D:\vs-code-examples\sample01>code .

namespace jqGrid08.Models
{
    public class User
    {
        public int Id { set; get; }

        public string Name { set; get; }

        public string Email { set; get; }

        public string Password { set; get; }

        public string SiteUrl { set; get; }
    }
}

                colModel: [
                    {
                        name: '@(StronglyTyped.PropertyName<User>(x => x.Name))',
                        index: '@(StronglyTyped.PropertyName<User>(x => x.Name))',
                        align: 'right', width: 150,
                        editable: true, edittype: 'text',
                        editoptions: {
                            maxlength: 40
                        },
                        editrules: {
                            required: true,
                            custom: true,
                            custom_func: function (value, colname) {
                                if (!value)
                                    return [false, "لطفا نامی را وارد کنید"];

                                if (value.length < 3 || value.length > 40)
                                    return [false, colname + " باید بین 3 تا 40 حرف باشد"];
                                else
                                    return [true, ""];
                            }
                        }
                    },
                ],

            $('#list').jqGrid({
                // ...
            }).navGrid(
                '#pager',
                //enabling buttons
                { add: true, del: true, edit: true, search: false },
                //edit option
                {
                    afterSubmit: showServerSideErrors
                },
                //add options
                {
                    afterSubmit: showServerSideErrors
                },
                //delete options
                {
                });
        });

        function showServerSideErrors(response, postdata) {
            var result = $.parseJSON(response.responseText);
            if (result.success === false) {
                //نمایش خطای اعتبار سنجی سمت سرور پس از ویرایش یا افزودن
                //و همچنین جلوگیری از ثبت نهایی فرم
                return [false, result.message, result.id];
            }

            return [true, "", result.id];
        }

        [HttpPost]
        public ActionResult AddUser(User postData)
        {
            //todo: Add user to repository
            if (postData == null)
                return Json(new { success = false, message = "اطلاعات دریافتی خالی است" }, JsonRequestBehavior.AllowGet);

            if (_usersInMemoryDataSource.Any(
                    user => user.Name.Equals(postData.Name, StringComparison.InvariantCultureIgnoreCase)))
            {
                return Json(new { success = false, message = "نام کاربر تکراری است" }, JsonRequestBehavior.AllowGet);
            }

            if (_usersInMemoryDataSource.Any(
                    user => user.Email.Equals(postData.Email, StringComparison.InvariantCultureIgnoreCase)))
            {
                return Json(new { success = false, message = "آدرس ایمیل کاربر تکراری است" }, JsonRequestBehavior.AllowGet);
            }

            postData.Id = _usersInMemoryDataSource.LastOrDefault() == null ? 1 : _usersInMemoryDataSource.Last().Id + 1;
            _usersInMemoryDataSource.Add(postData);

            return Json(new { id = postData.Id, success = true }, JsonRequestBehavior.AllowGet);
        }

                colModel: [
                    {
                        name: '@(StronglyTyped.PropertyName<User>(x => x.Email))',
                        index: '@(StronglyTyped.PropertyName<User>(x => x.Email))',
                        align: 'center', width: 150,
                        editable: true, edittype: 'text',
                        editoptions: {
                            maxlength: 250,
                            dir: 'ltr'
                        },
                        editrules: {
                            required: true,
                            email: true
                        },
                        formatter: 'email'
                    },
                ],

                colModel: [
                    {
                        name: '@(StronglyTyped.PropertyName<User>(x => x.Password))',
                        index: '@(StronglyTyped.PropertyName<User>(x => x.Password))',
                        align: 'center', width: 70,
                        editable: true, edittype: 'password',
                        editoptions: {
                            maxlength: 10,
                            dir: 'ltr'
                        },
                        editrules: {
                            //required: true ---> در این حالت خاص قابل استفاده نیست
                            //در حالت ویرایش رکورد، ورود کلمه عبور اختیاری است
                            //در حالت افزودن رکورد، ورود کلمه عبور اجباری است
                        }
                    },
                ],

            $('#list').jqGrid({
                // ...
            }).navGrid(
                '#pager',
                //enabling buttons
                { add: true, del: true, edit: true, search: false },
                //edit option
                {
                    /*, beforeSubmit: function (posdata, obj) {
                        //در حالت ویرایش رکورد، ورود کلمه عبور اختیاری است
                        return [true, ""];
                    }*/
                },
                //add options
                {
                    beforeSubmit: function (postdata, obj) {
                        //در حالت افزودن رکورد، ورود کلمه عبور اجباری است
                        if (postdata.Password == null || postdata.Password == "" || postdata.Password == undefined)
                            return [false, "لطفا کلمه عبور را وارد کنید"];
                        return [true, ""];
                    }
                },
                //delete options
                {
                });
        });

                colModel: [
                    {
                        name: '@(StronglyTyped.PropertyName<User>(x => x.SiteUrl))',
                        index: '@(StronglyTyped.PropertyName<User>(x => x.SiteUrl))',
                        align: 'center', width: 150,
                        editable: true, edittype: 'text',
                        editoptions: {
                            maxlength: 1000,
                            dir: 'ltr'
                        },
                        editrules: {
                            required: true,
                            url: true
                        },
                        formatter: function (cellvalue, options, rowObject) {
                            return "<a href='" + cellvalue + "' >" + cellvalue + "</a>";
                        },
                        unformat: function (cellvalue, options, cell) {
                            return $('a', cell).attr('href');
                        }
                    },
                ],

