我使用上传组件
资源 ..
upload = new Upload(" ", new Upload.Receiver() {
@Override
public OutputStream receiveUpload(String filename, String mimeType) {
FileOutputStream fos = null ;
if(filename.length() > 0){
try {
tempFile = File.createTempFile(filename, ".txt", new File("/home/nap/scroll/") ) ;
} catch (IOException e) {
e.printStackTrace();
}
try {
fos = new FileOutputStream(tempFile) ;
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}else{
Notification.show(Messages.getString(Messages.Dialog_No_Selected_File),
"-",
Notification.Type.WARNING_MESSAGE);
portletUI.rePrint(request);
initListSelect();
}
return fos ;
}
});
我想禁用上传按钮 – 不是文件选择按钮.
当我单击文件选择按钮并没有选择文件时,
上传按钮禁用状态.
我试过upload.setButtonCaption(null),但Exeption … TT
如何禁用上传按钮?
最佳答案 我不知道如何禁用提交按钮,但您可以先隐藏它并在用户选择要上载的文件时进行渲染.
ImageUploader receiver = new ImageUploader();
Upload upload = new Upload("Upload", receiver);
upload.setButtonCaption(null);
upload.addChangeListener(new ChangeListener()
{
@Override
public void filenameChanged(ChangeEvent event)
{
if (event.getFilename() != null)
upload.setButtonCaption("Lets go");
}
});
我希望这有帮助!