.net barcode reader open source DATA B INDING in .net C#

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ref class C : I { public: virtual void f() { // ... } }; int main() { R<C^>^ r = gcnew R<C^>(gcnew C()); }

Earlier, I discussed some of the new easing effects in WPF4.0. Let s take a look at the BounceEase effect, which animates an element to makes it look like a ball bouncing up and down that gradually loses height with each bounce. The level of springiness can be controlled through the adeptly named Bounciness property, in which lower numbers are more bouncy (e.g., a rubber ball) than higher numbers (e.g., a cricket ball). This XAML shows how to apply a BounceEase effect to an image (note you will have to start this storyboard to see the animation): <Canvas> <Canvas.Resources> <Storyboard x:Name="bounceyAnim"> <DoubleAnimation Duration="0:0:3" From="0" To="300" Storyboard.TargetName="myPic" Storyboard.TargetProperty="(Canvas.Top)"> <DoubleAnimation.EasingFunction> <BounceEase Bounciness="2" Bounces="5" EasingMode="EaseOut"></BounceEase> </DoubleAnimation.EasingFunction> </DoubleAnimation> </Storyboard> </Canvas.Resources> <Image Source="/pic1.jpg" Width="200" Height="200" Canvas.Left="50" Canvas.Top="50" x:Name="myPic"></Image> </Canvas>

Child objects can optionally be created through data binding, in which case the addition is handled by overriding the AddNewCore() method in the collection class.

Caution You must give the ASP.NET worker process read-write access permissions to the referral cache

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I think this is pretty incredible. What a difference physical data layout can make! Table 11-5 summarizes the results. Table 11-5. Investigating the Effect of Physical Data Layout on the Cost of Index Access

Oracle9i introduced external tables as a method to read external data into the database. Oracle 10g introduced the ability to go the other direction and use a CREATE TABLE statement to create external data, to unload data from the database. As of Oracle 10g, this data is extracted in a proprietary binary format known as Data Pump format, which is the same format the EXPDP and IMPDP tools provided by Oracle to move data from database to database use. Using the external table unload is actually quite easy as easy as a CREATE TABLE AS SELECT statement. To start, we need a DIRECTORY object: ops$tkyte@ORA11GR2> create or replace directory tmp as "/tmp" 2 / Directory created. Now we are ready to unload data to this directory using a simple SELECT statement, for example: ops$tkyte@ORA11GR2> create table all_objects_unload 2 organization external 3 ( type oracle_datapump 4 default directory TMP 5 location( "allobjects.dat" ) 6 ) 7 as 8 select 9 * 10 from all_objects 11 / Table created. I purposely chose the ALL_OBJECTS view because it is a quite complex view with lots of joins and predicates. This shows you can use this datapump unload technique to extract arbitrary data from your database. We could add predicates or whatever we wanted to extract a slice of data.

2. Click the Security tab and check the Allow Test Roots box. The certificates used in this sample are not created by a certification authority and they will be rejected if you do not check this box. You should be careful not to allow test roots in the configuration of a production application. 3. Click the Diagnostics tab and check Enable Message Trace. This will allow you to examine SOAP messages like the ones in Listings 6-1 and 6-2. 4. Click OK to accept the changes and close the dialog. All the changes made by the WSE Settings Tool are saved in the web.config file, as shown in Listing 6-5. Listing 6-5. Changes Made by the WSE Configuration Tool <configuration> <configSections> <section name="microsoft.web.services3" type="Microsoft.Web.Services3.Configuration.WebServicesConfiguration, Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </configSections> <system.web> <webServices> <soapExtensionImporterTypes> <add type="Microsoft.Web.Services3.Description.WseExtensionImporter, Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </soapExtensionImporterTypes> <soapServerProtocolFactory type="Microsoft.Web.Services3.WseProtocolFactory, Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />

Suppose now that you would like the same functionality for values of type float. There are several ways you could achieve this. One way is to perform the following steps to produce the subsequent code: Cut and paste the code for class MyIntStack. Change the class name to MyFloatStack. Change the appropriate int declarations to float declarations throughout the class declaration. class MyFloatStack { int StackPointer = 0; float [] StackArray; float float public void Push( float x ) { ... } float public float Pop() { ... } ... } This method certainly works, but it s error-prone, and has the following drawbacks: You need to inspect every part of the class carefully to determine which type declarations need to be changed, and which should be left alone. You need to repeat the process for each new type of stack class you need (long, double, string, etc.). After the process, you end up with multiple copies of nearly identical code, taking up additional space. Debugging and maintaining the parallel implementations is inelegant and error-prone.

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