.netの最近の情報

著者：丸岡 孝司 

発行日：２００７年７月２５日

発行者：黒田 康夫

発行所：株式会社ラトルズ

411ページ

2,600円＋税

開発の現場から生まれた実践テクニック＆TIPS集。

"Visual　C#　プログラミング"という大海原をひとりゆくプログラマのために。

• Chapter1　.NET FrameworkとC#プログラミング
  Visual Studioの使い方、C#コーディング方法、C#のデータ型、制御構造
  などの言語仕様に関するテクニックやTIPSを収録。
  
  
• Chapter2　Windowsアプリケーション
  Windowsフォームやコントロールを使用した、Windowsアプリケーション
  作成のテクニックやTIPSを収録。
  
  
• Chapter3　データベース処理
  .NET　Frameworkにおけるデータベース処理に関するテクニックやTIPS
  を収録。
  
  
• Chapter4　Webとネットワーク
  .NET　Frameworkにおけるネットワーク処理について簡単に紹介。
  

using (SqlTransaction tran = con.Begin.Transaction())

{

    try {

        //SQLによるデータベース更新処理

        :

        //コミット

        tran.Commit();

    }

    catch {

        //ロールバック

        tran.Rollback();

    }

}

using (TransactionScope tran = new TransactionScope()) {

    //SQLによるデータベース更新処理

    :

    //コミット

    tran.Complete();

}

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Net;
using System.IO;
using Newtonsoft.Json;

namespace TwitterApplication
{
    public partial class TwitterForm : Form
    {
        public TwitterForm()
        {
            InitializeComponent();
            lstItems.Items.Clear();
        }

        private String GetTweet(String URL)
        {
            //Request
            HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(URL);
            Request.Method = "GET";
            WebResponse Response = Request.GetResponse();
           
            //Read
            StreamReader Readar = new StreamReader(Response.GetResponseStream());
            String Results = Readar.ReadToEnd();

            //Return
            Readar.Close();
            Response.Close();
            return Results;
        }

        private void btnTimeLine_Click(object sender, EventArgs e)
        {
            String URL = "http://twitter.com/statuses/user_timeline/" + txtUser.Text + ".json?count=50";
            String JSON = GetTweet(URL);
            List<Status> StatusList = (List<Status>)JsonConvert.DeserializeObject(JSON, typeof(List<Status>));
           
            lstItems.Items.Clear();
            lstItems.HorizontalScrollbar = false;
            foreach (Status StatusObject in StatusList)
            {
                lstItems.Items.Add(StatusObject.Text);
            }
            //ScrollBarSetting
            lstItems.HorizontalScrollbar = true;
        }
    }
}

namespace TwitterApplication
{
    public sealed class Status
    {
        public string In_reply_to_status_id { get; set; }

        public bool Favorited { get; set; }

        public string In_reply_to_user_id { get; set; }

        public string Source { get; set; }

        public string Created_at { get; set; }

        public string In_reply_to_screen_name { get; set; }

        public User User { get; set; }

        public string Id { get; set; }

        public bool Truncated { get; set; }

        public string Text { get; set; }
    }

    public sealed class User
    {
        public string Profile_sidebar_border_color { get; set; }

        public string Description { get; set; }

        public string Url { get; set; }

        public string Screen_name { get; set; }

        public string Following { get; set; }
           
        public bool Verified { get; set; }

        public string Profile_text_color { get; set; }

        public int Followers_count { get; set; }

        public string Profile_background_image_url { get; set; }

        public string Created_at { get; set; }
       
        public string Notifications { get; set; }

        public int Friends_count { get; set; }

        public string Profile_link_color { get; set; }

        public bool Profile_background_tile { get; set; }
       
        public int Favourites_count { get; set; }

        public string Profile_background_color { get; set; }

        public bool Protected { get; set; }

        public string Time_zone { get; set; }
       
        public string Location { get; set; }

        public string Name { get; set; }

        public string Profile_sidebar_fill_color { get; set; }
       
        public string Id { get; set; }

        public int Statuses_count { get; set; }
       
        public int Utc_offset { get; set; }

        public string Profile_image_url { get; set; }
    }
}

using System;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Xml;

namespace TwitterApplication
{
    public partial class TwitterForm : Form
    {
        public TwitterForm()
        {
            InitializeComponent();
            lstItems.Items.Clear();
        }

        private String GetTweet(String URL)
        {
            //Request
            HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(URL);
            Request.Method = "GET";
            WebResponse Response = Request.GetResponse();
           
            //Read
            StreamReader Readar = new StreamReader(Response.GetResponseStream());
            String Results = Readar.ReadToEnd();

            //Return
            Readar.Close();
            Response.Close();
            return Results;
        }

        private void btnTimeLine_Click(object sender, EventArgs e)
        {
            String URL = "http://twitter.com/statuses/user_timeline/" + txtUser.Text + ".xml?count=50";
            String XML = GetTweet(URL);
            XmlDocument Doc = new XmlDocument();
            Doc.LoadXml(XML);
            XmlNodeList XMLNodes = Doc.SelectNodes("//statuses/status/text");

            lstItems.Items.Clear();
            lstItems.HorizontalScrollbar = false;
            foreach (XmlNode Node in XMLNodes)
            {
                lstItems.Items.Add(Node.InnerText);
            }
            //ScrollBarSetting
            lstItems.HorizontalScrollbar = true;
        }

        private void TwitterForm_Load(object sender, EventArgs e)
        {

        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace JanCodeMaker
{
    public partial class frmJan : Form
    {
        public frmJan()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            cmbCountry.SelectedIndex = 1;
            txtMaker.Text = "";
            txtSyohin.Text = "";
            txtJan13.Text = "";
        }

        private void frmJan_Shown(object sender, EventArgs e)
        {
            txtMaker.Focus();

        }

        private void frmJan_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter) {
                bool forward = e.Modifiers != Keys.Shift;
                this.SelectNextControl(this.ActiveControl, forward, true, true, true);
                e.Handled = true;
            }

        }

        //チェックディジットを計算する
        private void btnMake_Click(object sender, EventArgs e)
        {
            string source = cmbCountry.Text + txtMaker.Text + txtSyohin.Text;
            if (source.Length != 12) {
                MessageBox.Show("12桁で入力してください。");
            }

            int chk1 = 3 * (Int16.Parse(source.Substring( 1, 1)) +
                            Int16.Parse(source.Substring( 3, 1)) +
                            Int16.Parse(source.Substring( 5, 1)) +
                            Int16.Parse(source.Substring( 7, 1)) +
                            Int16.Parse(source.Substring( 9, 1)) +
                            Int16.Parse(source.Substring(11, 1)));
            int chk2 = 1 * (Int16.Parse(source.Substring( 0, 1)) +
                            Int16.Parse(source.Substring( 2, 1)) +
                            Int16.Parse(source.Substring( 4, 1)) +
                            Int16.Parse(source.Substring( 6, 1)) +
                            Int16.Parse(source.Substring( 8, 1)) +
                            Int16.Parse(source.Substring(10, 1)));
            int chk3 = 10 - ((chk1 + chk2) - (((chk1 + chk2) / 10) * 10));
           
            if (chk3 == 10) { chk3 = 0; }
            txtJan13.Text = source + chk3.ToString();
            //MessageBox.Show(chk1.ToString() + "/" + chk2.ToString() + "/" + chk3.ToString());
        }

    }
}