How to dynamic increment using Dropdown list control with character

Hi Magesh,


Try this...


<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Dynamic_increment_using_Dropdown._Default" %>





   


   

   

                 Width="100px">
   

   
   

   
   

   

   
            Text="Insert Data" />

   
  
   
   
   
   





using System;
using System.Collections;
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;
namespace Dynamic_increment_using_Dropdown
{
    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)
            {
                DropDownList1.Items.Add("Select");
                SqlConnection con = new SqlConnection(strConnString);
                str = "select count(*) from employee";
                com = new SqlCommand(str, con);
                con.Open();
                count = Convert.ToInt16(com.ExecuteScalar()) + 1;
                DropDownList1.Items.Add("E00" + count);
                con.Close();
            }
           
        }

        protected void btn_insert_Click(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection(strConnString);
            con.Open();
            str = "insert into employee values('" + DropDownList1.SelectedItem.Text.Trim() + "','" + txt_empname.Text.Trim() + "'," + txt_sal.Text.Trim() + ")";
            com = new SqlCommand(str, con);
            com.ExecuteNonQuery();
            con.Close();
            Label4.Text = "Records successfully Inserted";
        }
    }
}



Thanks

Hi
   You can refer these articles:-
http://www.c-sharpcorner.com/UploadFile/mahesh/RandomNumber11232005010428AM/RandomNumber.aspx

http://stackoverflow.com/questions/3640174/generating-every-character-combination-up-to-a-certain-word-length