Login窗体代码:
namespace WindowsForms
{
public partial class Login : Form
{
//记录用户登录次数
private int nLoginCount = 0;
//记录用户登录基本信息
private XT_YHXX yhxx = null;
private DataTable dt_yhxx = null;
//用户信息操作类
private XT_YHXX_DAO yhxxDAO = null; public Login(XT_YHXX yhxx)
{
InitializeComponent();
this.yhxx = yhxx;
yhxxDAO = new XT_YHXX_DAO();
} #region 登陆系统事件
private void But_Login_Click(object sender, EventArgs e)
{
if (!check())
{
this.textBox_yhgh.Focus();
return;
}
dt_yhxx = yhxxDAO.SelectByYHGHYHMM(Convert.ToInt32(this.textBox_yhgh.Text), this.textBox_yhmm.Text);
if (dt_yhxx.Rows.Count > 0)
{
yhxx.Yhxh = Convert.ToInt32(dt_yhxx.Rows[0]["yhxh"]);
yhxx.Yhgh = Convert.ToInt32(this.textBox_yhgh.Text);
yhxx.Yhmc = dt_yhxx.Rows[0]["yhmc"].ToString();
yhxx.Ksdm = Convert.ToInt32(dt_yhxx.Rows[0]["ksdm"]);
yhxx.Pydm = dt_yhxx.Rows[0]["pydm"].ToString();
yhxx.Wbdm = dt_yhxx.Rows[0]["wbdm"].ToString();
yhxx.Yhmm = this.textBox_yhmm.Text;
yhxx.Yhqx = Convert.ToInt32(dt_yhxx.Rows[0]["yhqx"]);
yhxx.Yksb = 0;
this.DialogResult = DialogResult.OK;
}
else
{
nLoginCount++;
if (nLoginCount == 3)
{
this.DialogResult = DialogResult.Cancel;
MessageBox.Show("登录次数超出上限,请重新打开系统!");
}
else
{
MessageBox.Show("用户名密码输入错误!");
return;
}
}
}
#endregion #region 取消登陆系统事件
private void But_cancel_Click(object sender, EventArgs e)
{
this.DialogResult = DialogResult.Cancel;
}
#endregion #region 用户关闭窗口时触发事件
private void Login_FormClosing(object sender, FormClosingEventArgs e)
{
if (this.DialogResult != DialogResult.Cancel && this.DialogResult != DialogResult.OK)
e.Cancel = true;
}
#endregion #region 对用户输入登录信息进行验证
private bool check()
{
if (string.IsNullOrEmpty(this.textBox_yhgh.Text))
{
MessageBox.Show("请输入用户名", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return false;
}
if (string.IsNullOrEmpty(this.textBox_yhmm.Text))
{
MessageBox.Show("请输入密码", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return false;
}
return true;
}
#endregion
}
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~程序入口:
namespace WindowsForms
{
static class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
XT_YHXX yhxx = new XT_YHXX();
Login login = new Login(yhxx);
if (login.ShowDialog()==DialogResult.OK)
{
login.Close();
Application.Run(new Main(yhxx));
}
}
}
}
namespace WindowsForms
{
public partial class Login : Form
{
//记录用户登录次数
private int nLoginCount = 0;
//记录用户登录基本信息
private XT_YHXX yhxx = null;
private DataTable dt_yhxx = null;
//用户信息操作类
private XT_YHXX_DAO yhxxDAO = null; public Login(XT_YHXX yhxx)
{
InitializeComponent();
this.yhxx = yhxx;
yhxxDAO = new XT_YHXX_DAO();
} #region 登陆系统事件
private void But_Login_Click(object sender, EventArgs e)
{
if (!check())
{
this.textBox_yhgh.Focus();
return;
}
dt_yhxx = yhxxDAO.SelectByYHGHYHMM(Convert.ToInt32(this.textBox_yhgh.Text), this.textBox_yhmm.Text);
if (dt_yhxx.Rows.Count > 0)
{
yhxx.Yhxh = Convert.ToInt32(dt_yhxx.Rows[0]["yhxh"]);
yhxx.Yhgh = Convert.ToInt32(this.textBox_yhgh.Text);
yhxx.Yhmc = dt_yhxx.Rows[0]["yhmc"].ToString();
yhxx.Ksdm = Convert.ToInt32(dt_yhxx.Rows[0]["ksdm"]);
yhxx.Pydm = dt_yhxx.Rows[0]["pydm"].ToString();
yhxx.Wbdm = dt_yhxx.Rows[0]["wbdm"].ToString();
yhxx.Yhmm = this.textBox_yhmm.Text;
yhxx.Yhqx = Convert.ToInt32(dt_yhxx.Rows[0]["yhqx"]);
yhxx.Yksb = 0;
this.DialogResult = DialogResult.OK;
}
else
{
nLoginCount++;
if (nLoginCount == 3)
{
this.DialogResult = DialogResult.Cancel;
MessageBox.Show("登录次数超出上限,请重新打开系统!");
}
else
{
MessageBox.Show("用户名密码输入错误!");
return;
}
}
}
#endregion #region 取消登陆系统事件
private void But_cancel_Click(object sender, EventArgs e)
{
this.DialogResult = DialogResult.Cancel;
}
#endregion #region 用户关闭窗口时触发事件
private void Login_FormClosing(object sender, FormClosingEventArgs e)
{
if (this.DialogResult != DialogResult.Cancel && this.DialogResult != DialogResult.OK)
e.Cancel = true;
}
#endregion #region 对用户输入登录信息进行验证
private bool check()
{
if (string.IsNullOrEmpty(this.textBox_yhgh.Text))
{
MessageBox.Show("请输入用户名", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return false;
}
if (string.IsNullOrEmpty(this.textBox_yhmm.Text))
{
MessageBox.Show("请输入密码", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return false;
}
return true;
}
#endregion
}
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~程序入口:
namespace WindowsForms
{
static class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
XT_YHXX yhxx = new XT_YHXX();
Login login = new Login(yhxx);
if (login.ShowDialog()==DialogResult.OK)
{
login.Close();
Application.Run(new Main(yhxx));
}
}
}
}
if (nLoginCount == 3)
{
MessageBox.Show("登录次数超出上限,请重新打开系统!");
this.DialogResult = DialogResult.Cancel;
}
else
{
MessageBox.Show("用户名密码输入错误!");
this.DialogResult = System.Windows.Forms.DialogResult.None;
return;
}