nettiers 生成的代码中出现奇怪的异常错误

Question

我在使用 netTiers 生成的代码时遇到了奇怪的问题。我尝试使用以简单形式提供的框架来保存有关所创建实体之一的信息。

这是我从 ASPX 页面调用的方法：

    public void UpdateSupplier(Object sender, EventArgs e)
    {
        // Update Supplier name and code from update form
        supplier.Name = txtName.Text;
        supplier.Code = txtCode.Text;

        // Save the Changes - Exception happens on next line!
        PPGEDI.Data.DataRepository.SuppliersEntityEntityProvider.Save(supplier);

        // Reload the information from the database to display
        ReLoadInformation();
    }

当我通过单击 aspx 页面上的按钮调用该方法时，我得到以下异常信息：

“/”应用程序中的服务器错误。 找不到配置文件 entlib.config。 说明：执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。

Exception Details: System.IO.FileNotFoundException: The configuration file entlib.config could not be found.

Source Error:

Line 190:       public override void DoValidate(object objectToValidate, object currentTarget, string key, ValidationResults validationResults)
Line 191:       {
Line 192:           Validator validator = new ValidationIntegrationHelper(this).GetValidator();
Line 193:
Line 194:           if (validator != null)


Source File: PPGEDI.Entities\Validation\PropertyValidator.cs    Line: 192

Stack Trace:

[FileNotFoundException: The configuration file entlib.config could not be found.]
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.FileConfigurationSource.GetRootedCurrentConfigurationFile(String configurationFile) +221
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.FileConfigurationSource..ctor(String configurationFilepath, Boolean refresh, Int32 refreshInterval) +45
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.FileConfigurationSource..ctor(String configurationFilepath, Boolean refresh) +48
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.FileConfigurationSource..ctor(String configurationFilepath) +39
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.FileConfigurationSourceElement.CreateSource() +64
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceFactory.Create(String name) +355
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceFactory.Create() +96
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.EnterpriseLibraryContainer.CreateDefaultContainer() +25
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.EnterpriseLibraryContainer.SetCurrentContainerIfNotSet() +84
   Microsoft.Practices.EnterpriseLibrary.Common.Configuration.EnterpriseLibraryContainer.get_Current() +22
   Microsoft.Practices.EnterpriseLibrary.Validation.ValidationFactory.get_DefaultCompositeValidatorFactory() +25
   Microsoft.Practices.EnterpriseLibrary.Validation.PropertyValidationFactory.GetPropertyValidatorFromAttributes(Type type, PropertyInfo propertyInfo, String ruleset, MemberAccessValidatorBuilderFactory memberAccessValidatorBuilderFactory) +166
   Microsoft.Practices.EnterpriseLibrary.Validation.PropertyValidationFactory.GetPropertyValidator(Type type, PropertyInfo propertyInfo, String ruleset, ValidationSpecificationSource validationSpecificationSource, MemberAccessValidatorBuilderFactory memberAccessValidatorBuilderFactory) +264
   Microsoft.Practices.EnterpriseLibrary.Validation.PropertyValidationFactory.GetPropertyValidator(Type type, PropertyInfo propertyInfo, String ruleset, ValidationSpecificationSource validationSpecificationSource, MemberValueAccessBuilder memberValueAccessBuilder) +71
   Microsoft.Practices.EnterpriseLibrary.Validation.Integration.ValidationIntegrationHelper.GetValidator() +106
   PPGEDI.Entities.Validation.PropertyValidator.DoValidate(Object objectToValidate, Object currentTarget, String key, ValidationResults validationResults) in PPGEDI.Entities\Validation\PropertyValidator.cs:192
   Microsoft.Practices.EnterpriseLibrary.Validation.Validator.Validate(Object target) +80
   PPGEDI.Entities.EntityBaseCore.Validate(String propertyName) in PPGEDI.Entities\EntityBaseCore.generated.cs:477
   PPGEDI.Entities.EntityBaseCore.OnPropertyChanged(PropertyChangedEventArgs e) in PPGEDI.Entities\EntityBaseCore.generated.cs:342
   PPGEDI.Entities.EntityBaseCore.OnPropertyChanged(String propertyName) in PPGEDI.Entities\EntityBaseCore.generated.cs:329
   PPGEDI.Entities.SuppliersEntityBase.set_Name(String value) in SuppliersEntityBase.generated.cs:279
   PPGEDI.Supplier.Supplier_Main_Config.UpdateSupplier(Object sender, EventArgs e) in Supplier_Main_Config.aspx.cs:29
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.225 

以下方法似乎是导致异常的方法：

  /// <summary>
  /// Does the validate.
  /// </summary>
  /// <param name="objectToValidate">The object to validate.</param>
  /// <param name="currentTarget">The current target.</param>
  /// <param name="key">The key.</param>
  /// <param name="validationResults">The validation results.</param>
  public override void DoValidate(object objectToValidate, object currentTarget, string key, ValidationResults validationResults)
  {
     // Exception Error on next line!!!
     Validator validator = new ValidationIntegrationHelper(this).GetValidator();

     if (validator != null)
     {
        ValidationResults results = validator.Validate(this);

        if (!results.IsValid)
        {
           validationResults.AddAllResults(results);
        }
     }
  }

现在，最奇怪的事情来了。我放置断点以跟踪并找到问题。我在浏览器中按F5，没有异常错误。经过反复试验，我发现每次提交表单时都会出现此异常错误，但如果我按 F5，它会重新提交并没有错误，并且更新确实发生在数据库中。如果有人能就为什么会发生这种情况以及我能做些什么来解决这个错误提出建议，我们将不胜感激。 entlib.config 文件确实在项目中，它也是生成的，我已经验证它确实存在。

使用 ValidationIntegrationHelper 调用的 EntLib 的信息是：

Assembly Microsoft.Practices.EnterpriseLibrary.Validation.dll, v2.0.50727

更新：我仍然无法弄清楚如何解决这个问题，所以我做了一件可怕的事情，我在 DoValidate 中的代码周围放置了一个 try/catch 块，这样它就不会在我身上爆炸.我需要让它在客户使用它时不会中断，但我仍然需要弄清楚它为什么这样做，并修复它，而不是在我们投入生产之前忽略它。如果它只处理验证，那么我可以忽略它，因为我在保存或更新实体之前在前端进行验证。

Answer 1

问题似乎只是在企业库验证中。我使用 NetTiers 验证重新生成了项目，但没有问题。我无法弄清楚问题出在哪里，但是使用 NetTiers 验证生成项目后问题就消失了。