MySQL＆C＃MySql.Data.MySqlClient.MySqlException catch in try catch

Question

当我按下按钮时，出现以下C＃代码错误。它是夹在我的try-catch：

型“MySql.Data.MySqlClient.MySqlException”的第一次机会异常出现在MySql.Data.dll

我想知道这可能是什么那是错的。任何帮助表示赞赏！

方法：

private void addChildBtn_Click(object sender, EventArgs e) 
{ 
    string firstName = firstNameAdd.Text; 
    int ageComboIndex = ageComboAdd.SelectedIndex; 
    string age = this.ageComboAdd.Items[ageComboIndex].ToString(); 

    int genderComboIndex = genderComboAdd.SelectedIndex; 
    string gender = this.genderComboAdd.Items[genderComboIndex].ToString(); 

    string address = addressAdd.Text; 

    string caregiverOneName = caregiver1NameAdd.Text; 
    string caregiverOnePhone = caregiver1PhoneAdd.Text; 
    string caregiverTwoName = caregiver2NameAdd.Text; 
    string caregiverTwoPhone = caregiver2PhoneAdd.Text; 

    server = "localhost"; 
    port = "3306"; 
    database = "childeren"; 
    uid = "root"; 
    password = "password"; 

    MySqlConnection connection2 = new MySqlConnection("Server=" + server + ";" + 
     "Port=" + port + ";" + "Database=" + database + ";" + 
     "Uid=" + uid + ";" + "Password=" + password + ";"); 

    // Perform databse operations 
    try 
    { 
     connection2.Open(); 
     string query = "INSERT INTO childdatabase (name2, age, gender, " + 
      "adress, caregiver1Name, caregiver1Phone, caregiver2Name, " +  
      "caregiver2Phone) VALUES('" + firstName + "','" + age + 
      "','" + gender + "','" + address + "','" + caregiverOneName + 
      "','" + caregiverOnePhone + "','" + caregiverTwoName + 
      "','" + caregiverTwoPhone + "')"; 
     MySqlCommand cmd = new MySqlCommand(query, connection2); 

     cmd.ExecuteNonQuery(); 
     connection2.Close(); 
    } 

    catch (Exception ex) 
    { 
     MessageBox.Show("Failed"); 
     //updateStatus(ex.Message.ToString()); 
    } 

    connection2.Close(); 
} 

的MySQL创建表设置：

create database childeren; 
use childeren; 
CREATE TABLE childDatabase 
(
    id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, 
    name2 VARCHAR(50), 
    age VARCHAR(3), 
    gender VARCHAR(6), 
    adress VARCHAR(50), 
    caregiver1Name VARCHAR(50), 
    caregiver1Phone VARCHAR(10), 
    caregiver2Name VARCHAR(50), 
    caregiver2Phone VARCHAR(10) 
); 

Answer 1

你忘了在你的查询字符串一（双）报价？具体在caregiver2Phone之前。

string query = "INSERT INTO childdatabase (name2, age, gender, " + 
     "adress, caregiver1Name, caregiver1Phone, caregiver2Name, " +  
     "caregiver2Phone) VALUES('" + firstName + "','" + age + 
     "','" + gender + "','" + address + "','" + caregiverOneName + 
     "','" + caregiverOnePhone + "','" + caregiverTwoName + 
     "','" + caregiverTwoPhone + "')";