ComponentOne FlexReport for WinForms
Evaluate(String) Method
Example 

C1.Win.FlexReport.4 Assembly > C1.Win.FlexReport Namespace > C1FlexReport Class > Evaluate Method : Evaluate(String) Method
A string with a VBScript expression to be evaluated.
Evaluates a VBScript expression in the current report context.
Syntax
'Declaration
 
Public Overloads Function Evaluate( _
   ByVal expression As System.String _
) As System.Object
public System.object Evaluate( 
   System.string expression
)

Parameters

expression
A string with a VBScript expression to be evaluated.

Return Value

The value of the expression.
Remarks

Use this method to evaluate expressions as they would be evaluated while generating a report. This can be useful in designer-type applications, to provide an "Immediate Window" where users can test expressions.

If the expression string contains invalid syntax or causes an evaluation error, the control raises the ReportError event. In this case, the Handled parameter of the event is set to true, so the exception is ignored by default.

Example

Expressions may contain simple VBScript expressions such as:

Expressions may also contain references to the Report object and all its sub-objects. For example:

Finally, data fields, Field, and Section objects may be referenced directly by name.

Console.WriteLine(_c1r.Evaluate("2+2"));
  4
Console.WriteLine(_c1r.Evaluate(" \"A\" & \"B\" ");
  AB
Console.WriteLine(_c1r.Evaluate("Report.DataSource.RecordSource"));
  SELECT * FROM Employees
Console.WriteLine(_c1r.Evaluate("Report.DataSource.Recordset.Fields.Count"));
  7
Console.WriteLine(_c1r.Evaluate("Report.Fields(0).Name"));
  FirstNameField
Console.WriteLine(_c1r.Evaluate("FirstNameField.Value"));
  Andrew
Console.WriteLine(_c1r.Evaluate("CategoryName"));
  Beverages
See Also

Reference

C1FlexReport Class
C1FlexReport Members
Overload List