Unable to create a constant value of type 'System.Object'. Only primitive types or enumeration types are supported in this context
2016-07-19 15:20
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把Equals改成 ==的写法就可以了,
query = query.WhereIf(m => m.VendorId==search.VendorId, !string.IsNullOrEmpty(Convert.ToString(search.VendorId)));
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