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# Functions in Expressions

This topic lists the functions that you can use in an expression.

## Aggregate Functions

Function Description Example
Avg(Value) Evaluates the average of the values in the collection. [Products].Avg([UnitPrice])
Count() Returns the number of objects in a collection. [Products].Count()
Exists() Determines whether the object exists in the collection. [Categories][[CategoryID] == 7].Exists()
Max(Value) Returns the maximum expression value in a collection. [Products].Max([UnitPrice])
Min(Value) Returns the minimum expression value in a collection. [Products].Min([UnitPrice])
Single() Returns an object if it is the only element in a collection. [Accounts].Single() is not null
Single(Expression) You can pass an expression as a parameter: [Collection][Condition].Single(Expression). This function returns the Expression if the Collection contains only one object that meets the specified Condition (optional). [Collection].Single([Property1]) - returns the found object’s property value.
Sum(Value) Returns the sum of all expression values in the collection. [Products].Sum([UnitsInStock])

## Date and Time Functions

Function Description Example
AddDays(DateTime, DaysCount) Returns a date-time value that is the specified number of days from the specified DateTime. AddDays([OrderDate], 30)
AddHours(DateTime, HoursCount) Returns a date-time value that is the specified number of hours from the specified DateTime. AddHours([StartTime], 2)
AddMilliSeconds(DateTime, MilliSecondsCount) Returns a date-time value that is the specified number of milliseconds from the specified DateTime. AddMilliSeconds(([StartTime], 5000))
AddMinutes(DateTime, MinutesCount) Returns a date-time value that is the specified number of minutes from the specified DateTime. AddMinutes([StartTime], 30)
AddMonths(DateTime, MonthsCount) Returns a date-time value that is the specified number of months from the specified DateTime. AddMonths([OrderDate], 1)
AddSeconds(DateTime, SecondsCount) Returns a date-time value that is the specified number of seconds from the specified DateTime. AddSeconds([StartTime], 60)
AddTicks(DateTime, TicksCount) Returns a date-time value that is the specified number of ticks from the specified DateTime. AddTicks([StartTime], 5000)
AddTimeSpan(DateTime, TimeSpan) Returns a date-time value that is from the specified DateTime for the given TimeSpan. AddTimeSpan([StartTime], [Duration])
AddYears(DateTime, YearsCount) Returns a date-time value that is the specified number of years from the specified DateTime. AddYears([EndDate], -1)
DateDiffDay(startDate, endDate) Returns the number of day boundaries between two non-nullable dates. DateDiffDay([StartTime], Now())
DateDiffHour(startDate, endDate) Returns the number of hour boundaries between two non-nullable dates. DateDiffHour([StartTime], Now())
DateDiffMilliSecond(startDate, endDate) Returns the number of millisecond boundaries between two non-nullable dates. DateDiffMilliSecond([StartTime], Now())
DateDiffMinute(startDate, endDate) Returns the number of minute boundaries between two non-nullable dates. DateDiffMinute([StartTime], Now())
DateDiffMonth(startDate, endDate) Returns the number of month boundaries between two non-nullable dates. DateDiffMonth([StartTime], Now())
