I didn't want to use the 'Update Model from Database' since it will update every table and view in my model, reverting all the entity and property names to the database naming convention and breaking all my referencing code. Too much pain for what should be quite a simple change? Yes, I think so.
Solution
As an example let's say you have added a varchar(50) column calledMyDbColumn
to MyDbTable
that currently has an entity modelled called MyEntity
that hasn't recognised this column which you want to be called MyProperty
.Let's also say you have added
MyProperty
of type String with MaxLength set to 50 to your MyEntity
entity. If not, do that. Now the tough bit: Mapping it to the database without a full update.Time to leave the comfort of the UI.
- Right click your edmx file in the Solution Explorer
- Select 'Open With...'
- Select 'XML (Text) Editor' and click OK (you may be asked to close any open instances of the edmx file)
- Search for where is says
<EntityType Name="MyDbTable">
- Add the property
<Property Name="MyDbColumn" Type="varchar" MaxLength="50" />
- Search for <EntitySetMapping Name="MyEntity">
- You can find all your other mapped properties within a 'MappingFragment' element.
- Add your new mapped column
<ScalarProperty Name="MyPropertyName" ColumnName="MyDbColumnName"/>
- Save & Build
If you now re-open your edmx file in the designer and take a look at the Mapping Details for
MyEntity
you will see that MyProperty
is mapped to MyDbColumn
in MyDbTable
. Lovely stuff!
Thanks a lot . very useful
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After you do this, open the EDMX in the designer and manually add each property:
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