generate qr code asp.net mvc

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First we create an ArrayList to hold the result. Then we use a for loop to step through the numbers, adding each number to the result ArrayList. Finally we convert the ArrayList to an array and display the result. This is a straightforward approach to creating the array, but requires several steps. Using loops in subexpressions, we can simplify it quite a bit. Here s the rewritten example:

You don t always want to use cascading for every relationship you have. For instance, you would not want to remove the related Computer or Tasks when removing an Employee entity from the database, because these entities have a life span that is usually longer than the employee. You might not want to cascade merges because you may have fetched stale data from the database or simply not filled the relationship in one particular business operation. For performance reasons, you may also not want to refresh all the relationships an entity has because this would cause more round trips to the database. Be aware how your entities will be used before deciding on the cascade type. If you are unsure of their use, then you should turn off cascading entirely and enable it on a per-case basis. Remember, cascading is simply a convenient tool for reducing the EntityManager API calls. It s very easy to trigger expensive database calls, which may result in unnecessary multitable joins.

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namespace Example_15_1_ _ _ _Comparing_Strings { class Tester { public void Run( ) { // create some strings to work with string s1 = "abcd"; string s2 = "ABCD"; int result; // hold the results of comparisons // compare two strings, case-sensitive result = string.Compare(s1, s2); Console.WriteLine("Compare s1: {0}, s2: {1}, result: {2}\n", s1, s2, result); // overloaded compare, takes Boolean "ignore case" //(true = ignore case) result = string.Compare(s1, s2, true); Console.WriteLine("Compare insensitive. result: {0}\n", result); } static void Main( ) { Tester t = new Tester( ); t.Run( ); } } }

CCNode is the base class for all nodes. It s an abstract class that has no visual representation and defines all properties and methods common to all nodes.

< xml version="1.0" encoding="utf-8" > <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.msi.manning.unlockingandroid"> <application android:icon="@drawable/icon"> <activity android:name=".AWhereDoYouLive" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-permission android:name="android.permission.INTERNET" /> </manifest>

At times, you ll want to validate that a user s entry falls within a specific range. That range can be within a pair of numbers, characters, or dates. In addition, you can express the boundaries for the range by using constants or by comparing its value with values found in other controls. In this example, you ll prompt the user for a number between 10 and 20, and then validate the answer to ensure it was entered properly. To do so, create a new AJAXenabled web site named RangeValidator. You ll create this exercise entirely in Design mode. To begin, drag four controls onto your page: a label, a text box, a button, and of course, a RangeValidator control, as shown in Figure 5-6.

In this chapter, you went through building a simple Active Record implementation from the ground up. You started with the SQLite C APIs and built a wrapper around them to make data access using SQL less of a chore. From there, you used a simple class as the basis for saving and retrieving your model objects from the database. Then you took a quick foray into the world of migrations, making sure that you can build on earlier versions of your database when moving to the next version of your application. Finally, I discussed a few alternatives to this implementation. I hope you now have a good working knowledge of the SQLite APIs available on the iPhone and a good basis for building a data-driven application. I look forward to hearing about what you do with it!

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other words, I need to take that hardcoded $computername variable and turn it into an input parameter. PowerShell makes this really easy, and the next listing shows the result.

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