DateDiffSecond(startDate, endDate) Returns the number of second boundaries between two non-nullable dates. DateDiffSecond([StartTime], Now())
DateDiffTick(startDate, endDate) Returns the number of tick boundaries between two non-nullable dates. DateDiffTick([StartTime], Now())
DateDiffYear(startDate, endDate) Returns the number of year boundaries between two non-nullable dates. DateDiffYear([StartTime], Now())
GetDate(DateTime) Extracts a date from the defined DateTime. GetDate([OrderDateTime])
GetDay(DateTime) Extracts a day from the defined DateTime. GetDay([OrderDate])
GetDayOfWeek(DateTime) Extracts a day of the week from the defined DateTime. GetDayOfWeek([OrderDate])
GetDayOfYear(DateTime) Extracts a day of the year from the defined DateTime. GetDayOfYear([OrderDate])
GetHour(DateTime) Extracts an hour from the defined DateTime. GetHour([StartTime])
GetMilliSecond(DateTime) Extracts milliseconds from the defined DateTime. GetMilliSecond([StartTime])
GetMinute(DateTime) Extracts minutes from the defined DateTime. GetMinute([StartTime])
GetMonth(DateTime) Extracts a month from the defined DateTime. GetMonth([StartTime])
GetSecond(DateTime) Extracts seconds from the defined DateTime. GetSecond([StartTime])
GetTimeOfDay(DateTime) Extracts the time of day from the defined DateTime in ticks. GetTimeOfDay([StartTime])
GetYear(DateTime) Extracts a year from the defined DateTime. GetYear([StartTime])
IsApril(DateTime) Returns True if the specified date falls within April. IsApril([OrderDate])
IsAugust(DateTime) Returns True if the specified date falls within August. IsAugust([OrderDate])
IsDecember(DateTime) Returns True if the specified date falls within December. IsDecember([OrderDate])
IsFebruary(DateTime) Returns True if the specified date falls within February. IsFebruary([OrderDate])
IsJanuary(DateTime) Returns True if the specified date falls within January. IsJanuary([OrderDate])
IsJuly(DateTime) Returns True if the specified date falls within July. IsJuly([OrderDate])
IsJune(DateTime) Returns True if the specified date falls within June. IsJune([OrderDate])
IsLastMonth(DateTime) Returns True if the specified date falls within the previous month. IsLastMonth([OrderDate])
IsLastYear(DateTime) Returns True if the specified date falls within the previous year. IsLastYear([OrderDate])
IsMarch(DateTime) Returns True if the specified date falls within March. IsMarch([OrderDate])
IsMay(DateTime) Returns True if the specified date falls within May. IsMay([OrderDate])
IsNextMonth(DateTime) Returns True if the specified date falls within the next month. IsNextMonth([OrderDate])
IsNextYear(DateTime) Returns True if the specified date falls within the next year. IsNextYear([OrderDate])
IsNovember(DateTime) Returns True if the specified date falls within November. IsNovember([OrderDate])
IsOctober(DateTime) Returns True if the specified date falls within October. IsOctober([OrderDate])
IsSameDay(DateTime) Returns True if the specified date/time values fall within the same day. IsSameDay([OrderDate])
IsSeptember(DateTime) Returns True if the specified date falls within September. IsSeptember([OrderDate])
IsThisMonth(DateTime) Returns True if the specified date falls within the current month. IsThisMonth([OrderDate])
