Form( key: _formKey, child: Padding( padding: EdgeInsets.all(16), child: Column( children: [ TextFormField( decoration: InputDecoration(labelText: 'Book Name'), validator: (value) { if (value == null) { return 'Please enter book name'; } return null; }, onSaved: (value) => bookName = value!, ), TextFormField( decoration: InputDecoration(labelText: 'Book Author'), validator: (value) { if (value == null) { return 'Please enter book author'; } return null; }, onSaved: (value) => bookAuthor = value!, ), TextFormField( decoration: InputDecoration(labelText: 'Book Description'), validator: (value) { if (value==null) { return 'Please enter book description'; } return null; }, onSaved: (value) => bookDescription = value!, ), //for book Container( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Row( mainAxisAlignment: MainAxisAlignment.center, children: [ ElevatedButton(onPressed: (){ pickFile(); }, child: Text("Upload a Book")), if(pickedFile!=null) Icon(Icons.check, color: Colors.green), ], ), ], ), ),

          // for thumbnail
          Container(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Center(
                  child: isLoadingtb
                      ? CircularProgressIndicator()
                      :ElevatedButton(onPressed: (){
                    pickFile();
                  }, child: Text("Upload thumbnail")),
                ),
                if(pickedFiletb!=null)
                  SizedBox(height: 50, width: 50, child: Image.file(fileToDisplaytb!)),
              ],
            ),
          ),
          ElevatedButton(
            child: Text('Submit'),
            onPressed: () {
              if (_formKey.currentState!.validate()) {
                _formKey.currentState!.save();
                print(bookName);
                print(bookAuthor);
                print(bookDescription);
                // Submit the form and perform desired actions
              }
            },
          ),
        ],
      ),
    ),
  ),