Android: สร้าง EditText แบบ programmatically

Posted on 22 October, 2018 by jack

คำอธิบายดูที่ Kotlin

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/ll_main_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical">

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="This is a EditText generated from xml" />
    </LinearLayout>

</android.support.constraint.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<LinearLayout

android:id="@+id/ll_main_layout"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:gravity="center"

android:orientation="vertical">

<EditText

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="This is a EditText generated from xml" />

</LinearLayout>

</android.support.constraint.ConstraintLayout>

MainActivity.java

package com.phaisarns.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        EditText editText = new EditText(this);
        // setting layout_width and layout_height using layout parameters
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        editText.setLayoutParams(params);
        editText.setHint("Enter Text");

        // add EditText to LinearLayout
        LinearLayout ll_main_layout = findViewById(R.id.ll_main_layout);
        ll_main_layout.addView(editText);
    }
}

package com.phaisarns.myapplication;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.ViewGroup;

import android.widget.EditText;

import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

EditText editText = new EditText(this);

// setting layout_width and layout_height using layout parameters

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.MATCH_PARENT,

ViewGroup.LayoutParams.WRAP_CONTENT);

editText.setLayoutParams(params);

editText.setHint("Enter Text");

// add EditText to LinearLayout

LinearLayout ll_main_layout = findViewById(R.id.ll_main_layout);

ll_main_layout.addView(editText);

}

Android: กำหนด All Caps ให้ Button

Posted on 22 October, 2018 by jack

คำอธิบายดูที่ Kotlin

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="All Caps - Default Way" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="All Caps Off - XML Way"
        android:textAllCaps="false" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="All Caps On Programmatically" />

    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="All Caps Off Programmatically" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:gravity="center"

android:orientation="vertical"

tools:context=".MainActivity">

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="All Caps - Default Way" />

<Button

android:id="@+id/button2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="All Caps Off - XML Way"

android:textAllCaps="false" />

<Button

android:id="@+id/button3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="All Caps On Programmatically" />

<Button

android:id="@+id/button4"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="All Caps Off Programmatically" />

</LinearLayout>

MainActivity.java

package com.phaisarns.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button  button3 = findViewById(R.id.button3);
        Button  button4 = findViewById(R.id.button4);
        button3.setAllCaps(true);
        button4.setAllCaps(false);
    }
}

package com.phaisarns.myapplication;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.Button;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button button3 = findViewById(R.id.button3);

Button button4 = findViewById(R.id.button4);

button3.setAllCaps(true);

button4.setAllCaps(false);

}

Android: สร้าง Button แบบ programmatically

Posted on 22 October, 2018 by jack

คำอธิบายดูที่ Kotlin

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/ll_main_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical"></LinearLayout>

</android.support.constraint.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<LinearLayout

android:id="@+id/ll_main_layout"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:gravity="center"

android:orientation="vertical"></LinearLayout>

</android.support.constraint.ConstraintLayout>

MainActivity.java

package com.phaisarns.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // creating the button
        Button button = new Button(this);
        // setting layout_width and layout_height using layout parameters
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        button.setLayoutParams(params);
        button.setGravity(Gravity.CENTER_HORIZONTAL);
        button.setTextSize(18);
        button.setText("Dynamic Button");
        // add Button to LinearLayout
        LinearLayout ll_main_layout = findViewById(R.id.ll_main_layout);
        ll_main_layout.addView(button);
    }
}

package com.phaisarns.myapplication;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.Gravity;

import android.widget.Button;

import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// creating the button

Button button = new Button(this);

// setting layout_width and layout_height using layout parameters

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.WRAP_CONTENT,

ViewGroup.LayoutParams.WRAP_CONTENT);

button.setLayoutParams(params);

button.setGravity(Gravity.CENTER_HORIZONTAL);

button.setTextSize(18);

button.setText("Dynamic Button");

// add Button to LinearLayout

LinearLayout ll_main_layout = findViewById(R.id.ll_main_layout);

ll_main_layout.addView(button);

