UnrealEngine4: Make a Drop Down for the Details Panel

.H


#include "Runtime/Engine/Classes/Engine/DataTable.h"

USTRUCT(Blueprintable)
struct FEventListDataTable : public FTableRowBase
{
    GENERATED_USTRUCT_BODY()
    /** Full Path of Blueprint */
    UPROPERTY(BlueprintReadOnly, Category = "EVT")
        int32 EventFlowID;
    UPROPERTY(BlueprintReadOnly, Category = "EVT")
        int32 EventCatID;
    UPROPERTY(BlueprintReadOnly, Category = "EVT")
        int32 EventID;
};



/**
 *
 */
//UCLASS()
UCLASS()
class AAI_NPC_Character : public AAI_Character
{
    GENERATED_UCLASS_BODY()

    TArray<FEventArrayStruct*> EventList;

    UPROPERTY()
        UDataTable * eventDatatable;

    //This will show up in the details panel as a TArray when you add a new element it
    //will populate the rows table with the events data from the query in the loadEventListStrutData function.
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Default_Events")
        TArray<FDataTableRowHandle> EventListSelection;


//...
//...
//...
//...


Cpp:

void AAI_NPC_Character::loadEventListStrutData(){

    //begin Build Databale String
    int32 result = 0;
    FString SQLQuery = "";
    FString TableString;
    TArray<FString> err;
    TableString = FString(",EventFlowID,EventCatID,EventID\n");


    RPG_DATABASE_CONTROLLER = NewObject<URPG_Database>(this, URPG_Database::StaticClass());
    if (!OpenDatabase(SourceDataBase))return;
    /*TODO: Add event filtering*/
    SQLQuery = "Select EventName, EventID, EventCategoryID, EventFlowGroupID from events;";

    result = RPG_DATABASE_CONTROLLER->BP_Query(SQLQuery);

    if (result == 0 || RPG_DATABASE_CONTROLLER->BP_EndOResult(result))
    {
        if (result)RPG_DATABASE_CONTROLLER->BP_ClearResult(result);
        RPG_DATABASE_CONTROLLER->BP_CloseDatabase();
        return;
    }
    else{

        while (!RPG_DATABASE_CONTROLLER->BP_EndOResult(result))
        {
            FString _EventName = (*RPG_DATABASE_CONTROLLER->BP_GetColumn(result, "EventName"));
            FString _EventID = (*RPG_DATABASE_CONTROLLER->BP_GetColumn(result, "EventID"));
            FString _EventCatID = (*RPG_DATABASE_CONTROLLER->BP_GetColumn(result, "EventCategoryID"));
            FString _EventFlowID = (*RPG_DATABASE_CONTROLLER->BP_GetColumn(result, "EventFlowGroupID"));

            TableString += FString(_EventName + "," + _EventFlowID + "," + _EventCatID + "," + _EventID + "\n");
            RPG_DATABASE_CONTROLLER->BP_NextRow(result);
        }
    }

    if (eventDatatable == nullptr)eventDatatable = NewObject<UDataTable>(this, "EListDataTable");
    eventDatatable->RowStruct = FEventListDataTable().StaticStruct();

#if WITH_EDITORONLY_DATA
    err = eventDatatable->CreateTableFromCSVString(TableString);
#endif
    if (err.Num() > 0)
    {
        for (FString tmp : err)UE_LOG(LogTemp, Error, TEXT("%s"), *tmp);
    }else{
        for (int32 i = 0; i < EventListSelection.Num();i++){
            EventListSelection[i].DataTable = eventDatatable;
        }
    }
}