linq where statement with OR

I'm using linq-to-sql for a query like this: public static List<MyModel> GetData(int TheUserID, DateTime TheDate) using (MyDataContext TheDC = new MyDataContext()) { var TheOutput = from a in TheDC.MyTable where a.UserID == TheUserID (where a.Date1.Month == TheDate.Month && where a.Date1.Year == TheDate.Year) OR (where a.Date2.Month == TheDate.Month &

linq where语句与OR

我正在使用linq-to-sql进行如下查询: public static List<MyModel> GetData(int TheUserID, DateTime TheDate) using (MyDataContext TheDC = new MyDataContext()) { var TheOutput = from a in TheDC.MyTable where a.UserID == TheUserID (where a.Date1.Month == TheDate.Month && where a.Date1.Year == TheDate.Year) OR (where a.Date2.Month == TheDate.Month && where

linq groupby question

I have a table that has several columns: HarvestID, HarvestDate, UserID to mention the main ones. For each date, there are going to be several HarvestID per day. So far, I have the following linq query: TheUserID and TheMonth are passed in as an int and a DateTime var MyQuery = from h in MyDC.HarvestTable where h.UserID == TheUserID where h.HarvestDate.Month == T

linq groupby问题

我有一个表有几列:HarvestID,HarvestDate,UserID提到主要的。 对于每个日期,每天都会有几个HarvestID。 到目前为止,我有以下linq查询: UserID和TheMonth作为int和DateTime传入 var MyQuery = from h in MyDC.HarvestTable where h.UserID == TheUserID where h.HarvestDate.Month == TheMonth.Month where h.HarvestDate.Year == TheMonth.Year group h by

How to access count property of a dynamic type in C# 4.0?

I have the follow method that returns a dynamic object representing an IEnumerable<'a> ('a=anonymous type) : public dynamic GetReportFilesbyStoreProductID(int StoreProductID) { Report report = this.repository.GetReportByStoreProductID(StoreProductID); if (report == null || report.ReportFiles == null) { return null; } var

如何在C#4.0中访问动态类型的count属性?

我有以下方法返回一个代表IEnumerable<'a> ('a =匿名类型)的动态对象: public dynamic GetReportFilesbyStoreProductID(int StoreProductID) { Report report = this.repository.GetReportByStoreProductID(StoreProductID); if (report == null || report.ReportFiles == null) { return null; } var query = from x in report.ReportFiles

Wrapping a COM object/dynamic type in C#

I am currently working with COM objects in managed code and am using the new dynamic type for this. This works well in some areas but can be an issue in others. I was think about how I could get the best of both worlds, the flexibility of the dynamic type (late bound) with the support for say, an RCW (early bound) Somehow wrapping the dynamic type in a more manageable stucture. I was wonder

在C#中包装COM对象/动态类型

我目前正在使用托管代码中的COM对象,并使用新的动态类型。 这在一些领域运作良好,但可能成为其他领域的问题。 我一直在思考如何能够实现两全其美,动态类型(后期)的灵活性,支持说,RCW(早期) 以某种方式将动态类型包装成更易于管理的结构。 我想知道是否有一个首选的方法(如果它是一个好主意)或我应该考虑的事情。 我提出的两个基本思想如下: 首先,创建一个静态类,允许我以管理的方式调用动态类型的方法。

TFS2010: Retrieve all changesets associated with a branch (full recursion)

This follows my previous question about TFS 2010 and the possibility to create a changelog. I was previously using labels to identify a version of the program, but as labels are not fixed points in time, now I'm using branches. Here's how the branch hierarchy looks like: As you can see, there are two different applications that are branches of the trunk: APP_A (application A) and AP

TFS2010:检索与分支关联的所有变更集(完全递归)

这符合我之前关于TFS 2010的问题以及创建更新日志的可能性。 我以前使用标签来识别该程序的一个版本,但由于标签不是固定的时间点,现在我正在使用分支机构。 以下是分支层次结构的外观: 如您所见,有两个不同的应用程序是干线分支: APP_A (应用程序A)和APP_B (应用程序B)。 两者几乎完全相同,但有一些功能上的差异。 以下是创建应用程序的新版本的过程(比如版本1.3): Main trunk被修改(添加了新的功能,

How to (de)serialize a XmlException with Newtonsoft JSON?

