Microsoft Office Tutorials and References
In Depth Information
not only is the external list populated, you can also select an item to view and edit (Figure 4-31 ). When the view
option is selected, the ReadItem method will be triggered and the selected identifier id (item id) is passed to the
function as a parameter. When the edit option is selected, the Update method is called and the identifier id (item id)
and the entity (row data) are passed as parameters.
Figure 4-31. You can view or edit an item using the ECB menu on the external list
When you change any entity value, type descriptor, assembly name, or namespaces and redeploy the solution
on an existing eCt, it is recommended you delete the external list and re-create it. When you get an error, however, the
first place to look is under %program Files%Common Files\Microsoft shared\Web server extensions\15\LoGsfolder.
Note
you must have noticed that an external list looks similar to a normal sharepoint list, but it’s not exactly the same.
table 4-1 provides a comparison.
Table 4-1. External Lists vs. Normal SharePoint Lists
External List
Normal/Custom SharePoint List
Requires an external content type to create an external list,
and holds data related to the external source.
Can use existing content type, and holds data related
to data within the list.
Can read and write to external data.
Can read and write to data within the list.
Can create an external list using SharePoint Designer or a
SharePoint site.
Can create a custom list using SharePoint Designer
or a SharePoint site.
Default views and forms are created to display and edit
external data when the external list is created.
Default views and forms are created to display and
edit list data when the custom list is created.
Can create custom actions and initiate workflows.
Can create custom actions and initiate workflows.
Can be used with SharePoint Workspace or Outlook to
display external data.
Can be used with SharePoint Workspace or Outlook
to display external data.
Customize forms using InfoPath.
Customize forms using InfoPath.
Does not allow management of non-external content types.
Allows management of content types.
Versioning is not supported.
Supports versioning on items.
Can’t add additional columns unless the ECT is changed.
Can create columns or use existing site columns.
 
 
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