}

Link

How to set a button’s parameters programatically

Android: กำหนดให้ตัวอักษรใน TextView ชิดขอบขวาด้วย setJustificationMode

Posted on 22 October, 2018 by jack

คำอธิบายดูที่ Kotlin

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/ll_main_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tvJustified"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:padding="20sp"
            android:justificationMode="inter_word"
            android:text="The text in this TextView is justified. This feature is introduced in Android version >= 8.0. The text in this TextView is justified." />
        <TextView
            android:id="@+id/tvNotJustified"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:padding="20sp"
            android:text="The text in this TextView is not justified. No justification. The text in this TextView is not justified. No justification. The text in this TextView is not justified. No justification. " />

    </LinearLayout>

</android.support.constraint.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<LinearLayout

android:id="@+id/ll_main_layout"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="vertical">

<TextView

android:id="@+id/tvJustified"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="20sp"

android:padding="20sp"

android:justificationMode="inter_word"

android:text="The text in this TextView is justified. This feature is introduced in Android version >= 8.0. The text in this TextView is justified." />

<TextView

android:id="@+id/tvNotJustified"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="20sp"

android:padding="20sp"

android:text="The text in this TextView is not justified. No justification. The text in this TextView is not justified. No justification. The text in this TextView is not justified. No justification. " />

</LinearLayout>

</android.support.constraint.ConstraintLayout>

MainActivity.java

package com.phaisarns.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.TextView;

import static android.text.Layout.JUSTIFICATION_MODE_INTER_WORD;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // creating TextView programmatically
        TextView textView = new TextView(this);
        textView.setPadding(50, 50, 50, 50);
        textView.setTextSize( 20f);
        textView.setText("This is a dynamic TextView generated programmatically in Kotlin, The text in this TextView is justified. This feature is introduced in Android version >= 8.0. The text in this TextView is justified. This feature is introduced in Android version >= 8.0.The text in this TextView is justified. This feature is introduced in Android version >= 8.0.");
        textView.setJustificationMode(JUSTIFICATION_MODE_INTER_WORD);

        // add TextView to LinearLayout
        LinearLayout ll_main_layout = findViewById(R.id.ll_main_layout);
        ll_main_layout.addView(textView);
    }
}

package com.phaisarns.myapplication;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.LinearLayout;

import android.widget.TextView;

import static android.text.Layout.JUSTIFICATION_MODE_INTER_WORD;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// creating TextView programmatically

TextView textView = new TextView(this);

textView.setPadding(50, 50, 50, 50);

textView.setTextSize( 20f);

textView.setText("This is a dynamic TextView generated programmatically in Kotlin, The text in this TextView is justified. This feature is introduced in Android version >= 8.0. The text in this TextView is justified. This feature is introduced in Android version >= 8.0.The text in this TextView is justified. This feature is introduced in Android version >= 8.0.");

textView.setJustificationMode(JUSTIFICATION_MODE_INTER_WORD);

// add TextView to LinearLayout

LinearLayout ll_main_layout = findViewById(R.id.ll_main_layout);

ll_main_layout.addView(textView);

}

grocery แบบ mvc step#3 Validating JWTs with ASP.NET Core

Posted on 17 October, 2018 by jack

Enabling Users to Sign In

Controllers/AccountController.cs

using grocery.Models;
using JWT;
using JWT.Algorithms;
using JWT.Serializers;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace grocery.Controllers
{
    [Route("api/[controller]")]
    public class AccountController : Controller
    {
        private readonly UserManager<IdentityUser> _userManager;
        private readonly SignInManager<IdentityUser> _signInManager;
        private readonly JWTSettings _options;

        public AccountController(
          UserManager<IdentityUser> userManager,
          SignInManager<IdentityUser> signInManager,
          IOptions<JWTSettings> optionsAccessor)
        {
            _userManager = userManager;
            _signInManager = signInManager;
            _options = optionsAccessor.Value;
        }

        [HttpPost]
        public async Task<IActionResult> Register([FromBody] Credentials Credentials)
        {
            if (ModelState.IsValid)
            {
                var user = new IdentityUser { UserName = Credentials.Email, Email = Credentials.Email };
                var result = await _userManager.CreateAsync(user, Credentials.Password);
                if (result.Succeeded)
                {
                    await _signInManager.SignInAsync(user, isPersistent: false);
                    return new JsonResult(new Dictionary<string, object>
                        {
                            { "access_token", GetAccessToken(Credentials.Email) },
                            { "id_token", GetIdToken(user) }
                        });
                }
                return Errors(result);

