Security

  Lookup of User Identity

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Lookup of User Identity

Both name and id of a user selected in a lookup window can be captured in a database table when necessary. Let’s set up a lookup field to capture both properties of the user identity.

Start SQL Server Management Studio. In the Object Explorer, right-click Database / Northwind / Tables / dbo.Orders table node, and select Design option.

Design Orders table in the Northwind database using SQL Server Management Studio.

Add two columns with the following settings:

Column Name Data Type Allow Nulls
OwnerID uniqueidentifier True
OwnerName nvarchar(50) True

Save the table modification. Refresh the Orders controller.

Refresh the Orders table.

Regenerate the project. Navigate to the Orders page, and edit a record. The OwnerID and OwnerName fields will be visible at the bottom of the form, but are currently only simple text boxes.

OwnerID and OwnerName fields are rendered as simple text boxes.

Let’s configure the OwnerID field as a User Id Lookup and have it copy the user name into OwnerName field. The OwnerName will become an alias of OwnerID data field. Only Administrators will be allowed to modify the owner of the record.

Start the Project Designer. In the Project Explorer, switch to the Controllers tab. Double-click on Orders / Fields / OwnerID field node.

OwnerID field in the Orders controller in Code On Time Project Explorer.

Make the following changes:

Property New Value
Items Style User Id Lookup
Copy OwnerName=UserName
“Write” Roles Administrators

Press OK to save the field. In the Project Explorer, double-click on Orders / Views / editForm1 / c1 – Orders / OwnerID data field node.

OwnerID data field of editForm1 view of Orders controller.

Assign an alias for the data field:

Property New Value
Alias OwnerName

Press OK to save the data field. In the Project Explorer, right-click on Orders / Views / editForm1 / c1 – Orders / OwnerName data field node, and select Delete option.

Delete OwnerName data field of editForm1 view in Orders controller.

Confirm the operation. On the toolbar, select Browse option to regenerate the web application.

Navigate to the Orders page, and edit a record. If your user account belongs to the Administrators role, then the field is rendered as a lookup.

OwnerName field rendered as a User Id Lookup.

Activate the lookup, and a lookup window will open and display a list of users.

List of users displayed in the lookup window.

Select a user from the lookup, and the name of the user will be copied into the field Owner Name.

User Name inserted into the Owner Name field.

Save the field. If you look at the record in the database, both UserId and UserName fields have been populated.

Both UserID and UserName have been inserted into the record.

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