ADF af:inputFile 不会通过 valueChangeListener 触发 ValueChangeEvent

Question

我尝试将 RichInputFile 与 viewScopeBean 绑定失败。

这是我的代码：

杰夫：

<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 ：

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;
}
}

当我在上传文件元素上选择文件时，会选择该文件，但不会触发 ValueChangeEvent，并且不会调用 onFileUploadValueChangeListener。发生PPR，RichInputFile inputFile 值仍然为空，屏幕上显示“No file selected”。（绑定成功）

我应该纠正什么才能在 af:inputFile 上触发 valueChangeEvent ？

Answer 1

我找到了答案。

要触发 af:inputFile valueChangeEvent，必须将其包含在 af:form useUpload="true" 标签中：

<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>