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[quote=issbg]Expressions (used in properties)   

[color=blue][u]Examples:[/u][/color] 

33 degrees in radians[code]33 * Math.PI / 180[/code]  property POS (WGS84) latitude in radians[code]POS.Latitude * Math.PI / 180[/code]  if property SPEED is over 100, return text "over 100km/h", otherwise - return SPEED value [code]SPEED>100?"over 100km/h":SPEED.ToString()[/code]  time period from last updating property SPEED[code]DateTime.UtcNow - __SPEED.LastUpdate[/code]    [u][color=blue]

[b]Operators[/b][/color][/u]  
[b]! (not)[/b] [color=darkblue]!true = not (!false)[/color]   
[b]&& (and)[/b] - logical and [color=darkblue]true && false = False[/color]  
[b]|| (or)[/b] [color=darkblue]true || false = True[/color]  
[b]=[/b] equals  [color=darkblue](12+3 = 123) = false[/color] 
[b]!=[/b] (<>) not equal  
[b]<, >, >=, <=[/b] comparisons  
[b]+,-,*,/[/b] arithmetic operations  
[b]% (mod)[/b] modulus operator  
[b][,][/b] array access    [u][color=blue]

[b]Keywords[/b][/color][/u] 
[b]not, and, or, mod[/b] - see [color=blue]

[b]Operators[/b][/color]  
[b]true[/b] - logical True value 
[b]false[/b] - logical false value  
[b]null[/b] object null/empty value  
[b]iif (?:)[/b] conditional construction [color=darkblue]iif(1=2, 123, 32)[/color] is equivalent to [b]1=2 ? 123 : 23[/b]  
[b][url=http://msdn.microsoft.com/library/system.math.aspx]Math[/url][/b] - mathematical expressions  constants [color=darkblue]Math.E, Math.PI[/color]  methods with 1 parameter: [color=darkblue]Math.[color=green][method][/color](x)[/color]  [color=green]Abs,Acos,Asin,Atan,Atan2,Ceiling,Cos,Cosh,Exp,Floor,Log,Log10,Round,Sign,Sin,Sinh,Sqrt,Tan,Tanh,Truncate[/color]  with more parameters [color=green]Log(x, base), Min(x, y), Pow(x, power), Round(x, decimalPlaces)[/color]  
[b][url=http://msdn.microsoft.com/library/system.convert.aspx]Convert[/url][/b] - conversions  methods with 1 parameter: [color=darkblue]Convert.[color=green][method][/color](obj)[/color]  [color=green]ToBoolean,ToByte,ToChar,ToDateTime,ToDecimal,ToDouble,ToInt16,ToInt32,ToInt64,ToSByte,ToSingle,ToString,ToUInt16,ToUInt32,ToUInt64[/color]    [u][color=blue]