IsThisWeek(DateTime) Returns True if the specified date falls within the current week. IsThisWeek([OrderDate])
IsYearToDate(DateTime) Returns True if the specified date falls within the year-to-date period. This period starts from the first day of the current year and continues to the current date (including the current date). IsYearToDate([OrderDate])
IsThisYear(DateTime) Returns True if the specified date falls within the current year. IsThisYear([OrderDate])
LocalDateTimeDayAfterTomorrow() Returns a date-time value corresponding to the day after Tomorrow. AddDays(LocalDateTimeDayAfterTomorrow(), 5)
LocalDateTimeLastMonth() Returns a DateTime value corresponding to the first day of the previous month. AddMonths(LocalDateTimeLastMonth(), 5)
LocalDateTimeLastWeek() Returns a date-time value corresponding to the first day of the previous week. AddDays(LocalDateTimeLastWeek(), 5)
LocalDateTimeLastYear() Returns a DateTime value corresponding to the first day of the previous year. AddYears(LocalDateTimeLastYear(), 5)
LocalDateTimeNextMonth() Returns a date-time value corresponding to the first day of the next month. AddMonths(LocalDateTimeNextMonth(), 5)
LocalDateTimeNextWeek() Returns a date-time value corresponding to the first day of the following week. AddDays(LocalDateTimeNextWeek(), 5)
LocalDateTimeNextYear() Returns a date-time value corresponding to the first day of the following year. AddYears(LocalDateTimeNextYear(), 5)
LocalDateTimeNow() Returns a date-time value corresponding to the current moment in time. AddDays(LocalDateTimeNow(), 5)
LocalDateTimeThisMonth() Returns a date-time value corresponding to the first day of the current month. AddMonths(LocalDateTimeThisMonth(), 5)
LocalDateTimeThisWeek() Returns a date-time value corresponding to the first day of the current week. AddDays(LocalDateTimeThisWeek(), 5)
LocalDateTimeThisYear() Returns a date-time value corresponding to the first day of the current year. AddYears(LocalDateTimeThisYear(), 5)
LocalDateTimeToday() Returns a date-time value corresponding to Today. AddDays(LocalDateTimeToday(), 5)
LocalDateTimeTomorrow() Returns a date-time value corresponding to Tomorrow. AddDays(LocalDateTimeTomorrow(), 5)
LocalDateTimeTwoMonthsAway() Returns a DateTime value corresponding to the first day of the following month. AddMonths(LocalDateTimeTwoMonthAway(), 5)
LocalDateTimeTwoWeeksAway() Returns a DateTime value corresponding to the first day of the following week. AddDays(LocalDateTimeTwoWeeksAway(), 5)
LocalDateTimeTwoYearsAway() Returns a DateTime value corresponding to the first day of the following year. AddYears(LocalDateTimeTwoYearsAway(), 5)
LocalDateTimeYearBeforeToday() Returns a DateTime value corresponding to the same date one year ago. AddYears(LocalDateTimeYearBeforeToday(), 5)
LocalDateTimeYesterday() Returns a date-time value corresponding to Yesterday. AddDays(LocalDateTimeYesterday(), 5)
Now() Returns the current system date and time. AddDays(Now(), 5)
Today() Returns the current date. Regardless of the actual time, this function returns midnight of the current date. AddMonths(Today(), 1)
UtcNow() Returns the current system date and time, expressed as Coordinated Universal Time (UTC). AddDays(UtcNow(), 7)

