When data exist update if data not exist insert to database

Satyapriya Nayak
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when exist update if not exist inse

In this blog we will know if data is present in the database then update the data, or if the data does not exits in database then insert it to the database.

Create a table employee as below.

Create table employee (eid varchar(50)primary key,ename varchar(50))

Create a stored procedure display as below.

ALTER PROCEDURE dbo.display
@eid varchar(50),
@ename varchar(50)

IF EXISTS (SELECT * FROM employee WHERE eid = @eid)

BEGIN

update employee set ename=@ename where eid=@eid

END

ELSE

BEGIN

insert employee(eid,ename) values (@eid,@ename)

END

Default.aspx code

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default"
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml
/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <asp:Label ID="Label1" runat="server" Text="Eid" Width="50px"></asp:Label>
    <asp:TextBox ID="txtUserId" runat="server" Width="197px"></asp:TextBox><br />
    <asp:Label ID="Label2" runat="server" Text="Ename" Width="50px"></asp:Label>
    <asp:TextBox ID="txtUserName" runat="server" Width="197px"></asp:TextBox>
<asp:GridView ID="GridView1" runat="server">
    </asp:GridView>
    <br />
    <asp:Button ID="btn1" runat="server" Text="Insert" onclick="btn1_Click" />
    </div>
    </form>
</body>
</html>

Default.aspx.vb code

Imports System.Data
Imports System.Data.SqlClient
Partial Class _Default
    Inherits System.Web.UI.Page
    Dim strConnString As String =
System.Configuration.ConfigurationManager.ConnectionStrings.Item("ConnectionString").ToString()
    Dim sqlda As SqlDataAdapter
    Dim com As SqlCommand
    Dim str As String
    Dim ds As DataSet
    Dim con As New SqlConnection(strConnString)
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not IsPostBack Then
            bindgrid()
        End If
    End Sub
    Sub bindgrid()
        con.Open()
        str = "select * from employee"
        com = New SqlCommand(str, con)
        ds = New DataSet()
        sqlda = New SqlDataAdapter(com)
        sqlda.Fill(ds, "employee")
        GridView1.DataSource = ds
        GridView1.DataMember = "employee"
        GridView1.DataBind()
        con.Close()
    End Sub
    Protected Sub btn1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles
btn1.Click
        con.Open()
        com = New SqlCommand("display", con)
        com.Parameters.Add("@eid", SqlDbType.VarChar).Value = txtUserId.Text
        com.Parameters.Add("@ename", SqlDbType.VarChar).Value = txtUserName.Text
        com.CommandType = CommandType.StoredProcedure
        com.ExecuteNonQuery()
        con.Close()
        bindgrid()
    End Sub
End Class