EditTables – Getting multi-select data the easy way

In previous versions of OpenInsight the usual way of accessing data from a multi-row select EditTable control was to get the SELPOS property and then iterate over the data pulling out the rows, e.g. something like this (not optimized, but you get the idea):

   SelPos   = Get_Property( CtrlEntID, "SELPOS" )
   DataList = Get_Property( CtrlEntID, "LIST" )
   SelList  = ""

   SelRows  = SelPos<2>
   SelCount = FieldCount( SelRows, @Vm )  
   For SelIdx = 1 To SelCount
      SelRow = SelRows<0,SelIdx>
      SelList<-1> = DataList<SelRow>
   Next

However, in OpenInsight 10 we added a couple of new properties that allow you to access data in a multi-row select EditTable in a faster and more efficient way. These are:

  • The SELLIST property
  • The SELARRAY property

Both of these return data in the familiar LIST and ARRAY formats, but they only return data from the selected rows, thereby saving you the step of accessing SELPOS and iterating over the data yourself. So, to rewrite the example above we can now do this:

   SelList = Get_Property( CtrlEntID, "SELLIST" )

Likewise, to return the data in ARRAY format we would use the SELARRAY property like so:

   SelArray = Get_Property( CtrlEntID, "SELARRAY" )

Ergo, when asked the other day “What’s the fastest way of getting data from a specific column from the selected rows”, the answer was:

   SelData = Get_Property( CtrlEntID, "SELARRAY" )<colNum>

(And this question is also what led me to write this post…)

Bonus Trivia

The LISTBOX control also supports the SELLIST property.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s