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This makes the connection to the Yahoo! server to fetch historical data of about 10 years by using an object derived from the WebClient class, which is defined in the System.Net namespace. To use this, you use its OpenRead method, which is pointed at a URI. This returns a stream, which can be read by a StreamReader. The contents of this can be parsed into a string using a CsvParser abstract helper class. This helper class provides the parsing functionality that reads the CSV information and returns it as a DataTable. The Source Code/Download area of the Apress web site ( includes a version of this class that was derived from one published in the excellent blog from Andreas Knab at The call to the Yahoo! iFinance server provides the entire price history for the stock, which can be thousands of days worth of information. It provides an additional layer that allows you to crop this data to the specified number of days by iterating through the DataTable and removing rows beyond what you are interested in. So if you want to pull 10 days worth of data, you can modify the query to Yahoo! iFinance accordingly or simply remove all rows beyond number 10. That s about it. This web method is present in a web service called DataTier.
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behind the saved image. You may have to drag them in the Objects and Timeline panel to re-
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Listing 8-7. Code Listing for the IsMessageEncrypted Method
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Given a collection s enumerator, you should be able to simulate a foreach loop by cycling through the items in the collection using the MoveNext and Current members. For example, you know that arrays are enumerable, so the following code does manually what the foreach statement does automatically. In fact, the C# compiler generates exactly this code when you write a foreach loop. static void Main() { int[] MyArray = { 10, 11, 12, 13 }; IEnumerator ie = MyArray.GetEnumerator(); while ( ie.MoveNext() ) { int i = (int) ie.Current; Console.WriteLine("{0}", i); } } This code produces the following output: 10 11 12 13
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doing in Figure 5-10, and release it.
The GridView control has a CommandField column, which automatically creates a Delete link for each row of data. If the user clicks a Delete link, the GridView deletes that row of data by calling its data source control, ProjectListDataSource. The result is a DeleteObject event handled in the page: Protected Sub ProjectListDataSource_DeleteObject( _ ByVal sender As Object, ByVal e As Csla.Web.DeleteObjectArgs) _ Handles ProjectListDataSource.DeleteObject Try ProjectTracker.Library.Project.DeleteProject( _ New Guid(e.Keys("Id").ToString)) e.RowsAffected = 1
create tablespace ts_16k * ERROR at line 1: ORA-29339: tablespace block size 16384 does not match configured block sizes ops$tkyte%ORA11GR2> show parameter 16k NAME TYPE VALUE ------------------------------------ ----------- -----------------------------db_16k_cache_size big integer 0 Right now, since I have not configured a 16KB cache, I can t create such a tablespace. I could do one of a couple of things right now to rectify this situation. I could set the db_16k_cache_size parameter and restart the database. I could shrink one of my other SGA components in order to make room for a 16KB cache in the existing SGA. Or, I might be able to just allocate a 16KB cache if the SGA_MAX_SIZE parameter was larger than my current SGA size.
Figure 9-7. Adding the flat file disassembler
Although the previous recipe works well for flat objects where the default normal is constant for all the pixels in all triangles, you ll run into trouble if you want to bump map a curved or cornered surface. The main problem is that the bump map contains the deviated normal in tangent coordinates, meaning relative to the default normal. To visualize the problem, let s say you want to render a cylinder, as shown in Figure 5-30. The left side of the figure shows the default normals in the vertices of the cylinder.
Public Property Value() As V Get Return mValue End Get Set(ByVal value As V) mValue = value End Set End Property Public Sub New(ByVal key As K, ByVal value As V) mKey = key mValue = value End Sub End Class Because it is nested inside NameValueListBase, it has access to the K and V generic type parameters. These type parameters are used to define the types of the key and value items stored in each child object. Thanks to the code in the Csla.Core.ReadOnlyBindingList and in the .NET BindingList base classes, all the hard work is already done. The NameValueListBase is now a fully functioning read-only collection of name/value data. It even supports data binding to Windows Forms and Web Forms.
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