Question

I am getting this error:

Unknown column 'admin' in 'where clause'

This is my code for the Log-In button:

        mycon.Open();
        string cmdstr = "SELECT * FROM usersettingsdb WHERE user_ID = " + textBox1.Text + "";
        cmd = new MySqlCommand(cmdstr, mycon);
        dr = cmd.ExecuteReader();
        string inputpw = "";
        string dbpw = "";
        while (dr.Read())
        {
            inputpw = maskedTextBox1.Text;
            dbpw = (dr["user_pw"].ToString());
        }
        dr.Close();
        mycon.Close();

I can’t quite get why I get that error since my Select statement is the same with all the other select statements I see online

Answer 1

enclose the textbox value in single quotes

 string cmdstr = "SELECT * FROM usersettingsdb WHERE user_ID = '" + textBox1.Text + "'";

Edit:

As commented by Tigran. Use Parametarized queries instead just concatenating values from the controls