I have a button that when clicked, will create a JSONstore using a url provided. The store is then loaded into a grid. If the button is clicked again, it adds all the information again (so it is listed twice). I want it so that when the user clicks the button, it clears the store/grid and then adds everything.

Any ideas on how to accomplish this?

Thanks,

**EDIT**
ExtJS 3

```
datasetStore.removeAll();
datasetStore.loadData(datasetsArray);

```