PowerBuilder Interview Question and Answers

51. What are Extended column attributes? How can you change them dynamically?
  It’s DataWindow object property (Expressions) which we can change dynamically using Modify() function.
 
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52. What is a code table?
 
  • Specifies whether PowerBuilder uses the code table for the column to validate data.
  • Values are Boolean: True–Uses code table to validate data; False–Does not use code table to validate data.
  • The appearance of the text is specified by the edit mask.
  • Each row in the Code Table is a pair of corresponding values: a display value that user sees and data values-those that are saved in the database.
  • Code Tables are used with DropDownListBox and RadioButtons.
 
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53. How can you modify a code table during execution?
  Using GETVALUE() and SETVALUE() functions.
 
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54. How do you get the name of a DropDownDataWindow?
  GetChild()
 
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55. How do you trap errors from the DataBase in the DataWindow?
  Write some code in the DBError Event
For example:
IF SQLCA.SQLCode <> 0 THEN
MessageBox()
return 1
END IF
 
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