public async Task <IActionResult> Create()
{
var context = CreateDomainContext();
var forumDomain = DomainProvider.GetService <EntityDomainService <Entity.Forum> >();
IEntityEditModel <Entity.Forum> forumResult;
try
{
forumResult = await forumDomain.ExecuteAsync <IEntityEditModel <Entity.Forum> >(context, "Detail");
ViewBag.Forum = forumResult.Item;
}
catch (ArgumentException ex)
{
return(NotFound());
}
catch (EntityNotFoundException ex)
{
return(NotFound());
}
var threadDomain = DomainProvider.GetService <EntityDomainService <Thread> >();
IEntityEditModel <Thread> threadResult = await threadDomain.ExecuteAsync <IEntityEditModel <Thread> >(context, "Create");
threadResult.Item.Forum = forumResult.Item;
return(View(threadResult));
}
/// <summary>
/// 输出一个编辑器。
/// </summary>
/// <typeparam name="TEntity">实体类型。</typeparam>
/// <param name="helper">Html帮助器。</param>
/// <param name="model">实体编辑模型。</param>
/// <param name="expression">属性选择表达式。</param>
/// <returns></returns>
public static IHtmlContent Editor <TEntity>(this IHtmlHelper helper, IEntityEditModel <TEntity> model, Expression <Func <TEntity, object> > expression)
where TEntity : class, IEntity, new()
{
if (helper == null)
{
throw new ArgumentNullException(nameof(helper));
}
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if (!(expression.Body is MemberExpression))
{
throw new NotSupportedException();
}
MemberExpression memberExpression = (MemberExpression)expression.Body;
if (!(memberExpression.Expression is ParameterExpression))
{
throw new NotSupportedException();
}
var value = expression.Compile()(model.Item);
var property = model.Metadata.GetProperty(memberExpression.Member.Name);
return(Editor(helper, model.Item, property, value));
}
public async Task <IActionResult> Create()
{
var context = CreateDomainContext();
var forumDomain = DomainProvider.GetService <EntityDomainService <Entity.Forum> >();
IEntityEditModel <Entity.Forum> forumResult;
try
{
forumResult = await forumDomain.ExecuteAsync <IEntityEditModel <Entity.Forum> >(context, "Detail");
ViewBag.Forum = forumResult.Item;
}
catch (DomainServiceException ex)
{
if (ex.InnerException is ArgumentException)
{
return(StatusCode(400, ex.InnerException.Message));
}
else if (ex.InnerException is EntityNotFoundException)
{
return(NotFound());
}
else
{
ExceptionDispatchInfo.Capture(ex).Throw();
throw;
}
}
var threadDomain = DomainProvider.GetService <EntityDomainService <Thread> >();
IEntityEditModel <Thread> threadResult = await threadDomain.ExecuteAsync <IEntityEditModel <Thread> >(context, "Create");
threadResult.Item.Forum = forumResult.Item;
return(View(threadResult));
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
IEntityEditModel model = (IEntityEditModel)value;
writer.WriteStartObject();
writer.WritePropertyName("Item");
serializer.Serialize(writer, model.Item);
writer.WritePropertyName("Properties");
serializer.Serialize(writer, model.Properties);
writer.WritePropertyName("Metadata");
serializer.Serialize(writer, model.Metadata);
writer.WriteEndObject();
}
/// <summary>
/// Render a property viewer.
/// </summary>
/// <typeparam name="TEntity">Type of entity.</typeparam>
/// <param name="helper">A html helper.</param>
/// <param name="model">Entity model.</param>
/// <param name="expression">Expression for property to entity.</param>
/// <returns></returns>
public static MvcHtmlString Viewer <TEntity>(this HtmlHelper helper, IEntityEditModel <TEntity> model, Expression <Func <TEntity, object> > expression)
where TEntity : class, IEntity, new()
{
if (!(expression.Body is MemberExpression))
{
throw new NotSupportedException();
}
MemberExpression memberExpression = (MemberExpression)expression.Body;
if (!(memberExpression.Expression is ParameterExpression))
{
throw new NotSupportedException();
}
var value = expression.Compile()(model.Item);
var property = model.Metadata.GetProperty(memberExpression.Member.Name);
return(Viewer(helper, model.Item, property, value));
}
