覆盖文件上传控件的上传功能

时间:2013-03-06 15:28:20

标签: file-upload xpages

我想覆盖文件上传控件的上传功能,以便添加我需要的功能。我正在尝试将以下链接中的代码改编为我的案例

Auto-save doc after delete of attachment in File Download control?

将第二个参数的类型更改为 com.ibm.xsp.component.xp.XSPFileUpload ,即:

function rekOverrideFileDownloadAction( component:javax.faces.component.UIOutput,  fDownload:com.ibm.xsp.component.xp.XSPFileUpload ){

和MethodBinding mBinding中的代码,并使用我的文件上传控件的名称,即:

 var mBinding = facesContext.getApplication().createMethodBinding("#{javascript:print('Uploaded');}", null );
overrideFileDownloadAction( getComponent( 'fileUpload1' ) );

不幸的是,发生了javax.faces.FacesException。

任何人都可以帮我修改此代码,以便在用户上传文件时打印此消息吗?

堆栈追踪:

javax.faces.FacesException
javax.faces.FacesException.<init>(FacesException.java:97)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:86)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:210)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:96)
com.ibm.xsp.controller.FacesControllerImpl.execute(FacesControllerImpl.java:250)
com.ibm.xsp.webapp.FacesServlet.serviceView(FacesServlet.java:209)
com.ibm.xsp.webapp.FacesServletEx.serviceView(FacesServletEx.java:204)
com.ibm.xsp.webapp.FacesServlet.service(FacesServlet.java:160)
com.ibm.xsp.webapp.FacesServletEx.service(FacesServletEx.java:138)
com.ibm.xsp.webapp.DesignerFacesServlet.service(DesignerFacesServlet.java:103)
com.ibm.designer.runtime.domino.adapter.ComponentModule.invokeServlet(ComponentModule.java:576)
com.ibm.domino.xsp.module.nsf.NSFComponentModule.invokeServlet(NSFComponentModule.java:1281)
com.ibm.designer.runtime.domino.adapter.ComponentModule$AdapterInvoker.invokeServlet(ComponentModule.java:847)
com.ibm.designer.runtime.domino.adapter.ComponentModule$ServletInvoker.doService(ComponentModule.java:796)
com.ibm.designer.runtime.domino.adapter.ComponentModule.doService(ComponentModule.java:565)
com.ibm.domino.xsp.module.nsf.NSFComponentModule.doService(NSFComponentModule.java:1265)
com.ibm.domino.xsp.module.nsf.NSFService.doServiceInternal(NSFService.java:653)
com.ibm.domino.xsp.module.nsf.NSFService.doService(NSFService.java:476)
com.ibm.designer.runtime.domino.adapter.LCDEnvironment.doService(LCDEnvironment.java:341)
com.ibm.designer.runtime.domino.adapter.LCDEnvironment.service(LCDEnvironment.java:297)
com.ibm.domino.xsp.bridge.http.engine.XspCmdManager.service(XspCmdManager.java:272)

java.lang.NullPointerException
com.ibm.xsp.actions.ActionGroup.invoke(ActionGroup.java:135)
com.ibm.xsp.actions.ActionGroup.invoke(ActionGroup.java:135)
com.ibm.xsp.application.ActionListenerImpl.processAction(ActionListenerImpl.java:60)
javax.faces.component.UICommand.broadcast(UICommand.java:324)
com.ibm.xsp.component.UIEventHandler.broadcast(UIEventHandler.java:366)
com.ibm.xsp.component.UIViewRootEx.broadcast(UIViewRootEx.java:1535)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:307)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:428)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:94)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:210)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:96)
com.ibm.xsp.controller.FacesControllerImpl.execute(FacesControllerImpl.java:250)
com.ibm.xsp.webapp.FacesServlet.serviceView(FacesServlet.java:209)
com.ibm.xsp.webapp.FacesServletEx.serviceView(FacesServletEx.java:204)
com.ibm.xsp.webapp.FacesServlet.service(FacesServlet.java:160)
com.ibm.xsp.webapp.FacesServletEx.service(FacesServletEx.java:138)
com.ibm.xsp.webapp.DesignerFacesServlet.service(DesignerFacesServlet.java:103)
com.ibm.designer.runtime.domino.adapter.ComponentModule.invokeServlet(ComponentModule.java:576)
com.ibm.domino.xsp.module.nsf.NSFComponentModule.invokeServlet(NSFComponentModule.java:1281)
com.ibm.designer.runtime.domino.adapter.ComponentModule$AdapterInvoker.invokeServlet(ComponentModule.java:847)
com.ibm.designer.runtime.domino.adapter.ComponentModule$ServletInvoker.doService(ComponentModule.java:796)
com.ibm.designer.runtime.domino.adapter.ComponentModule.doService(ComponentModule.java:565)
com.ibm.domino.xsp.module.nsf.NSFComponentModule.doService(NSFComponentModule.java:1265)
com.ibm.domino.xsp.module.nsf.NSFService.doServiceInternal(NSFService.java:653)
com.ibm.domino.xsp.module.nsf.NSFService.doService(NSFService.java:476)
com.ibm.designer.runtime.domino.adapter.LCDEnvironment.doService(LCDEnvironment.java:341)
com.ibm.designer.runtime.domino.adapter.LCDEnvironment.service(LCDEnvironment.java:297)
com.ibm.domino.xsp.bridge.http.engine.XspCmdManager.service(XspCmdManager.java:272)

我还注意到,如果我向一个事件添加一个脚本,例如onChange,以便创建事件处理程序,不会发生异常。所以我认为抛出异常是因为没有事件处理程序并且导致空指针。现在我已经将我需要的功能添加到onChange事件中并且没关系,但是如果有人能告诉我是否有办法覆盖它会很好。

提前谢谢!

1 个答案:

答案 0 :(得分:0)

你想做什么?我认为它不可能与片段(它覆盖下载链接的事件处理程序,仅适用于上载控件)。

也许这段代码可以帮助您:http://openntf.org/XSnippets.nsf/snippet.xsp?id=replace-attachment-when-uploading-a-new-attachment