Tutorial for new developers in Asp.net - connectivity with Sql server for ( vb & C#) and fill the Datagrid or Gridview .

When anyone starts newly development using ASP.net this is very helpful tutorial for connectivity with SQL Server.

1. STEP 1[b]

Import following namespaces[]/b] in codebehind page
VB :
imports System.data
imports System.data.sqlclient
C# :
using System.data;
using System.data.sqlclient;

2. STEP 2

Create Your Connection string
Example: Data Source=[Database Server Name];Initial Catalog=[Database Name];User ID=[Database Access UserID];Password=[Database Password]

Declare One Variable and Store above connection string in it Like below
VB :
Dim strConnectionString As String = "connection string here"
C# :
string strConnectionString = "connection string here";

3. STEP 3

Declare connection string object
VB:
Dim cnn As New SqlConnection(strConnectionString)
C# :
SqlConnection cnn = new SqlConnection(strConnectionString);

4. STEP 4

Declare SQL command object and provide in query from database which you want to display in datagrid and initialize it with connection object
VB:
Dim cmd As SqlClient.SqlCommand = New SqlClient.SqlCommand("SELECT * FROM table ", cnn)
C# :
SqlClient.SqlCommand cmd = new SqlClient.SqlCommand("SELECT * FROM table ", cnn);

5. STEP 5

Set commandType to sqlcommand object. As we have given Text set it to text ( If we provide storeprocedure name set it to storeprocedure)
VB:
cmd.CommandType = CommandType.Text
C# :
cmd.CommandType = CommandType.Text;

6. STEP 6

Declare DataAdapter object and initialize with command object
VB:
Dim dacmd As New SqlClient.SqlDataAdapter(cmd)
C# :
SqlClient.SqlDataAdapter dacmd = new SqlClient.SqlDataAdapter(cmd);

7. STEP 7

Declare Dataset object and fill the data from datadapter
VB:
Dim dscmd As New DataSet
dacmd.Fill(dscmd)
C# :
DataSet dscmd = new DataSet();
dacmd.Fill(dscmd);

8. STEP 8

Finally, Set the dataset to Datagrid
VB:
Datagrid1.DataSource = dsContract.Tables(0)
Datagrid1.DataBind()
C# :
Datagrid1.DataSource = dsContract.Tables(0);
Datagrid1.DataBind();

VB :
                       
                          Dim strConnectionString As String = "connetion string here"
                          Dim cnn As New SqlConnection(strConnectionString)
                          Dim cmd As SqlClient.SqlCommand = New SqlClient.SqlCommand("SELECT * FROM table ", cnn)
                          cmd.CommandType = CommandType.Text
                          Dim dacmd As New SqlClient.SqlDataAdapter(cmd)
                          Dim dscmd As New DataSet
                          dacmd.Fill(dscmd)
                          Datagrid1.DataSource = dsContract.Tables(0)
                          Datagrid1.DataBind()
                       
                       
                      C#:
                       
                       
                      { 
                          string strConnectionString = "connetion string here"; 
                          SqlConnection cnn = new SqlConnection(strConnectionString); 
                          SqlClient.SqlCommand cmd = new SqlClient.SqlCommand("SELECT * FROM table ", cnn); 
                          cmd.CommandType = CommandType.Text; 
                          SqlClient.SqlDataAdapter dacmd = new SqlClient.SqlDataAdapter(cmd); 
                          DataSet dscmd = new DataSet(); 
                          dacmd.Fill(dscmd); 
                          Datagrid1.DataSource = dsContract.Tables(0); 
                          Datagrid1.DataBind(); 
                      }

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