LINQ to Objects:可以查询是实现了Ienumerable或Ienumerable<T>的集合,即任意可枚举的集合。 LINQ to ADO.NET: LINQ to SQL:可查询基于关系型数据库的数据,并进行CRUD等操作。 LINQ to DataSet:对DataSet对象进行检索/过滤/排序等操作。 LINQ to XML:可对XML结构数据进行
using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace software_test { public partial class FrmTest : Form { public FrmTest() { InitializeComponent(); } private void btnOk_Click( object sender, EventArgs e) { string numbera = ...
using System.Configuration; 配置命名空间,包含应用程序配置相关的类比如ConfigurationManager using System.Data; 数据命名空间,包含ado.net最基础的类型,比如DbConnection等 using System.Linq; 3.5引入的linq语法需要提供的支持类,主要包含了Enumerable扩展方法支持类 using System.Web; asp.net所需要的核心命名空间,包含...
using System; using System.Linq; using System.Text; using System.Data.Linq; using System.Security.Cryptography; namespace Run { class Program { static void Main(string[] args) { try { Console.WriteLine("\nBegin test automation using LINQ"); string connString = "server=(local);data...
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using System.Text;using System.Data.Linq.Mapping;using System.Data.Linq;using System.Data.SqlClient;#region Table, Support classes and DataContext classes// Here we are saying that the class Record maps to the datbase table Records[Table(Name = "Records")]...
using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System....
using System; using System.Web; using System.Collections.Generic; using System.ServiceModel.Web; using System.Linq; using System.Data.Services; using NorthwindModel; namespace SimpleDataService { public class Northwind : DataService<NorthwindEntities> { public static void InitializeService(IDataServiceCon...
using System.Linq;using System.Text;using System.Xml.Linq;using Microsoft.Examples.LtxOpenXml;using DocumentFormat.OpenXml.Packaging;class Heading{public string StyleName { get; set; }public string Text { get; set; }public int HeadingLevel { get; set; }}...
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Data; using System.Data.Common; using Microsoft.EntityFrameworkCore; public static class DbContextExtensions { /* * need Microsoft.EntityFrameworkCore Microsoft.EntityFrameworkCore.Relational */ public stat...