private void Reg_Form_Load(object sender, EventArgs e)
{
lab_title.Text = this.Text + " - " + lab_title.Text;
try
{
SQL_Class.getcon(); //连接数据库
}
catch
{
//当连接数据库失败时，显示错误信息
MessageBox.Show("数据库连接失败！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
this.Close(); //关闭窗口
}
switch (Form_Type)
{
case 0:
break;
case 1:
LoadInfo();
break;
case 2:
break;
}
}
private void Login_Form_Load(object sender, EventArgs e)
{
lab_title.Text = this.Text + " - " + lab_title.Text;
try
{
SQL_Class.getcon(); //连接数据库
}
catch
{
//当连接数据库失败时，显示错误信息
MessageBox.Show("数据库连接失败！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
Application.Exit(); //关闭整个工程
}
}
private void txt_username_Leave(object sender, EventArgs e)
{
if (!Input_Regex.IsNumAndEnCh(txt_username.Text) || txt_username.Text == "")
{
lab_m_username.Text = "请输入正确的登陆用户名！";
lab_m_username.ForeColor = Color.Red;
}
else
{
SQL_Class SQLClass = new SQL_Class();
SqlDataReader dr = SQLClass.getcom("select * from yezhu where username = '******'");
bool ifcom = dr.Read();
if (ifcom)
{
lab_m_username.Text = "登陆用户名已存在！";
lab_m_username.ForeColor = Color.Red;
}
else
{
lab_m_username.Text = "";
}
}
}