so, I'm trying to make a login form but I'm facing an error.. It doesn't continue, it shows only no data (the error message I've put if the username or password is incorrect, even tho I;ve set them correct)
this is my code
SqlConnection conn = new SqlConnection("Data Source=BRZAP\\MSSQLSERVERBTK; Initial Catalog=BrzAP; Integrated Security=True;");
try
{
conn.Close();
conn.Open();
SqlCommand cmd = new SqlCommand(@"SELECT id,d_username,d_password FROM t_Login
WHERE d_username=@usr AND
d_password=@pw", conn);
cmd.Parameters.AddWithValue("@usr", txtUID.ToString());
cmd.Parameters.AddWithValue("@pw", txtP.ToString());
SqlDataReader reader = cmd.ExecuteReader();
if (reader.Read())
{
MessageBox.Show(reader["d_username"].ToString());
}
else
{
MessageBox.Show("no data");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
conn.Close();
}
finally
{
conn.Close();
}
bellow is a pic of the data I have in sql. pic with data
Use txtUID.Text
and txtP.Text
instead of txtUID.ToString()
and txtP.ToString()
:
cmd.Parameters.AddWithValue("@usr", txtUID.Text);
cmd.Parameters.AddWithValue("@pw", txtP.Text);
The Text
property gives you the actual value in the text box. But when you call .ToString()
on a TextBox
control, you will get something like:
System.Windows.Controls.Textbox
This means that the parameter will always be incorrect.
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