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AuthorQuestion
Asp.text EmpID Automatic generation
Posted By Sathish Pabbathi on 08 May 2013
Hi,
In my application i have empid column,,,in that id should come as max(empid)+1  from database automatically,my database is sql server can u plz suggest the query for my problem,,,


Thanx in Advance,


Regards,
Sathish Pabbathi

AuthorReply
Re: Asp.text EmpID Automatic generation
Posted By Satyapriya Nayak on 08 May 2013  
<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/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="EmpId" Font-Bold="True" Width="100px"></asp:Label>
    <asp:TextBox ID="txt_empid" runat="server"></asp:TextBox><br />
    <asp:Label ID="Label2" runat="server" Text="EmpName" Font-Bold="True" Width="100px"></asp:Label>
    <asp:TextBox ID="txt_empname" runat="server"></asp:TextBox><br />
    <asp:Label ID="Label3" runat="server" Text="Salary" Font-Bold="True" Width="100px"></asp:Label>
    <asp:TextBox ID="txt_sal" runat="server"></asp:TextBox><br />
    </div>
   
    <asp:Button ID="btn_insert" runat="server" onclick="btn_insert_Click"
        Text="Insert Data" /><br />
    <asp:Label ID="Label4" runat="server"></asp:Label>
  
 
    </form>
</body>
</html>




using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
    string strConnString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
    string str;
    SqlCommand com;
    int count;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            autogenerated();
          
        }
    }

    void autogenerated()
    {
        SqlConnection con = new SqlConnection(strConnString);
        str = "select count(*) from employee";
        com = new SqlCommand(str, con);
        con.Open();
        count = Convert.ToInt16(com.ExecuteScalar()) + 1;
        txt_empid.Text = count.ToString();
        txt_empid.Enabled = false;
        con.Close();
    }
    protected void btn_insert_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection(strConnString);
        con.Open();
        str = "insert into employee values('" + txt_empid.Text.Trim() + "','" + txt_empname.Text.Trim() + "'," + txt_sal.Text.Trim() + ")";
        com = new SqlCommand(str, con);
        com.ExecuteNonQuery();
        con.Close();
        Label4.Text = "Records successfully Inserted";
        txt_empname.Text = "";
        txt_sal.Text = "";
        autogenerated();
    }
}


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