## Logical Functions

Function

Description

Example

Iif(Expression1, True_Value1, …, ExpressionN, True_ValueN, False_Value)

Returns one of several specified values depending upon the values of logical expressions.

The function can take 2N+1 arguments (N - the number of specified logical expressions):

• Each odd argument specifies a logical expression.

• Each even argument specifies the value that is returned if the previous expression evaluates to True.

• The last argument specifies the value that is returned if the previously evaluated logical expressions yielded False.

Iif(Name = ‘Bob’, 1, Name = ‘Dan’, 2, Name = ‘Sam’, 3, 4)”)

IsNull(Value)

Returns True if the specified Value is NULL.

IsNull([OrderDate])

IsNull(Value1, Value2)

Returns Value1 if it is not set to NULL; otherwise, Value2 is returned.

IsNull([ShipDate], [RequiredDate])

IsNullOrEmpty(String)

Returns True if the specified String object is NULL or an empty string; otherwise, False is returned.

IsNullOrEmpty([ProductName])

## Math Functions

Function Description Example
Abs(Value) Returns the given numeric expression’s absolute, positive value. Abs(1 - [Discount])
Acos(Value) Returns a number’s arccosine (the angle in radians, whose cosine is the given float expression). Acos([Value])
Asin(Value) Returns a number’s arcsine (the angle in radians, whose sine is the given float expression). Asin([Value])
Atn(Value) Returns a number’s arctangent (the angle in radians, whose tangent is the given float expression). Atn([Value])
Atn2(Value1, Value2) Returns the angle whose tangent is the quotient of two specified numbers in radians. Atn2([Value1], [Value2])
BigMul(Value1, Value2) Returns an Int64 containing the full product of two specified 32-bit numbers. BigMul([Amount], [Quantity])
Ceiling(Value) Returns the smallest integer that is greater than or equal to the numeric expression. Ceiling([Value])
Cos(Value) Returns the angle’s cosine, in radians. Cos([Value])
Cosh(Value) Returns the angle’s hyperbolic cosine, in radians. Cosh([Value])
Exp(Value) Returns the float expression’s exponential value. Exp([Value])
Floor(Value) Returns the largest integer less than or equal to the numeric expression. Floor([Value])
Log(Value) Returns a specified number’s natural logarithm. Log([Value])
Log(Value, Base) Returns the logarithm of a specified number in a specified Base. Log([Value], 2)
Log10(Value) Returns a specified number’s base 10 logarithm. Log10([Value])
Max(Value1, Value2) Returns the maximum value from the specified values. Max([Value1], [Value2])
Min(Value1, Value2) Returns the minimum value from the specified values. Min([Value1], [Value2])
Power(Value, Power) Returns a specified number raised to a specified power. Power([Value], 3)
Rnd() Returns a random number that is less than 1, but greater than or equal to zero. Rnd()*100
Round(Value) Rounds the given value to the nearest integer. Round([Value])
Round(Value, Precision) Rounds the given value to the nearest integer, or to a specified number of decimal places. Round([Value], 2)
Sign(Value) Returns the positive (+1), zero (0), or negative (-1) sign of the given expression. Sign([Value])
Sin(Value) Returns the sine of the angle defined in radians. Sin([Value])
Sinh(Value) Returns the hyperbolic sine of the angle defined in radians. Sinh([Value])
Sqr(Value) Returns the square root of a given number. Sqr([Value])
Tan(Value) Returns the tangent of the angle defined in radians. Tan([Value])
Tanh(Value) Returns the hyperbolic tangent of the angle defined in radians. Tanh([Value])
ToDecimal(Value) Converts Value to an equivalent decimal number. ToDecimal([Value])
ToDouble(Value) Converts Value to an equivalent 64-bit double-precision floating-point number. ToDouble([Value])
ToFloat(Value) Converts Value to an equivalent 32-bit single-precision floating-point number. ToFloat([Value])
ToInt(Value) Converts Value to an equivalent 32-bit signed integer. ToInt([Value])
ToLong(Value) Converts Value to an equivalent 64-bit signed integer. ToLong([Value])

## Reporting Functions

Function

Description

Example

Argb(Alpha, Red, Green, Blue)

Returns a string defining a color using the Alpha, Red, Green, and Blue color channel values.

Argb(1,200, 30, 200)
Result: ‘1,200,30,200’

GetDisplayText(?parameterName)

Returns a Display Text for a parameter’s lookup value.

/* ?employeeParameter stores static or dynamic predefined values
where EmployeeID is a parameter value
and EmployeeName is a display text. */
GetDisplayText(?employeeParameter)

Rgb(Red, Green, Blue)

Returns a string defining a color using the Red, Green, and Blue color channel values.

Rgb(30,200,150)
Result: ‘30,200,150’

