How do i increment a number using c# after i have saved it into the database

george wambui

Hi team,

Am having the following the code in c# and i want to increment the number through text box, so when i save the number it should increment automatically, and also when i open the web page again after i have closed it, it should retrieve the previous number which i saved in the database last.

Here is the code:

using System;
using System.Collections;
using System.Configuration;
using System.Data;
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.Data.Odbc;

public partial class staffcode : System.Web.UI.Page
{
            int num = 001;
            OdbcCommand cmd;
            OdbcConnection conn = new OdbcConnection("dsn=parcel;uid=dba;pwd=sql");

    protected void Page_Load(object sender, EventArgs e)
    {
        //if (!Page.IsPostBack)
        //{
        //}

     //getLastID();
        }
protected void Btnsave_Click(object sender, EventArgs e)
    {
           OdbcCommand cmd;
            OdbcConnection conn = new OdbcConnection("dsn=parcel;uid=dba;pwd=sql");
            conn.Open();
            cmd = new OdbcCommand("insert into tbl_staffcode(staffcode,fullname,desgination) values ('" +      Txtcode.Text + "','" + txtname.Text + "','" + DropDownList1.Text + "')", conn);

            //if (System.Windows.Forms.MessageBox.Show("confrim the data", "prompt", System.Windows.Forms.MessageBoxButtons.YesNo, System.Windows.Forms.MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes)
            cmd.ExecuteNonQuery();
insert();
            conn.Close();
}
    private void insert()
{

    string count = Txtcode.Text;
    if (count.Length == 000)
    {
        Txtcode.Text = "001";
    }
    else
    {
        int count1 = Convert.ToUInt16(count);
        int countAdd = count1 + 001;
        Txtcode.Text = countAdd.ToString();
    }
}

Regards
George

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Satyapriya Nayak14y ago
Hi George,

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

    Untitled Page

















            Text="Insert Data" />






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();
    }
}

Thanks
0
Jignesh Trivedi14y ago
hi,

try following code in else loop

int count1 = Convert.ToUInt16(count);
int countAdd = count1 + 001;
Txtcode.Text = countAdd.ToString().PadLeft(3, '0');

hope this will help you.
0