refresh combogrid

[Ellipsis]

How do I reload the data in the combogrid?

I tried retrieving the grid object (.combogrid('grid')) and on this object Itried calling a load with new parameters.... No luck  (.combogrid('grid').datagrid('load',{parameter:value})

[stworthy]

It seems that there are no problems with your codes.

[Ellipsis]

Strange,  could you make a jsfiddle example please?

[stworthy]

Here is the jsfiddle example:
http://jsfiddle.net/zkQ3X/

[Ellipsis]

Thank you, this example works fine.

But what I was looking for was with the use of an external JSON source.

Nothing happens: 
jQuery('#pfx_classSearchField').combogrid('grid').datagrid('load',{catalogNumberOrDescription:courseDataArray['Studiegidsnummer']});

[stworthy]

As a demonstration, loading external data source can not be hosted on jsfiddle. But these have no more differences.
Please check if the request parameter can be posted to server correctly when calling 'load' method. If so, make sure your server can receive this parameter and return the corresponding data back to browser.

[Ellipsis]

Ok got it working, thank you.