OAF中下载附件之后页面失效，报过时的数据异常，浏览器后退异常

我在使用了下载功能之后，再往页面添加行或进行保存，页面老是报浏览器后退的异常。

猜测是因为我的下载按钮使用的submitButton，它隐式的包含了一个submit动作，且我在代码中有一个Commit动作，而下载完成之后有一个

response.getOutputStream().flush();

response.getOutputStream().close();

操作，导致页面失效。

解决方式：

将submitButton改为button，再增加firePartialAction的事件即可。

另：如果是标准的页面，需要添加一个button按钮，且为其添加事件的代码如下。

//预览审核报告

OACellFormatBean createPreviewCellBean =(OACellFormatBean)this.createWebBean(pageContext , OAWebBeanConstants.CELL_FORMAT_BEAN , null , null);
OAButtonBean previewPDFBean =
    (OAButtonBean)createWebBean(pageContext , OAWebBeanConstants.BUTTON_BEAN , null , "CuxPreviewPDFEvent");
previewPDFBean.setID("CuxPreviewPDFBtn");
previewPDFBean.setName("CuxPreviewPDFBtn");
String previewPDF = pageContext.getMessage("CUX" , "CUX_PREVIEW_PDF_FILE" , null);
previewPDFBean.setLabel(previewPDF);
previewPDFBean.setText(previewPDF);
Hashtable apprHashTable = new Hashtable(1);
//此事件会隐式的包含submit动作。
//apprHashTable.put("CuxSuppCateMappingId" ,
//                          new OADataBoundValueViewObject(CuxViewApprHisBean , "SuppItemCateMappingId" , "NewSuppReqSearchVO"));
//previewPDFBean.setFireActionForSubmit("CuxPreviewPDFEvent", null, apprHashTable, true, true);

//此事件等价于在Button上设置了firePartialAction事件，且parameters中的key,value分别为param_AucHeaderId，{$AuctionHeaderId}
FirePartialAction previewFirePartialAction = new FirePartialAction("CuxPreviewPDFEvent");Parameter[] params = new Parameter[4];
params[0] = new Parameter();
params[0].setValueBinding(new OADataBoundValueFireActionURL(attrBidValueBean , "{$AuctionHeaderId}"));
params[0].setKey("param_AucHeaderId");
previewPDFBean.setAttributeValue(OAWebBeanConstants.PRIMARY_CLIENT_ACTION_ATTR,previewFirePartialAction);
createPreviewCellBean.addIndexedChild(previewPDFBean);
OARowLayoutBean btnRowBean =(OARowLayoutBean)webBean.findChildRecursive("ButtonBarRow");
btnRowBean.addIndexedChild(createPreviewCellBean);

添加图片按钮事件

        OAImageBean CuxViewApprHisBean = (OAImageBean)createWebBean(pageContext,OAWebBeanConstants.IMAGE_BEAN,null,null);
        CuxViewApprHisBean.setID("CuxViewApprHistory");
        String apprHierarchy = pageContext.getMessage("CUX" , "CUX_SUPP_INQURE_APP_HIS" , null);
        CuxViewApprHisBean.setLabel(apprHierarchy);
        CuxViewApprHisBean.setSource(OAWebBeanConstants.APPS_MEDIA_DIRECTORY +"duplicate_enabled.gif");
        Hashtable apprHashTable = new Hashtable(1);
        apprHashTable.put("CuxSuppCateMappingId" ,
                                  new OADataBoundValueViewObject(CuxViewApprHisBean , "SuppItemCateMappingId" , "NewSuppReqSearchVO"));
        CuxViewApprHisBean.setFireActionForSubmit("CuxApproveHistEvent" , null , apprHashTable , true);
        ResultRNBean.addIndexedChild(11 , CuxViewApprHisBean);

Table添加列

        OATableBean ResultRNBean =
            (OATableBean)webBean.findChildRecursive("RegTableRN");

        OAMessageStyledTextBean phoneBean =
            (OAMessageStyledTextBean)createWebBean(pageContext,
                                                   OAMessageStyledTextBean.MESSAGE_STYLED_TEXT_BEAN,
                                                   null, "PhoneNumber");
        phoneBean.setViewUsageName("NewSuppReqSearchVO"); //此列绑定的VO
        phoneBean.setViewAttributeName("PhoneNumber"); //此列绑定的VO中的字段
        phoneBean.setLabel("联系电话"); //此列需要显示的题头
        ResultRNBean.addIndexedChild(9, phoneBean);

Table添加Switcher列

OASwitcherBean reviewSwitcherRN =
            (OASwitcherBean)createWebBean(pageContext,
                                          "/cux/oracle/apps/pos/onboard/webui/CuxSuppReqReviewSwitcherRN",
                                          "reviewSwitcherRN", true);
        if (ResultRNBean != null) {
            ResultRNBean.addIndexedChild(12, reviewSwitcherRN);
        }

标准删除按钮添加事件

OAImageBean DeleteBean =
            (OAImageBean)webBean.findChildRecursive("Delete");
        Hashtable deleteHashTable = new Hashtable(2);
        deleteHashTable.put("mappingId",
                            new OADataBoundValueViewObject(DeleteBean,
                                                           "MappingId",
                                                           "NewSuppReqSearchVO"));
        deleteHashTable.put("RegistrationStatus",
                            new OADataBoundValueViewObject(DeleteBean,
                                                           "RegistrationStatus",
                                                           "NewSuppReqSearchVO"));
        DeleteBean.setFireActionForSubmit("CuxDelete", null, deleteHashTable,
                                          true);