Unity sqlite C＃オブジェクト参照がオブジェクトのインスタンスに設定されておらず、データベースがロックされている

Question

ここでの問題は本当にわかりません。入力からデータを取得しようとすると、フィールド。 助けてください..

public InputField username; 
public InputField password; 
public Button register; 
SqliteConnection dbconn; 
// Use this for initialization 
void Start() { 
    username = gameObject.GetComponent<InputField>(); 
    password = gameObject.GetComponent<InputField>(); 
    register = gameObject.GetComponent<Button>(); 
    string conn = "URI=file:" + Application.dataPath + "/thesisdatabase.db"; 
    dbconn = new SqliteConnection (conn); 
    dbconn.Open(); 

    SqliteCommand cmd = new SqliteCommand(); 


    InputField.SubmitEvent usernameValue = new InputField.SubmitEvent(); 
    InputField.SubmitEvent passwordValue = new InputField.SubmitEvent(); 
    username.onEndEdit = usernameValue; 
    password.onEndEdit = passwordValue; 
    Debug.Log (usernameValue); 
    //  string usernameValue = "we"; 
    //  string passwordValue = "wwwe"; 
    string sqlInsert = "INSERT INTO user (username, password) VALUES ('" +usernameValue+ "' , '"+passwordValue+"')"; 
    cmd.CommandText = sqlInsert; 
    cmd.Connection = dbconn; 
    cmd.ExecuteNonQuery(); 
    //   register.onClick.AddListener (registerMe); 

    cmd.Dispose(); 
    cmd = null; 
    dbconn.Close(); 
    dbconn = null; 



} 

Answer 1

あなたがユニティのUI APIを使用していくつかの困難を持っているようです。しかし、私はMySQLの専門家ではありませんが、あなたは次のコードを試してみてください：

// Drag & Drop the gameobject with the InputField component 
public InputField username; 

// Drag & Drop the gameobject with the InputField component 
public InputField password; 

// Drag & Drop the gameobject with the Button component 
public Button register; 

SqliteConnection dbconn; 

// Use this for initialization 
void Start() 
{ 
    OpenDatabaseConnection(); 
    register.onClick.AddListener (OnRegisterButtonClicked); 
} 
void OnDestroy() 
{ 
    CloseDatabaseConnection(); 
} 

private void OnRegisterButtonClicked() 
{ 
    // Make sure the username and password are not empty 
    if(!string.IsNullOrEmpty(username.text) && !string.IsNullOrEmpty(password.text)) 
    { 
     InsertUser(username.text, password.text); 
    } 
    else 
    { 
     Debug.LogError("Username or password is missing"); 
    } 
} 

private void InsertUser(string username, string password) 
{ 
    SqliteCommand cmd = new SqliteCommand(); 
    string sqlInsert = "INSERT INTO user (username, password) VALUES ('" +username+ "' , '"+password+"')"; 
    cmd.CommandText = sqlInsert; 
    cmd.Connection = dbconn; 
    cmd.ExecuteNonQuery(); 
    cmd.Dispose(); 
    cmd = null; 
} 

private void OpenDatabaseConnection() 
{ 
    string conn = "URI=file:" + Application.dataPath + "/thesisdatabase.db"; 
    dbconn = new SqliteConnection (conn); 
    dbconn.Open(); 
} 

private void CloseDatabaseConnection() 
{ 
    dbconn.Close(); 
    dbconn = null; 
}