linq

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How to merge 5 different type of linq queries into one based on a column

I am really confused on a report I need. As of today, most of my reports were simple, so I was able to do them myself easily. But being a newbie in sql/dlinq, I cannot find my way through the followin[详细]

2023-04-12 07:01 分类：问答
Embed a test for null in a single LINQ expression

Let\'s start with a simple example class: public class Foo { public DateTime Date { get; set; } public decimal Price { get; set; }[详细]

2023-04-12 06:17 分类：问答
How do I query an integer column for "starts with" in Entity Framework?

I have a co开发者_如何转开发lumn that\'s defined as an integer in EF (Code First).I want to search it using \"starts with.\" Now, I can do this:[详细]

2023-04-12 05:22 分类：问答
Cleaner way to convert collection into another type?

I have a control, RadT开发者_如何转开发abStrip, which contains: public RadTabCollection Tabs { get; }. The class RadTabCollection inherits from: public class RadTabCollection : ControlItemCollection,[详细]

2023-04-12 05:20 分类：问答
How to do datatemplate for items in listbox?

I have an XML file (see below) and can display all the Product Names in a listbox. I want each entry in the listbox to display Product Name followed by Price, not just Product Name.[详细]

2023-04-12 04:54 分类：问答
Linq Split function Query

I\'ve a csv file that contains the records below: Col1,Col2,Col3 \"Test,Test1\",1,3 And I\'ve Linq query below which splits the 开发者_如何学Gocsv to XML document. However, for given example ab[详细]

2023-04-12 04:37 分类：问答
how to use count on a groupby using extension methods?

I need to use get count(*) like sql server on linq, how can I use extenstion methods to do that ? here is what I am trying to do[详细]

2023-04-12 04:37 分类：问答
How do I convert a DBQuery<> (or ObjectQuery<>) to a non-collection primitive type (ie: int, string)

var lastitem = Contacts .OrderByDescending(c => c.ContactID) .Take(1).Select(p=>p.ContactID); lastitem is even though a single item returns a DBQuery<Int32>[详细]

2023-04-12 03:50 分类：问答
LINQ what is the best pratice to create db manager class?

What is the best performance and consistency? Variant one (inherit from DataContext): public class MyDbManager : DataContext[详细]

2023-04-12 03:20 分类：问答
Java LINQ -like functionality [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: LINQ for Java tool In C# there is a capability to use LINQ statements in order to access a Collection as if[详细]

2023-04-12 03:14 分类：问答