            }
            return Error("Unexpected error");
        }

        private string GetIdToken(IdentityUser user)
        {
            var payload = new Dictionary<string, object>
                {
                    { "id", user.Id },
                    { "sub", user.Email },
                    { "email", user.Email },
                    { "emailConfirmed", user.EmailConfirmed },
                };
            return GetToken(payload);
        }

        private string GetAccessToken(string Email)
        {
            var payload = new Dictionary<string, object>
                {
                    { "sub", Email },
                    { "email", Email }
                };
            return GetToken(payload);
        }

        private string GetToken(Dictionary<string, object> payload)
        {
            var secret = _options.SecretKey;

            payload.Add("iss", _options.Issuer);
            payload.Add("aud", _options.Audience);
            payload.Add("nbf", ConvertToUnixTimestamp(DateTime.Now));
            payload.Add("iat", ConvertToUnixTimestamp(DateTime.Now));
            payload.Add("exp", ConvertToUnixTimestamp(DateTime.Now.AddDays(7)));
            IJwtAlgorithm algorithm = new HMACSHA256Algorithm();
            IJsonSerializer serializer = new JsonNetSerializer();
            IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
            IJwtEncoder encoder = new JwtEncoder(algorithm, serializer, urlEncoder);

            return encoder.Encode(payload, secret);
        }

        private JsonResult Errors(IdentityResult result)
        {
            var items = result.Errors
                .Select(x => x.Description)
                .ToArray();
            return new JsonResult(items) { StatusCode = 400 };
        }

        private JsonResult Error(string message)
        {
            return new JsonResult(message) { StatusCode = 400 };
        }

        private static double ConvertToUnixTimestamp(DateTime date)
        {
            DateTime origin = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
            TimeSpan diff = date.ToUniversalTime() - origin;
            return Math.Floor(diff.TotalSeconds);
        }

        [HttpPost("sign-in")]
        public async Task<IActionResult> SignIn([FromBody] Credentials Credentials)
        {
            if (ModelState.IsValid)
            {
                var result = await _signInManager.PasswordSignInAsync(Credentials.Email, Credentials.Password, false, false);
                if (result.Succeeded)
                {
                    var user = await _userManager.FindByEmailAsync(Credentials.Email);
                    return new JsonResult(new Dictionary<string, object>
                        {
                            { "access_token", GetAccessToken(Credentials.Email) },
                            { "id_token", GetIdToken(user) }
                        });
                }
                return new JsonResult("Unable to sign in") { StatusCode = 401 };
            }
            return Error("Unexpected error");
        }
    }
}

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using grocery.Models;

using JWT;

using JWT.Algorithms;

using JWT.Serializers;

using Microsoft.AspNetCore.Identity;

using Microsoft.AspNetCore.Mvc;

using Microsoft.Extensions.Options;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

namespace grocery.Controllers

{

[Route("api/[controller]")]

public class AccountController : Controller

{

private readonly UserManager<IdentityUser> _userManager;

private readonly SignInManager<IdentityUser> _signInManager;

private readonly JWTSettings _options;

public AccountController(

UserManager<IdentityUser> userManager,

SignInManager<IdentityUser> signInManager,

IOptions<JWTSettings> optionsAccessor)

{

_userManager = userManager;

_signInManager = signInManager;

_options = optionsAccessor.Value;

}

[HttpPost]

public async Task<IActionResult> Register([FromBody] Credentials Credentials)

{

if (ModelState.IsValid)

{

var user = new IdentityUser { UserName = Credentials.Email, Email = Credentials.Email };

var result = await _userManager.CreateAsync(user, Credentials.Password);

if (result.Succeeded)

{

await _signInManager.SignInAsync(user, isPersistent: false);

return new JsonResult(new Dictionary<string, object>

{

{ "access_token", GetAccessToken(Credentials.Email) },

{ "id_token", GetIdToken(user) }

});

}

return Errors(result);

}

return Error("Unexpected error");

}

private string GetIdToken(IdentityUser user)

{

var payload = new Dictionary<string, object>

{

{ "id", user.Id },

{ "sub", user.Email },

{ "email", user.Email },

{ "emailConfirmed", user.EmailConfirmed },

};

return GetToken(payload);