## String Functions

Function Description Example
Ascii(String) Returns the ASCII code value of the leftmost character in a character expression. Ascii(‘a’)
Char(Number) Converts an integerASCIICode to a character. Char(65) + Char(51)
CharIndex(String1, String2) Returns the starting position of String1 within String2, beginning from the zero character position to the end of a string. CharIndex(‘e’, ‘devexpress’)
CharIndex(String1, String2, StartLocation) Returns the starting position of String1 within String2, beginning from the StartLocation character position to the end of a string. CharIndex(‘e’, ‘devexpress’, 2)
Concat(String1, … , StringN) Returns a string value containing the concatenation of the current string with any additional strings. Concat(‘A’, ‘)’, [ProductName])
Contains(String1, SubString1) Returns True if SubString1 occurs within String1; otherwise, False is returned. Contains([ProductName], ‘dairy’)
EndsWith(String1, SubString1) Returns True if the end of String1 matches SubString1; otherwise, False is returned. EndsWith([Description], ‘The end.’)
Insert(String1, StartPosition, String2) Inserts String2 into String1 at the position specified by StartPositon Insert([Name], 0, ‘ABC-‘)
Len(Value) Returns an integer containing either the number of characters in a string or the nominal number of bytes required to store a variable. Len([Description])
Lower(String) Returns String in lowercase. Lower([ProductName])
PadLeft(String, Length) Left-aligns the defined string’s characters, padding its left side with white space characters up to a specified total length. PadLeft([Name], 30)
PadLeft(String, Length, Char) Left-aligns the defined string’s characters, padding its left side with the specified Char up to a specified total length. PadLeft([Name], 30, ‘<’)
PadRight(String, Length) Right-aligns the defined string’s characters, padding its left side with empty space characters up to a specified total length. PadRight([Name], 30)
PadRight(String, Length, Char) Right-aligns the defined string’s characters, padding its left side with the specified Char up to a specified total length. PadRight([Name], 30, ‘>’)
Remove(String, StartPosition) Deletes all the characters from this instance, beginning at a specified position. Remove([Name], 3)
Remove(String, StartPosition, Length) Deletes a specified number of characters from this instance, beginning at a specified position. Remove([Name], 0, 3)
Replace(String1, SubString2, String3) Returns a copy of String1, in which SubString2 has been replaced with String3. Replace([Name], ‘The ‘, ‘’)
Reverse(String) Reverses the order of elements within String. Reverse([Name])
StartsWith(String1, SubString1) Returns True if the beginning of String1 matches SubString1; otherwise, False. StartsWith([Title], ‘The best’)
Substring(String, StartPosition, Length) Retrieves a substring from String. The substring starts at StartPosition and has a specified Length. Substring([Description], 2, 3)
Substring(String, StartPosition) Retrieves a substring from String. The substring starts at StartPosition. Substring([Description], 2)
ToStr(Value) Returns a string representation of an object. ToStr([ID])
Trim(String) Removes all leading and trailing SPACE characters from String. Trim([ProductName])
Upper(String) Returns String in uppercase. Upper([ProductName])

## Functions for Expression Bindings and Calculated Fields

Below is a list of functions that are used to construct expression bindings and calculated fields:

Function

Description

Example

NewLine()

Returns the newline string defined for the current environment.

[CategoryName]+NewLine()+[Description]

Result:

Beverages

Soft drinks, coffees, teas, beers and ales.

FormatString(Format, Value1, … , ValueN)

Returns the specified string with formatted field values. See the following topic for details: Format Data.

FormatString(‘{0:\$0.00}’, [UnitPrice])

Result: \$45.60

Rgb(Red, Green, Blue)

Returns a string defining a color using the Red, Green, and Blue color channel values.

Rgb(30,200,150)

Result: ‘30,200,150’

Join()

Concatenates the multi-value report parameter‘s values into a string. This function is useful when you bind a multi-value parameter to a label to display the parameter’s values in a report.

• Join(parameter) - concatenates the specified parameter’s values using a comma as a separator.
• Join(parameter, separator) - concatenates the specified parameter’s values using the specified separator.

Join(?CategoriesParameter)

Result: Beverages, Condiments

Join(?CategoriesParameter, newline())

Result:

Beverages

Condiments

Note

You can call the CustomFunctions.Unregister method to unregister functions listed in this section.

## Functions for Stored Procedures

The following functions are used to bind a report to a stored procedure:

Function

Description

Example

Join()

Concatenates the multi-value report parameter‘s values into a string. This function can be used when mapping multi-value report parameters to query parameters generated from a stored procedure’s parameters. Refer to the following topic for more information: Query Parameters.

• Join(parameter) - concatenates the specified parameter’s values using a comma as a separator.
• Join(parameter, separator) - concatenates the specified parameter’s values using the specified separator.

Join(?Parameter1)

CreateTable(Column1, …, ColumnN)

Creates a table from several multi-value parameters’ values. This function can be used when mapping multi-value report parameters to the query parameter that is generated from a stored procedure’s User Defined Table Type parameter. Refer to the following topic for more information: Query Parameters.

