuleComponentValueChange())) * // times article values
WindowExcel.MultiplyArticleValues(fmc.Article.ArticleValueChanges.Where(avc => avc.ChangeDateTime <= this.SelectedDateTime)
.OrderByDescending(avc2 => avc2.ChangeDateTime).FirstOrDefault() ?? new ArticleValueChange()))),
Cubes = cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Sum(fvm => (fvm.FrameModule.FrameModuleValueChanges.Where(fmvc => fmvc.ChangeDateTime <= this.SelectedDateTime && fmvc.IsActive == true).OrderByDescending(fmvc2 => fmvc2.ChangeDateTime).FirstOrDefault() ?? new FrameModuleValueChange()).Cubes),
lastValue3.CoverNet,
lastValue3.CoverGarbage,
lastValue3.CoverGross,
lastValue3.CoverPrice,
lastValue3.BackgroundNet,
lastValue3.BackgroundGarbage,
lastValue3.BackgroundGross,
lastValue3.BackgroundPrice,
FVCIsActive = lastValue3.IsActive,
FrameModuleAnyNonActive = lastValue4
}).ToList();
var custFVC=
(来自customer.CustomerFrameVariationCategories中的cfvc)
让lastValue=cfvc.CustomerFrameVariationCategoryValueChanges.Where(cfvcvc=>cfvcvc.ChangeDateTime CFVC2.ChangeDateTime).FirstOrDefault()??新建CustomerFrameVariationCategoryValueChange()
让lastValue2=cfvc.FrameVariationCategory.FrameVariation.Frame.FrameValueChanges.Where(fvc=>fvc.ChangeDateTime fvc2.ChangeDateTime).FirstOrDefault()
让lastValue3=cfvc.FrameVariationCategory.FrameVariationCategoryValueChanges.Where(fvcvc=>fvcvc.ChangeDateTime FVCC2.ChangeDateTime).FirstOrDefault()??新的FrameVariationCategoryValueChange()
让lastValue4=cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Any(fvm=>(fvm.FrameModule.FrameModuleValueChanges.Where(fmvc=>fmvc.ChangeDateTime fmvc2.ChangeDateTime)。FirstOrDefault()?new FrameModuleValueChange())。IsActive==false)
其中lastValue.IsActive==true
orderby cfvc.FrameVariationCategory.FrameVariation.Frame.Name、cfvc.FrameVariationCategory.Category.Name、cfvc.FrameVariationCategory.FrameVariation.Name
选择新的
{
cfvc.Id,
cfvc.FrameVariationCategory,
lastValue.Covercovercient,
lastValue.NeiserNet,
PlywoodName=lastValue2.collate.Name,
FrameIsActive=lastValue2.IsActive,
OwnCost=cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Sum(fvm=>//对所有帧变量模块求和
(lastValue4?0:fvm.FrameModule.FrameModuleValueChanges.Where(fmvc=>fmvc.ChangeDateTime fmvc2.ChangeDateTime).FirstOrDefault().Porolone)+//否则获取Porolone
fvm.FrameModule.FrameModuleComponents.Sum(fmc=>//添加到所有模块组件的Porolone和中
(fmc.Article.ArticleDetails.Any()?fmc.Article.ArticleDetails.Sum(ad=>//如果有任何文章详细信息,则使用*L*W*T代替金额
WindowExcel.MultiplyArticleDetailValueChanges(ad.ArticleDetailValueChanges.Where(advc=>advc.ChangeDateTime advc2.ChangeDateTime).FirstOrDefault()??new-ArticleDetailValueChange()):
WindowExcel.GetModuleComponentAmount(fmc.FrameModuleComponentValueChanges.Where(fmcvc=>fmcvc.ChangeDateTime fmcvc2.ChangeDateTime).FirstOrDefault()?new FrameModuleComponentValueChange())*//次文章值
WindowExcel.MultiplyArticleValues(fmc.Article.ArticleValueChanges.Where(avc=>avc.ChangeDateTime avc2.ChangeDateTime).FirstOrDefault()??new ArticleValueChange()),
