ID Generator in C# using MS Access Database

Today I am going to show you how to generate id in C# using MS Access Database

Let’s start with create a new windows form. We need one Label, one TextBox one button and one GridView.

The code is shown below:

  1. using System;  
  2. using System.Collections.Generic;  
  3. using System.ComponentModel;  
  4. using System.Data;  
  5. using System.Drawing;  
  6. using System.Linq;  
  7. using System.Text;  
  8. using System.Windows.Forms;  
  9. using System.Data.OleDb;  
  10. namespace idgenerator  
  11. {  
  12.     public partial class Form1 : Form  
  13.     {  
  14.         OleDbConnection connectiondb = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\C# Cor\database\mydatabase.accdb;Persist Security Info=False");  
  15.         OleDbCommand com;  
  16.         string str;  
  17.         public Form1()  
  18.         {  
  19.             InitializeComponent();  
  20.             new_id();  
  21.             showdata();  
  22.         }  
  23.         private void Form1_Load(object sender, EventArgs e)  
  24.         {  
  25.         }  
  26.         private void new_id()  
  27.         {  
  28.             if (connectiondb.State == ConnectionState.Closed)  
  29.             {  
  30.                 connectiondb.Open();  
  31.             }  
  32.             str = "select max(admin_create_id) from tbl_user";  
  33.             com = new OleDbCommand(str, connectiondb);  
  34.             com.CommandType = CommandType.Text;  
  35.             Int32 max = (Int32)com.ExecuteScalar();  
  36.             label3.Text = (max + 1).ToString();  
  37.             connectiondb.Close();  
  38.         }  
  39.         private void button1_Click(object sender, EventArgs e)  
  40.         {  
  41.             if (connectiondb.State == ConnectionState.Closed)  
  42.             {  
  43.                 connectiondb.Open();  
  44.             }  
  45.             str = "insert into tbl_user (admin_create_id,sName) values (@admin_create_id,@sName)";  
  46.             com = new OleDbCommand(str, connectiondb);  
  47.             com.Parameters.AddWithValue("@admin_create_id", label3.Text);  
  48.             com.Parameters.AddWithValue("@sName", textBox2.Text);  
  49.             com.ExecuteNonQuery();  
  50.             connectiondb.Close();  
  51.             MessageBox.Show("Records Successfuly Inserted");  
  52.             showdata();  
  53.             new_id();  
  54.         }  
  55.         private void showdata()  
  56.         {  
  57.             if (connectiondb.State == ConnectionState.Closed)  
  58.             {  
  59.                 connectiondb.Open();  
  60.             }  
  61.             string strSql = "Select admin_create_id,sName from tbl_user";  
  62.             OleDbCommand cmd = new OleDbCommand(strSql, connectiondb);  
  63.             cmd.CommandType = CommandType.Text;  
  64.             OleDbDataAdapter da = new OleDbDataAdapter(cmd);  
  65.             DataTable dt = new DataTable();  
  66.             da.Fill(dt);  
  67.             dataGridView1.DataSource = dt;  
  68.             connectiondb.Close();  
  69.         }  
  70.     }  
  71. }  

Result
 
 
Thanks.!!
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