print barcode in vb.net With aggregate functions, you can set the aggregate scope explicitly. in C#.NET

Encode PDF 417 in C#.NET With aggregate functions, you can set the aggregate scope explicitly.

With aggregate functions, you can set the aggregate scope explicitly.
PDF 417 Printer In Visual C#
Using Barcode creation for .NET framework Control to generate, create PDF-417 2d barcode image in VS .NET applications.
www.OnBarcode.com
Read PDF 417 In C#.NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
USING EXPRESSIONS AND FUNCTIONS
Painting Barcode In C#.NET
Using Barcode creator for VS .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Make ECC200 In C#.NET
Using Barcode generator for .NET Control to generate, create DataMatrix image in .NET applications.
www.OnBarcode.com
However, when you run the report, you will get the wrong scope exception that we just discussed. The problem is that because there is no containing scope, the Sum() function has no idea how to calculate the expression. You may try to solve this issue by changing the expression to Sum(Fields! Sales.Value, "lstTerritory") so you tell the function to use the lstTerritory list region. This won t work either, because you can request only a containing scope. In our case, because the textbox is outside any region, there is no containing scope. The right expression in this scenario is Sum(Fields!Sales.Value, "dsEmployeeSales"), so the Sum() function calculates the total for the whole dataset, as shown in figure 5.12. Please note that if the report uses only one dataset, you don t have to explicitly specify the dataset name, because the aggregate will default to it if it has no containing scope. The Report Designer helps you somewhat to adopt the scope mentality. When you drag and drop a dataset field from another dataset to a region, it automatically generates an aggregate expression for the textbox value. If the field is numeric, the following expression is generated:
1D Barcode Maker In Visual C#.NET
Using Barcode encoder for .NET framework Control to generate, create Linear image in VS .NET applications.
www.OnBarcode.com
Code39 Generator In C#.NET
Using Barcode maker for Visual Studio .NET Control to generate, create Code 39 image in VS .NET applications.
www.OnBarcode.com
=Sum("<field name>", "<dataset name>")
Paint PDF-417 2d Barcode In Visual C#.NET
Using Barcode generation for .NET Control to generate, create PDF 417 image in .NET framework applications.
www.OnBarcode.com
Painting Uniform Symbology Specification ITF In C#
Using Barcode drawer for .NET framework Control to generate, create 2/5 Interleaved image in .NET applications.
www.OnBarcode.com
As you can see, the Report Designer explicitly sets the scope to the dataset name that the field belongs to. If the field is the numeric Sum(), the Report Designer defaults to Sum(); otherwise it uses the First() aggregate function to retrieve the field value from the first data row. Implementing running totals There are a few other aggregate functions available with RS that allow you to perform various aggregate calculations, such as counting (Count(), CountDistinct(), CountRows()) and getting the minimum, average, and maximum values, as well as
Generating PDF 417 In Java
Using Barcode generation for Eclipse BIRT Control to generate, create PDF-417 2d barcode image in BIRT reports applications.
www.OnBarcode.com
PDF417 Drawer In .NET
Using Barcode creator for Reporting Service Control to generate, create PDF-417 2d barcode image in Reporting Service applications.
www.OnBarcode.com
Creating a grand total by using aggregate functions
Generating PDF417 In Java
Using Barcode drawer for Java Control to generate, create PDF417 image in Java applications.
www.OnBarcode.com
Paint QR Code In Visual Studio .NET
Using Barcode drawer for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
www.OnBarcode.com
WORKING WITH FUNCTIONS
Read Code 39 Full ASCII In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Creating QR Code 2d Barcode In Visual Studio .NET
Using Barcode generator for Reporting Service Control to generate, create QR Code ISO/IEC18004 image in Reporting Service applications.
www.OnBarcode.com
variance and deviation values. Please consult the documentation for a full list of all aggregate functions supported by RS. Those of you familiar with SQL will find the RS aggregate functions similar to the ones supported by most databases. The SQL specification defines five aggregate functions that databases must support (MAX, MIN, AVG, SUM, and COUNT). An interesting function that we would like to mention is RunningValue(). This function allows you to implement running total aggregate calculations, as the Monthly Sales by Product Category report shown in figure 5.13 demonstrates. The Running Totals column carries over the total from the previous months so the user can see the accumulated-by-month amount. Running totals reports are not easily done using straight SQL. With the helpful RunningValue() function, though, authoring this report with RS is a matter of minutes. The only thing that we have to do is set the Running Total column expression to
Encode Code-128 In None
Using Barcode printer for Microsoft Excel Control to generate, create Code128 image in Microsoft Excel applications.
www.OnBarcode.com
Drawing UPCA In VS .NET
Using Barcode generator for Reporting Service Control to generate, create UPC A image in Reporting Service applications.
www.OnBarcode.com
=RunningValue(Fields!Sales.Value, Sum, "dsSales")
Draw PDF-417 2d Barcode In None
Using Barcode generation for Office Word Control to generate, create PDF417 image in Word applications.
www.OnBarcode.com
PDF417 Drawer In Java
Using Barcode creator for Java Control to generate, create PDF417 image in Java applications.
www.OnBarcode.com
Of course, if you need aggregate operations other than summing, we can replace the Sum function in RunningValue with any other aggregate function with the exception of RunningValue, RowNumber, or Aggregate. The Aggregate() function returns a custom aggregate if the database provider supports user-defined aggregates. Currently, SQL Server 2000 does not support custom aggregates. However, the next release, code-named Yukon, will allow developers
Make Barcode In Java
Using Barcode encoder for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Encoding ANSI/AIM Code 39 In None
Using Barcode printer for Office Word Control to generate, create Code39 image in Word applications.
www.OnBarcode.com
Use the RunningTotal() function to implement running totals.
USING EXPRESSIONS AND FUNCTIONS
to create user-defined aggregate functions. Similar to user-defined functions (UDF), custom aggregates return a single value and they can be written in any of the supported .NET languages. 5.3.3 Using other internal functions RS provides three other helpful functions that you can use in your expressions: InScope, Level, and Previous. The InScope() function indicates whether the current report item is within the specified scope. This is especially useful with matrix regions, as we will see in section 5.4.1 when we discuss reports with navigational features. Implementing recursive hierarchies The Level() function returns the level offset as an integer value for recursive hierarchy reports. Recursive hierarchy reports are based on self-referential data, which has a parent-child relationship already defined. A typical example is an organizational hierarchy, where each employee record in the database has a ManagerID column pointing to the employee supervisor record. RS allows us to quickly generate reports that take advantage of such recursive data relationships. For example, let s create a report that displays the AWC organizational structure. Figure 5.14 shows the Corporate Hierarchy report. The report shows the employee name, his title, and the name and title of his direct supervisor. In addition, the report gives the user two options to filter the report data. First, the user can choose to see whom a given employee reports to, and second, it allows the user to see the employee s subordinates.
Copyright © OnBarcode.com . All rights reserved.