Hi!
I have developed a webpart that uses a repeater control (I´m using a sandbox project). With some elements works well, but when I have mora than 30 elements the next exception is raised:
Value cannot be null.
Parameter name: path1
at System.IO.Path.Combine(String path1, String path2)
The behavior suposed to be: select some values from multiple dropdownlists, click a button that retrieves some information and attach a datasource to the repeater control. The first time that I click the button works fine, but if I do something that trigger a postback behavior I get an error message (the exeption that I already mentioned).
I have done some research and I foud that sandbox solutions have multiple restrictions, and in this case is the amount of data that is posted. I have read that the limit is 128kb.
Does anybory knows if it´s possible to clean the posted data via javascript, or clean the repeater´s datasource with javascript in order to 'clean' posted data and then the webpart would be able to execute again a postback process without any error???
Also I have read that if I add a tag in the web.config file ( <httpRuntime requestLengthDiskThreshold = “N″ /> ) the problem is fixed, but in my case I cannot modify the web.config file.
Thanks for your comments/suggestions.
eluisses