我在尝试从我正在开发的 C# 2008 Express Edition 应用程序连接到远程 Oracle 10g 数据库时遇到错误。我正在尝试使用一种极简主义的非侵入式开发方法,以期将 ClickOnce 部署到用户工作站。
关于上述内容,我调查了以下文件(除其他外..)-
What is the minimal setup required to deploy a .NET application with Oracle client 11?
http://jeremybranham.wordpress.com/2011/04/25/oracle-instant-client-with-odp-net/
http://ora-00001.blogspot.com/2010/01/odpnet-minimal-non-intrusive-install.html
http://splinter.com.au/using-the-new-odpnet-to-access-oracle-from-c
Connect to Oracle with odp.net and the OCI from C#
鉴于我遇到的错误,我创建了一个简单的测试应用程序。由带有一个按钮的单个 (wpf) 页面组成。 在按钮的单击事件中,我尝试创建到 Oracle 数据库的连接 -
private void button1_Click( object sender, RoutedEventArgs e )
{
OracleConnection oraConnect;
// string previously used OK in other projects
string connectionString = "Data Source=" +
"(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = myServer)(PORT = 1521)))" +
"(CONNECT_DATA =(SERVICE_NAME = myOracleDb)))" +
";Password=myPw;User ID=myID;";
using ( oraConnect = new OracleConnection( connectionString ) )
{
try
{
if ( oraConnect.State == ConnectionState.Closed )
{
oraConnect.Open();
MessageBox.Show( "oraConnect is attempting to open.." );
}
else
MessageBox.Show( "oraConnect open to DB: " + oraConnect.ServerVersion.ToString() );
}
catch ( NullReferenceException nullExcept )
{
MessageBox.Show( "Caught error: ." + nullExcept.ToString() );
}
catch ( OracleException dbEx )
{
MessageBox.Show( "OraException - " + dbEx.Message.ToString());
}
catch ( Exception ex )
{
Exception current;
current = ex;
while ( current != null )
{
current = current.InnerException;
}
MessageBox.Show( "Db base exception - " + ex.GetBaseException().ToString() );
}
finally
{
oraConnect.Close();
}
}
}
根据上述文章中的信息,我已确保以下 Dll 在我的“bin”文件夹中 -
• oci.dll
• ociw32.dll
• orannzsbb10.dll
• oraocci10.dll
• oraociicus.dll
• msvcr71.dll
(最后在绝望中命名...)并引用了“Oracle.DataAccess.dll”。
错误信息(在'catch ( OracleException dbEx )')是-
"Oracle.DataAccess.Client.OracleException was caught
Message=""
StackTrace:
at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure)
at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, Object src)
at Oracle.DataAccess.Client.OracleConnection.Open()
at OracleConnectionTest.Window1.button1_Click(Object sender, RoutedEventArgs e) in C:\Documents\Visual Studio 2008\Projects\OracleConnectionTest\OracleConnectionTest\Window1.xaml.cs:line 69
InnerException: "
Line 69 is 'oraConnect.Open();'.
此外,报告了以下内容-
"((Oracle.DataAccess.Client.OracleException)($exception)).DataSource' threw an exception of type 'System.NullReferenceException".
我从数据源中的 NullReferenceException 假设问题出在 dll 之一(?),因为我在尝试引用它之前“新建”了上面的 OracleConnection。
另外,代码执行跳转了'catch(NullReferenceException nullExcept)' 并直接进入 OracleException 捕获。
抱歉,我说得有点啰嗦了,但希望这是有道理的? 任何帮助/建议表示赞赏!
最佳答案
好的,很晚才回到这个问题,对此深表歉意!
在此期间,我们的数据库已升级(!)并更改 dll 列表以包含 -
- oraocci11.dll
- oraociccus11.dll
- OraOps11w.dll
- orannzsbb1.dll
从“10”版本开始,仍然没有成功,我使用以下内容编辑了 App.xaml(在此处和网络上进行了广泛搜索之后)-
<system.data>
<DbProviderFactories>
<add name="OracleClient Data Provider"
invariant="System.Data.OracleClient"
description=".Net Framework Data Provider for Oracle"
type="System.Data.OracleClient.OracleClientFactory, System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=##################"/>
</DbProviderFactories>
</system.data>
<!-- publicKeyToken obtained using Reflector to investigate dll -->
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Oracle.DataAccess"
publicKeyToken="##################"
culture="neutral"/>
<bindingRedirect oldVersion="10.2.0.100"
newVersion="2.112.2.0"/>
</dependentAssembly>
</assemblyBinding>
</runtime>
bindingRedirect 成功了!
dll 似乎极度依赖于兼容的版本号
希望我能说我真的理解如何它是如何工作的,但它确实如此,我现在有工作联系...
关于c# - 尝试使用最小设置配置从 C# 程序连接到 Oracle 10g 数据库时出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8603883/