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public ArrayList dataRows; } This class consists of three, serializable ArrayList objects that contain column names, column types, and data rows. The serialization process now involves the GhostDataTable class rather than the DataTable object, as shown here: private void BinarySerialize(DataTable dt, string outputFile) { BinaryFormatter bf = new BinaryFormatter(); StreamWriter swBin = new StreamWriter(outputFile); // Instantiate and fill the worker class GhostDataTable ghost = new GhostDataTable(); CreateTableGraph(dt, ghost); // Serialize the object bf.Serialize(swBin.BaseStream, ghost); swBin.Close(); } The key event here is how the DataTable object is mapped to the GhostDataTable class. The mapping takes place in the folds of the CreateTableGraph routine. Mapping Table Information The CreateTableGraph routine populates the colNames array with column names and the colTypes array with the names of the data types, as shown in the following code. The dataRows array is filled with an array that represents all the values in the row. void CreateTableGraph(DataTable dt, GhostDataTable ghost) { // Insert column information (names and types) foreach(DataColumn col in dt.Columns) { ghost.colNames.Add(col.ColumnName); ghost.colTypes.Add(col.DataType.FullName); } // Insert rows information foreach(DataRow row in dt.Rows) ghost.dataRows.Add(row.ItemArray); } The DataRow object's ItemArray property is an array of objects. It turns out to be particularly handy, as it lets you handle the contents of the entire row as a single, monolithic piece of data. Internally, the get accessor of ItemArray is implemented as a simple loop that reads and stores one column after the next. The set accessor is even 345

Although lambda expressions can t contain Visual Basic statements such as For... Next loops, you can still build up some pretty complex calculations using standard operators. Calls out to other functions can also appear in lambdas. In this code sample, mult defers its work to the MultiplyIt function:

Once an output stream is obtained, the application can begin writing data using one of the various methods of the OutputStream. To make life easier, an OutputStream can be wrapped inside of other stream classes that provide richer data support when writing to the stream. For example, an OutputStream could be passed to a OutputStreamWriter to provide the means for dealing with character-based stream content rather than byte-based content. The OutputStreamWriter acts as a filter, converting the characters passed to the OutputStreamWriter methods into a byte representation of the data and passing this on to the appropriate OutputStream method.

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A relational join produces a new table by combining the rows of two tables. For each pair of rows for which a join condition is true, the new table contains a row with all field values from both joined rows. In ANSI SQL, the join clause specifies a table join; the join condition follows the on keyword. For example, to retrieve all items that have bids, you join the ITEM and the BID table on their common ITEM_ID attribute:

You can ask a Type object for all its members using the GetMembers() method of the Type class, which lists all the methods, properties, and fields, as shown in Example 17-6.

If you need more advanced user management than that provided by Joomla (and most community web sites will), you will want to download and install CB. Although the registration system independent of Joomla s standard user table can present some challenges, the extra functionality provided makes it worth the effort.

Now that you have your account provisioned, you need to create a project on Azure to host your account.

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If either computer is running an earlier version of Windows, Remote Assistance in Windows Vista reverts to the capabilities of the earlier version. New connectivity features such as NAT traversal using Teredo are unavailable, as are the performance enhancements introduced with Windows Vista. Remote Assistance in Windows Vista does not support voice chat, which was supported in earlier versions. Pausing a session (the expert can t see what occurs while a session is paused) is a feature that s new to Windows Vista. If a novice running Windows Vista pauses a session, an expert running an earlier version receives no indication that the session has been paused. You cannot offer assistance from a computer running an earlier version, nor can you use instant messenger to offer assistance from a computer running Windows Vista to a computer running an earlier version. Invitation files created on a computer with the Windows Vista only option enabled (see Figure 9-11) are completely encrypted and cannot be used on computers running earlier versions.

basedir compress destfile duplicate encoding filesonly index Directory from which to archive files; optional. [File] Sets whether to compress the files or only store them; optional, default=true;. [Boolean] The file to create; required. [File] Sets behavior for when a duplicate file is about to be added. [add, preserve, fail] Encoding to use for file names, defaults to the platform s default encoding. [String] If true, emulates Sun s JAR utility by not adding parent directories; optional, defaults to false. [Boolean] Sets whether to create an index list for classes. [Boolean]

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