C# Nested Switch Statement

Nested Switch C#Net code

private void button1_Click(object sender, EventArgs e)
        {
            switch(textBox1.Text){// outer switch statement c#
                case "1":
                    System.Diagnostics.Debug.Print("1");
                    switch (textBox2.Text)// inner switch statement c#
                    {
                        case "a":
                            System.Diagnostics.Debug.Print("1a");
                            break;
                        case "b":
                            System.Diagnostics.Debug.Print("1b");
                            break;
                        default:
                            System.Diagnostics.Debug.Print("1NA");
                            break;
                    }
                    break;
                case "2":
                    switch (textBox2.Text)// second nested switch statement c#.net
                    {
                        case "a":
                            System.Diagnostics.Debug.Print("2a");
                            break;
                        case "b":
                            System.Diagnostics.Debug.Print("2b");
                            break;
                        default:
                            System.Diagnostics.Debug.Print("2NA");
                            break;
                    }
                    break;
                case "3":
                    switch (textBox2.Text)// third nested switch statement in c#
                    {
                        case "a":
                            System.Diagnostics.Debug.Print("3a");
                            break;
                        case "b":
                            System.Diagnostics.Debug.Print("3b");
                            break;
                        default:
                            System.Diagnostics.Debug.Print("3NA");
                            break;
                    }
                    break;
                default:
                    switch (textBox2.Text)// default section of outer switch statement
                    {
                        case "a":
                            System.Diagnostics.Debug.Print("DEFAULTa");
                            break;
                        case "3b":
                            System.Diagnostics.Debug.Print("DEFAULTb");
                            break;
                        default:
                            System.Diagnostics.Debug.Print("DEFAULTNA");
                            break;
                    }
                    break;
            }
        }

Please note that the same nested switch logic can be reused in C++ and Java languages with a little language specific changes.

Switch statement is a very important programming language construct, appropriate usage can significantly speed up your code.
Keeping the importance of nested switch statement I've decided to put together a quick code example and make it available for the welfare of programmer community.

Example Background:
In case of this C# switch statement example, we have two text boxes and a button placed on a WinForm, when the user puts some text inside the first text box some text in second text box and then clicks the button our switch statement is fired in a button click handler.

The results are being printed using System.Diagnostics.Debug.Print function which cause them to show up in output console.

The user can enter 1, 2, or 3 in first text box and values a, b, or c in second text box. Anything else is handled in nested default sections.

C# .Net nested switch might not be used very commonly, but you never know when you'll run into a problem that's better handled by the gimmick like consumption of the construct. The exact code of a nested switch statement in C# .Net programming language is given at the beginning of this article.

C++ char array to string

The c style null terminated arrays might be considered a thing of past by many but as a matter fact these things are still there are used in many many large scale legacy software.\

Just recently I observed that a lot of people are trying to find an easy way to make a string out of a character array in C++ so I thought I should write a post and help the poor souls stuck in dark chambers of C++.

Without any further ado, the C++ code to achieve this extremely difficult task is given below.

char array to string c++

iPhone UDID using iTunes

How to find iPhone UDID (Unique Device Identifier using iTunes)

Plug your phone in to your PC/laptop and start iTunes software.

Click on phone icon highlighted in image below, don’t click the eject button

Another UI screen will be shown as a result of this click, the UI screen looks like following:

Only after a single click, the text label will start displaying the UDID of the phone which is needed for enabling testing on tester devices. 

Right click the cryptic looking alpha-numeric string and select copy. Please note that I have distorted the UDID intentionally.

Now you can paste it anywhere and email me, or even get it tattooed on the biceps.

What is a UDID?

The iOS device UDID is added to a provisioning profile, it allows ad-hoc deployment of your apps during testing to the iOS devices of your testers. You would've already guessed that its a unique identifier and no other Apple mobile device will have this identifier on it.

Please note that only 100 iOS devices be it iPhone/iPod/iPad can be added to a single Apple Developer Account.

In case of Android, you can create a development build and send the apk file to any number of people who may deploy it on any number of devices.

How to create PhoneStateReceiver get CLI and call events

During first 5 years of my career I luckily worked at software houses that created computer telephony related software, I had used Microsoft TAPI and Dialogic APIs to create IVR and Operator Console and Call Recorder software. When I first started Android programming in 2010, I was very curious about phone states and CLI. 

I later figured it out and came to know that a BroadcastReceiver will be the right thing to use in this case. BroadcastReceiver is a specially designed component offered by Android OS, and it is used to handle various broadcasts sent by apps or OS components. The broadcasts related to telephone call states are sent by TelephonyManager which is a component of Android OS. The phone state receiver given below can be used in scenarios like call blocking, call tracking, and sending information to http or cloud based servers. This salient features of my phone state receiver are given below Get the CLI from an incoming call Get the dialled number from an outgoing call When an inbound call is connected, get informed When a call is disconnected, get notified

Incoming SMS Receivers Stop Work Google Hangouts Is Villain

I'm working on an app which notifies a Windows desktop/laptop when a new SMS text message arrives on an Android phone, this app does not do anything else to the text of incoming SMS. It only reads and notifies the laptop using Bluetooth(or WiFi).

My app stopped working all of a sudden, and I didn't know what was wrong. There's a nice blog entry on making your app compatible with Android 4 KitKat, I read it thoroughly but in the end I discovered my will not be affected since it's too benign and only the apps that might cause trouble for other apps.

My sixth sense raised an alarm shortly afterwards, that perhaps this issue is being caused by Google Hangouts. I had allowed Google Hangouts to take care of my SMS messages a few hours ago, without knowing it will screw my poor app.
I got Android 4.3.3 running on Sony Xperia Z smart phone.
Given below are screen shots from Hangouts app settings.

So, if your SMS receiver stops working all of a sudden do make sure Google Hangouts is not the culprit.

Android KitKat has got its own style of handling SMS messages, but still I don't see a point in why Google Hangouts will break 3rd party apps that need to only read SMS messages.

On a side note, I did think once that maybe this error is caused an up version of Android because my app was working well on my older QMobile A50 which sports Android Jelly Bean 4.1.3.

In case you're wondering what permissions are needed to make a new SMS broadcast receiver work, well I got the following:

<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />