LINQ to DataSet : DataSet « LINQ « C# / CSharp Tutorial

Home
C# / CSharp Tutorial
1.Language Basics
2.Data Type
3.Operator
4.Statement
5.String
6.struct
7.Class
8.Operator Overload
9.delegate
10.Attribute
11.Data Structure
12.Assembly
13.Date Time
14.Development
15.File Directory Stream
16.Preprocessing Directives
17.Regular Expression
18.Generic
19.Reflection
20.Thread
21.I18N Internationalization
22.LINQ
23.GUI Windows Forms
24.Windows Presentation Foundation
25.Windows Communication Foundation
26.Workflow
27.2D
28.Design Patterns
29.Windows
30.XML
31.XML LINQ
32.ADO.Net
33.Network
34.Directory Services
35.Security
36.unsafe
C# / C Sharp
C# / C Sharp by API
C# / CSharp Open Source
C# / CSharp Tutorial » LINQ » DataSet 
22.78.1.LINQ to DataSet
using System;
using System.Collections.Generic;
using System.Linq;
using System.Data;            
using System.Data.SqlClient; 
using System.Data.Linq;      
using System.Data.Common;
using System.Text;

    class Program
    {
        static void Main(string[] args)
        {
            SqlConnection thisConnection = new SqlConnection(
                @"Data Source=.\SQLEXPRESS;" +
                @"AttachDbFilename='NORTHWND.MDF';" +
                @"Integrated Security=True;Connect Timeout=30;User Instance=true");

            SqlDataAdapter thisAdapter = new SqlDataAdapter("SELECT CustomerID, CompanyName FROM Customers", thisConnection);

            SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);

            DataSet thisDataSet = new DataSet();

            SqlDataAdapter custAdapter = new SqlDataAdapter("SELECT * FROM Customers", thisConnection);
            SqlDataAdapter orderAdapter = new SqlDataAdapter("SELECT * FROM Orders", thisConnection);
            custAdapter.Fill(thisDataSet, "Customers");
            orderAdapter.Fill(thisDataSet, "Orders");

            DataRelation custOrderRel = thisDataSet.Relations.Add("CustOrders",
                 thisDataSet.Tables["Customers"].Columns["CustomerID"],
                 thisDataSet.Tables["Orders"].Columns["CustomerID"]);

            var customers = thisDataSet.Tables["Customers"].AsEnumerable();
            var orders = thisDataSet.Tables["Orders"].AsEnumerable();

            var preferredCustomers = from c in customers
                where c.GetChildRows("CustOrders").Length > 10
                select c;

            foreach (var customer in preferredCustomers)
            {
                Console.WriteLine(customer.GetChildRows("CustOrders").Length);
                Console.WriteLine(customer["CustomerID"]);
            }
            thisConnection.Close();
        }
    }
22.78.DataSet
22.78.1.LINQ to DataSet
22.78.2.Simple Linq to SQL
22.78.3.Linq To Sql
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.