Hi rani,
Using the below article i have created the example.
Check this example. Now please take its reference and correct your code.
Database
I have made use of the following table tblFilesPath with the schema as follows.

I have already inserted few records in the table.

Namespaces
using System.Collections.Generic;
using System.Configuration;
using System.Data.SqlClient;
using System.IO;
Controller
public class HomeController : Controller
{
    // GET: /Home/
    public ActionResult Index()
    {
        return View();
    }
    public JsonResult GetFiles()
    {
        List<object> files = new List<object>();
        string sql = "SELECT Id,Name,Path FROM tblFilesPath";
        using (SqlConnection conn = new SqlConnection())
        {
            conn.ConnectionString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
            using (SqlCommand cmd = new SqlCommand(sql))
            {
                cmd.Connection = conn;
                conn.Open();
                using (SqlDataReader sdr = cmd.ExecuteReader())
                {
                    while (sdr.Read())
                    {
                        files.Add(new
                        {
                            Id = sdr["Id"],
                            Name = sdr["Name"],
                            Path = sdr["Path"]
                        });
                    }
                }
                conn.Close();
            }
            return Json(files, JsonRequestBehavior.AllowGet);
        }
    }
    public JsonResult Update()
    {
        HttpPostedFileBase postedFile = Request.Files[0];
        postedFile.SaveAs(Server.MapPath("~/Images/") + Path.GetFileName(postedFile.FileName));
        int id = Convert.ToInt32(Request.Form["Id"]);
        string name = Request.Form["ImageName"];
        string query = "UPDATE tblFilesPath SET Name=@Name, Path=@Path WHERE Id=@Id";
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@Id", id);
                cmd.Parameters.AddWithValue("@Name", name);
                cmd.Parameters.AddWithValue("@Path", "Images/" + Path.GetFileName(postedFile.FileName));
                cmd.Connection = con;
                con.Open();
                cmd.ExecuteNonQuery();
                con.Close();
            }
        }
        return Json("");
    }
}
View
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>DataTable AngularJS</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />
    <link rel="stylesheet" href="https://cdn.datatables.net/1.10.12/css/dataTables.bootstrap.min.css" />
    <script type="text/javascript" src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
    <script type="text/javascript" src="https://cdn.datatables.net/1.10.12/js/jquery.dataTables.min.js"></script>
    <script type="text/javascript" src="https://cdn.datatables.net/1.10.12/js/dataTables.bootstrap.min.js"></script>
    <script type="text/javascript" src="https://code.angularjs.org/1.3.0/angular.js"></script>
    <script type="text/javascript" src="https://rawgithub.com/vivendi/angular-datatables/master/src/angular-datatables.js"></script>
    <script type="text/javascript" src="https://rawgithub.com/vivendi/angular-datatables/master/src/angular-datatables.directive.js"></script>
    <script type="text/javascript" src="https://rawgithub.com/vivendi/angular-datatables/master/src/angular-datatables.factory.js"></script>
    <script type="text/javascript" src="https://rawgithub.com/vivendi/angular-datatables/master/src/angular-datatables.bootstrap.js"></script>
    <script type="text/javascript">
        var app = angular.module('MyApp', ['datatables'])
        app.controller('MyController', function ($scope, $http, $timeout) {
            PopulateFiles();
            function PopulateFiles() {
                $http.post("Home/GetFiles", { headers: { 'Content-Type': 'application/json'} })
                .then(function (response) {
                    $scope.Files = response.data;
                }, function (response) {
                    $window.alert(response.responseText);
                });
            }
            $scope.ShowHide = false;
            $scope.EditData = function (file) {
                $scope.Id = file.Id;
                $scope.Name = file.Name;
                $scope.ShowHide = true;
            };
            $scope.Upload = function () {
                var formData = new FormData();
                formData.append("Id", $scope.Id);
                formData.append("ImageName", $scope.Name);
                formData.append(file, document.getElementById("file").files[0]);
                $http({
                    method: "POST",
                    url: "Home/Update",
                    data: formData,
                    transformRequest: angular.identity,
                    headers: { 'Content-Type': undefined }
                }).success(function (data, status) {
                    $timeout(function () {
                        PopulateFiles();
                        $scope.ShowHide = false;
                    });
                }).error(function (data, status) {
                    $window.alert(data.Message);
                });
            };
        });
    </script>
</head>
<body>
    <div ng-app="MyApp" ng-controller="MyController">
        <table ng-show="ShowHide" class="table table-bordered table-responsive">
            <tr>
                <td>Id</td>
                <td><input type="text" readonly="readonly" ng-model="Id" /></td>
            </tr>
            <tr>
                <td>Name</td>
                <td><input type="text" ng-model="Name" /></td>
            </tr>
            <tr>
                <td colspan="2" align="center">
                    <input type="file" id="file" />
                </td>
            </tr>
            <tr>
                <td colspan="2" align="center">
                    <input type="button" value="Update" ng-click="Upload()" />
                </td>
            </tr>
        </table>
        <br />
        <div class="table table-bordered">
            <table datatable="ng" class="table table-bordered table-responsive">
                <thead>
                    <tr>
                        <th>Id</th>
                        <th>Name</th>
                        <th>Image</th>
                        <th>Edit</th>
                    </tr>
                </thead>
                <tbody>
                    <tr dt-rows ng-repeat="file in Files">
                        <td>{{file.Id}}</td>
                        <td>{{file.Name}}</td>
                        <td><img ng-src="{{file.Path}}" alt="{{file.Name}}.jpg" style="height: 100px; width: 100px" /></td>
                        <td><input type="button" id="btnEdit" class="btn btn-primary" value="Edit" ng-click="EditData(file)" /></td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
</body>
</html>
Screenshot
