Users.js

Ext.define('MyApp.model.User', {
    extend: 'Ext.data.Model',  
    fields: ['UserId','UserName', 'UserEmail', 'PhoneNumber', 'Address', 'Password']    
});

Ext.define('MyApp.store.Users', {
    extend: 'Ext.data.Store',  
    model: 'MyApp.model.User',
    proxy: {
        type: 'ajax',
        url: '/api/dashboard',
        reader: {
            type: 'json'
        }
    },
    autoLoad: true
});

Ext.define('MyApp.controller.Users', {
    extend: 'Ext.app.Controller',
    refs: [
        {
            ref: 'UserGrid',
            selector: 'UserGrid'
        },
        {
            ref: 'DelUserBtn',
            selector: 'UserGrid button[action=deleteUser]'
        }

    ],

    init: function () {
        this.control({
            'UserGrid': {
                itemdblclick: this.onUserGridItemDblClick,
                selectionchange: this.onUserGridSelectionChange
            },
            'UserGrid button[action=addUser]': {
                click: this.onAddUserClick
            },
            'UserGrid button[action=deleteUser]': {
                click: this.onDelUserClick
            },
            'UserForm button[action=saveUser]': {
                click: this.onSaveUserClick
            }
        });
    },
    onDelUserClick: function (button) {
        var grid = button.up('grid'),
    		selection = grid.getSelectionModel().getSelection();         
        Ext.Array.each(selection, function (model, index) {
            Ext.Ajax.request({
                url: '/api/dashboard/'+ model.data.UserId,
                method: 'DELETE',               
                success: function () {
                    model.destroy();
                },
                failure: function () {

                }
            });
        });    
        grid.store.load();
    },

    onUserGridSelectionChange: function (grid, selected) {
        this.getDelUserBtn().setDisabled(selected.length === 0);
    },

    onUserGridItemDblClick: function (grid, record, item) {
        this.showUserForm(record);
    },

    onAddUserClick: function () {
        var newUser = Ext.create(MyApp.model.User);

        this.showUserForm(newUser);
    },

    showUserForm: function (model) {       
        var userWin = Ext.create('MyApp.view.UserForm'),
    		form = userWin.down('form');

        form.loadRecord(model);
        userWin.show();
    },

    onSaveUserClick: function (button) {
        var self = this;
        var form = button.up('form'),
    		win = form.up('window'),
    		data = form.getValues(),
    		user = form.getRecord();
        Ext.Ajax.request({
            url: '/api/dashboard',
            method: 'POST',            
            jsonData:form.getValues(),
            success: function () {              
                self.getUserGrid().store.load();               
            },
            failure: function() {
                
            }
        });
        //user.set(data);
        //user.save();
        // this.getUserGrid().store.load();
       
        win.destroy();
    }
});

Ext.define('MyApp.view.UserForm', {
    extend: 'Ext.window.Window',
    xtype: 'UserForm',
    modal: true,
    layout: 'fit',
    height: 300,
    width: 400,
    title: 'UserForm',
    items: [
		{
		    xtype: 'form',
		    bodyPadding: 5,
		    items: [
				{
				    xtype: 'fieldset',
				    title: 'User Info',
				    defaults: {
				        xtype: 'textfield',
				        labelWidth: 100,
				        width: 300
				    },
				    items: [
                        { 
                            name: 'UserId',
                            hidden: true
                        },
						{
						    fieldLabel: 'Name',
						    name: 'UserName'
						},
						{
						    fieldLabel: 'Email',
						    name: 'UserEmail'
						},
					    {
					        fieldLabel: 'Phone',
					        name: 'PhoneNumber'
					    },
						{
						    fieldLabel: 'Address',
						    name: 'Address'
						},
					    {
					        fieldLabel: 'Password',
					        name: 'Password'
					    }
				    ]
				}
		    ],
		    buttons: [
				{
				    text: 'Save',
				    action: 'saveUser'
				}
		    ]
		}
    ]
});