CreateTable(?Parameter1, …, ?ParameterN)

## Functions for Summary Expression Editor

Use the following functions when you calculate a summary across a report and its groups:

Function

Description

Example

sumAvg(Expression)

Calculates the average of all values within the specified summary region (group, page, or report).

sumAvg([UnitPrice])

sumCount(Expression)

Counts the number of values within the specified summary region (group, page, or report). In a simple scenario, you may not pass a parameter.

When using this function in a master-detail report‘s master band and passing a detail field as a parameter, the function counts the number of records within the detail band.

sumCount([UnitPrice])

sumDAvg(Expression)

Calculates the average of all distinct values within the specified summary region (group, page, or report).

sumDAvg([UnitPrice])

sumDCount(Expression)

Counts the number of distinct values within the specified summary region (group, page, or report). In a simple scenario, you may not pass a parameter.

sumDCount([UnitPrice])

sumDStdDev(Expression)

Calculates the standard deviation of all distinct values within the specified summary region (group, page, or report).

sumDStdDev([UnitPrice])

sumDStdDevP(Expression)

Calculates the standard population deviation of all distinct values within the specified summary region (group, page, or report).

sumDStdDevP([UnitPrice])

sumDSum(Expression)

Calculates the total of all distinct values within the specified summary region (group, page, or report).

sumDSum([UnitPrice])

sumDVar(Expression)

Calculates the amount of variance for all distinct values within the specified summary region (group, page, or report).

sumDVar([UnitPrice])

sumDVarP(Expression)

Calculates the population variance of all distinct values within the specified summary region (group, page, or report).

sumDVarP([UnitPrice])

sumMax(Expression)

Calculates the maximum of all values within the specified summary region (group, page, or report).

sumMax([UnitPrice])

sumMedian(Expression)

Finds the middle number within a sequence.

Note that if the total number of elements is odd, this function returns the value of the middle number in a sequence. If the total number of elements is even, this function returns the arithmetical mean of the two middle numbers.

sumMedian([UnitPrice])

sumMin(Expression)

Calculates the minimum of all values within the specified summary region (group, page, or report).

sumMin([UnitPrice])

sumPercentage(Expression)

Calculates the percent ratio of the current data row’s value to the total of all the values within the specified summary region (group, page, or report).

sumPercentage([UnitPrice])

sumRecordNumber(Expression)

Returns the current record number in the specified summary region (group, page, or report). This means, for instance, if the summary is calculated for a group, then the record number is calculated only within that group, and is reset every time a new group is started.

In a simple scenario, you may not pass a parameter.

sumRecordNumber()

sumRunningSum(Expression)

Calculates the sum of all previous values displayed before the current data row with the current data row value.

sumRunningSum([UnitPrice])

sumStdDev(Expression)

Calculates the standard deviation of all values within the specified summary region (group, page, or report).

sumStdDev([UnitPrice])

sumStdDevP(Expression)

Calculates the standard population deviation of all values within the specified summary region (group, page, or report).

sumStdDevP([UnitPrice])

sumSum(Expression)

Calculates the total of all values within the specified summary region (group, page, or report).

sumSum([UnitsInStock])

sumVar(Expression)

Calculates the amount of variance for all values within the specified summary region (group, page, or report).

sumVar([UnitPrice])

sumVarP(Expression)

Calculates the population variance of all values within the specified summary region (group, page, or report).

sumVarP([UnitPrice])

sumWAvg(Expression, Expression)

Calculates the weighted average of all values within the specified summary region (group, page, or report). This summary type returns the result of the following operation: Sum(Expression1 * Expression2) / Sum(Expression2).

sumWAvg([UnitPrice])

## Custom Functions

You can implement and register custom functions in your Reporting application. The registered custom functions become available in the Expression Editor. You can use these functions in expressions.

To add a custom function, create an ReportCustomFunctionOperatorBase class descendant and call the CustomFunctions.Register static method at application startup. Call the CustomFunctions.Unregister static method to unregister a previously registered function.

If you develop a web application, review the following help topics for more information:

Footnotes
1. Unregistered functions are not available in the Expression Editor. An expression that has unregistered functions is evaluated as an empty value.