C# Code Error Checking

Question

Error:

Operator && cannot be applied to operands of type bool and string

The name checkbox2 does not exist in the current context

Cannot implicit convert type string to int

Operator || cannot be applied to operands of type string and string

Operator || cannot be applied to operands of type string and string

 

 if (textBox11.Text != "" && textBox12.Text != "" && textBox13.Text != "" && textBox14.Text != "" && radioButton1.Text != "" || radioButton2.Text != "" && checkBox1.Text! = "" || checkbox2.Text != "")
            {
                string connectionString;
                MySqlConnection cnn;
                connectionString = @"Data Source=localhost;Initial Catalog=testDB;User ID=root;Password=mysql";
                cnn = new MySqlConnection(connectionString);
                cnn.Open();
                int id = textBox14.Text;
                string name = textBox11.Text;
                string year = textBox12.Text;
                string quality = radioButton1.Text || radioButton2.Text;
                string taste = checkBox1.Text || checkBox2.Text;
                string sales = textBox13.Text;
                textBox11.Text = "";
                textBox12.Text = "";
                textBox13.Text = "";
                textBox14.Text = "";
                radioButton1.Text = "";
                radioButton2.Text = "";
                checkBox1.Text = "";
                checkBox2.Text = "";
                string query = "INSERT INTO fruits VALUES(@fruitsname, @fruitsyear, @quality, @taste, @sales)";
                using (MySqlCommand cmd = new MySqlCommand(query))
                {
                    cmd.Parameters.AddWithValue("@fruitsid", Convert.ToInt32(id));
                    cmd.Parameters.AddWithValue("@fruitsname", name);
                    cmd.Parameters.AddWithValue("@fruitsyear", year);
                    cmd.Parameters.AddWithValue("@quality", quality);
                    cmd.Parameters.AddWithValue("@sales", taste);
                    cmd.Parameters.AddWithValue("@sales", sales);
                    cmd.Connection = cnn;
                    cmd.ExecuteNonQuery();
                    MessageBox.Show("Record Inserted Successfully");
                    DisplayData();
                    cnn.Close();
                }
            }
            else
            {
                MessageBox.Show("Please Fill Data");
            }
        }