Wyn Enterprise User Guide

Wyn Enterprise: Expression Editor

You can use an expression to set the value of a control in the report, or set conditions under which certain styles apply. You can set expressions through the Expression Editor dialog while setting values in the properties window. The editor allows you to choose from a number of fields available to the report as well as to a particular property. You can access the Expression Editor by selecting nearly any property of a control and choosing <Expression...> from the drop-down list.

All expressions are enclosed within curly braces '{}'. Even the expression for a field value for a TextBox is set as follows: {LastName}

While building an expression, you can directly add the entire expression or part of it in the Expression pane of the Expression Editor. Then use the Insert or Append buttons to create a complete expression.

Expression Editor Dialog

Concatenating Fields and Strings

You can concatenate fields with strings and with other fields. For e.g., use the following expression to get a result like "Customer Name: Bossert, Lewis": Customer Name: {LastName} , {FirstName}

Conditional Formatting

You can use expressions in properties like Color, Font, Border, etc. on specific field values based on a condition, to highlight a part of data. The formula for conditional formatting is:
{IIF(<Condition>, <TruePart>, <FalsePart>)}

For e.g., if you enter the following expression in the Font > FontWeight property of a textbox that displays the names of people, you get the name "Denise" in bold.
{IIF(FirstName { "Denise", "Bold", "Normal")}

Similarly, if you enter the following expression in the Background >Color property of a textbox in a table, then you get alternating 'Transparent' and 'LightGray' colored textboxes in the rows of the table.
{IIF(RowNumber(Nothing) mod 2, "Transparent", "LightGray")}

Functions

You can use a number of aggregate and other functions in your expressions. Wyn Enterprise includes a range of functions, including running value, population standard variance, standard deviation, count, minimum and maximum. For e.g., use the following expression to get a count of employees. {Count(EmployeeID, Nothing)}

Summary and Total Value Calculations

Calculation Option Result
No Calculation Displays the value that is entered in the field.
% of Grand Total Displays values as a percentage of the grand total of all the values or data points in the report.
% of Row Group Total Displays the value in each row or category as a percentage of the total for the row or category.
% of Parent Row Group Total Calculates values as follows:
(value for the item) / (value for the parent item on rows)
% of Column Group Total Displays all the values in each column or series as a percentage of the total for the column or series.
% of Parent Column Group Total Calculates values as follows:
(value for the item) / (value for the parent item on columns)