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Xamarin - Dialogs
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  AlertDialog 
// 1. Instantiate an AlertDialog.Builder with its constructor
// the parameter this is the context (usually your activity)
AlertDialog.Builder builder = new AlertDialog.Builder(this);

// 2. Chain together various setter methods to set the dialog characteristics 
builder.SetMessage(Resource.String.dialog_message)
       .SetTitle(Resource.String.dialog_title);

// 3. Get the AlertDialog from create()
AlertDialog dialog = builder.Create();

dialog.Show();
  Simple Alert Dialog Example

We shall create a simple Alert Dialog in Xamarin.Android

Now considering you have gone through the getting started guide (opens new window) from the documentation.

You must be having the project structure like this:

Project Structure (opens new window)

Your Main Activity must be looking like this:


public class MainActivity : Activity
 {
 int count = 1;
 
 protected override void OnCreate(Bundle bundle)
 {
 base.OnCreate(bundle);
 
 // Set our view from the "main" layout resource
 SetContentView(Resource.Layout.Main);
 
 // Get our button from the layout resource,
 // and attach an event to it
 Button button = FindViewById<Button>(Resource.Id.MyButton);
 
 button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
 }
 }

Now What we shall do is, instead of adding one to the counter on button click, we shall ask user if he wants to add or substract one in a simple Alert Dialog

And on Click of the Positive or the negative button we will take the action.


button.Click += delegate {
 AlertDialog.Builder alert = new AlertDialog.Builder(this);
 alert.SetTitle("Specify Action");
 alert.SetMessage("Do you want to add or substract?");

 alert.SetPositiveButton("Add", (senderAlert, args) =>
 {
 count++;
 button.Text = string.Format("{0} clicks!", count);
  });

  alert.SetNegativeButton("Substract", (senderAlert, args) =>
  {
  count--;
  button.Text = string.Format("{0} clicks!", count);
  });

  Dialog dialog = alert.Create();
      dialog.Show();
 };

screenshot:

enter image description here (opens new window)

Parameters

commonly used Public Method Use
SetTitle(String) Sets Title for the dialog
SetIcon(Drawable) Set Icon for the alert dialog
SetMessage(string) Set the message to display.
SetNegativeButton(String, EventHandler) Set a listener to be invoked when the negative button of the dialog is pressed.
SetPositiveButton(String, EventHandler) Set a listener to be invoked when the positive button of the dialog is pressed.
SetNeutralButton(String, EventHandler) Set a listener to be invoked when the neutral button of the dialog is pressed.
SetOnCancelListener(IDialogInterfaceOnCancelListener) Sets the callback that will be called if the dialog is canceled.
SetOnDismissListener(IDialogInterfaceOnDismissListener) Sets the callback that will be called when the dialog is dismissed for any reason.
Show() Creates a AlertDialog with the arguments supplied to this builder and Dialog.Show's the dialog.

Remarks

Requirements

Namespace: Android.App

Assembly: Mono.Android (in Mono.Android.dll)

Assembly Versions: 0.0.0.0

Public Constructors

AlertDialog.Builder(Context) :-

Constructor using a context for this builder and the AlertDialog it creates.

AlertDialog.Builder(Context, Int32) :-

Constructor using a context and theme for this builder and the AlertDialog it creates.

Using Material Design AlertDialog

In order to use the modern AlertDialog:

  1. Install Support v7 AppCompat library from the NuGet packages
  2. Replace AlertDialog with Android.Support.V7.App.AlertDialog or add the following statement at the top to make your dialog shine.

       using AlertDialog = Android.Support.V7.App.AlertDialog;
  AlertDialog 
// 1. Instantiate an AlertDialog.Builder with its constructor
// the parameter this is the context (usually your activity)
AlertDialog.Builder builder = new AlertDialog.Builder(this);

// 2. Chain together various setter methods to set the dialog characteristics 
builder.SetMessage(Resource.String.dialog_message)
       .SetTitle(Resource.String.dialog_title);

// 3. Get the AlertDialog from create()
AlertDialog dialog = builder.Create();

dialog.Show();
  Simple Alert Dialog Example

We shall create a simple Alert Dialog in Xamarin.Android

Now considering you have gone through the getting started guide (opens new window) from the documentation.

