iis asp.net core 5 上的 Firebird 读取数据库问题

Firebird reading database issue on iis asp.net core 5

我想在 ASP.NET 带有嵌入式 Firebird v2.5 的 Core MVC 中开发一个演示项目。我从文本文件中读取了 Firebird 连接字符串信息。因为我将在项目演示中更改数据库,所以我必须从文本文件中读取。或者你的想法是什么?

在这个项目中,我创建了一个 DbContext 文件,并使用 class:

填写数据库信息
public class DbContext
{
    string startupdirectory = Path.GetDirectoryName(System.Reflection.Assembly.GetEntryAssembly().Location)+"\settings.txt";
    string dblocation = string.Empty;
    string userName = string.Empty;
    string pass = string.Empty;
    int port = 0;
    string dataSource = string.Empty;
   
    public DbContext()
    {
        if (File.Exists(startupdirectory))
        {
            string[] allData = File.ReadAllLines(startupdirectory);
            dblocation = allData[0].ToString();
            userName = allData[1].ToString();
            pass = allData[2].ToString();
            port = Convert.ToInt32(allData[3].ToString());
            dataSource = allData[4].ToString();
        }
    }

    public string GetConnectionString()
    {
        FbConnectionStringBuilder csb = new();
        csb.Database = dblocation;
        csb.DataSource = dataSource;
        csb.UserID = userName;
        csb.Password = pass;
        csb.ServerType = FbServerType.Default;
        csb.Port = port;
        //i added below code for embedded db
        csb.Dialect = 3;
        csb.Role = "";
        csb.ConnectionLifeTime = 15;
        csb.Pooling = true;
        csb.MinPoolSize = 0;
        csb.MaxPoolSize = 50;
        csb.PacketSize = 8192;
        return csb.ToString();
    }

    public FbConnection GetConnection()
    {
        string connectionString = GetConnectionString();
        FbConnection connection = new();
        connection.ConnectionString = connectionString;
        connection.Open();
        return connection;
    }

    public void KillConnection(FbConnection connection)
    {
        connection.Close();
        connection.Dispose();
    }
}

当我在本地工作时,一切都很好。我可以做所有的CRUD操作。

但是当我上传我的项目时,我看到了这个屏幕:

An unhandled exception occurred while processing the request.

IscException: I/O error during "CreateFile (open)" operation for file "C:\Firma\BlinePalmeWEB\MandantenPalmeIT\GDI21.FDB"

Error while trying to open file

FirebirdSql.Data.Client.Managed.GdsConnection.HandleResponseException(IResponse response)

FbException: I/O error during "CreateFile (open)" operation for file "C:\Firma\BlinePalmeWEB\MandantenPalmeIT\GDI21.FDB"

Error while trying to open file
FirebirdSql.Data.FirebirdClient.FbConnectionInternal.Connect()

Stack Query Cookies Headers Routing

IscException: I/O error during "CreateFile (open)" operation for file "C:\Firma\BlinePalmeWEB\MandantenPalmeIT\GDI21.FDB" Error while trying to open file FirebirdSql.Data.Client.Managed.GdsConnection.HandleResponseException(IResponse response) FirebirdSql.Data.Client.Managed.Version10.GdsDatabase.ReadResponse() FirebirdSql.Data.Client.Managed.Version10.GdsDatabase.Attach(DatabaseParameterBufferBase dpb, string database, byte[] cryptKey) FirebirdSql.Data.FirebirdClient.FbConnectionInternal.Connect()

Show raw exception details
FbException: I/O error during "CreateFile (open)" operation for file "C:\Firma\BlinePalmeWEB\Mandanten\11PalmeIT\GDI21.FDB" Error while trying to open file
FirebirdSql.Data.FirebirdClient.FbConnectionInternal.Connect()
FirebirdSql.Data.FirebirdClient.FbConnection.Open()
GDIWebApplication.Controllers.DbContext.GetConnection() in DbContext.cs
GDIWebApplication.Models.Deneme.ProductRepository.GetArtikelList() in ProductRepository.cs
GDIWebApplication.Controllers.ProductController.Index(string search) in ProductController.cs
lambda_method1(Closure , object , object[] )
Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor+SyncActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, object controller, object[] arguments)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Show raw exception details
FirebirdSql.Data.FirebirdClient.FbException (0x80004005): I/O error during "CreateFile (open)" operation for file "C:\Firma\BlinePalmeWEB\Mandanten\11PalmeIT\GDI21.FDB"
Error while trying to open file
 ---> FirebirdSql.Data.Common.IscException: I/O error during "CreateFile (open)" operation for file "C:\Firma\BlinePalmeWEB\Mandanten\11PalmeIT\GDI21.FDB"
Error while trying to open file
   at FirebirdSql.Data.Client.Managed.GdsConnection.HandleResponseException(IResponse response)
   at FirebirdSql.Data.Client.Managed.Version10.GdsDatabase.ReadResponse()
   at FirebirdSql.Data.Client.Managed.Version10.GdsDatabase.Attach(DatabaseParameterBufferBase dpb, String database, Byte[] cryptKey)
   at FirebirdSql.Data.FirebirdClient.FbConnectionInternal.Connect()
   at FirebirdSql.Data.FirebirdClient.FbConnectionInternal.Connect()
   at FirebirdSql.Data.FirebirdClient.FbConnection.Open()
   at GDIWebApplication.Controllers.DbContext.GetConnection() in C:\Users\MD\source\repos\GDIWebApplication\Models\Context\DbContext.cs:line 60
   at GDIWebApplication.Models.Deneme.ProductRepository.GetArtikelList() in C:\Users\MD\source\repos\GDIWebApplication\Models\Repositories\ProductRepository.cs:line 20
   at GDIWebApplication.Controllers.ProductController.Index(String search) in C:\Users\MD\source\repos\GDIWebApplication\Controllers\ProductController.cs:line 16
   at lambda_method1(Closure , Object , Object[] )
   at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

我添加的所有权限都是 IIS,但我无法正常工作 - 我该如何解决这个问题?

您没有使用嵌入式 Firebird。正如您指定的 FbServerType.Default(这也是默认值),您正在使用 TCP/IP 通过普通的 Firebird 服务器进行连接,错误表明数据库文件不存在(或者可能是 Firebird 服务器进程没有足够的访问权限来打开文件)。

如果你真的想使用 Firebird Embedded(我个人认为这对于服务器应用程序来说不是一个好主意),你需要指定 FbServerType.Embedded。还要确保数据库文件实际存在于 dataSource.

指定的服务器上的 C:\Firma\BlinePalmeWEB\MandantenPalmeIT\GDI21.FDB