多维数据集=cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Sum(fvm=>(fvm.FrameModule.FrameModuleValueChanges.Where(fmvc=>fmvc.ChangeDateTime fmvc2.ChangeDateTime).FirstOrDefault()??new FrameModuleValueChange()).Cubes),
lastValue3.CoverNet,
lastValue3.CoverGarage,
lastValue3.CoverGross,
lastValue3.CoverPrice,
lastValue3.BackgroundNet,
lastValue3.background垃圾,
lastValue3.BackgroundGross,
lastValue3.背景价格,
FVCIsActive=lastValue3.IsActive,
FrameModuleAnyNonActive=lastValue4
}).ToList();
这里最大的问题是OwnCost
,VisualStudio之前和之后的一切都可以处理。我不想关闭后台编译(在实际编译之前检查编译时错误的功能),我不想创建存储过程。我无法将此代码分离到单独的类/方法中,因为无法传递LINQ DataContext(据我所知,还需要考虑上下文变量位于using
语句中)
我唯一模糊的想法是某种扩展方法,或返回LINQ查询的方法或类似的方法。因为我不知道我能在这里做些什么来纠正这个问题,我不知道如何制定措辞,因此我不能谷歌它
如何将
OwnCost
或整个查询从当前.cs
文件中移出(或优化),或者将其拆分为同一文件中的一个方法(可能有助于后台编译器)或“其他内容”…?不用将LINQ写入SQL,您可以为此编写一个存储过程来完成所有这些事情。我对C编译器中的代价没有任何内在的了解。然而,当我查看您的查询时,有两件事会跳出来
let
绑定的数量和复杂性OwnCost
成员的初始值设定项的复杂性我能给出的最好建议是尝试将查询分解,以便将这些查询分解成单独的语句,希望这能减轻编译器的压力。将其分解。这是VS试图处理的一个大型表达式树。您可以将其分解,以便在LINQ to对象中发生一些SELECT子句转换。这将使后台编译器更容易处理。只需获得:
var custFVC = (from cfvc in customer.CustomerFrameVariationCategories
let lastValue = cfvc.CustomerFrameVariationCategoryValueChanges.Where(cfvcvc => cfvcvc.ChangeDateTime <= this.SelectedDateTime).OrderByDescending(cfvcvc2 => cfvcvc2.ChangeDateTime).FirstOrDefault() ?? new CustomerFrameVariationCategoryValueChange()
let lastValue2 = cfvc.FrameVariationCategory.FrameVariation.Frame.FrameValueChanges.Where(fvc => fvc.ChangeDateTime <= this.SelectedDateTime).OrderByDescending(fvc2 => fvc2.ChangeDateTime).FirstOrDefault() ?? new FrameValueChange()
let lastValue3 = cfvc.FrameVariationCategory.FrameVariationCategoryValueChanges.Where(fvcvc => fvcvc.ChangeDateTime <= this.SelectedDateTime).OrderByDescending(fvcvc2 => fvcvc2.ChangeDateTime).FirstOrDefault() ?? new FrameVariationCategoryValueChange()
let lastValue4 = cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Any(fvm => (fvm.FrameModule.FrameModuleValueChanges.Where(fmvc => fmvc.ChangeDateTime <= this.SelectedDateTime).OrderByDescending(fmvc2 => fmvc2.ChangeDateTime).FirstOrDefault() ?? new FrameModuleValueChange()).IsActive == false)
where lastValue.IsActive == true
orderby cfvc.FrameVariationCategory.FrameVariation.Frame.Name, cfvc.FrameVariationCategory.Category.Name, cfvc.FrameVariationCategory.FrameVariation.Name
select new
{ cfvc, lastValue, lastValue1, lastValue2, lastValue3}).ToList();
var custFVC=(来自customer.CustomerFrameVariationCategories中的cfvc
让lastValue=cfvc.CustomerFrameVariationCategoryValueChanges.Where(cfvcvc=>cfvcvc.ChangeDateTime CFVC2.ChangeDateTime).FirstOrDefault()??新建CustomerFrameVariationCategoryValueChange()
让lastValue2=cfvc.FrameVariationCategory.FrameVariation.Frame.FrameValueChanges.Where(fvc=>fvc.ChangeDateTime fvc2.ChangeDateTime).FirstOrDefault()
设lastValue3=cfvc.FrameVariationCategory.FrameVariati
OwnCost = cfvc.Select(CalculateOwnCost)
public decimal CalculateOwnCost(CustomerFrameVariationCategory cvfc)
{
return cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Sum(fvm => // sum all frame variation modules
(lastValue4 ? 0 : fvm.FrameModule.FrameModuleValueChanges.Where(fmvc => fmvc.ChangeDateTime <= this.SelectedDateTime) // if module not active then 0
