LlExprEvaluate Method

In This Topic

Evaluates an expression.

You should avoid using this function directly - the ExpressionEvaluator Class offers you a much more powerful way to work with expressions.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Function LlExprEvaluate( _
   ByVal hExpression As IntPtr _
) As String

public string LlExprEvaluate( 
   IntPtr hExpression
)

public:
String^ LlExprEvaluate( 
   IntPtr hExpression
)

Parameters

hExpression: the pointer returned by the corresponding LlExprParse()

Remarks

The buffer is always filled with a zero-terminated string. Depending on the type of result the buffer contents are to be interpreted as follows:

Type	Meaning
LL_EXPRTYPE_STRING	the buffer contents are the result string
LL_EXPRTYPE_DOUBLE	the buffer contents are the corresponding representation of the value, for pi e.g. .3.141592.. The value is always given with 6 decimal places.
LL_EXPRTYPE_DATE	the buffer contains the corresponding representation of the Julian value, for example .21548263.
LL_EXPRTYPE_BOOL	the buffer contains either the string .true. or .false..
LL_EXPRTYPE_DRAWING	the buffer contains the name of the drawing variable/drawing field (!) not the contents.
LL_EXPRTYPE_BARCODE	the buffer contains the value which would be interpreted as the barcode.

Requirements

Platforms: Windows 10 (Version 21H2 - 23H2), Windows 11 (21H2 - 22H2), Windows Server 2016 - 2022
.NET: .NET Framework 4.8, .NET 6, .NET 7, .NET 8

Reference

LlCore Class
LlCore Members

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