❔ many to many database cant update the 3rd table
cant update the 3rd table who had the cust id and drink id
A
Angius•509d ago
You're not doing any updating in those screenshots, so that's probably why nothing gets updated
H
hercules_x_x•509d ago
i already did but when i take the screen shot i was empety
A
Angius•509d ago
Well, I can't see how you're doing the update
I can't see any errors
Any code that does (or doesn't do) what you think it does
H
hercules_x_x•509d ago
wait i will update now
A
Angius•509d ago
It's like going to the doctor, saying "me hurt but I have good eyesight"
Zero information besides unrelated one
H
hercules_x_x•509d ago
H
hercules_x_x•509d ago
u see
the many to many table stay empty
the third one
A
Angius•509d ago
That's still a bunch of selects
How are you updating the data?
How are you inserting it?
With EF Core?
With raw SQL?
With NHibernate?
With a sproc?
H
hercules_x_x•509d ago
wuth visual studio
A
Angius•509d ago
Show me the code you use to update the data
H
hercules_x_x•509d ago
BlazeBin - wkqsuzkalyeh
A tool for sharing your source code with the world!
H
hercules_x_x•509d ago
private void buttonSubmit_Click(object sender, EventArgs e)
{
string Gender = ""; MySqlCommand command1, command2; string value1 = "", value2 = "";
if (radioButtonMale.Checked) { Gender = "Male"; } else { Gender = "Female"; }
try
{
conn.Open();
MySqlCommand cmd1 = new MySqlCommand("Insert into customer(Name,Gender,Age,PhoneNo) values('" + textBoxName.Text + "','" + Gender + "','" + textBoxAge.Text + "','" + textBoxPhone_No.Text + "');", conn);
MySqlCommand cmd2 = new MySqlCommand("Insert into drink(Drink_Option,Price) values('" + this.comboBoxDrink_Option.SelectedItem.ToString() + "','Rm3.50')", conn);
string sql_Customer = "selectfrom customer order by customer_ID";
command1 = new MySqlCommand(sql_Customer, conn);
MySqlDataReader reader1 = command1.ExecuteReader();
cmd1.ExecuteNonQuery(); cmd2.ExecuteNonQuery(); /cmd3.ExecuteNonQuery();*/ MessageBox.Show("Thank you for your feedback (◎≧v≦)人(≧v≦●))"); conn.Close(); } catch (MySqlException ex) { MessageBox.Show(ex.Message); } }
cmd1.ExecuteNonQuery(); cmd2.ExecuteNonQuery(); /cmd3.ExecuteNonQuery();*/ MessageBox.Show("Thank you for your feedback (◎≧v≦)人(≧v≦●))"); conn.Close(); } catch (MySqlException ex) { MessageBox.Show(ex.Message); } }
A
Angius•509d ago
Any exceptions thrown?
H
hercules_x_x•509d ago
i dont understand
this all under the sumbet button
A
Angius•509d ago
When you submit the form or whatever, do you get any error?
H
hercules_x_x•509d ago
no
no errors
A
Angius•509d ago
My bet would be that string concatenation somehow makes the query malformed
I'd use parametrized queries instead
H
hercules_x_x•509d ago
how to chamge to parameterz they didnt teach us
would help a lot if u guid lol
guide me
A
Angius•509d ago
Stack Overflow
Parameterized Query for MySQL with C#
I have the code below (I've included what I believe are all relevant sections):
private String readCommand = "SELECT LEVEL FROM USERS WHERE VAL1 = ? AND VAL@ = ?;";
public bool read(string id)
{...
H
hercules_x_x•509d ago
i am lost...
what part is need to change in my code
to be parameterd
A
Angius•509d ago
Instead of string concatenation, use the
@
parameter names
Then, bind the parameters with query.Parameters.AddWithValue()
H
hercules_x_x•509d ago
i know u dont want spone feed me but can at least change some of my cod so i understand
A
Angius•509d ago
Here's a more clear example
H
hercules_x_x•509d ago
so will that fix the third table issue
?
A
Angius•509d ago
It might
H
hercules_x_x•509d ago
any other possbilty
A
Angius•509d ago
I don't have any other ideas, no
H
hercules_x_x•509d ago
the main issue they didnt teach this
and i feel u talk like something so hard to understand to be honest
A
Accord•508d ago
Was this issue resolved? If so, run
/close
- otherwise I will mark this as stale and this post will be archived until there is new activity.H
hercules_x_x•507d ago
BlazeBin - gpseforyplai
A tool for sharing your source code with the world!
H
hercules_x_x•507d ago
thats th solutions
n to a an extra connecton for the table
for the third table
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