Vaadin Grid Iterate all rows and print values of each column

Vaadin 6 / 7 / 8
1

Hi i m using Vaadin 8.1.0

and Trying to print the values of each row i m not able to print . can anyone help this.

Here is my code

Grid grid = new Grid<>();
grid.setWidth(“100%”);
grid.setColumnReorderingAllowed(true);
grid.setSelectionMode(SelectionMode.SINGLE);

ArrayList personDataList = new ArrayList();
for (int i = 0; i <= 15; i++) {
PersonData p = new PersonData();
p.setId(100);
p.setName(“AAA”);
p.setWeight(50.20);
p.setDob(new Date());
personDataList.add(p);
}

grid.addColumn(PersonData::getName).setCaption(“Name”);
grid.addColumn(PersonData::getWeight).setCaption(“Weight”);
grid.addColumn(PersonData::getDob, new DateRenderer(new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”)))
.setCaption(“DATE”);
grid.setItems(personDataList);

below is how i am trying to read data

List<Column<PersonData, ?>> s=grid.getColumns();
Column<PersonData, ?> c=s.get(0);

How can i get values of each column.

Regards
Nagaraj RC

2

You need to get the Grids DataProvider (there is getDataProvider), which in default case is ListDataProvider. Check the API of ListDataProvider how to iterate values.

https://vaadin.com/api/8.1.1/com/vaadin/data/provider/ListDataProvider.html

E.g. getItems() is a good start.

3

HI Tatu Lund

Thanks for your answer i tried ur way as below

ListDataProvider s=(ListDataProvider) grid.getDataProvider();
ArrayList s1=(ArrayList) s.getItems();
System.out.println(“Value=”+s1.get(0).getId());

This is giving me the proper values.
but when i pass other POJO class insted of PersonData that will have other field insted if getId() .
is there a way that i can get the data by column.
i am trying to export the complete Grid data into excel file including column names also.

Regards
Nagaraj RC

4

Hello,

Did you figure any way to do this? I have a similar issue at hand.

5

Hi Guys,

Any solution for the above problem. I am having the same problem as Nagaraj RC. I need to migrate all the grid data to excel. Please let me if you have solutions. Thank you.

6

How about having all you Pojos derive from the same base class ?