How do I add a text to mysql on buttonclick

Question

0.00/5 (No votes)

See more:

private void pictureBox1_Click(object sender, EventArgs e)
        {
            System.IO.Stream str = Properties.Resources.commander_5;
            System.Media.SoundPlayer snd = new System.Media.SoundPlayer(str);
            snd.Play();

            label1.Text = "S1";



            
   string constring = "datasource=123.456.678;port=3306;username=1234;password=1234";
            string query = "update mysqlcshap.Fahrzeug set (Status) TEXT('1');";
            MySqlConnection Dateneingabe = new MySqlConnection(constring);
            MySqlCommand cmd = new MySqlCommand(query, Dateneingabe);
            MySqlDataReader myReader;


            try
            {
                Dateneingabe.Open();
                myReader = cmd.ExecuteReader();
           
                while (myReader.Read()) { }





            }




            catch (Exception ex)
            {  }

What I have tried:

How can I update the Text on MYSQL on Buttonclick?

Posted 11-Jul-18 4:50am

Member 13904037

Updated 11-Jul-18 6:03am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Mike V Baker · Accepted Answer · 2018-07-11T06:04:00

The query should look more like this

"update mysqlcshap.Fahrzeug set Status='1';"

However, this will update all the records in the database which is probably not what you want. You probably want to update a specific record and for that you need a WHERE clause

"update mysqlcshap.Fahrzeug set Status='1' WHERE Id=1234;"

This assumes that you have a primary key value in your table and it's name is 'Id'. Of course you need to know what the Id is in order to do this.
Sometimes you can create fields that are reserved words. I don't remember if 'Status' is one of them, but just case wrap the field names in [].
You're using ExecuteReader. This query doesn't return anything so there's nothing to read. Use ExecuteNonQuery to run a command that doesn't read.
Your connection string needs fixing (see this. I don't see a 'Database' argument, perhaps it's the mysqlcshap?
I usually wrap my connection in a using statement. Put all that together and this is what I came up with

C#

private void pictureBox1_Click(object sender, EventArgs e)
{
    System.IO.Stream str = Properties.Resources.commander_5;
    System.Media.SoundPlayer snd = new System.Media.SoundPlayer(str);
    snd.Play();
    label1.Text = "S1";
    
    string constring = "datasource=123.456.678;Database=mysqlcshap;port=3306;User Id=1234;Password=1234";
    string query = "update Fahrzeug set [Status]='1' WHERE Id=1234;";
    using (MySqlConnection Dateneingabe = new MySqlConnection(constring))
    {
        MySqlCommand cmd = new MySqlCommand(query, Dateneingabe);
        try
        {
            Dateneingabe.Open();
            cmd.ExecuteNonQuery();
            Dateneingabe.Close();
        }
        catch (Exception ex)
        { 
            // DO SOMETHING WITH THE EX HERE!! 
        }
    }
}

HTH, Mike