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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

This articles was originally at wiki.asp.net but has now been given a new home on CodeProject. Editing rights for this article has been set at Bronze or above, so please go in and edit and update this article to keep it fresh and relevant.

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

 

We will using classCustomer

 

Here's

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()

{

InitializeComponent();

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;

objCommand.Prepare();

DataSet ds = new DataSet ();

DataTable dt = new DataTable ();

SqlDataAdapter da = new SqlDataAdapter (objCommand);

da.Fill(dt);

 

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();

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

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

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

CustomerList.Add(ObjCustomer);

}

 

 

}

 

 

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 ;

 

 

}

}

}

License

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

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The ASP.NET Wiki was started by Scott Hanselman in February of 2008. The idea is that folks spend a lot of time trolling the blogs, googlinglive-searching for answers to common "How To" questions. There's piles of fantastic community-created and MSFT-created content out there, but if it's not found by a search engine and the right combination of keywords, it's often lost.

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