Expression Editor for WinForms | ComponentOne
In This Topic
    Create Expressions
    In This Topic

    Expression Editor enables creating and editing complex expressions at run-time. It provides Excel-like formulas, in the form of functions as well as operators and constants that help in shaping data using expressions.

    To create expressions, use any of the following ways:

    Note that variables are enclosed in square brackets [].

    Some examples of creating expressions using in-built functions and operators are as follows.

    Using Logical and Aggregate Functions Description
         Iif([Price] + [Cost]) > 500,300,400) This expression evaluates the two constants 300 and 400 based on the condition provided by the expression "([Price] + [Cost]) > 500".
         IsNull([Sales]) This expression evaluates whether Sales are null.
    Using DateTimeFunctions Description
         AddDays([OrderDate], 30) This expression adds the number of days equivalent to integer value 30 to the OrderDate value of the type DateTime.
         DateDiffDay([DateStart], [DateEnd]) This expression counts the number of days between DateStart and DateEnd.
    Using Math Functions Description
         Sign([Value]) This expression returns the integer value indicating the sign of the provided Value.
         Exp([Value]) This expression calculates and returns the base of natural logarithms raised to the power Value.
    Using String Functions Description
        Mid([Name],0,4) This expression returns a string of specified number of 4 characters from the beginning of the specified [Name] string.
         Remove([Name], 0, 3) This expression removes specified number of 3 characters from the beginning of the string specified as 0. 
    See Also