Store Images On App Directory in Xamarin iOS

In this blog, you will learn how to Store Images On App Directory in Xamarin iOS.

Introduction

Xamarin is a platform to develop cross-platform and multi-platform apps (for example, Windows phone, Android, iOS). In Xamarin platform, the code sharing concept is used. In Xamarin Studio, Visual Studio is also available.


Browse Code Here


Prerequisites

• Xamarin Studio.
• Xcode.

The steps given below are required to be followed in order to Store Images On App Directory in Xamarin iOS, using Xamarin Studio.

Step 1

Go To Xamarin Studio.

Click New Solution—> select iOS—>select App--> Choose single View App. Afterwards, click Next.

Step 2

In this step, configure your app. Give the app name (Ex:sample), Organization Identifier. Afterwards, click Next.

Step 3

In this step, give your project name (Ex: Sample) and solution name (Ex: Sample). Give the path of your project. Afterwards, click Create.

Step 4

Subsequently, go to the solution. In the solution, get all the files and sources in your project. Now, select Main.storyboard and double click to open Main.storyboard page.

Step 5

After opening the Main.storyboard, you can design this page, as per your desire.

Step 6

In this step design your app.using storyboard, Toolbox and Properties.

1. Button(btnStore).
2. Label(lblPath)
3. ImageView(imgProfile).

Step 7

In this step, add the Image form your Local system.

Go to Solution—>Resource-->Right click-->Add-->Add Files.Now, you can choose the required Image. Click open.

Next, choose Copy the Files to the directory. Afterwards, click Ok.

Step 8


In this step, go to the ViewController.cs page. write the code given below.

ViewController.cs

using System;
using System.IO;
using Foundation;
using UIKit;

namespace XamariniOSImageStore
{
 public partial class ViewController : UIViewController
 {
  protected ViewController(IntPtr handle) : base(handle)
  {
   // Note: this .ctor should not contain any initialization logic.
  }

  string fileName;
  string folderPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
  int Count = 0;
  public override void ViewDidLoad()
  {
   base.ViewDidLoad();
   // Perform any additional setup after loading the view, typically from a nib.
  }

  partial void UIButton8_TouchUpInside(UIButton sender)
  {
   StoreImage("Xamarin.jpg");
  }

  public void StoreImage(string filename)
  {
   if (File.Exists(fileName))
   {
    Count++;
    string filenames = "image" + Count.ToString() + ".jpg";
    fileName = Path.Combine(folderPath, filenames);
   }
   else
   {
    fileName = Path.Combine(folderPath, "image.jpg");
   }

   var img = UIImage.FromFile(filename);

   NSData image = img.AsJPEG();
   NSError err = null;


   image.Save(fileName, false, out err);

   lblPath.Text = "File Path:" + fileName;
   imgProfile.Image = UIImage.FromFile(fileName);

  }



  public override void DidReceiveMemoryWarning()
  {
   base.DidReceiveMemoryWarning();
   // Release any cached data, images, etc that aren't in use.
  }
 }
}

Step 9

Now, go to Run option , choose Debug and the list of iPhone and iPad simulators, which are available. You can choose any one simulator and run it.

Output

After a few seconds, the app will start running on your iPhone simulator.You will see your app working successfully.

You can click Store Button, The image will be Store Successfully.

After, Go to check your App Directory

Summary

This was the process of how to Store Images On App Directory  in Xamarin ios , using Xamarin Studio.

Xamariin.Forms- Working With Directory Using DependencyService

In this article you will learn how to Create a Directory , Rename Directory and Delete using DependencyService in Xamarin forms. 

Introduction

Xamarin.Forms code runs on multiple platforms - each of which has its own filesystem. This means that reading and writing files is most easily done using the native file APIs on each platform. Alternatively, embedded resources are a simpler solution to distribute data files with an app.

User-writable-storage can be implemented natively and then accessed using the DependencyService .

DependencyService

DependencyService allows apps to call into platform-specific functionality from shared code. This functionality enables Xamarin.Forms apps to do anything that a native app can do.

DependencyService is a dependency resolver. In practice, an interface is defined and DependencyService finds the correct implementation of that interface from the various platform projects.


Xamarin.Forms apps need three components to use DependencyService:

• Interface – The required functionality is defined by an interface in shared code.
• Implementation Per Platform – Classes that implement the interface must be added to each platform project.
• Registration – Each implementing class must be registered with DependencyService via a metadata attribute. Registration enables DependencyService to find the implementing class and supply it in place of the interface at run time.
• Call to DependencyService – Shared code needs to explicitly call DependencyService to ask for implementations of the interface.

Following Topic Covered.

1.Create Directory 
2.Rename Directory 
3.Delete Directory

Related Post: Xamarin.Forms - Working With Files Using DependencyService

Prerequisites

• Visual Studio 2017(Windows or Mac)

The steps given below are required to be followed in order to Create a Directory , Rename Directory and Delete using DependencyService in Xamarin.Forms, using Visual Studio.

Setting up a Xamarin.Forms Project


Start by creating a new Xamarin.Forms project.  you’ll learn more by going through the steps yourself.

Choose the Xamarin.Forms App Project type under Cross-platform/App in the New Project dialog.

Name your app, select “Use Portable Class Library” for shared code, and target both Android and iOS.

You probably want your project and solution to use the same name as your app. Put it in your preferred folder for projects and click Create.

You now have a basic Xamarin.Forms app. Click the play button to try it out.

Creating Interface

Create a interface in Xamarin.Forms PCL

Go to Solution—>PCL—>Right click—>New—>Empty Class—>IDirectory.cs

Now, Write the following code.

IDirectory.cs

Implementation per Platform

iOS Implementation

Go to Solution—>iOS—>Right click—>New—>Empty Class—> DirectoryHelper.cs

Now, Write the following code given below.

DirectoryHelper.cs

Android Implementation

Go to Solution—>Droid—>Right click—>New—>Empty Class—> DirectoryHelper.cs

Now, Write the following code given below.

DirectoryHelper.cs

Setting up the User Interface. 

Go MainPage.Xaml and write following code.

MainPage.Xaml

Call to DependencyService

In this step Call to DependencyService for your PCL.

Click the play button to try it out.

I hope you will understand how to Create Directory , Rename Directory and Delete a file using use DependencyService.


Summary

This was the process of how to reate Directory , Rename Directory and Delete using DependencyService in Xamarin.Forms.

Thanks For Reading.

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