Web dynpro ALV requirement with search help

Hello Experts,
I developed a custom transaction in Web dynpro. It has an ALV display in editable mode where the user can enter Material number, plant, quantity and Batch as input fields for Production confirmation.
There is a requirement to add a search-help to BATCH field similar to the one that appears in std. MFBF transaction. Basically what it means is that I will have to capture the material, plant of that line in ALV table and get the stock and batch details from MCHB table and provide them in search help.
I created a dictionary search help with a search-help exit FM that will extract the details from MCHB table. I am having trouble in extracting the line index to get the material number and plant values from the view to export.
Please help me as to how to extract the line index of an ALV table for which the F4 help was clicked.
Also it would be great if I could find a much simpler and better approach to handle the requirement.
Regards
Pratyusha

Hi,
If you have set the help mode as dictionary search help in your context, and if you have defined your search help to have these importing and exporting parameters, then it will work without you doing anything else. Provided you have mentioned the name of the search help in the structure definition itself. You do not have to write explicit event handlers for dictionary search helps.
Or else, you can use an OVS search help. In that case, in the OVS event handler, you will have a parameter ovs_callback_object. Ovs_callback_object->context_element will give you the element on which the F4 was clicked. If you do a get_static_attributes on that, you will get the values of each attribute. Then you can call your function module to get the Batch field. I think OVS will suit your requirement. You can see examples of OVS in the component demo_value_help in the package swdp_demo.
Hope this helps.
Regards,
Nithya

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Web dynpro ALV requirement with search help

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