SQL Server, Error converting data type nvarchar to int

Server Error in '/Web' Application.

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Error converting data type nvarchar to int.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more @R_249_4045@ion about the error and where it originated in the code.
Exception Details: System.Data.sqlClient.sqlException: Error converting data type nvarchar to int.
Source Error:

An unhandled exception was generated during the execution of the current web request. @R_249_4045@ion regarding the origin and location of the exception can be identified using the exception stack trace below.

 

以上错误用单步调试不能发现错误，原来问题出现在 asp:sqlDataSource， ObjectDataSource， XMLDataSource 等。

用asp:sqlDataSource， ObjectDataSource， XMLDataSource ， Membership Database ，后患无穷。