ADF af:inputFile 不使用 valueChangeListener 触发 ValueChangeEvent

Question

我尝试将 RichInputFile 与 viewScopeBean 绑定失败。

这是我的代码：

jsff :

<af:panelGroupLayout id="pgl1" layout="horizontal">
      <af:inputFile label="Upload File" id="if1"
                    binding="#{viewScope.userBean.inputFile}"
                    valueChangeListener="#{viewScope.userBean.onFileUploadValueChangeListener}"
                    autoSubmit="true"/>
      <af:spacer width="10" height="10" id="s7"/>
      <af:commandButton text="Upload" id="cb1"
                        disabled="#{viewScope.userBean.inputFile.value == null ? true : false}"
                        partialTriggers="if1"
                        actionListener="#{viewScope.userBean.onUploadFile}"/>
  </af:panelGroupLayout>

豆子：

public class UserBean{
private RichInputFile inputFile;
private UploadedFile file;
private String fileContent;
private String fileName;
private InputStream inputstream;

public UserBean() {
    super();
}

public void onFileUploadValueChangeListener(ValueChangeEvent valueChangeEvent) {
    resetValue();
    file = (UploadedFile)valueChangeEvent.getNewValue();
    try {
        inputstream = file.getInputStream();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

public void onUploadFile(ActionEvent actionEvent) {
    if (file != null && inputstream != null) {
        fileName = file.getFilename();
        StringWriter writer = new StringWriter();

    }
    if (inputFile != null) {
        inputFile.resetValue();
        inputFile.setValid(true);
    }
}

public void resetValue() {
    if (fileName != null)
        fileName = null;
    if (fileContent != null)
        fileContent = null;
    if (inputstream != null)
        inputstream = null;
}

public void setInputFile(RichInputFile inputFile) {
    this.inputFile = inputFile;
}

public RichInputFile getInputFile() {
    return inputFile;
}

public void setFile(UploadedFile file) {
    this.file = file;
}

public UploadedFile getFile() {
    return file;
}

public String getFileContent() {
    return fileContent;
}

public String getFileName() {
    return fileName;
}
}

当我 select 上传文件元素上的文件时，该文件被 selected 但不会触发 ValueChangeEvent 并且不会调用 onFileUploadValueChangeListener。 PPR 发生并且 RichInputFile inputFile 值仍然为空，在屏幕上显示 "No file selected"。 (绑定成功)

我应该更正什么才能在 af:inputFile 上触发 valueChangeEvent？

Answer 1

我找到答案了。

要触发 af:inputFile valueChangeEvent，必须用 af:form usesUpload="true" 标签包围它：

<af:panelGroupLayout id="pgl1" layout="horizontal">
 <af:form usesUpload="true" id="f1">
  <af:inputFile label="Upload File" id="if1"
                binding="#{viewScope.userBean.inputFile}"
                valueChangeListener="#{viewScope.userBean.onFileUploadValueChangeListener}"
                autoSubmit="true"/>
  <af:spacer width="10" height="10" id="s7"/>
  <af:commandButton text="Upload" id="cb1"
                    disabled="#{viewScope.userBean.inputFile.value == null ? true : false}"
                    partialTriggers="if1"
                    actionListener="#{viewScope.userBean.onUploadFile}"/>
  </af:form>
</af:panelGroupLayout>

Answer 2

如果我们在任务流区域上有一个表单并且 usesUpload="true" 它也有效吗？？

是的。

如果您在任务流区域上有一个表单，您应该找到 usesUpload="true" 并将其添加到该表单。它将添加到 html: enctype="multipart/form-data" 允许您上传文件，并且将捕获 valueChangeListener。

ADF af:inputFile 不使用 valueChangeListener 触发 ValueChangeEvent

ADF af:inputFile does not trigger ValueChangeEvent with valueChangeListener

jsf

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