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However, C# de nes a modi er that you can use to declare that a variable is a nullable value type. A nullable value type behaves in a similar manner to the original value type, but you can assign the null value to it. You use the question mark ( )to indicate that a value type is nullable, like this:

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The route is nothing more than a pattern and is not associated with any logic of its own. Invoked by the routing module, the component that ultimately decides how to rewrite the matching URL is another one entirely. Precisely, it is the route handler. Technically speaking, a route handler is a class that implements the IRouteHandler interface. The interface is defined as shown here:

There are more detailed options available for most of these constraints that were not covered in this chapter. More Info Refer to SQL Server Books Online for further options that can be used with these constraints.

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Although using the New keyword is OK in most cases, it is recommended that you invoke the Create method so that your code is generic and can work with different machine-level default values. All symmetric algorithm objects require that you assign their Key and IV properties before encrypting and decrypting data. The Key property is the password that the algo rithm uses in the encryption process and must be assigned an array of bytes of a given length. Each specific symmetric algorithm supports keys of different lengths for example, 128, 192, or 256 bits in the case of Rijndael or 192 bits for TripleDES. By default, the .NET Framework uses the longest key size among those available for increased security:

VLF #2

right until the frame sits at the edge of the white area on that slide. Then click outside the chart frame. PowerPoint has rotated the labels so that the chart area can expand even more.

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Queue<int> myQueue = new Queue<int>();

str1 = str1 & StrDup(2, vbCr) _ & Click OK to close message box." MsgBox(str1, , From CustOrderHist Stored Proc ) End If Close data reader and connection object references. drd1.Close() cnn1.Close() End Sub You can r un t he sam ple defined by t he pr eceding t wo sub pr ocedur es fr om Module1 in t he My ADODOTNETSam ples solut ion. The sam ple pr ocedur e call in t he m ain procedur e for inv oking t he first pr ocedur e follows. I t passes t wo ar gum ent s t o t he RunCust OrderHist Wit hSt r ing pr ocedur e. The first argum ent is a Cust om erI D value, and t he second argum ent designat es t he m ax im um num ber of rows t o display in a m essage box. You can obt ain a r esult set t o display for any Cust om erI D in t he Cust om ers t able t hat has or ders associat ed wit h it . ( Tw o Cust om erI D values don t hav e any orders.) The solut ion aut om at ically populat es t he argum ent list for t he second sub procedure t hat print s t he rows in t he Dat aReader creat ed by t he RunCust OrderHist Wit hSt r ing pr ocedur e. RunCustOrderHistWithString( TORTU", 10)

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The values reappear along with the total for 2004. The values are stored in the writeback table and are now visible to anyone who accesses the cube. You can also write back values for a different scenario. Note

You can read event log entries by defining a System.Diagnostics.EventLog object that points to a specific event log for example, the Application log or the System log. You can create such an object in three ways: by dragging an element from the Server Explorer window to the form s component tray area, by dragging an item from the Component tab of the Toolbox to a form or component s tray area, or entirely through code. In this section, I ll focus on the last method, which also works from inside classes and modules, but the concepts apply to the other two cases as well.

If the report uses a data source that prompts for credentials, you can pass those credentials as URL access parameters. You pass credentials using the following syntax: &dsu:DataSourceName=username&dsp:DataSourceName=password. For example, if your data source is SqlOrder01 and the ReportExecution user has read access to this data source, you can add &dsu:SqlOrder01=ReportExecution&dsp:SqlOrder01=ReportExecution to the URL request for a report.

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