public partial class FormSignup : Form
{
SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\USER\source\repos\ProjectV2\ProjectV2\Account.mdf;Integrated Security=True");
SqlCommand cmd;
int ID = 0;
public FormSignup()
{
InitializeComponent();
}
private void btnSignup_Click(object sender, EventArgs e)
{
con.Open();
cmd = new SqlCommand("select * from Account where Name='" + txtName.Text + "' and Password ='" + txtPassword.Text + "'", con);
SqlDataReader rd = cmd.ExecuteReader();
if (rd.HasRows)
{
MessageBox.Show("A account with this Name has been registered. Please try select another username.");
con.Close();
ClearData();
return;
}
if (txtPassword.Text != txtRetypePassword.Text)
{
MessageBox.Show("Please re-enter password.");
con.Close();
ClearData();
return;
}
if (txtName.Text != "" && txtPassword.Text != "" && txtContactNumber.Text != "" && txtAddress.Text != "")
{
cmd = new SqlCommand("insert into Account(Name,Password,ContactNumber,Address) values(@name,@password,@contactnumber,@address)", con);
con.Open();
cmd.Parameters.AddWithValue("@name", txtName.Text);
cmd.Parameters.AddWithValue("@password", txtPassword.Text);
cmd.Parameters.AddWithValue("@contactnumber", txtContactNumber.Text);
cmd.Parameters.AddWithValue("@address", txtAddress.Text);
con.Close();
cmd.ExecuteNonQuery();
MessageBox.Show("Record Inserted Successfully");
ClearData();
}
else
{
MessageBox.Show("Please Provide All Deatails!");
}
}
答案 0 :(得分:0)
尝试一下:
private void btnSignup_Click(object sender, EventArgs e)
{
using (con = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\USER\source\repos\ProjectV2\ProjectV2\Account.mdf;Integrated Security=True")
{
con.Open();
...
}
}