Bug#103864: When creating a custom entity in the lower layer, you have to create the properties for the entity.
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Of course, then you'll have to write your own code to implement movement
throughout the list of orders and the saving of changes.
You can follow along by examining the sample Word document named
CustomerEntry. Also keep in mind that a Package object is a disposable
object and should be managed accordingly. A Closer Look at
RelationshipsThe structure of a package in the Office Open XML File
Formats is heavily dependent upon relationships. I then added a data
source for the Customer entity.
Once the control is automatically created by dragging a data source to
the form, you can delete it from the form with no ill effects. In our
sample application, our host provides an SDK to add-ins in order to use
them as a service; in this case, it will use the add-in to implement
simple calculator functions. NET enterprise application using data
binding. Our AddInStore class is used in determining what can connect to
what. All the controls are bound to the same data source via a
BindingSource control. All I need to do is drag the Customer data source
over the CustomerID ComboBox and drop it.
xml part that support data entry and data binding.
In theory, it's simple. This first column will cover all the challenges
developers face when they first add extensibility to their application
and how our APIs make their lives easier.
First, I grab a reference to the list of Order entities from the
BindingSource to make the code easier to read.
I still need to fill the ComboBox with a list of customers and display
the customer's CompanyName.
Therefore, it's possible to write an application that inspects a package
and displays all the parts inside of it.
However, you should keep in mind that the relationship hierarchy of
parts can grow to an arbitrary number of levels with child parts having
child parts having child parts, and so on.
The sample application includes two projects: one for the presentation
of the data and another for the business logic and data access.
This created a DataGridView control on the form that contained a column
representing each of the Order entity's properties. Since I dropped the
data source on ComboBox, it was smart enough to know that I did not need
another BindingNavigator control.
I call the SetupBindings method in the form's constructor so the data is
retrieved, bound, and displayed when the form is first loaded. If those
components are not known at build time, which is typically the case for
add-ins, then things become much more difficult. The Customer class in
this example implements the INotifyPropertyChanged interface that raises
an event called PropertyChanged if the CompanyName property changes. So
I went back to the Data Sources window, clicked on the Order data
source, changed the selection to DataGridView and dragged the Order data
source onto the form.
Since I dropped the data source on ComboBox, it was smart enough to know
that I did not need another BindingNavigator control. In this
application, I'll use custom entities.
I then added a data source for the Customer entity. If you are new to
working with the Office Open XML File Formats you should read my
November column before continuing here because this column builds on the
topics I discussed there.
This is all the code that's required in the UI to allow the user to
navigate and view the data. Imagine you want to write the code to open
an existing . SummaryThis month's column has continued my examination of
working with the Office Open File Formats.
The BindingNavigator's buttons are also controls so they have properties
and events you can set, too. NET Framework packaging API.
The Customer class in this example implements the INotifyPropertyChanged
interface that raises an event called PropertyChanged if the CompanyName
property changes. When a user updates the data in a content control and
saves the document, those changes are written back to the user-defined
XML file.
The Delete method grabs the current order from the BindingSource's
Current property and casts it to the entity type Order. Developers often
have questions when extending their applications. Data Points: Data
Bound Applications with ADO. Once you have dynamically built the URI for
the target part, you can call the GetPart method. xml to the console
window. First, you must create a new package file using the Package
class exposed by the WindowsBase assembly that is part of the . In this
series of columns we will walk you through the development lifecycle of
adding extensibility to an application and then versioning it over time.
NET to get the data from the database; the custom entities are then
filled and returned to the presentation layer.
However, when actually building one of these documents yourself, you
should change the extension of the . All of these controls can be added
to a Word document. Calling the GetRelationships method on the Package
class allows the application to enumerate through all the top-level
parts inside the package.
I changed both the CustomerID and the EmployeeID properties to be
ComboBoxes.
It provides an elegant solution to separating your data from the
presentation of that data.
Before we go into detail about using an add-in at run time, let's talk
about the SDK and defining the object model that a host provides to its
add-ins.
We define these components in what we call a "pipeline": the host's
view, the add-in's view, and the contracts that cross the isolation
boundary.
Let's start with a simple example.
While it might take some time to become fluent with the technique of
manually constructing Word documents that contains user-defined XML
files and bound content controls, it is worth the effort. However, when
working in the new format, content controls can be added to provide user
input elements into a Word document. After finding the correct
PackageRelationship object, the code dynamically builds the URI to the
target part using the PackUriHelper class provided by the . Once you
have created a minimal Word document with bound content controls, you
can do the rest of your work for making the document look professional
directly within Word. It will take an investment on your part if you
want to generate the XML required to create documents from scratch that
contain things like tables, graphics, and formatting.
It provides an elegant solution to separating your data from the
presentation of that data.
These controls can be changed by clicking on the property name's text in
the Data Sources window and selecting a different control from the
dropdown list.
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