Integration of the ALV in Your
Application 
Purpose
If you want to use an ALV output in your application, you have to perform various steps, depending on what you want to achieve. The following variants show only the most important ways in which you can call the ALV:
· Simple call without ALV configuration model
You only display an ALV output. You do not want to make any changes.
· Simple call with ALV configuration model
You want to change the standard output using your application. To do this you require the ALV configuration model.
· ALV output in external view without ALV configuration model
ALV output is just one element of many in a view. You do not want to change the ALV output. You do not need the ALV configuration model.
· ALV output in external view with ALV configuration model
ALV output is just one element of many in a view. You want to change the standard output using your application. To do this you require the ALV configuration model.
You will recognize the majority of the steps listed below from your work with the Web Dynpro components. Some of them, however, are tailored specifically for use with the ALV.
Prerequisites
You must perform the following (ALV-independent) steps for all the above listed scenarios:
·
You 
generate a Web Dynpro
component for your application and save it as active.
·
You generate
a context
node with the cardinality 0..n. The
structure of the attributes in this context node (name and data type) and the
structure of the internal data table that you connect to this context node in
the next step match.
·
You connect
your internal data table to the context node (for example, using the supply
method). In doing so, you use the method BIND_TABLE from the interface IF_WD_CONTEXT_NODE.
·
You provide
the DATA context node in the ALV interface controller with your application
data using external context
mapping.
Process Flow
Simple call without ALV configuration model
...
1.
You define a
component
usage for the ALV component SALV_WD_TABLE in your application component.
In doing so, you specify a name for the component usage (for example,
MY_ALV).
2.
You embed
the TABLE view of the ALV component SALV_WD_TABLE into a window of your
component.
Simple call with ALV configuration model
...
1.
You define a
component
usage for the ALV component SALV_WD_TABLE in your application component.
In doing so, you specify a name for the component usage (for example,
MY_ALV).
You also
define this component usage in your component controller. Since you need the
ALV configuration model for your modifications, choose the with controller
access variant (component interface).
2.
You embed
the TABLE view of the ALV component SALV_WD_TABLE into a window of your
component.
3. To configure the ALV output, two more steps are necessary:
¡
You instantiate the
used ALV component in a method of the component controller (for example,
WDDOINIT).
¡ You get the ALV configuration model and with it the object model, as well as all field objects and column objects.
The description of all the classes and methods of the ALV configuration model can be found in the system in the package SALV_WD_CONFIG.
ALV output in external view without ALV configuration model
...
...
1. You decide whether you require the context node in the component controller or in the context of your application view. If necessary, you generate an appropriate context node in your view and map the context node from the component controller to it.
2.
You define a
component
usage for the ALV component SALV_WD_TABLE in your application component.
In doing so, you specify a name for the component usage (for example,
MY_ALV).
You also
define the usage of this component in the properties for your view. Since you
do not need the ALV configuration model, choose the without controller
access variant (no component interface).
3.
You generate
the UI element ViewContainerUIElement
in the layout
of your view at the required position.
4. You have already embedded your view in the window of your application. Underneath this, you can see the name of the UI element ViewContainerUIElement that you have prepared in the previous step for the ALV output. You then embed the TABLE view for the SALV_WD_TABLE ALV component under this entry.
ALV output in external view with ALV configuration model
...
...
1. You decide whether you require the context node in the component controller or in the context of your application view. If necessary, you generate an appropriate context node in your view and map the context node from the component controller to it.
2.
You define a
component
usage for the ALV component SALV_WD_TABLE in your application component.
In doing so, you specify a name for the component usage (for example,
MY_ALV).
You also
define the usage of this component in the properties for your view. Since you
need the object model for your modifications, choose the with controller
access variant (component interface).
3.
You generate
the UI element ViewContainerUIElement
in the layout
of your view at the required position.
4. You have already embedded your view in the window of your application. Underneath this, you can see the name of the UI element ViewContainerUIElement that you have prepared in the previous step for the ALV output. You then embed the TABLE view for the SALV_WD_TABLE ALV component under this entry.
5. To configure the ALV output, two more steps are necessary:
¡
You instantiate the
used ALV component in a method of your view (for example,
WDDOINIT).
¡ You get the ALV configuration model and with it the object model, as well as all field objects and column objects.
The description of all the classes and methods of the ALV configuration model can be found in the system in the package SALV_WD_CONFIG.