How can I bring toolbar if it is not there?

[ruchabhutada]

I want toolbar in grid view. how can I bring that ?
I m putting code like this:
var obj = {
editModel: { clicksToEdit: 2 },
scrollModel: {autoFit: true},
showTop: false,
refreshView:true,
showBottom: true,
toolbar : {
items: [
{ type: 'button', label: 'Add', icon: 'ui-icon-plus' },
{ type: 'button', label: 'Edit', icon: 'ui-icon-pencil' },
{ type: 'button', label: 'Delete',icon: 'ui-icon-minus' }
]
},
dataModel: { data: arrayData}
};
What else code I have to put.??
But I m not able to see toolbar.
Please help me sir. Please sir.!!

[paramquery]

showTop should be true.

[ruchabhutada]

working very fine
Thank you so much sir!!