Ext.define('MyApp.view.UserGrid', {
    extend: 'Ext.grid.Panel',
    xtype: 'UserGrid',
    title: 'Users',
    store: 'Users',
    multiSelect: true,
    columns: [
        { text: 'Name', dataIndex: 'UserName', flex: 1 },
        { text: 'Email', dataIndex: 'UserEmail', flex: 1 },
        { text: 'Phone', dataIndex: 'PhoneNumber', flex: 1 },
           { text: 'Address', dataIndex: 'Address', flex: 1 },
              { text: 'Password', dataIndex: 'Password', flex: 1 }
    ],
    tbar: [
		{
		    text: 'Add',
		    iconCls: 'add',
		    action: 'addUser'
		},
		{
		    text: 'Delete',
		    iconCls: 'delete',
		    action: 'deleteUser',
		    disabled: true
		}
    ],
    bbar: [{
        xtype: 'pagingtoolbar',
        store: 'Users',
        displayInfo: true
    }],
    height:'auto',
    width: 400,
    renderTo: Ext.getBody()
});

Ext.onReady(function () {
    Ext.get('UserProfile').on('click', function (e, t) {
        if (MyApp.alreadyInitiated) {
            return;
        }
        Ext.application({
            name: 'MyApp',
            height: 900,
            width: '100%',
            controllers: [
                'Users'
            ],
            stores: [
                'Users'
            ],
            launch: function () {
                Ext.create('Ext.panel.Panel', {
                    layout: 'fit',
                    renderTo: 'container-1010-innerCt',
                    items: [
                        {
                            xtype: 'UserGrid'
                        }
                    ]
                });
            }
        });
    });    
});

dashboard.js

Ext.define('PagePanel', {
    extend: 'Ext.panel.Panel',
    height: '100%',  
    renderTo: Ext.getBody(),
    title: 'Dashboard',
    layout: {
        type: 'table',
        columns: 1,
        tableAttrs: {
            style: {
                width: '100%', height: '100%'
            }
        },
        tdAttrs: {
            style: { border: '1px solid black' }
        }
    },
    listeners : {
        afterrender : function(panel) {
            var header = panel.header;
            header.setHeight(51);
        }
    },

    initComponent: function () {
        this.callParent(arguments);       
            this.add({
                xtype: 'container',
                style: { height: '100%' }
            });
       
    }
});

Ext.onReady(function () {
    Ext.create('PagePanel');
});

dashboard.cshtml

@{
    ViewBag.Title = "dashboard";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
<script src="~/App/dashboard.js"></script>
<script src="~/App/Users.js"></script>
<style>
.add{
  background: url('http://www.famfamfam.com/lab/icons/silk/icons/add.png') no-repeat; 
}
.delete{
  background: url('http://www.famfamfam.com/lab/icons/silk/icons/delete.png') no-repeat; 
}
</style>

Api

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;

namespace SenchaApi.Controllers
{
    public class DashboardController : ApiController
    {
        forumEntities db = new forumEntities();
        // GET api/dashboard
        public IEnumerable<UserLogin> Get()
        {
            var result=db.UserLogin.ToList();
            return result;
        }

        // GET api/dashboard/5
        public string Get(int id)
        {
            return "value";
        }

        // POST api/dashboard
        public void Post(UserLogin obj)
        {
            var original = db.UserLogin.Find(obj.UserId);
            if (original != null)
            {
                original.UserName = obj.UserName;
                original.UserEmail = obj.UserEmail;
                original.PhoneNumber = obj.PhoneNumber;
                original.Password = obj.Password;
                original.Address = obj.Address;
            } 
            else
            {
                db.UserLogin.Add(obj);
            }

            db.SaveChanges();
        }

        // PUT api/dashboard/5
        public void Put(int id, [FromBody]string value)
        {
        }

        // DELETE api/dashboard/5
        public void Delete(int id)
        {
            var original = db.UserLogin.Find(id);
            if (original != null)
            {
                db.UserLogin.Remove(original); 
            }            

            db.SaveChanges();
        }
    }
}

DataBase UserLogin Table

      Create Table [UserLogin]
	 (
	  [UserId] int primary key identity(1,1),  
          [UserName] varchar(100), 
          [UserEmail] varchar(100), 
          [PhoneNumber] varchar(100), 
          [Address] varchar(100), 
          [Password] varchar(100) 
	 )

OutPut