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Microsoft Dynamics AX (Archived)

X++ Computed View AX 2012

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Posted on by Microsoft Employee

This is my very first computed View Method, and was wondering if someone would tell me if I am going in the correct direction.  

The View name is ccv_HierarchyTreeTable (which uses the table - HierarchyTreeTable.).  I am using the two fields [Path] and [Element Number].  I am using the computed field as a sort field, so I can get the data in the correct order for a grid view in a form.

It returns two different strings depending on if Path is blank or not (am I using the correct/best way of checking for a blank string?)

If I followed the example I took this from, I should have:  public static server str cc_SortNode() -- why would it have server in that line?  

Anyway - following is my code.  Does it look correct?  Anything else I need to know?

_________________

public static str cc_SortNode()

{

 #define.ViewName(ccv_HierarchyTreeTable)

 #define.DataSourceName("HierarchyTreeTable_1")

 #define.FieldPath("Path")

 #define.FieldElement("ElementNumber")

 str sReturn,

     sPath,

     sElementNumber;

 DictView dictView2;

 dictView2 = new DictView(tableNum(#ViewName));

 sPath = dictView2.computedColumnString

     (#DataSourceName,

      #FieldPath,

      FieldNameGenerationMode::FieldList,

      true);

 sElementNumber = dictView2.computedColumnString

     (#DataSourceName,

      #FieldElementNumber,

      FieldNameGenerationMode::FieldList,

      true);

  if (spath == "")

  {

    sReturn = sElementNumber + "!" + sElementNumber;

  }

  else

  {

    sReturn = sPath + sElementNumber;

  {

  return sReturn;

}

*This post is locked for comments

  • dolee Profile Picture
    dolee 11,279 on at
    RE: X++ Computed View AX 2012

    Forgot to mention, so you just need to lookup TSQL CASE statement for more information.

    msdn.microsoft.com/.../ms181765.aspx

  • Verified answer
    dolee Profile Picture
    dolee 11,279 on at
    RE: X++ Computed View AX 2012

    Yes, it is a TSQL statement syntax.

    What happen is the view in AOT is translated into SQL statements when synchronizing with database.

    When you have a computed column, the string returned by the view method is injected into the TSQL statement directly as a column definition.

    E.g.

    CREATE VIEW [dbo].[YourView] AS

    SELECT col1, col2, col3, <view method return value>

    FROM yourTable

    WHERE ....

    GO

  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: X++ Computed View AX 2012

    sReturn = strFmt("CASE " + "WHEN %1 = '' THEN %2 + '!' + %2 ELSE %1 + %2 END", sPath, sElementNumber);

    So - that was helpful.  I changed my if statement to this, and now it compiles and works.

    BUT!!! - I don't understand this CASE statement.  This isn't standard X++ case statement is it?  Is this more of an SQL case statement?  Where would I go look this up so I can better understand what I am doing!  Thanks

  • Suggested answer
    dolee Profile Picture
    dolee 11,279 on at
    RE: X++ Computed View AX 2012

    Hi,

    What you are returning in this method should be a partial TSQL statement . The condition logic is to be included in it.

    In your case, that would mean you should look to return something like:

    CASE

     WHEN yourTable.[Path] = '' THEN yourTable.[Element Number] + '!' + yourTable.[Element Number]

     ELSE yourTable.[Path] + yourTable.[Element Number]

    END AS [My Field Name]

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