How Do I Load A Datagrid When I Change Tabs?

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C#

For example, i have 3 tabs with 3 diferent datagrids;
- tabPage1, tabPage2 and tabPage3;

And this datagrids:

- Dgv1, Dgv2 and Dgv3. Each "Dgv" is assigned to a single tab on my Windows Forms application.

The problem I'm facing is the fact that i want to load the datagrid when i click on a certain tab, for example:

When i click tabPage2 i want it to load the Dgv2 and the corresponded Parameterized queries!

Any ideias?