You must be having the project structure like this:

Project Structure (opens new window)

Your Main Activity must be looking like this:


public class MainActivity : Activity
 {
 int count = 1;
 
 protected override void OnCreate(Bundle bundle)
 {
 base.OnCreate(bundle);
 
 // Set our view from the "main" layout resource
 SetContentView(Resource.Layout.Main);
 
 // Get our button from the layout resource,
 // and attach an event to it
 Button button = FindViewById<Button>(Resource.Id.MyButton);
 
 button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
 }
 }

Now What we shall do is, instead of adding one to the counter on button click, we shall ask user if he wants to add or substract one in a simple Alert Dialog

And on Click of the Positive or the negative button we will take the action.


button.Click += delegate {
 AlertDialog.Builder alert = new AlertDialog.Builder(this);
 alert.SetTitle("Specify Action");
 alert.SetMessage("Do you want to add or substract?");

 alert.SetPositiveButton("Add", (senderAlert, args) =>
 {
 count++;
 button.Text = string.Format("{0} clicks!", count);
  });

  alert.SetNegativeButton("Substract", (senderAlert, args) =>
  {
  count--;
  button.Text = string.Format("{0} clicks!", count);
  });

  Dialog dialog = alert.Create();
      dialog.Show();
 };

screenshot:

enter image description here (opens new window)

Parameters

commonly used Public Method Use
SetTitle(String) Sets Title for the dialog
SetIcon(Drawable) Set Icon for the alert dialog
SetMessage(string) Set the message to display.
SetNegativeButton(String, EventHandler) Set a listener to be invoked when the negative button of the dialog is pressed.
SetPositiveButton(String, EventHandler) Set a listener to be invoked when the positive button of the dialog is pressed.
SetNeutralButton(String, EventHandler) Set a listener to be invoked when the neutral button of the dialog is pressed.
SetOnCancelListener(IDialogInterfaceOnCancelListener) Sets the callback that will be called if the dialog is canceled.
SetOnDismissListener(IDialogInterfaceOnDismissListener) Sets the callback that will be called when the dialog is dismissed for any reason.
Show() Creates a AlertDialog with the arguments supplied to this builder and Dialog.Show's the dialog.

Remarks

Requirements

Namespace: Android.App

Assembly: Mono.Android (in Mono.Android.dll)

Assembly Versions: 0.0.0.0

Public Constructors

AlertDialog.Builder(Context) :-

Constructor using a context for this builder and the AlertDialog it creates.

AlertDialog.Builder(Context, Int32) :-

Constructor using a context and theme for this builder and the AlertDialog it creates.

Using Material Design AlertDialog

In order to use the modern AlertDialog:

  1. Install Support v7 AppCompat library from the NuGet packages
  2. Replace AlertDialog with Android.Support.V7.App.AlertDialog or add the following statement at the top to make your dialog shine.

       using AlertDialog = Android.Support.V7.App.AlertDialog;
  AlertDialog 
// 1. Instantiate an AlertDialog.Builder with its constructor
// the parameter this is the context (usually your activity)
AlertDialog.Builder builder = new AlertDialog.Builder(this);

// 2. Chain together various setter methods to set the dialog characteristics 
builder.SetMessage(Resource.String.dialog_message)
       .SetTitle(Resource.String.dialog_title);

// 3. Get the AlertDialog from create()
AlertDialog dialog = builder.Create();

dialog.Show();
  Simple Alert Dialog Example

We shall create a simple Alert Dialog in Xamarin.Android

Now considering you have gone through the getting started guide (opens new window) from the documentation.

You must be having the project structure like this:

Project Structure (opens new window)

Your Main Activity must be looking like this:


public class MainActivity : Activity
 {
 int count = 1;
 
 protected override void OnCreate(Bundle bundle)
 {
 base.OnCreate(bundle);
 
 // Set our view from the "main" layout resource
 SetContentView(Resource.Layout.Main);
 
 // Get our button from the layout resource,
 // and attach an event to it
 Button button = FindViewById<Button>(Resource.Id.MyButton);
 
 button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
 }
 }

Now What we shall do is, instead of adding one to the counter on button click, we shall ask user if he wants to add or substract one in a simple Alert Dialog

And on Click of the Positive or the negative button we will take the action.


button.Click += delegate {
 AlertDialog.Builder alert = new AlertDialog.Builder(this);
 alert.SetTitle("Specify Action");
 alert.SetMessage("Do you want to add or substract?");

 alert.SetPositiveButton("Add", (senderAlert, args) =>
 {
 count++;
 button.Text = string.Format("{0} clicks!", count);
  });

  alert.SetNegativeButton("Substract", (senderAlert, args) =>
  {
  count--;
  button.Text = string.Format("{0} clicks!", count);
  });

  Dialog dialog = alert.Create();
      dialog.Show();
 };

screenshot:

enter image description here (opens new window)

Parameters

commonly used Public Method Use
SetTitle(String) Sets Title for the dialog
SetIcon(Drawable) Set Icon for the alert dialog
SetMessage(string) Set the message to display.
SetNegativeButton(String, EventHandler) Set a listener to be invoked when the negative button of the dialog is pressed.
SetPositiveButton(String, EventHandler) Set a listener to be invoked when the positive button of the dialog is pressed.
SetNeutralButton(String, EventHandler) Set a listener to be invoked when the neutral button of the dialog is pressed.
SetOnCancelListener(IDialogInterfaceOnCancelListener) Sets the callback that will be called if the dialog is canceled.
SetOnDismissListener(IDialogInterfaceOnDismissListener) Sets the callback that will be called when the dialog is dismissed for any reason.
Show() Creates a AlertDialog with the arguments supplied to this builder and Dialog.Show's the dialog.

