To see another approach to querying data stored in Excel tables, check out Eric White'sUsing LINQ to Query Excel Tablesblog post. It provides sample code that includes a set of extension methods and classes that allow queries to be performed against Excel tables using LINQ in a manner that is similar to querying a SQL database...
using(varconnection=newMySqlConnection(connectionString)){// 连接到数据库connection.Open();// 创建LINQ查询varquery=fromitemincontext.TableNameselectitem;// 添加IN条件varvalues=newList<string>{"value1","value2","value3"};query=query.Where(item=>values.Contains(item.ColumnName));// 执行查询var...
在LINQ中,您可以使用Lambda表达式来执行IN或CONTAINS操作。以下是一个示例,展示了如何使用Lambda表达式在LINQ查询中执行IN或CONTAINS操作: 代码语言:csharp 复制 usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;classProgram{staticvoidMain(){// 示例数据List<int>numbers=newList<int>{1,2,3,4,5}...
by using LINQ query expressions instead of XPath or XQuery. LINQ to XML is a new in-memory XML programming API that uses modern programming constructs instead of the W3C Document Object Model (DOM). For more information, seeLINQ to XML vs. DOM,LINQ to XML, andLINQ to XML Classes ...
NOTE:(安装linq时要求安装的是vs的英文版否则将无法识别,还有就是得安装vs2005 sp1,其实个人觉得倒不如直接安装vs2008算了。 LINQ (.Net Language Integrated Query) is the general-purpose standard query operators that allow traversal, filter and projection operations to be expressed in a direct yet declar...
在C中,如何利用Linq对实体集合进行筛选,获取符合一组值的元素?C# Linq获取实体查询中列表元素的in是指在使用LINQ查询时,通过使用in关键字来筛选实体列表中的元素。 具体来说,in关键字可以用于筛选一个实体属性的值是否在一个给定的列表中。以下是一个示例代码: ...
C# LINQ Wherelast modified February 1, 2024 In this article we show how to filter sequences in C# using LINQ's Where method and where clause. Language-Integrated Query (LINQ) is a domain-specific language for querying data from various data sources, including arrays, lists, XML files, or ...
Debug di query di LINQ to DataSet Sicurezza Esempi di LINQ to DataSet Entity Data Model Oracle e ADO.NET ADO.NET Entity Framework SQL Server e ADO.NET Oggetti DataSet, DataTable e DataView C# Leggere in inglese Salva Aggiungi a raccolte ...
The analogous way would be insertrs into a temporary table.With that in mind one can rewrite the query with the IN operator using an equi-join. As far as I remember, LINQ-2-SQL was able to transform a query likevar matches = from person in people join name in names...
Learn how types of variables in a LINQ query relate to each other. LINQ query operations are strongly typed in the data source, in the query, and in execution.