ITSourceCode.com

We Exist to Provide 100% Free Source Code and Tutorials

Custom Search

How to Load Data in the DataGridView in C# and SQL Server

LoadDataSQLDTGfig.3

In this tutorial, I will teach you how to load data in the DataGidView in C#.net and SQL server 2005. This method will help you retrieve data in the database to load those data in the DataGridview. You can also control whatever data you want to display to the DataGridView.

 

Let’s Begin:

 

Create a database and name it “persondb”.

After that, do the following query for creating a table in the database that you have created.

/****** Object: Table [dbo].[tblemployee] Script Date: 06/14/2016 15:29:49 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[tblemployee](
 [ID] [int] IDENTITY(1,1) NOT NULL,
 [Name] [nvarchar](50) NULL,
 [Address] [nvarchar](50) NULL,
 [Contact] [nvarchar](50) NULL,
 [Emailadd] [nvarchar](50) NULL,
 CONSTRAINT [PK_tblemployee] PRIMARY KEY CLUSTERED 
(
 [ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

Open Microsoft Visual Studio 2008 and create new Windows Form Application for C#. Then do the following design of a Form as shown below.

LoadDataSQLDTGfig.1

Go to the Solution Explorer, double click the “View Code”  to display the code editor.

LoadDataSQLDTGfig.2

In the code editor, declare all the classes and variables that are needed.

Note: Put using System.Data.SqlClient; above the namespace to access sql server library.

 //initialize all classes
 //initializes new instance 
 SqlConnection con = new SqlConnection();
 SqlDataAdapter da = new SqlDataAdapter();
 SqlCommand cmd = new SqlCommand(); 
 DataTable dt = new DataTable();
 //declare a variable
 string query;

After declaring the classes and variables, go back to the design view double click the form and establish a connection between SQL server and C#.net in the first load of the Form.

 private void Form1_Load(object sender, EventArgs e)
 {
 //set a connection between SQL server and Visual C#
 con.ConnectionString = "Data Source=.\\SQLEXPRESS;Database=persondb;trusted_connection=true;";
 }

Create a method for retrieving data in the database to be displayed in the datagridview.

 private void LoadData(string query, DataGridView dtg)
 {
 //opening connection
 con.Open();
 try
 {
 //initialize a new instance of sqlcommand
 cmd = new SqlCommand();
 //set a connection used by this instance of sqlcommand
 cmd.Connection = con;
 //set the sql statement to execute at the data source
 cmd.CommandText = query;
 //initialize a new instance of sqlDataAdapter
 da = new SqlDataAdapter();
 //set the sql statement or stored procedure to execute at the data source
 da.SelectCommand = cmd;
 //initialize a new instance of DataTable
 dt = new DataTable();
 //add or resfresh rows in the certain range in the datatable to match those in the data source.
 da.Fill(dt);
 //set the data source to display the data in the datagridview
 dtg.DataSource = dt;


 }
 catch (Exception ex)
 {
 //catching error 
 MessageBox.Show (ex.Message);
 }
 //release all resources used by the component
 da.Dispose();
 //clossing connection
 con.Close();
 }

After declaring the creating a method, go back to the design view double click the”Load” button.

private void button1_Click(object sender, EventArgs e)
 {
 //set a query for retrieving data in the database
 query = "Select ID,Name,Address,Contact as 'Contact No.',Emailadd as 'Email Address' FROM tblemployee";
 //calling a method for displaying data in the datagridview
 LoadData(query, dataGridView1);
 }

 

Output:

LoadDataSQLDTGfig.3

 

For all students who need programmer for your thesis system or anyone who needs a sourcecode in any programming languages. You can contact me @ :
Email – jannopalacios@gmail.com
Mobile No. – 09305235027 – tnt

 

Download Sourcecode

Facebook Comments

Check Your Domain Ranking

Leave a Reply

Your email address will not be published. Required fields are marked *

ITSourceCode.com © 2016 Frontier Theme

Subscribe For Latest Updates

Signup for our newsletter and get notified when we publish new articles for free!