
c#的一个修改密码的程序
写了一个c#修改密码的程序,但是跳出了成功更新密码的框但是数据库的资料未被改写求指点if(maskedTextBox3.Text==maskedTextBox2.Text...
写了一个c#修改密码的程序,但是跳出了成功更新密码的框但是数据库的资料未被改写求指点 if (maskedTextBox3.Text == maskedTextBox2.Text) { string userName = this.textBox1.Text.ToString(); string userPwd = this.maskedTextBox1.Text.ToString(); string newPwd = this.maskedTextBox2.Text.ToString(); SqlConnection conn = new SqlConnection("server=localhost;database=internet;uid=sa;pwd=lovlng0802;"); conn.Open(); SqlCommand cmd = new SqlCommand("select count(*) from login where username='" + userName + "'and password='" + userPwd + "'",conn); int count = Convert.ToInt32(cmd.ExecuteScalar()); if (count > 0) { SqlCommand update = new SqlCommand("update login set password='" + newPwd + "'where username = '" + userName + "'", conn); MessageBox.Show("密码更新完毕"); } else { MessageBox.Show("账户或密码错误"); } } else { MessageBox.Show("重复密码错误"); } } } }
conn.Open(); SqlCommand cmd = new SqlCommand("select count(*) from login where username='" + userName + "'and password='" + userPwd + "'",conn);
int count = Convert.ToInt32(cmd.ExecuteScalar());
if (count > 0)
{
SqlCommand update = new SqlCommand("update login set password='" + newPwd + "'where username = '" + userName + "'", conn);
MessageBox.Show("密码更新完毕");
} 展开
conn.Open(); SqlCommand cmd = new SqlCommand("select count(*) from login where username='" + userName + "'and password='" + userPwd + "'",conn);
int count = Convert.ToInt32(cmd.ExecuteScalar());
if (count > 0)
{
SqlCommand update = new SqlCommand("update login set password='" + newPwd + "'where username = '" + userName + "'", conn);
MessageBox.Show("密码更新完毕");
} 展开
2个回答
展开全部
if (count > 0)
{
SqlCommand update = new SqlCommand("update login set password='" + newPwd + "'where username = '" + userName + "'", conn);
MessageBox.Show("密码更新完毕");
}//这里的代码貌似有问题啊
数据库执行修改的操作咧?update.ExecuteNonQuery()没写?没写完整吧?
{
SqlCommand update = new SqlCommand("update login set password='" + newPwd + "'where username = '" + userName + "'", conn);
MessageBox.Show("密码更新完毕");
}//这里的代码貌似有问题啊
数据库执行修改的操作咧?update.ExecuteNonQuery()没写?没写完整吧?
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