<location path="Export">
    <system.web>
      <authorization>
        <deny users="?" />
      </authorization>
    </system.web>
  </location>

public static void RegisterRoutes(RouteCollection routes)
{
   // ...
   routes.RouteExistingFiles = true;
   // ...
}

using System.IO;
using System.Web.Mvc;

namespace Mvc4RouteExistingFiles.Controllers
{
    public class ExportController : Controller
    {
        public ActionResult Index(string id)
        {
            if (string.IsNullOrWhiteSpace(id))
            {
                return Redirect("/");
            }

            var fileName= Path.GetFileName(id);
            var path = Server.MapPath("~/export/"+ fileName);
            return File(path, System.Net.Mime.MediaTypeNames.Application.Octet, fileName);
        }
    }
}

 http://localhost/export/test.pdf

using System.Web.Mvc;
using System.Web.Routing;

namespace Mvc4RouteExistingFiles
{
    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.RouteExistingFiles = true;

            routes.MapRoute(
                name: "ExportRoute",
                url: "Export/{id}",
                defaults: new { controller = "Export", action = "Index", id = UrlParameter.Optional }
            );

            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );
        }
    }
}

routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.IgnoreRoute("content/{*pathInfo}");
routes.IgnoreRoute("scripts/{*pathInfo}");
routes.IgnoreRoute("favicon.ico");
routes.IgnoreRoute("{resource}.ico");
routes.IgnoreRoute("{resource}.png");
routes.IgnoreRoute("{resource}.jpg");
routes.IgnoreRoute("{resource}.gif");
routes.IgnoreRoute("{resource}.txt");

ReactDOM.render(<Counter />, document.getElementById("root"));

import Counters from "./components/counters";

ReactDOM.render(<Counters />, document.getElementById("root"));

import React, { Component } from "react";

import Counter from "./counter";

class Counters extends Component {
  state = {};

  render() {
    return (
      <div>
        <Counter />
        <Counter />
        <Counter />
        <Counter />
      </div>
    );
  }
}

export default Counters;

import React, { Component } from "react";
import Counter from "./counter";

class Counters extends Component {
  state = {
    counters: [
      { id: 1, value: 0 },
      { id: 2, value: 0 },
      { id: 3, value: 0 },
      { id: 4, value: 0 }
    ]
  };

  render() {
    return (
      <div>
        {this.state.counters.map(counter => (
          <Counter key={counter.id} />
        ))}
      </div>
    );
  }
}

export default Counters;

  render() {
    return (
      <div>
        {this.state.counters.map(counter => (
          <Counter key={counter.id} value={counter.value} selected={true} />
        ))}
      </div>
    );

class Counter extends Component {
  state = {
    count: 0
  };

  render() {
    console.log("props", this.props);
    //...

class Counter extends Component {
  state = {
    count: this.props.value
  };

  render() {
    return (
      <div>
        {this.state.counters.map(counter => (
          <Counter key={counter.id} value={counter.value} selected={true}>
            <h4>‍Counter #{counter.id}</h4>
          </Counter>
        ))}
      </div>
    );
  }

class Counter extends Component {
  state = {
    count: this.props.value
  };

  handleDelete = () => {
    console.log("handleDelete called.");
  };

<Counter
     key={counter.id}
     value={counter.value}
     selected={true}
     onDelete={this.handleDelete}
/>

<button
  onClick={this.props.onDelete}
  className="btn btn-danger btn-sm m-2"
>
  Delete
</button>

onClick={() => this.props.onDelete(this.props.id)}

<Counter
  key={counter.id}
  value={counter.value}
  selected={true}
  onDelete={this.handleDelete}
  id={counter.id}
/>

  handleDelete = counterId => {
    console.log("handleDelete called.", counterId);
    const counters = this.state.counters.filter(
      counter => counter.id !== counterId
    );
    this.setState({ counters }); // = this.setState({ counters: counters });
  };

<Counter
  key={counter.id}
  counter={counter}
  onDelete={this.handleDelete}
/>

//debug

/optimize­ 
/debug:full

//=======================

//Release

/optimize+
/debug:pdbonly

if (numberOfCPUs > 1) {
...
}