防止插入组件的相同组合模板：

Question

在一个页面时，我们将点击组件外观选项卡我们可以看到仅低于插入按钮组件和模板中列出there.On点击，它会打开另一窗口“插入组件演示”还有，我们将有插入，靠近button.So现在我需要做的虽然插入我需要检查选择的组件和模板的组合是否已经存在有页面，或在不。如果是，那么它应该防止插入相同的弹出窗口，如“这个组合已经存在，选择其他组件”。 任何想法我可以如何继续。如何在插入按钮上触发Javascript？

编辑：

时，我就subscrbing页我得到erro.My代码：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Text; 
using Tridion.ContentManager.Extensibility.Events; 
using Tridion.ContentManager.Extensibility; 
using Tridion.ContentManager.ContentManagement; 
using System.IO; 
using System.Windows.Forms; 




namespace MyEventHandlers 
{ 
[TcmExtension("MyEventHandlerExtension")] 

public class MyEventHandler : TcmExtension 
{ 
    public MyEventHandler() 
{ 
    Subscribe(); 
} 

public void Subscribe() 
{ 
    EventSystem.Subscribe<Page, SaveEventArgs>(SaveBtnInitiated, EventPhases.Initiated); 

} 

private void SaveBtnInitiated(Page subject, SaveEventArgs args, EventPhases phase) 
{ 

    try 
    { 
     List<string> allcplist = new List<string>(); 
     List<string> allcplist = new List<string>(); 
     foreach (ComponentPresentation cp in subject.ComponentPresentations) 
     { 
      allcplist.Add(cp.Component.Id + "," + cp.ComponentTemplate.Id); 
     } 
     List<string> uniquecplist = allcplist.Distinct().ToList(); 
     if (allcplist.Count != uniquecplist.Count) 
     { 
      subject.Checkin(false); 
      throw new Exception("Page has duplicate component presentation"); 

    } 
    catch(Exception) 
    { 

    } 
} 

Answer 1

你为什么订阅组件？我认为它应该是页面。然后你可以步行通过ComponentPresentations属性。

代码要经过组件演示，并抛出一个异常时，重复演示文稿发现：

foreach (var cpA in subject.ComponentPresentations) 
{ 
    if (subject.ComponentPresentations.Where(cpB => ComponentPresentationsAreEqual(cpA, cpB)).ToList().Count() > 2) 
    { 
     throw new DuplicateComponentPresentationsEmbeddedOnPageException(); 
    } 
} 

，功能包括CPB在列表中时，它等于CPA：

function ComponentPresentationsAreEqual(ComponentPresentation cpA, ComponentPresentation cpB) 
{ 
    return cpA.Component.Id == cpB.Component.Id && cpA.ComponentTemplate.Id == cpB.ComponentTemplate.Id; 
} 

Answer 2

您可以在订阅的页面保存事件的事件处理函数中实现此和初始阶段。当有重复的组件演示时，您可以通过抛出异常来取消保存。该消息将显示在TCM Explorer的消息中心中。

Answer 3

这个代码我得到了我的结果感谢@Arjen Stobbe

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Text; 
using Tridion.ContentManager.Extensibility.Events; 
using Tridion.ContentManager.Extensibility; 
using Tridion.ContentManager.ContentManagement; 
using System.IO; 
using System.Windows.Forms; 




namespace MyEventHandlers 
{ 
[TcmExtension("MyEventHandlerExtension")] 

public class MyEventHandler : TcmExtension 
{ 
    public MyEventHandler() 
{ 
    Subscribe(); 
} 

public void Subscribe() 
{ 
    EventSystem.Subscribe<Page, SaveEventArgs>(SaveBtnInitiated, EventPhases.Initiated); 

} 

private void SaveBtnInitiated(Page subject, SaveEventArgs args, EventPhases phase) 
{ 

    try 
    { 
     List<string> allcplist = new List<string>(); 
     List<string> allcplist = new List<string>(); 
     foreach (ComponentPresentation cp in subject.ComponentPresentations) 
     { 
      allcplist.Add(cp.Component.Id + "," + cp.ComponentTemplate.Id); 
     } 
     List<string> uniquecplist = allcplist.Distinct().ToList(); 
     if (allcplist.Count != uniquecplist.Count) 
     { 
      subject.Save(false); 
      throw new Exception("Page has duplicate component presentation"); 

    } 
    catch(Exception) 
    { 

    } 
} 

但我不删除页面上存在的重复CP。我是否需要添加，

for each() 

内

if (allcplist.Count != uniquecplist.Count) 
{ 
}