C#聯合數據庫完成驗證辨認ID卡內容的辦法。本站提示廣大學習愛好者:(C#聯合數據庫完成驗證辨認ID卡內容的辦法)文章只能為提供參考,不一定能成為您想要的結果。以下是C#聯合數據庫完成驗證辨認ID卡內容的辦法正文
本文所述實例為C#聯合數據庫,來驗證所辨認的ID卡內容,經由過程本實例代碼,用戶可以輕松完成對ID卡會員信息的驗證。該實例代碼可完成讀取數據庫,進而慢慢完成數據庫銜接,數據庫讀取,ID卡讀取,ID卡信息與數據庫內容比對,終究前往成果並告之能否驗證勝利。
詳細功效代碼以下:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.OleDb; using System.Runtime.InteropServices; using System.Diagnostics; using System.Collections; namespace IDCard { public partial class Form1 : Form { public Form1() { InitializeComponent(); } public delegate int HookProc(int nCode, int wParam, IntPtr lParam); static int hHook = 0; public const int WH_KEYBOARD_LL = 13; //LowLevel鍵盤截獲,假如是WH_KEYBOARD=2,其實不能對體系鍵盤截取,Acrobat Reader會在你截取之前取得鍵盤。 HookProc KeyBoardHookProcedure; [DllImport("kernel32")] public static extern int Beep(int dwFreq, int dwDuration);//讓盤算機蜂鳴 string DataPath = "";//數據庫途徑 OleDbConnection con;//OleDbConnection對象,銜接數據庫 OleDbCommand cmd;//OleDbCommand對象,履行SQL語句 //鍵盤Hook構造函數 [StructLayout(LayoutKind.Sequential)] public class KeyBoardHookStruct { public int vkCode; public int scanCode; public int flags; public int time; public int dwExtraInfo; } [DllImport("user32.dll")] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] //抽失落鉤子 public static extern bool UnhookWindowsHookEx(int idHook); [DllImport("user32.dll")] //挪用下一個鉤子 public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam); [DllImport("kernel32.dll")] public static extern IntPtr GetModuleHandle(string name); public string getNum(string code) { string flag = ""; switch (code) { case "048": flag="0"; break; case "049": flag = "1"; break; case "050": flag = "2"; break; case "051": flag = "3"; break; case "052": flag = "4"; break; case "053": flag = "5"; break; case "054": flag = "6"; break; case "055": flag = "7"; break; case "056": flag = "8"; break; case "057": flag = "9"; break; } return flag; } public void Hook_Start() { // 裝置鍵盤鉤子 if (hHook == 0) { KeyBoardHookProcedure = new HookProc(KeyBoardHookProc); hHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyBoardHookProcedure, GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0); //假如設置鉤子掉敗. if (hHook == 0) { Hook_Clear(); } } } //撤消鉤子事宜 public void Hook_Clear() { bool retKeyboard = true; if (hHook != 0) { retKeyboard = UnhookWindowsHookEx(hHook); hHook = 0; } //假如去失落鉤子掉敗. if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed."); } //這裡可以添加本身想要的信息處置 string NumCode=""; public int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam) { if (nCode >= 0) { if (wParam == 0x0104 || wParam == 0x0100) { KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct)); int flag = kbh.vkCode; switch (flag) { case 96: NumCode += "0"; break; case 97: NumCode += "1"; break; case 98: NumCode += "2"; break; case 99: NumCode += "3"; break; case 100: NumCode += "4"; break; case 101: NumCode += "5"; break; case 102: NumCode += "6"; break; case 103: NumCode += "7"; break; case 104: NumCode += "8"; break; case 105: NumCode += "9"; break; } if (flag == 13) { if (NumCode.Length != 0) { string c = ""; string id = ""; for (int i = 0; i <= NumCode.Length - 3; i += 3) { string b = NumCode.Substring(i, 3); c += getNum(b); } id = c; if (id.Length == 8)//假如卡號為8位 { //實例化OleDbConnection對象 con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + DataPath); con.Open();//翻開數據庫銜接 //實例化OleDbCommand對象,依據ID卡號檢索數據表 cmd = new OleDbCommand("select * from tb_UserInfo where CardID='" + id + "'", con); OleDbDataReader sdr = cmd.ExecuteReader();//實例化OleDbDataReader對象 sdr.Read();//讀取記載 txtShowCardID.Text = id;//獲得ID卡號 txtShowName.Text = sdr["UName"].ToString();//獲得員工姓名 cbbShowSex.Text = sdr["USex"].ToString();//獲得員工性別 cbbShowDep.Text = sdr["UDep"].ToString();//獲得員工部分 con.Close();//封閉數據庫銜接 Beep(3000, 100);//盤算機蜂鳴 } NumCode = ""; } } } } return CallNextHookEx(hHook, nCode, wParam, lParam); } private void Form1_Load(object sender, EventArgs e) { cbbdep.SelectedIndex = 0;//設置部分下拉框的第一項被選中 cbbsex.SelectedIndex = 0;//設置性別下拉框的第一項被選中 //獲得數據庫途徑 DataPath = Application.StartupPath.ToString(); DataPath = DataPath.Substring(0, DataPath.LastIndexOf("\\")); DataPath = DataPath.Substring(0, DataPath.LastIndexOf("\\")); DataPath += @"\db.mdb"; } private void radioButton1_CheckedChanged(object sender, EventArgs e) { if (radioButton1.Checked) { groupBox1.Enabled = true; Hook_Clear(); } } private void radioButton2_CheckedChanged(object sender, EventArgs e) { if (radioButton2.Checked) { groupBox1.Enabled = false; Hook_Start(); } } private void button2_Click(object sender, EventArgs e) { txtIdcard.Text = ""; txtName.Text = ""; } private void button1_Click(object sender, EventArgs e) { if (txtIdcard.Text == "" || txtName.Text == "")//假如沒有輸出ID卡號和員工姓名 { //彈出正告信息 if (MessageBox.Show("請將數據填寫完全!", "正告", MessageBoxButtons.OK, MessageBoxIcon.Error) == DialogResult.OK) { if (txtIdcard.Text == "")//假如沒有輸出ID卡號 txtIdcard.Focus();//則光標處在輸出ID卡號的文本框 if (txtName.Text == "")//假如沒有輸出員工姓名 txtName.Focus();//則光標處在輸出員工姓名的文本框 if (txtIdcard.Text == "" && txtName.Text == "")//假如都沒輸出數據 txtIdcard.Focus();//則光標處在輸出ID卡號的文本框 } } else//假如輸出了數據 { if (txtIdcard.Text.Trim().Length != 8)//假如輸出的ID卡號不是8位 { //彈出正告信息 if (MessageBox.Show("ID卡號必需為8位!", "正告", MessageBoxButtons.OK, MessageBoxIcon.Error) == DialogResult.OK) { txtIdcard.Text = "";//清空輸出ID卡號的文本框 txtIdcard.Focus();//讓光標處在輸出ID卡號的文本框上 } } else//假如輸出的ID卡號為8位 { //實例化OleDbConnection對象 con=new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + DataPath); con.Open();//翻開銜接 //實例化OleDbCommand對象 cmd = new OleDbCommand("select count(*) from tb_UserInfo where CardID='"+txtIdcard.Text.Trim()+"'", con); int flag =Convert.ToInt32(cmd.ExecuteScalar());//斷定能否曾經添加過此ID卡號 if (flag > 0)//假如年夜於0則解釋曾經添加過 { //彈出正告信息 if (MessageBox.Show("ID卡號曾經添加過了!", "正告", MessageBoxButtons.OK, MessageBoxIcon.Error) == DialogResult.OK) { button2_Click(sender, e);//清空輸出ID卡號和員工姓名的文本框 } } else//假如小於0解釋沒有添加過 { //實例化OleDbCommand對象 cmd = new OleDbCommand("insert into tb_UserInfo(CardID,UName,USex,UDep) values ('" + txtIdcard.Text.Trim() + "','" + txtName.Text.Trim() + "','" + cbbsex.Text.Trim() + "','" + cbbdep.Text.Trim() + "')", con); int k = cmd.ExecuteNonQuery();//履行insert語句,將輸出的信息添加到數據庫中 if (k > 0)//假如年夜於0則操作勝利 { //彈出提醒信息 if (MessageBox.Show("添加勝利!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Information) == DialogResult.OK) { button2_Click(sender, e);//清空輸出ID卡號和員工姓名的文本框 } } } con.Close();//封閉數據庫銜接 } } } private void txtIdcard_KeyPress(object sender, KeyPressEventArgs e) { if (!(e.KeyChar <= '9' && e.KeyChar >= '0') && e.KeyChar != '\r' && e.KeyChar != '\b') { e.Handled = true; } } } }
該實例正文完美,便於浏覽,讀者還可以依據本身需求改良代碼,或許添加新的功效以知足本身運用的特性化需求。