West Wind Web Toolkit for ASP.NET
Class BusinessObjectEF<TEntity,TContext>
Class BusinessObjectEF<TEntity,TContext>
Assume: Operations work best and efficiently when tables have a TimeStamp field
Each business object maps to a primary Entity/Table, but can of course access other tables.
public abstract class BusinessObjectEF<TEntity,TContext> : object, IDisposable
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Constructor | Base constructor - initializes the business object's context and table mapping info |
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ProviderFactory | The provider factory used for direct ADO.NET operations |
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AbortChanges | Cancel Changes on the current connected context public virtual void AbortChanges();
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CancelChanges | Aborts all changes made to tracked entities. public void CancelChanges();
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Delete | Deletes an entity specific by its Pk public virtual bool Delete(object Pk);
public bool Delete();
public virtual bool Delete(TEntity entity);
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Dispose | public sealed void Dispose();
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GetProperties | public bool GetProperties(string stringFieldNameToLoadFrom);
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Load | Loads an individual instance of an entity and returns the instance. Entity is also set with the entity if loaded. public virtual TEntity Load(int id);
public virtual TEntity Load(Guid id);
public virtual TEntity Load(string id);
public virtual TEntity Load(object id);
public virtual TEntity Load(Expression<Func`2> whereClauseLambda);
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LoadBase | public virtual TEntity LoadBase(ObjectQuery<TEntity> query);
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NewEntity | Create a new entity instance. When in connected mode the instance is automatically added to the context unless you pass false to the constructor. public virtual TEntity NewEntity(bool noContextInsert);
public virtual TEntity NewEntity();
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Save | Saves a disconnected entity object public virtual bool Save(TEntity entity);
public virtual bool Save();
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SetError | Sets an internal error message. public void SetError(string Message);
public void SetError(Exception ex);
public void SetError();
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SetProperties | Saves the Properties Dictionary to a specified field value public void SetProperties(string stringFieldToSaveTo);
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SubmitChanges | Saves changes on the current connected context. Preferrably you should use Save() rather than this method, but this provides a more low level direct context saving approach if you are working with connected data. public bool SubmitChanges(ConflictResolutionModes ConflictResolutionMode);
public bool SubmitChanges();
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Validate | Validate() is used to validate business rules on the business object. Generally this method consists of a bunch of if statements that validate the data of the business object and adds any errors to the wwBusiness.ValidationErrors collection. public bool Validate(TEntity entity);
public virtual bool Validate();
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Context | Instance of the Data Context that is used for this class. Note that this is a primary instance only - other instances can be used in other situations. |
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Entity | Instance of a locally managed entity object. Set with Load and New methods. |
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ErrorException | Instance of an exception object that caused the last error |
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ErrorMessage | Error Message of the last exception |
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Options | Contains options for the business object's operation |
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Properties | |
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TableInfo | Contains information about the primary table that is mapped to this business object. Contains table name, Pk and version field info. |
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ValidationErrors | A collection that can be used to hold errors. This collection is set by the AddValidationError method. |
