It's a viewstate issue. Which event are you using to create the GridView? Read about the page lifecycle and viewstate management. ASP.NET will not maintain viewstate for controls created after viewstate events in the page life cycle. :) Navaneeth How to use google | Ask smart questions

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kaushik_Manoj wrote: because an optional resource assembly containing it cannot be found You need to find out what that assembly is and why it cannot be found led mike

Sorry, please clarify what you are trying to do - whatever it is though, if it's to do with NTFS I suspect it's not an ASP.NET question. Bob Ashfield Consultants Ltd

Theres no reliable way to get this information short of testing the connection. Obviously you'll get a different answer every time so you'd have to get an average some how. In short, its tricky and if its just for a progress bar don't bother (I don't see any way you could get it to work in this scenario anyway)