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// This statement works for both reference and value types obj = default(T); // Works! }

// } class DefaultDemo { static void Main() { // Construct Test using a reference type Test<MyClass> x = new Test<MyClass>(); if(xobj == null) ConsoleWriteLine("xobj is null"); // Construct Test using a value type Test<int> y = new Test<int>(); if(yobj == 0) ConsoleWriteLine("yobj is 0"); } }

55984 57400 58659 59757 60691

4 Drag the Template cell Last Refresh Date to the bottom-left corner of the footer Notice that the formula for this cell is

The output is shown here:

C# allows you to create generic structures The syntax is the same as for generic classes For example, in the following program, the XY structure, which stores X, Y coordinates, is generic:

=LastExecutionDate()

51 52 53 54 55

// Demonstrate a generic struct using System; // This structure is generic struct XY<T> { T x; T y; public XY(T a, T b) { x = a; y = b; } public T X { get { return x; } set { x = value; } } public T Y { get { return y; }

Part I:

5 Select the Template cell Page Number / Total Pages and drag it to the bottomright corner of the footer Notice the formula for this cell is as follows:

26 27 28 29 30

set { y = value; } } } class StructTest { static void Main() { XY<int> xy = new XY<int>(10, 20); XY<double> xy2 = new XY<double>(880, 990); ConsoleWriteLine(xyX + ", " + xyY); ConsoleWriteLine(xy2X + ", " + xy2Y); } }

The output is shown here:

Page()+"/"+NumberOfPages()

006100 006781 007505 008274 009085

10, 20 88, 99

Like generic classes, generic structures can have constraints For example, this version of XY restricts type arguments to value types:

6 By default, Web Intelligence uses a thin line on the bottom border of any free-standing cells You can remove the cell borders by selecting both cells in the Report window (use CTRL-click to select both footer cells), going to the Properties tab, selecting Appearance > Text Format > Borders, and removing the bottom border Figure 21-14 shows a formatted report with the default footer cells modified to include some additional text such as Last Refresh Date and Page N of N You can modify these cells as you would modify any formula Ensure the Formula toolbar is displayed Then select the footer cell and modify the formula

struct XY<T> where T : struct { //

07921 08436 08955 09477 10000

As the preceding examples have shown, methods inside a generic class can make use of a class type parameter and are, therefore, automatically generic relative to the type parameter However, it is possible to declare a generic method that uses one or more type parameters of its own Furthermore, it is possible to create a generic method that is enclosed within a non-generic class Let s begin with an example The following program declares a non-generic class called ArrayUtils and a static generic method within that class called CopyInsert( ) The CopyInsert( ) method copies the contents of one array to another, inserting a new element at a specified location in the process It can be used with any type of array

= Refresh Date +LastExecutionDate() = Page +Page()+ of +NumberOfPages()

// Demonstrate a generic method using System; // A class of array utilities Notice that this is not // a generic class class ArrayUtils { // Copy an array, inserting a new element // in the process This is a generic method public static bool CopyInsert<T>(T e, uint idx, T[] src, T[] target) { // See if target array is big enough if(targetLength < srcLength+1) return false;

61459 62059 62488 62746 62832

18:

You may want to add your corporate logo within the report header To do so, you insert a blank cell that then points to an image file Within the Web Intelligence document, the cell format must be set to be read as an image file The image file must be copied to the Enterprise Server in the following path: