Now I want to create a mashup which is used to view problem report in windchill .How can I do to realize it ?
Are you using the Windchill extension? Have you looked in the Navigate guide? http://support.ptc.com/WCMS/files/169151/en/PTCNavigate.pdf
Please refer to page 100 of the above-mentioned guide.
A very simple/basic outline would be:
1. Create a service that returns an infotable result with reports
2. Create a mashup, add -for example- a grid widget.
3. Add your customer service from step 1 onto the mashup and bind All Data to the grid.
4. View the mashup.
You may alter this to add filters, selections, etc but the outline just to provide you a general reference/give an idea.