Expression Examples (Report Builder and SSRS)Expressions are used frequently in Reporting Services paginated reports to control content and report appearance. Expressions are written in Microsoft Visual Basic, and can use built- in functions, custom code, report and group variables, and user- defined variables. Expressions begin with an equal sign (=). For more information about the expression editor and the types of references that you can include, see Expression Uses in Reports (Report Builder and SSRS), and Add an Expression (Report Builder and SSRS). Important When RDL Sandboxing is enabled, only certain types and members can be used in expression text at report publish time. For more information, see Enable and Disable RDL Sandboxing. This topic provides examples of expressions that can be used for common tasks in a report. For expression examples for specific uses, see the following topics: For more information about simple and complex expressions, where you can use expressions, and the types of references that you can include in an expression, see topics under Expressions (Report Builder and SSRS). For more information about the context in which expressions are evaluated for calculating aggregates, see Expression Scope for Totals, Aggregates, and Built- in Collections (Report Builder and SSRS). To learn how to write expressions that use many of the functions and operators also used by expression examples in this topic, but in the context of writing a report, see Tutorial: Introducing Expressions. Functions Many expressions in a report contain functions. You can format data, apply logic, and access report metadata using these functions. You can write expressions that use functions from the Microsoft Visual Basic run- time library, and from the Convert and Math namespaces. You can add references to functions from other assemblies or custom code. You can also use classes from the Microsoft . NET Framework, including System. Text. Regular. Expressions. Visual Basic Functions You can use Visual Basic functions to manipulate the data that is displayed in text boxes or that is used for parameters, properties, or other areas of the report. This section provides examples demonstrating some of these functions. For more information, see Visual Basic Runtime Library Members on MSDN.
The . NET Framework provides many custom format options, for example, for specific date formats. For more information, see Formatting Types on MSDN. Math Functions. The Round function is useful to round numbers to the nearest integer. The following expression rounds a 1. Round(1. 3). You can also write an expression to round a value to a multiple that you specify, similar to the MRound function in Excel. Multiply the value by a factor that creates an integer, round the number, and then divide by the same factor. For example, to round 1. Round(1. 3*5)/5. Date Functions. The Today function provides the current date. This expression can be used in a text box to display the date on the report, or in a parameter to filter data based on the current date. Today(). Use the Date. MS Access provides a number of ways to create tables and queries. Using simple SQL commands, you can create tables, queries, forms, and reports. SQL stands. Interval function to pull out a specific part of a date. Here are some valid Date. Interval parameters: Date. Interval. Second. Date. Interval. Minute. Date. Interval. Hour. Date. Interval. Weekday. Date. Interval. Day. Date. Interval. Day. Of. Year. Date. Interval. Week. Of. Year. Date. Interval. Month. Date. Interval. Quarter. Date. Interval. Year. For example, this expression will show the number of the week in the current year for today's date: =Date. Part(Date. Interval. Week. Of. Year, today()). The Date. Add function is useful for supplying a range of dates based on a single parameter. The following expression provides a date that is six months after the date from a parameter named Start. Date. =Date. Add(Date. Interval. Month, 6, Parameters! Start. Date. Value). The Year function displays the year for a particular date. You can use this to group dates together or to display the year as a label for a set of dates. This expression provides the year for a given group of sales order dates. The Month function and other functions can also be used to manipulate dates. For more information, see the Visual Basic documentation. Year(Fields! Order. Date. Value). You can combine functions in an expression to customize the format. The following expression changes the format of a date in the form month- day- year to month- week- week number. For example, 1. 2/2. December Week 3: =Format(Fields! My. Date. Value, "MMMM") & " Week " &. Int(Date. Diff("d", Date. Serial(Year(Fields! My. Date. Value). Month(Fields! My. Date. Value),1), Fields! Full. Date. Alternate. Key. Value)/7)+1). To. String. When used as a calculated field in a dataset, you can use this expression on a chart to aggregate values by week within each month. The following expression formats the Sell. Start. Date value as MMM- YY. Sell. Start. Date field is a datetime data type. FORMAT(Fields! Sell. Start. Date. Value, "MMM- yy"). The following expression formats the Sell. Start. Date value as dd/MM/yyyy. The Sell. Start. Date field is a datetime data type. FORMAT(Fields! Sell. Start. Date. Value, "dd/MM/yyyy"). The CDate function converts the value to a date. The Now function returns a date value containing the current date and time according to your system. Date. Diff returns a Long value specifying the number of time intervals between two Date values. The following example displays the start date of the current year =Date. Add(Date. Interval. Year,Date. Diff(Date. Interval. Year,CDate("0. Now()),CDate("0. 1/0. The following example displays the start date for the previous month based on the current month. Date. Add(Date. Interval. Month,Date. Diff(Date. Interval. Month,CDate("0. Now())- 1,CDate("0. The following expression generates the interval years between Sell. Start. Date and Last. Receipt. Date. These fields are in two different datasets, Data. Set. 1 and Data. Set. The First Function (Report Builder and SSRS), which is an aggregate function, returns the first value of Sell. Start. Date in Data. Set. 1 and the first value of Last. Receipt. Date in Data. Set. 2. =DATEDIFF(“yyyy”, First(Fields! Sell. Start. Date. Value, "Data. Set. First(Fields! Last. Receipt. Date. Value, "Data. Set. 2")). The Date. Part function returns an Integer value containing the specified component of a given Date value. The following expression returns the year for the first value of the Sell. Start. Date in Data. Set. 1. The dataset scope is specified because there are multiple datasets in the report. Datepart("yyyy", First(Fields! Sell. Start. Date. Value, "Data. Set. The Date. Serial function returns a Date value representing a specified year, month, and day, with the time information set to midnight. The following example displays the ending date for the prior month, based on the current month. Date. Serial(Year(Now()), Month(Now()), "1"). Add. Days(- 1). The following expressions display various dates based on a date parameter value selected by the user. Example Description. Example. Yesterday=Date. Serial(Year(Parameters! Todays. Date. Value),Month(Parameters! Todays. Date. Value),Day(Parameters! Todays. Date. Value)- 1)Two Days Ago=Date. Serial(Year(Parameters! Todays. Date. Value),Month(Parameters! Todays. Date. Value),Day(Parameters! Todays. Date. Value)- 2)One Month Ago=Date. Serial(Year(Parameters! Todays. Date. Value),Month(Parameters! Todays. Date. Value)- 1,Day(Parameters! Todays. Date. Value))Two Months Ago=Date. Serial(Year(Parameters! Todays. Date. Value),Month(Parameters! Todays. Date. Value)- 2,Day(Parameters! Todays. Date. Value))One Year Ago=Date. Serial(Year(Parameters! Todays. Date. Value)- 1,Month(Parameters! Todays. Date. Value),Day(Parameters! Todays. Date. Value))Two Years Ago=Date. Serial(Year(Parameters! Todays. Date. Value)- 2,Month(Parameters! Todays. Date. Value),Day(Parameters! Todays. Date. Value)) String Functions. Combine more than one field by using concatenation operators and Visual Basic constants. The following expression returns two fields, each on a separate line in the same text box: =Fields! First. Name. Value & vb. Cr. Lf & Fields! Last. Name. Value. Format dates and numbers in a string with the Format function. The following expression displays values of the Start. Date and End. Date parameters in long date format: =Format(Parameters! Start. Date. Value, "D") & " through " & Format(Parameters! End. Date. Value, "D").
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