Question

我正在尝试以编程方式发布媒体项，但我遇到了PublishOptions对象的问题。在运行时，当我上传媒体项时，实例化PublishOptions对象的代码行正在中断。我收到以下消息说：

"Value cannot be null. Parameter Name: item"

堆栈跟踪是：

at Sitecore.Diagnostics.Assert.ArgumentNotNull(Object argument, String argumentName)
at Sitecore.Data.Managers.ItemProvider.ApplySecurity(Item item, SecurityCheck securityCheck)
at Sitecore.Data.Managers.ItemProvider.GetRootItem(Language language, Version version, Database database, SecurityCheck securityCheck)
at Sitecore.Data.Managers.ItemManager.GetRootItem(Language language, Version version, Database database)
at Sitecore.Nexus.Data.DataCommands.ResolvePathCommand.(String itemPath, Database database)
at Sitecore.Nexus.Data.DataCommands.ResolvePathCommand.(String itemPath, Database database)
at Sitecore.Nexus.Data.NexusDataApi.ResolvePath(String itemPath, Database database)
at Sitecore.Data.Engines.DataCommands.ResolvePathCommand.DoExecute()
at Sitecore.Data.Engines.EngineCommand`2.Execute()
at Sitecore.Data.Engines.DataEngine.ResolvePath(String itemPath)
at Sitecore.Data.Managers.ItemProvider.ResolvePath(String itemPath, Database database)
at Sitecore.Data.Managers.ItemProvider.GetItem(String itemPath, Language language, Version version, Database database, SecurityCheck

以下是实例化PublishOptions对象的代码（它正在破坏的地方）：

public void OnItemSaved(Object sender, EventArgs args)
    {
        var item = Event.ExtractParameter(args, 0) as Item;

        using (new SecurityDisabler())
        {
            if (item != null)
            {
                if (item.Paths.IsMediaItem)
                {
                    var source = new Database("master");
                    var target = new Database("web");


                    var options = new PublishOptions(source, target, PublishMode.SingleItem, item.Language, DateTime.Now)
                                      {
                                          RootItem = item,
                                          Deep = true,

                                      };

                    var publisher = new Publisher(options);

                    publisher.PublishAsync();
                }
            }
        }
    }

我收到此错误的原因是什么？

Answer 1

试试这个，看看这是否有效，我猜它是与数据库有关。

public void OnItemSaved(Object sender, EventArgs args)
    {
        var item = Event.ExtractParameter(args, 0) as Item;

        using (new SecurityDisabler())
        {
            if (item != null)
            {
                if (item.Paths.IsMediaItem)
                {
                    var source = Factory.GetDatabase("master");
                    var target = Factory.GetDatabase("web");

                    var options = new PublishOptions(source, target, 
                                                     PublishMode.SingleItem, item.Language, 
                                                     DateTime.Now)
                                      {
                                          RootItem = item,
                                          Deep = true,
                                      };

                    var publisher = new Publisher(options);

                    publisher.PublishAsync();
                }
            }
        }
    }

Answer 2

我认为你陷入了一个经典的错误。 item：已保存也将在您的项目发布时触发。

我最初的猜测是，您应该将支票扩大为

if ( item != null && item.Database.Name == "master" )

以防止您的代码尝试发布该项目，因为项目：已保存的事件在发布期间在“网络”上触发。

尝试以编程方式发布媒体项时，PublishOptions失败

2 个答案: