Here is the example shows how to combine the toolbar and datagrid component together.
<eui-panel>
<div class="datagrid-toolbar">
<eui-linkbutton>Add</eui-linkbutton>
<eui-linkbutton>Edit</eui-linkbutton>
</div>
<eui-datagrid [data]="data" [border]="false" style="height:250px">
<eui-grid-column field="itemid" title="Item ID"></eui-grid-column>
<eui-grid-column field="name" title="Name"></eui-grid-column>
<eui-grid-column field="listprice" title="List Price" align="right"></eui-grid-column>
<eui-grid-column field="unitcost" title="Unit Cost" align="right"></eui-grid-column>
<eui-grid-column field="attr" title="Attribute" width="30%"></eui-grid-column>
<eui-grid-column field="status" title="Status" align="center"></eui-grid-column>
</eui-datagrid>
</eui-panel>