linq

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property remove from the list

Remove property from a list NorthwindDataContext db = new NorthwindDataContext(); List<CategorySml> oList = new List<CategorySml>();[详细]

2023-04-11 17:19 分类：问答
Linq inside of Linq causing sequence to return no results

Here are my classes: public class XDetail { public string Name { get; set; } public int ID { get; set; } }[详细]

2023-04-11 16:44 分类：问答
Unable to Cast() generic dictionary item to DictionaryEntry when enumerated via non-generic IDictionary

I have some code that iterates over a non-generic IDictionary by first calling the LINQ Cast method. However I get an invalid cast exception when passing a generic dictionary implementation even thoug[详细]

2023-04-11 14:23 分类：问答
Comparing 2 lists using Linq

I have 2 lists I am trying to compare. I execute the following and I get a false value returned: var areIdentical = list1.SequenceEq开发者_如何转开发ual(list2, myFileCompare);[详细]

2023-04-11 13:55 分类：问答
How to combine rows using LINQ?

Say I have an entity with following properties [Id, UserName, ProductName], where Id is the PK, and other fields are not unique, so the rows with same UserName repeat multiple times.[详细]

2023-04-11 13:51 分类：问答
Entity Framework multi table query

I need guidance with what I think is a complex Entity Framework 4.1 table query. An item has a开发者_运维百科 list of associated Identities.A user then has a list of Identities that can be selected[详细]

2023-04-11 13:19 分类：问答
Null reference in lambda max count

Public Class Inventory Public Property Productcode As String Public Property lstattribute As List(Of Attribute)[详细]

2023-04-11 13:05 分类：问答
Querying M:M relationships using Entity Framework

How would I modify the following code: var result = from p in Cache.Model.Products from f in p.Flavours[详细]

2023-04-11 12:39 分类：问答
how to convert the bool to nullable bool (bool?)

i have a table 开发者_高级运维provider with column implied(tiny int)(something like nullable bool)[详细]

2023-04-11 12:38 分类：问答
What means Distinct in LINQ?

I have the following Dim query = From city In myCountry.Cities From street In city.Streets Sel开发者_运维百科ect New StreetInfo With {.Name = street.Name, .Index = street.Index}[详细]

2023-04-11 11:29 分类：问答