How to add F4 Value Help to the input parameters of the report in the ABAP report

In the previous article of this tutorial, Reading local text file content with ABAP, we have learnedHow to read the local file to the ABAP server, the file we used at that time contained 1 2 3 4 this simple content that did not involve character encoding, and the file path was also hard-codedC:\temp\1.txt.

In this step, we make enhancements on this basis.

First, we use the PARAMETERS keyword to define an input parameter of an ABAP report, the name is path, and the type is string, which is used to specify which local file we want to upload to the ABAP server.The path parameter stores the absolute path of the local file to be uploaded on the operating system.Modified with OBLIGATORY, which means that the parameters are required and must be maintained, otherwise the ABAP program cannot continue to execute.

We select the menu Goto -> Text Elements:

Switch to Selection Texts, you can see the PATH variable displayed under the Name column, its Text is ?.... We can maintain some explanatory text here, to increase the readability of this parameter.