fix null parameter being mistaken for the string type#690

Merged

mikependon merged 3 commits intomasterfrom fix/set_parameter_DbType

Jan 2, 2021

Commits on Dec 31, 2020

Always try to set the DbType of the pameter to avoid the null value being mistaken for the string type.
fredliex
committed

Commits on Jan 2, 2021

Use ClientTypeToDbTypeResolver instead of TypeMapper.fallback.
fredliex
committed
DbCommandExtension also complements the fallback processing of DbType.
fredliex
committed