Remarks

Requirements

Namespace: Android.App

Assembly: Mono.Android (in Mono.Android.dll)

Assembly Versions: 0.0.0.0

Public Constructors

AlertDialog.Builder(Context) :-

Constructor using a context for this builder and the AlertDialog it creates.

AlertDialog.Builder(Context, Int32) :-

Constructor using a context and theme for this builder and the AlertDialog it creates.

Using Material Design AlertDialog

In order to use the modern AlertDialog:

  1. Install Support v7 AppCompat library from the NuGet packages
  2. Replace AlertDialog with Android.Support.V7.App.AlertDialog or add the following statement at the top to make your dialog shine.

       using AlertDialog = Android.Support.V7.App.AlertDialog;
  AlertDialog 
// 1. Instantiate an AlertDialog.Builder with its constructor
// the parameter this is the context (usually your activity)
AlertDialog.Builder builder = new AlertDialog.Builder(this);

// 2. Chain together various setter methods to set the dialog characteristics 
builder.SetMessage(Resource.String.dialog_message)
       .SetTitle(Resource.String.dialog_title);

// 3. Get the AlertDialog from create()
AlertDialog dialog = builder.Create();

dialog.Show();
  Simple Alert Dialog Example

We shall create a simple Alert Dialog in Xamarin.Android

Now considering you have gone through the getting started guide (opens new window) from the documentation.

You must be having the project structure like this:

Project Structure (opens new window)

Your Main Activity must be looking like this:


public class MainActivity : Activity
 {
 int count = 1;
 
 protected override void OnCreate(Bundle bundle)
 {
 base.OnCreate(bundle);
 
 // Set our view from the "main" layout resource
 SetContentView(Resource.Layout.Main);
 
 // Get our button from the layout resource,
 // and attach an event to it
 Button button = FindViewById<Button>(Resource.Id.MyButton);
 
 button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
 }
 }

Now What we shall do is, instead of adding one to the counter on button click, we shall ask user if he wants to add or substract one in a simple Alert Dialog

And on Click of the Positive or the negative button we will take the action.


button.Click += delegate {
 AlertDialog.Builder alert = new AlertDialog.Builder(this);
 alert.SetTitle("Specify Action");
 alert.SetMessage("Do you want to add or substract?");

 alert.SetPositiveButton("Add", (senderAlert, args) =>
 {
 count++;
 button.Text = string.Format("{0} clicks!", count);
  });

  alert.SetNegativeButton("Substract", (senderAlert, args) =>
  {
  count--;
  button.Text = string.Format("{0} clicks!", count);
  });

  Dialog dialog = alert.Create();
      dialog.Show();
 };

screenshot:

enter image description here (opens new window)

Parameters

commonly used Public Method Use
SetTitle(String) Sets Title for the dialog
SetIcon(Drawable) Set Icon for the alert dialog
SetMessage(string) Set the message to display.
SetNegativeButton(String, EventHandler) Set a listener to be invoked when the negative button of the dialog is pressed.
SetPositiveButton(String, EventHandler) Set a listener to be invoked when the positive button of the dialog is pressed.
SetNeutralButton(String, EventHandler) Set a listener to be invoked when the neutral button of the dialog is pressed.
SetOnCancelListener(IDialogInterfaceOnCancelListener) Sets the callback that will be called if the dialog is canceled.
SetOnDismissListener(IDialogInterfaceOnDismissListener) Sets the callback that will be called when the dialog is dismissed for any reason.
Show() Creates a AlertDialog with the arguments supplied to this builder and Dialog.Show's the dialog.

Remarks

Requirements

Namespace: Android.App

Assembly: Mono.Android (in Mono.Android.dll)

Assembly Versions: 0.0.0.0

Public Constructors

AlertDialog.Builder(Context) :-

Constructor using a context for this builder and the AlertDialog it creates.

AlertDialog.Builder(Context, Int32) :-

Constructor using a context and theme for this builder and the AlertDialog it creates.

Using Material Design AlertDialog

In order to use the modern AlertDialog:

  1. Install Support v7 AppCompat library from the NuGet packages
  2. Replace AlertDialog with Android.Support.V7.App.AlertDialog or add the following statement at the top to make your dialog shine.

       using AlertDialog = Android.Support.V7.App.AlertDialog;



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https://develop.horje.com/learn/1434/reference

 

Horje