[英]Invalid Cast Exception when trying to use Oracle.DataAccess on Unity
我幾天來一直處理一個問題,沒有任何進展。 我想在Unity上使用Oracle.DataAccess(C#的Oracle數據庫訪問)來進行輔助項目。 我安裝了Oracle客戶端以及數據庫(工作正常),在Assets文件夾中放置.Net 2.x的Oracle.DataAccess.dll文件(只有一個Unity識別)並開始編碼。 這是我在類中處理的應該處理所有數據庫通信的東西:
using System;
using System.Collections.Generic;
using UnityEngine;
using Oracle.DataAccess.Client;
using Oracle.DataAccess.Types;
public static class DBConnection
{
//
static string Host;
static int Port;
static string SID;
static string Username;
static string Password;
//
static bool Initialized = false;
public static void Initialize(string host, int port, string sid, string username, string password)
{
if (Initialized) throw new Exception("DBConnection was already initialized !");
Host = host;
Port = port;
SID = sid;
Username = username;
Password = password;
}
static OracleConnection Connection;
public static void Open()
{
try
{
string connString = "user id=" + Username + ";password=" + Password + ";data source=(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=+" + Host + ")(Port=" + 1521 + "))(CONNECT_DATA=(SERVICE_NAME=" + SID + "))";
using (Connection = new OracleConnection(connString))
{
// ...
}
}
catch (OracleException e)
{
Debug.LogError(e.ErrorCode);
}
}
}
在嘗試使用Open()時,它給了我這個例外:
InvalidCastException: Cannot cast from source type to destination type.
Oracle.DataAccess.Client.CThreadPool..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Oracle.DataAccess.Client.CThreadPool
Oracle.DataAccess.Client.OracleInit.Initialize ()
Oracle.DataAccess.Client.OracleConnection..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Oracle.DataAccess.Client.OracleConnection
DBConnection.Open () (at Assets/Sources/Database/DBConnection.cs:37)
Game.Start () (at Assets/Sources/Game/Game.cs:10)
我仍然無法弄清楚它來自哪里。 連接字符串是正確的:在構造OracleConnection對象期間發生異常(我通過在創建對象后分配連接字符串來確保它)。 DLL是64位,編輯器是64位,Oracle客戶端也是64位。 數據庫工作正常(設法在SQL開發人員上連接到它),所以坦率地說我只是沒有線索。 這對你們任何人都有過嗎?
提前感謝救援我的人:D
您的連接字符串似乎有誤。
嘗試使用以下內容替換該行:
string connString = "user id=" + Username + ";password=" + Password + ";data source=(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=" + Host + ")(Port=" + 1521 + "))(CONNECT_DATA=(SERVICE_NAME=" + SID + ")))";
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