.OrderByDescending(fmvc2 => fmvc2.ChangeDateTime).FirstOrDefault().Porolone) + // otherwise get Porolone
fvm.FrameModule.FrameModuleComponents.Sum(fmc => // add to Porolone sum of all module components
(fmc.Article.ArticleDetails.Any() ? fmc.Article.ArticleDetails.Sum(ad => // if any article details then use A*L*W*T instead of Amount
WindowExcel.MultiplyArticleDetailValues(ad.ArticleDetailValueChanges.Where(advc => advc.ChangeDateTime <= this.SelectedDateTime)
.OrderByDescending(advc2 => advc2.ChangeDateTime).FirstOrDefault() ?? new ArticleDetailValueChange())) :
WindowExcel.GetModuleComponentAmount(fmc.FrameModuleComponentValueChanges.Where(fmcvc => fmcvc.ChangeDateTime <= this.SelectedDateTime) // no details = get amount
.OrderByDescending(fmcvc2 => fmcvc2.ChangeDateTime).FirstOrDefault() ?? new FrameModuleComponentValueChange())) * // times article values
WindowExcel.MultiplyArticleValues(fmc.Article.ArticleValueChanges.Where(avc => avc.ChangeDateTime <= this.SelectedDateTime)
.OrderByDescending(avc2 => avc2.ChangeDateTime).FirstOrDefault() ?? new ArticleValueChange()))),
Cubes = cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Sum(fvm => (fvm.FrameModule.FrameModuleValueChanges.Where(fmvc => fmvc.ChangeDateTime <= this.SelectedDateTime && fmvc.IsActive == true).OrderByDescending(fmvc2 => fmvc2.ChangeDateTime).FirstOrDefault() ?? new FrameModuleValueChange()).Cubes)
}
OwnCost = cfvc.Select(x => CalculateOwnCost(x))
public partial class WindowExcel
{
private static decimal GetOwnCost(CustomerFrameVariationCategory cfvc, bool frameModuleAnyNonActive, DateTime selectedDateTime)
{
return cfvc.FrameVariationCategory.FrameVariation.FrameVariationModules.Sum(fvm => // sum all frame variation modules
(frameModuleAnyNonActive ? 0 : fvm.FrameModule.FrameModuleValueChanges.Where(fmvc => fmvc.ChangeDateTime <= selectedDateTime) // if module not active then 0
.OrderByDescending(fmvc2 => fmvc2.ChangeDateTime).FirstOrDefault().Porolone) + // otherwise get Porolone
fvm.FrameModule.FrameModuleComponents.Sum(fmc => // add to Porolone sum of all module components
(fmc.Article.ArticleDetails.Any() ? fmc.Article.ArticleDetails.Sum(ad => // if any article details then use A*L*W*T instead of Amount
WindowExcel.MultiplyArticleDetailValues(ad.ArticleDetailValueChanges.Where(advc => advc.ChangeDateTime <= selectedDateTime)
.OrderByDescending(advc2 => advc2.ChangeDateTime).FirstOrDefault() ?? new ArticleDetailValueChange())) :
WindowExcel.GetModuleComponentAmount(fmc.FrameModuleComponentValueChanges.Where(fmcvc => fmcvc.ChangeDateTime <= selectedDateTime) // no details = get amount
.OrderByDescending(fmcvc2 => fmcvc2.ChangeDateTime).FirstOrDefault() ?? new FrameModuleComponentValueChange())) * // times article values
WindowExcel.MultiplyArticleValues(fmc.Article.ArticleValueChanges.Where(avc => avc.ChangeDateTime <= selectedDateTime)
.OrderByDescending(avc2 => avc2.ChangeDateTime).FirstOrDefault() ?? new ArticleValueChange())));
}
}
OwnCost = WindowExcel.GetOwnCost(cfvc, lastValue4, this.SelectedDateTime)