}

private string GetAccessToken(string Email)

{

var payload = new Dictionary<string, object>

{

{ "sub", Email },

{ "email", Email }

};

return GetToken(payload);

}

private string GetToken(Dictionary<string, object> payload)

{

var secret = _options.SecretKey;

payload.Add("iss", _options.Issuer);

payload.Add("aud", _options.Audience);

payload.Add("nbf", ConvertToUnixTimestamp(DateTime.Now));

payload.Add("iat", ConvertToUnixTimestamp(DateTime.Now));

payload.Add("exp", ConvertToUnixTimestamp(DateTime.Now.AddDays(7)));

IJwtAlgorithm algorithm = new HMACSHA256Algorithm();

IJsonSerializer serializer = new JsonNetSerializer();

IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();

IJwtEncoder encoder = new JwtEncoder(algorithm, serializer, urlEncoder);

return encoder.Encode(payload, secret);

}

private JsonResult Errors(IdentityResult result)

{

var items = result.Errors

.Select(x => x.Description)

.ToArray();

return new JsonResult(items) { StatusCode = 400 };

}

private JsonResult Error(string message)

{

return new JsonResult(message) { StatusCode = 400 };

}

private static double ConvertToUnixTimestamp(DateTime date)

{

DateTime origin = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);

TimeSpan diff = date.ToUniversalTime() - origin;

return Math.Floor(diff.TotalSeconds);

}

[HttpPost("sign-in")]

public async Task<IActionResult> SignIn([FromBody] Credentials Credentials)

{

if (ModelState.IsValid)

{

var result = await _signInManager.PasswordSignInAsync(Credentials.Email, Credentials.Password, false, false);

if (result.Succeeded)

{

var user = await _userManager.FindByEmailAsync(Credentials.Email);

return new JsonResult(new Dictionary<string, object>

{

{ "access_token", GetAccessToken(Credentials.Email) },

{ "id_token", GetIdToken(user) }

});

}

return new JsonResult("Unable to sign in") { StatusCode = 401 };

}

return Error("Unexpected error");

}

Continue reading →

grocery แบบ mvc step#2 Adding Authentication

Posted on 17 October, 2018 by jack

Adding Authentication to ASP.NET Core

[code]
> dotnet add package JWT
> dotnet add package Microsoft.AspNetCore.Identity.EntityFrameworkCore
> dotnet add package Microsoft.AspNetCore.Authentication.JwtBearer
[/code]

Continue reading →

grocery แบบ mvc step#1 Creating the Grocery List API

Posted on 17 October, 2018 by jack

สร้างโปรเจ็กส์ชื่อ grocery แบบ mvc

[code]
> mkdir grocery
> cd grocery
> dotnet new mvc
[/code]

ทดสอบรัน

[code]
> dotnet run
[/code]

เข้าได้ที่ https://localhost:5001/

Continue reading →

เพิ่มโมเดล Movie ให้กับโปรเจ็กส์ WebMVC

Posted on 17 October, 2018 by jack

สร้างโปรเจ็กส์แบบ WebMVC

สร้างโฟลเดอร์ Data
สร้างโฟลเดอร์ Data\Models
สร้างคลาส Data\Models\Movie.cs

Data\Models\Movie.cs

using System;

namespace WebApp.Data.Models
{
    public class Movie
    {
        public int ID { get; set; }
        public string Title { get; set; }
        public DateTime ReleaseDate { get; set; }
        public string Genre { get; set; }
        public decimal Price { get; set; }
    }
}

using System;

namespace WebApp.Data.Models

{

public class Movie

{

public int ID { get; set; }

public string Title { get; set; }

public DateTime ReleaseDate { get; set; }

public string Genre { get; set; }

public decimal Price { get; set; }

}

Continue reading →

โปรเจ็กส์แบบ WebMVC เพิ่ม View

Posted on 17 October, 2018 by jack

สร้างโปรเจ็กส์แบบ WebMVC

เสร็จแล้วมาเพิ่ม HelloWorldController

แก้ไข HelloWorldController

Controllers/HelloWorldController.cs

using Microsoft.AspNetCore.Mvc;
using System.Text.Encodings.Web;

namespace MvcMovie.Controllers
{
    public class HelloWorldController : Controller
    {
        // 
        // GET: /HelloWorld/
        public IActionResult Index()
        {
            return View();
        }

