Cordova Upload Images using File Transfer Plugin and .Net core WebAPI

时间：2018-07-19 12:58:31 阅读：191 评论：0 收藏：0 [点我收藏+]

In this article, I am going to explain ,"How to Upload Images to the server using Cordova File Transfer Plugin and Asp.Net core Web API".

Requirements

Web API (you can use local IIS servers to host your API)
Cordova Camera Plugin (cordova-plugin-camera)
Cordova File Transfer Plugin (cordova-plugin-filetransfer)

Steps

1. Build Asp.net core Web API.

2. Camera Plugin to use mobile camera.

3. Upload Images using File transfer plugin.

SERVER SIDE:

Follow the link below to built Image Upload REST API Using ASP.NET Core.

Follow the link to Host ASP.NET Core Web API on IIS.

MOBILE APP:

Create New project on Visual Studio.

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Select JavaScript
Select Mobile Apps
Select Blank APP (Cordova APP)
Provide Project Name
Select Location that you want to store your project.
Click on OK

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Our Project looks like this.

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Adding Plugin:

Open config.xml
Go to Plugin.
Click on Camera. (cordova-plugin-camera)
Click on Add.
Similarly Add File Transfer Plugin(cordova-plugin-file-transfer)

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You can see that our installed plugin is on the installed tab.

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Now open your index.html and add following div.

<div class="row">
      <div class="profile-header-container">
         <div class="profile-header-img">
             <div id="image">
                 <img class=‘img-circle‘ width=‘120‘ height=‘120‘ src=‘images/USER.jpg‘ />
             </div>
             <div class="rank-label-container">
                 <input type="button" value="Update Profile Picture" id="GetImage">
             </div>
         </div>
      </div>
</div>

USER.jpg is a dummy image.

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Remove all the content of index.css and add following style

body, html {
    height: 100%;
    background-repeat: no-repeat;
    background-image: linear-gradient(rgb(104, 145, 162), rgb(12, 97, 33));
}
/**
 * Profile image component
 */
.profile-header-container {
    margin: 0 auto;
    text-align: center;
}

.profile-header-img {
    padding: 54px;
}

    .profile-header-img > img.img-circle {
        width: 120px;
        height: 120px;
        border: 2px solid #51D2B7;
    }

.profile-header {
    margin-top: 43px;
}

/**
 * Ranking component
 */
.rank-label-container {
    margin-top: -19px;
    /* z-index: 1000; */
    text-align: center;
}

.label.label-default.rank-label {
    background-color: rgb(81, 210, 183);
    padding: 5px 10px 5px 10px;
    border-radius: 27px;
}

final Index.htm willl look like:

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Security-Policy" content="default-src ‘self‘ data: gap: https://ssl.gstatic.com ‘unsafe-eval‘; style-src ‘self‘ ‘unsafe-inline‘; media-src *">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <meta name="format-detection" content="telephone=no">
    <meta name="msapplication-tap-highlight" content="no">
    <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width">
    <link rel="stylesheet" type="text/css" href="css/index.css">
    <title>ImageUploadCordova</title>
</head>
<body>
    <div class="row">
        <div class="profile-header-container">
            <div class="profile-header-img">
                <div id="image">
                    <img class=‘img-circle‘ width=‘120‘ height=‘120‘ src=‘images/USER.jpg‘ />
                </div>
                <div class="rank-label-container">
                    <input type="button" value="Update Profile Picture" id="GetImage">
                </div>
            </div>
        </div>
    </div>
    <script type="text/javascript" src="cordova.js"></script>
    <script type="text/javascript" src="scripts/platformOverrides.js"></script>
    <script type="text/javascript" src="scripts/index.js"></script>
</body>
</html>

final Index.js look like:

(function () {
    "use strict";
    document.addEventListener( ‘deviceready‘, onDeviceReady.bind( this ), false );
    function onDeviceReady() {
        document.getElementById("GetImage").addEventListener("click", GetImage);
    };    
})();
function GetImage() {
    navigator.camera.getPicture(function (imageUri) {
        var CapturePhoto = document.getElementById("image");
        alert("Photo Captured");
        CapturePhoto.innerHTML = "<img class=‘img-circle‘ width=‘120‘ height=‘120‘ src=‘" + imageUri + "‘ />‘";
        uploadPhoto(imageUri);
    }, null, null);
  
}
function uploadPhoto(imageURI) {
    var options = new FileUploadOptions();
    options.fileKey = "files";
    options.fileName = imageURI.substr(imageURI.lastIndexOf(‘/‘) + 1);
    options.mimeType = "image/jpeg";
    console.log(options.fileName);
    var ft = new FileTransfer();
    ft.upload(imageURI, "http://192.168.1.66:8084/api/image", function (result) {
        console.log(JSON.stringify(result));
        alert(JSON.stringify(result));
    }, function (error) {
        console.log(JSON.stringify(error));
        alert(JSON.stringify(result));
    }, options);
}

In Index.js, you can see two methods firstly, GetImage for capturing image from Camera and secondly, UploadImage for uploading image to our web api. http://192.168.1.66:8084 is my local IIS server address.

Output:

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