ALV with Link to Action

This tutorial explains how to create a link to action in the ALV table.

Go to the DOINIT method of the view controller and set the properties for the ALV table. We can also do it in the DOINIT method of the component controller by adding the ALV controller usage to the properties of the component controller.

Let us proceed to create the first column as the link to action.

It is assumed that you have already created the ALV report.

Step 1: Instantiate the used component.

Coding will be generated as below.

This coding calls the method created for the component usage mentioned earlier in the post. It checks for th active component usage and if there is no active component usage then it creates one.

Step 2: Method call in the used controller.

The ALV table has an interface method called get_model which will return the ALV configuration model.

Call the get model method of the ALV component using the code wizard method call in used controller.

Codings will be generated as below.

The object reference for the ALV configuration table class is now contained in the variable LV_VALUE.

This class now contains a number of interfaces which contains method for setting the different properties of the ALV table.

In order to change the cell editor of the column, we will use the method get_column of the interface if_salv_wd_column_settings. This method will return the object reference to the column.

Using pattern call the get_column method of the interface.

Coding will be generated as below.

Modify the coding as below.

Now we have obtained the Object reference for the column using which we can set the cell editor of the column using the method set_cell_editor of the class cl_salv_wd_column.

This method requires an importing paramter with the generic type for the cell editor. We need to create a object of type of cell editor required and pass it to this method so that the corresponding type will be set as a cell editor to the column.

Every type of UI element has a class associated with it which begins with the name cl_salv_wd_uie_* . Create an object for that class and pass it to the set cell editor method of the class.

Call the method set text of the class for link to action to set the text for the hyper link.

Call the set cell editor method and pass the object for link to action to that method.

Coding will be generated as below.

Pass the object to it.

Save and activate the whole component and test the application.

Output:

Code:

* Instantiate the used component.

DATA LO_CMP_USAGE TYPE REF TO IF_WD_COMPONENT_USAGE.

LO_CMP_USAGE =   WD_THIS->WD_CPUSE_ALV( ).
IF LO_CMP_USAGE->HAS_ACTIVE_COMPONENT( ) IS INITIAL.
    LO_CMP_USAGE->CREATE_COMPONENT( ).
ENDIF.

* Method call in the used controller

DATA LO_INTERFACECONTROLLER TYPE REF TO IWCI_SALV_WD_TABLE .
LO_INTERFACECONTROLLER =   WD_THIS->WD_CPIFC_ALV( ).

DATA LV_VALUE TYPE REF TO CL_SALV_WD_CONFIG_TABLE.
LV_VALUE = LO_INTERFACECONTROLLER->GET_MODEL(
).

* Getting the object reference of the column.

DATA LO_EBELN TYPE REF TO CL_SALV_WD_COLUMN.

CALL METHOD LV_VALUE->IF_SALV_WD_COLUMN_SETTINGS~GET_COLUMN
    EXPORTING
      ID    = 'EBELN'
    RECEIVING
      VALUE = LO_EBELN.

* Creating an object of cell editor type required.

DATA : LO_LINK TYPE REF TO CL_SALV_WD_UIE_LINK_TO_ACTION.

CREATE OBJECT LO_LINK.

* Set the text for hyperlink

CALL METHOD LO_LINK->SET_TEXT_FIELDNAME
EXPORTING
    VALUE = 'EBELN'
    .

* Setting the cell editor of the

CALL METHOD LO_EBELN->SET_CELL_EDITOR
    EXPORTING
      VALUE = LO_LINK.

To proceed with the action of what has to happen next on the click of link we need to know the where exactly or what value the user has selected. Once we get to know that we can proceed with the action we want. Be it display the item details on a separate table or whatever the requirement is.

Now let me throw a message on what value the user has selected.

Go to the methods tab of the View controller and create an event handler method.

Assign the event handler method to the ON_CLICK event of the ALV component. Because this is the event triggered by the system when the user click on the Cell in the ALV component. By registering this event to our event handler method, our event handler method will be called when the user performs the action on the cell and what has to happen next can be controlled here.

If you see the importing parameter of this event handler method there will be an importing parameter call r_param which is a reference variable of some ALV Interface.

The attributes of this interface will provide us with the sufficient information which we need to know like which row, particular column in the ALV table the user has performed.

Attributes of this interface is as below.

The attribute Value will gives us the value of the cell that the user has selected. This attribute is of type data reference variable and we can get it in a field symbol.

Code as below in the event handler method: