No mapping exists from object type system.collections.generic.list`1 to a known managed provider native type.

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I have passed ids list as parameter to Store procedure but when cal storeprocedure got the error
"No mapping exists from object type System.Collections.Generic.List`1[[System.Nullable`1[[System.Int64, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] to a known managed provider native type."

C#

var idsparam=new sqlparameter
{
  parameterName="Ids",
  value=request.ids
}
var _addressSetiingspredicate=_dbcontext.database.SqlQuery<BaseNewBusinessAdressSettingModel>(@"Exec SP_AdressSettings @Ids",idsparam).ToList<BaseNewBusinessAdressSettingModel>

Please help me
Thanks

What I have tried:

I have passed ids list as parameter to Store procedure but when cal storeprocedure got the error
"No mapping exists from object type System.Collections.Generic.List`1[[System.Nullable`1[[System.Int64, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] to a known managed provider native type."

Posted 23-Sep-20 20:02pm

Krishna Veni

Updated 23-Sep-20 20:22pm

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F-ES Sitecore 24-Sep-20 5:41am

What sql type is the param for SP_AdressSettings?

1 solution

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OriginalGriff · Answer 1 · 2020-09-23T20:23:00

Solution 1

You are trying to pass a collection of integers as a single parameter value to SQL: probably from here:

C#

value=request.ids

You can't do that: SQL has no concept of arrays or Lists it only works with basic datatypes: Data types (Transact-SQL) - SQL Server | Microsoft Docs[^]

I have no idea what your SP expects to do with them, but you can't send them as a collection!

Posted 23-Sep-20 20:23pm

OriginalGriff

Comments

Krishna Veni 24-Sep-20 2:44am

I need to pass the list of integers as parameters to sp.

OriginalGriff 24-Sep-20 3:03am

You can't: the SP doesn't have a parameter type that takes a collection of integers - just the basic datatypes that I linked to.
You need to rethink what exactly you are doing.