[b]Types[/b][/color][/u]  
[b][url=http://msdn.microsoft.com/library/system.object.aspx]object[/url][/b] – general unknown type (if not defined)  
[b][url=http://msdn.microsoft.com/library/system.boolean.aspx]bool (Boolean)[/url][/b] – logical type true or false  
[b][url=http://msdn.microsoft.com/library/system.char.aspx]char (Char)[/url][/b] – character   
[b][url=http://msdn.microsoft.com/library/system.string.aspx]string (String)[/url][/b] – literal string   
[b][url=http://msdn.microsoft.com/library/system.sbyte.aspx]sbyte (SByte)[/url][/b] Signed 8-bit integer: –128 ... 127 
[b][url=http://msdn.microsoft.com/library/system.byte.aspx]byte (Byte)[/url][/b] Unsigned 8-bit integer: 0 ... 255 
[b][url=http://msdn.microsoft.com/library/system.int16.aspx]short (Int16)[/url][/b] Signed 16-bit integer: –32,768 ... 32,767 
[b][url=http://msdn.microsoft.com/library/system.uint16.aspx]ushort (UInt16)[/url][/b] Unsigned 16-bit integer: 0 ... 65,535  
[b][url=http://msdn.microsoft.com/library/system.int32.aspx]int (Int32)[/url][/b] Signed 32-bit integer: –2,147,483,648 ... 2,147,483,647  
[b][url=http://msdn.microsoft.com/library/system.uint32.aspx]uint (UInt32)[/url][/b] Unsigned 32-bit integer: 0 ... 4,294,967,295  
[b][url=http://msdn.microsoft.com/library/system.int64.aspx]long (Int64)[/url][/b] Signed 64-bit integer: -9,223,372,036,854,775,808 ... 9,223,372,036,854,775,807  
[b][url=http://msdn.microsoft.com/library/system.uint64.aspx]ulong (UInt64)[/url][/b] Unsigned 64-bit integer: 0 ... 18,446,744,073,709,551,615  
[b][url=http://msdn.microsoft.com/library/system.single.aspx]float (Single)[/url][/b] floating-point, 7 digits: ±1.5e−45 to ±3.4e38  
[b][url=http://msdn.microsoft.com/library/system.double.aspx]double (Double)[/url][/b] floating-point 15-16 digits ±5.0e−324 to ±1.7e308  
[b][url=http://msdn.microsoft.com/library/system.decimal.aspx]decimal (Decimal)[/url][/b] 28-29 significant digits, (-7.9 x 1028 to 7.9 x 1028) / (100 to 28)    
[b][url=http://msdn.microsoft.com/library/system.datetime.aspx]DateTime[/url][/b] - date time, has variables [color=darkblue]DateTime.Now, DateTime.Today, DateTime.UtcNow[/color]  [color=green]DaysInMonth(year,month), IsLeapYear(year)[/color]  
[b][url=http://msdn.microsoft.com/library/system.datetimeoffset.aspx]DateTimeOffset[/url][/b] like DateTime, with offset  
[b][url=http://msdn.microsoft.com/library/system.timespan.aspx]TimeSpan[/url][/b] - time interval    
[b][url=http://msdn.microsoft.com/library/system.guid.aspx]Guid[/url][/b] - globally unique identifier  
[b]WGS84[/b] - World Geodetic System 1984, Latitude, Longitude in degrees  [color=green]WGS84.FromLatLong(latitude, longitude)[/color]  [color=green]WGS84.WGS84_RAD(latitudeRads, longitudeRads)[/color]  [color=green]WGS84.Parse(string), WGS84.ParseIso(string)[/color]  
[b]WGS84Zone[/b] - geo zone, defined by set of WGS84 points and distantance  [color=green]WGS84Zone.Circle(center, radius)[/color]  [color=green]WGS84Zone.Line(distance, points)[/color]  [color=green]WGS84Zone.Area(points)[/color]  [color=green]WGS84Zone.Parse(string)[/color]  
[b]IconsList[/b] - encapsulates icons list data  [color=green]IconsList.Create(id, name, prefix, idList)   [i]IconsList.Create( 10, "name", "issbg\\10\\orrange-", "18,18;18.png|22,22;22.png|34,34;34.png")[/i][/color]    [u][color=blue]

[b]Object/Properties integration[/b][/color][/u]  in expression Object properties could be used  for Object [b]CAR[/b], with properties   
[b]POS[/b]: [color=darkblue]WGS84[/color]  
[b]SPEED[/b]: [color=darkblue]double[/color] 
[b]ALTITUDE[/b]: [color=darkblue]int[/color]  
[b]DRIVER[/b]: [color=darkblue]string[/color]    [color=darkblue]SPEED * ALTITUDE[/color] will return multiplication by [b]SPEED[/b] and [b]ALTITUDE[/b] properties values  [color=darkblue]POS.Latutude*Math.PI/180[/color] will return position Latitude in radians  [color=darkblue]SPEED>100 ? "over 10km/h" : "slow"[/color] - will return differrent string, by [b]SPEED[/b] value    meta property data is accessible using prefix "__"   [color=darkblue]__SPEED.LastUpdate[/color] will return [color=darkblue]DateTime[/color] value of timestamp when  [b]SPEED[/b] property value was updateed  another property meta data is   [color=green]Category,DataType,Description,LastSet,LastUpdate,Label,PermissionsHex,Unit,IsEmpty,IsQueue,IsQuery,QueueLength,Queue[/color]    [color=darkblue]__SPEED.QueueLength<2 ? 0 : (Convert.ToDouble(__SPEED.Queue[__SPEED.QueueLength-2].Value) - SPEED)[/color]  will return SPEED difference if SPEED has last value (in values queue)    [color=darkblue]__SPEED.Value[/color] is equal [color=darkblue]SPEED[/color], but [u]not equivalent!!![/u]  [color=darkblue]SPEED[/color] returns
[b]double[/b] type (type of property SPEED), so [color=darkblue]SPEED * 2[/color] is valid expression, but  [color=darkblue]__SPEED.Value[/color] returns [b]object[/b] type, so [color=red]__SPEED.Value * 2[/color] is not valid, [b]object[/b] should be casted to [b]double[/b] like [color=darkblue]Convert.ToDouble(__SPEED.Value) * 2[/color][/quote]

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