System.InvalidCastException: Unable to cast object of type SqlDataProvider to type DataProvider

Error: Edit Content is currently unavailable.

DotNetNuke.Services.Exceptions.ModuleLoadException:

The type initializer for

'M2Land.Modules.FlashImageRotator.DataProvider' threw an exception.

---> System.TypeInitializationException: The type initializer for

---> System.InvalidCastException: Unable to cast object of type

'M2Land.Modules.FlashImageRotator.SqlDataProvider' to type

'M2Land.Modules.FlashImageRotator.DataProvider'. at

M2Land.Modules.FlashImageRotator.DataProvider.CreateProvider() in

E:"Development"DotNetNuke"InstallArea"DotNetNuke_04.08.03_Source"Website"DesktopModules"M2Land.FlashImageRotator"Provider"DataProvider"SqlDataProvider"DataProvider.cs:line

55 at M2Land.Modules.FlashImageRotator.DataProvider..cctor() in

49 --- End of inner exception stack trace --- at

M2Land.Modules.FlashImageRotator.DataProvider.Instance() at

M2Land.Modules.FlashImageRotator.FlashImageRotatorController.GetFlashImageRotator(Int32

ModuleId) in

E:"Development"DotNetNuke"InstallArea"DotNetNuke_04.08.03_Source"Website"DesktopModules"M2Land.FlashImageRotator"Provider"DataProvider"SqlDataProvider"FlashImageShowController.cs:line

111 at

M2Land.Modules.FlashImageRotator.EditFlashImageRotator.Page_Load(Object

sender, EventArgs e) in

E:"Development"DotNetNuke"InstallArea"DotNetNuke_04.08.03_Source"Website"DesktopModules"M2Land.FlashImageRotator"EditFlashImageRotator.ascx.cs:line

68 --- End of inner exception stack trace ---

原因是这个项目是从StartKit迁移过来的，在App_Code下有同名的DataProvider和SqlDataProvider文件，所以反射时得到的类型不匹配。

删除App_Code中同名DataProvider和SqlDataProvider文件解决问题。