This sample code: var json = JsonConvert.SerializeObject(new XmlException("bla")); var exception = JsonConvert.DeserializeObject<XmlException>(json); throws an InvalidCastException in Newtonsoft.Json.dll: Unable to cast object of type 'Newtonsoft.Json.Linq.JValue' to type 'System.String' with the following stack trace: at System.Xml.XmlException..ctor(SerializationInfo in

如何使用Newtonsoft JSON序列化XmlException?

此示例代码: var json = JsonConvert.SerializeObject(new XmlException("bla")); var exception = JsonConvert.DeserializeObject<XmlException>(json); 在Newtonsoft.Json.dll中引发InvalidCastException:无法强制类型为'Newtonsoft.Json.Linq.JValue'的对象使用以下堆栈跟踪键入'System.String': at System.Xml.XmlException..ctor(SerializationInfo info, StreamingContext context) at Void .c

How can I create a bootable CD image with my kernel?

I have a kernel, to boot I am using command qemu-system-i386 -kernel kernel.bin . Is any way to create bootable disk image to boot with qemu-system-i386 -cdrom CD.iso ? The code I am compiling in linux with these commands: nasm -f elf32 kernel.asm -o kernelasm.o gcc -m32 -c kernel.c -o kernelc.o ld -m elf_i386 -T link.ld -o kernel.bin kernelasm.o kernelc.o and then booting with qemu-system-i

我如何用我的内核创建可启动的CD映像?

我有一个内核,启动我使用命令qemu-system-i386 -kernel kernel.bin 。 有什么办法可以创建可启动的磁盘映像以启动与qemu-system-i386 -cdrom CD.iso ? 我正在用这些命令在Linux中编译代码: nasm -f elf32 kernel.asm -o kernelasm.o gcc -m32 -c kernel.c -o kernelc.o ld -m elf_i386 -T link.ld -o kernel.bin kernelasm.o kernelc.o 然后用qemu-system-i386 -kernel kernel.bin 代码:kernel.asm: [BITS 32] SECTI

Does Java Allow Direct Memory Access

I know C# allows you to use pointers in the unsafe context. But does Java have some similar memory access method? Java does not have pointers (for good reasons), so if there is a similar memory access method, what would it be exactly? Well, there is a sun.misc.Unsafe class. It allows direct memory access, so you can implement some magic like reinterpret casts and so on. The thing is you ne

Java是否允许直接内存访问?

我知道C#允许你在unsafe上下文中使用指针。 但是Java有一些类似的内存访问方法吗? Java没有指针(出于很好的理由),所以如果有类似的内存访问方法,它会是什么? 那么,有一个sun.misc.Unsafe类。 它允许直接内存访问,所以你可以实现一些魔法,如重新演绎演员等等。 问题是你需要使用hacky的反射方法来获取实例,并且这个类没有真正的文档记录。 一般来说,在生产代码中使用这种工具需要非常好的理由。 以下是一个

C pointer to array/array of pointers disambiguation

What is the difference between the following declarations: int* arr1[8]; int (*arr2)[8]; int *(arr3[8]); What is the general rule for understanding more complex declarations? int* arr[8]; // An array of int pointers. int (*arr)[8]; // A pointer to an array of integers The third one is same as the first. The general rule is operator precedence. It can get even much more complex as function

指向数组/指针消除歧义数组的C指针

以下声明有什么区别: int* arr1[8]; int (*arr2)[8]; int *(arr3[8]); 理解更复杂的声明的一般规则是什么? int* arr[8]; // An array of int pointers. int (*arr)[8]; // A pointer to an array of integers 第三个与第一个相同。 一般规则是运营商优先。 随着函数指针进入图片,它可能变得更加复杂。 按照K&R的建议使用cdecl程序。 $ cdecl Type `help' or `?' for help cdecl> explain int* arr1[8]; declare

What's the difference between a pointer, and a pointer variable?

I know this is very basic but it is little bit confusing to me. I've read: a pointer is nothing more than an address , and a pointer variable is just a variable that can store an address . When we store the address of a variable i in the pointer variable p , we say that p points to i . int i, *p = &i; p points to i . To gain access to the object that a pointer points to, we use

指针和指针变量有什么区别?

我知道这是非常基本的,但对我来说有点混乱。 我读了: 指针不过是一个地址 , 指针变量只是一个可以存储地址的变量。 当我们将变量i的地址存储在指针变量p ,我们说p 指向 i 。 int i, *p = &i; p指向i 。 为了访问指针指向的对象,我们使用* (间接)运算符。 如果p 是一个指针,那么*p表示p当前指向的对象。 现在我很困惑,我该怎么称呼p 指针或指针变量 ? 额外: 指针总是和地址一样吗? 指针值和指