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Posted 11 Oct 2013

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create LINQ to database in the .NET Compact Framework 3.5

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11 Oct 2013CPOL2 min read
Let see an example of using the database in LINQ and C#.netcf We will using classCustomer Here'ssome sample

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Let see an example of using the database in LINQ and C#.netcf


We will using classCustomer



some sample data:


using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Collections;

using System.Windows.Forms;

using System.Data.SqlClient;


namespace LINQ_test


public partial class FrmTest : Form


List < Customer > CustomerList;

Customer ObjCustomer ;

ArrayList Alist = new ArrayList ();

public class Customer




public string Code { get ; set ; }

public string Name { get ; set ; }

public string Gender { get ; set ; }

public string city { get ; set ; }

public string state { get ; set ; }

public string Type { get ; set ; }


public Form1()



CustomerList = new List < Customer >();

SqlConnection cn = new SqlConnection ( "Data Source =System1; Initial Catalog = dbCust; User ID = sa; Password= Pass123 " );

if (cn.State == ConnectionState .Closed) cn.Open();

SqlCommand objCommand = cn.CreateCommand();

objCommand.CommandType = CommandType .Text;

string StrQuery = "select * from Customer " ;

objCommand.CommandText = StrQuery;


DataSet ds = new DataSet ();

DataTable dt = new DataTable ();

SqlDataAdapter da = new SqlDataAdapter (objCommand);



for ( int i = 0; i < dt.Rows.Count; i++)


ObjCustomer = new Customer ();

ObjCustomer.Code = dt.Rows[i][ "Code" ].ToString();

ObjCustomer.Name = dt.Rows[i][ "Name" ].ToString();

ObjCustomer.Gender = dt.Rows[i][ "Gender" ].ToString(); = dt.Rows[i][ "city" ].ToString();

ObjCustomer.state = dt.Rows[i][ "state" ].ToString();

ObjCustomer.Type = dt.Rows[i][ "Type" ].ToString();








private void btnview_Click( object sender, EventArgs e)


var Seleccustomer= from p in CustomerList

where p.Name == "codeforum"


select p;


foreach ( var data in Seleccustomer)

Alist .Add(data);

dataGrid1.DataSource = Alist ;







This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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