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In this case, T must be replaced by a type argument that inherits MyClass, implements IMyInterface, and has a parameterless constructor When using two or more type parameters, you can specify a constraint for each parameter by using a separate where clause Here is an example:

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// Use multiple where clauses using System; // Gen has two type arguments and both have a where clause class Gen<T, V> where T : class where V : struct { T ob1; V ob2; public Gen(T t, V v) { ob1 = t; ob2 = v; } } class MultipleConstraintDemo { static void Main() { // This is OK because string is a class and // int is a value type Gen<string, int> obj = new Gen<string, int>("test", 11); // The next line is wrong because bool is not // a reference type Gen<bool, int> obj = new Gen<bool, int>(true, 11); } }

In this example, Gen takes two type arguments and both have a where clause Pay special attention to its declaration:

21:

class Gen<T, V> where T : class where V : struct {

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Notice the only thing that separates the first where clause from the second is whitespace No other punctuation is required or valid

Interactive Viewer Unfortunately, the Page Layout options you set here are not transferred to Adobe Reader when you convert your report to PDF for printing from the Java Report panel You must explicitly choose the paper size and orientation for PDF However, they are used when you print from within the HTML viewer The default paper size and orientation are set for all users on the Web Intelligence Server via an XML file

Part I:

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When writing generic code, there will be times when the difference between value types and reference types is an issue One such situation occurs when you want to give a variable of a type parameter a default value For reference types, the default value is null For nonstruct value types, the default value is 0, or false for bool The default value for a struct is an object of that struct with all fields set to their defaults Thus, trouble occurs if you want to give a variable of a type parameter a default value What value would you use: null, 0, false, or something else For example, given a generic class called Test declared like this:

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class Test<T> { T obj; //

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works in all classes The solution to this problem is to use another form of default, shown here: default(type) This is the operator form of default, and it produces a default value of the specified type, no matter what type is used Thus, continuing with the example, to assign obj a default value of type T, you would use this statement:

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obj = default(T);

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This will work for all type arguments, whether they are value or reference types Here is a short program that demonstrates default:

Web Intelligence allows you to insert special fields for commonly used document information such as document name, last refresh date, and page numbers You can access additional document information through report formulas With report formulas, for example, you can create a formula to display either the original document author (DocumentAuthor) or the user logged in to BusinessObjects Enterprise (CurrentUser) Refer to 22 for additional instructions on report formulas In the following example, you will add two cells to display a last refresh date and a page number: 1 From the Report toolbar, select View Page Layout 2 Scroll to the Footer area

// Demonstrate the default operator using System; class MyClass { // } // Construct a default value of T class Test<T> { public T obj; public Test() { // The following statement would work only for reference types // obj = null; // can t use // The following statement will work only for numeric value types obj = 0; // can t use

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Part III: