X++ | d365FO - Create a list of table name lookup

This is very similar to X++ | d365FO - Create a lookup with a table fields list. Just show another example which looks quite simpler.

Scenario / expected result
We have a string control on a form, then we'd like to have a lookup which shows all of table name from AOT.

Solution
The overview processes are:

1. Create a temp table with metadata-populate method
2. Add a lookup method to the table that will be a form's data source
3. Add a lookup method on the form's control

1. Create a temp table with metadata-populate method

Create 'aaaTableNameListTemp' table. Set it as InMemory table. Add a string 'TableName' field (extends from IdentifierName or else you want).

Create 'populate' method

 using Microsoft.Dynamics.AX.Metadata.MetaModel;  
 public class aaaTableNameListTemp extends common  
 {  
   public static aaaTableNameListTemp populate()  
   {  
     aaaTableNameListTemp table;  
     var tables = Microsoft.Dynamics.Ax.Xpp.MetadataSupport::TableNames();  
     while (tables.MoveNext())  
     {  
       table.clear();  
       table.initValue();  
       table.TableName = tables.Current;  
       table.insert();  
     }  
     return table;  
   }  
 }  

2. Add a lookup method to the table that will be a form's data source

For example, if our table is 'aaaTable' table. Add 'lookupTableName' method on that table.

   public void lookupTableName(FormStringControl _control)  
   {  
     SysTableLookup    lookup;  
     QueryBuildDataSource qbds;  
     Query q = new Query();  
     qbds = q.addDataSource(tableNum(aaaTableNameListTemp));  
     qbds.addSortField(fieldNum(aaaTableNameListTemp, TableName), SortOrder::Ascending);  
     lookup = SysTableLookup::newParameters(tableNum(aaaTableNameListTemp),  
              _control,  
              true);  
     lookup.addLookupField(fieldnum(aaaTableNameListTemp, TableName), true);  
     lookup.parmQuery(q);  
     lookup.parmTmpBuffer(aaaTableNameListTemp::populate());  
     lookup.performFormLookup();  
   }  

3. Add a lookup method on the form's control

On your desired control, override 'lookup' method and put the below code.

   [Control("String")]  
   class Grid_FormName  
   {  
     public void lookup()  
     {  
       aaaTable.lookupTableName(this);  
     }  
   }  

That's all!



Ref: thanks Ajt for a useful post Metadata Lookup - list of forms in D365.