javascript - 为什么不能从事件接收器在Web部件(用户控件)中调用公共(public)方法？

我添加了此事件接收器（基于我发现的here）：

using System;
using System.Security.Permissions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Security;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.Workflow;

namespace PostTravelWizard.PostTravelItemEventReceiver
{
    /// <summary>
    /// List Item Events
    /// </summary>
    public class PostTravelItemEventReceiver : SPItemEventReceiver
    {
       /// <summary>
       /// An item was added.
       /// </summary>
       public override void ItemAdded(SPItemEventProperties properties)
       {
           base.ItemAdded(properties);
           //GeneratePDF(); <= "The name 'GeneratePDF' does not exist in the current context
       }

       /// <summary>
       /// The list received a context event.
       /// </summary>
       public override void ContextEvent(SPItemEventProperties properties)
       {
           base.ContextEvent(properties);
           // TODO: What "context event" occurs here? To what event should I respond?
       }

    }
}

我希望（从客户端/ Javascript）更新列表时，然后在后面的代码中检索这些值以生成PDF文件。我的* .ascx.cs文件中包含以下代码：

public partial class PostTravelWizardWebPartUserControl : UserControl
{
    . . .

    public void GeneratePDF(PostTravelData ptd)
    {
        ;//bla
    }

...但是这不会让我从事件接收器拨打GeneratePDF()-失败


  在当前上下文中不存在名称“ GeneratePDF”


为什么？我该如何纠正此问题？

最佳答案

GeneratePDF是PostTravelWizardWebPartUserControl类的实例方法。为了从PostTravelItemEventReceiver调用它，您必须创建PostTravelWizardWebPartUserControl的实例或将方法（GeneratePDF）设置为static。

情况1

public override void ItemAdded(SPItemEventProperties properties)
{
    base.ItemAdded(properties);
    new PostTravelWizardWebPartUserControl().GeneratePDF();
}

情况二

public partial class PostTravelWizardWebPartUserControl : UserControl
{
    public static void GeneratePDF(PostTravelData ptd)
    {
        ;//bla
    }
}


public class PostTravelItemEventReceiver : SPItemEventReceiver
{
    base.ItemAdded(properties);
    PostTravelWizardWebPartUserControl.GeneratePDF();
}