        // 
        // GET: /HelloWorld/Welcome/ 
        public IActionResult Welcome(string name, int numTimes = 1)
        {
            ViewData["Message"] = "Hello " + name;
            ViewData["NumTimes"] = numTimes;

            return View();
        }
    }
}

using Microsoft.AspNetCore.Mvc;

using System.Text.Encodings.Web;

namespace MvcMovie.Controllers

{

public class HelloWorldController : Controller

{

// GET: /HelloWorld/

public IActionResult Index()

{

return View();

}

// GET: /HelloWorld/Welcome/

public IActionResult Welcome(string name, int numTimes = 1)

{

ViewData["Message"] = "Hello " + name;

ViewData["NumTimes"] = numTimes;

return View();

}

บรรทัดที่ 10,17 : คืนค่าเป็น IActionResult คือคืนค่าเป็นหน้าเว็บตาม Template (คือคู่กับไฟล์ Index.cshtml และ Welcome.cshtml)
บรรทัดที่ 19-20 : กำหนดค่าใน Controller และเรียกใช้ค่านี้ที่ View (เป็นการ Passing Data from the Controller to the View)

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โปรเจ็กส์แบบ WebMVC ให้ Controller รับพารามิเตอร์

Posted on 17 October, 2018 by jack

สร้างโปรเจ็กส์แบบ WebMVC

เสร็จแล้วมาเพิ่ม HelloWorldController

แก้ไข HelloWorldController

Controllers/HelloWorldController.cs

using Microsoft.AspNetCore.Mvc;
using System.Text.Encodings.Web;

namespace MvcMovie.Controllers
{
    public class HelloWorldController : Controller
    {
        // 
        // GET: /HelloWorld/
        public string Index()
        {
            return "This is my default action...";
        }

        // 
        // GET: /HelloWorld/Welcome/ 
        public string Welcome()
        {
            return "This is the Welcome action method...";
        }

        // GET: /HelloWorld/Welcome/ 
        // Requires using System.Text.Encodings.Web;
        public string WelcomeA(string name, int numTimes = 1)
        {
            return HtmlEncoder.Default.Encode($"Hello {name}, NumTimes is: {numTimes}");
        }

        public string WelcomeB(string name, int ID = 1)
        {
            return HtmlEncoder.Default.Encode($"Hello {name}, ID: {ID}");
        }
    }
}

using Microsoft.AspNetCore.Mvc;

using System.Text.Encodings.Web;

namespace MvcMovie.Controllers

{

public class HelloWorldController : Controller

{

// GET: /HelloWorld/

public string Index()

{

return "This is my default action...";

}

// GET: /HelloWorld/Welcome/

public string Welcome()

{

return "This is the Welcome action method...";

}

// GET: /HelloWorld/Welcome/

// Requires using System.Text.Encodings.Web;

public string WelcomeA(string name, int numTimes = 1)

{

return HtmlEncoder.Default.Encode($"Hello {name}, NumTimes is: {numTimes}");

}

public string WelcomeB(string name, int ID = 1)

{

return HtmlEncoder.Default.Encode($"Hello {name}, ID: {ID}");

}

บรรทัดที่ 26,31 ; ใช้ HtmlEncoder.Default.Encode ในการจัดการกับอินพุท เพื่อป้องกันการโจมตีทางอินพุทสตริงที่ส่งมา (malicious input)

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Phaisarn Sutheebanjard

blog.phaisarn.com

Monthly Archives: October 2018

Android: สร้าง EditText แบบ programmatically

Android: กำหนด All Caps ให้ Button

Android: สร้าง Button แบบ programmatically

Android: กำหนดให้ตัวอักษรใน TextView ชิดขอบขวาด้วย setJustificationMode

grocery แบบ mvc step#3 Validating JWTs with ASP.NET Core

grocery แบบ mvc step#2 Adding Authentication

grocery แบบ mvc step#1 Creating the Grocery List API

เพิ่มโมเดล Movie ให้กับโปรเจ็กส์ WebMVC

โปรเจ็กส์แบบ WebMVC เพิ่ม View

โปรเจ็กส์แบบ WebMVC ให้ Controller รับพารามิเตอร์