DataGridviewの変更を保存します。

Question

私は、ボタンを変更してから同じ変更を行い、更新後に変更する前に同じ値がある場合は、DataGridViewを使用します。

ボタン1 - DataGridViewの ボタン4でレコードを更新することができます - - DataGridViewの ボタン3を更新 - 新しいレコード ボタン2を挿入し、ボタン5 の変更を保存 - キャンセルこれはかなり包括的である

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 
using System.Data.SqlClient; 
using System.Configuration; 

namespace IS 
{ 
public partial class Form2 : Form 
{ 
    public Form2() 
    { 
     InitializeComponent(); 
     LoadTable(); 

     label1.Text = "User: " + User.name + " " + User.surename; 
    } 

    private void label1_Click(object sender, EventArgs e) 
    { 

    } 

    private void LoadTable() 
    { 
     using (SqlConnection connection = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\***\Documents\Visual Studio 2015\Projects\***\Database1.mdf;Integrated Security=True;Connect Timeout=30")) 
     using (SqlCommand query = new SqlCommand("Select FirstName, LastName, Login, Email from Users", connection)) 
     { 
      try 
      { 
       SqlDataAdapter Adapter = new SqlDataAdapter(); 
       Adapter.SelectCommand = query; 

       DataTable UsersTable = new DataTable(); 
       Adapter.Fill(UsersTable); 
       BindingSource UserTableSource = new BindingSource(); 

       UserTableSource.DataSource = UsersTable; 
       dataGridView1.DataSource = UserTableSource; 
       Adapter.Update(UsersTable); 
      } 
      catch(Exception ex) 
      { 
       MessageBox.Show(ex.Message); 
      } 
     } 
    } 
    private void label1_Click_1(object sender, EventArgs e) 
    { 

    } 

    private void UserManageToolStripMenuItem_Click(object sender, EventArgs e) 
    { 
     panel2.Visible = true; 
    } 

    private void button1_Click(object sender, EventArgs e) 
    { 
     Form3 form3 = new Form3(); 
     form3.FormClosing += new FormClosingEventHandler(this.Form3_FormClosing); 
     form3.Show(); 
    } 

    private void button2_Click(object sender, EventArgs e) 
    { 
     LoadTable(); 
    } 

    private void Form3_FormClosing(object sender, FormClosingEventArgs e) 
    { 
     LoadTable(); 
    } 

    private void button3_Click(object sender, EventArgs e) 
    { 
     dataGridView1.ReadOnly = false; 
     button4.Visible = true; 
     button5.Visible = true; 
    } 

    private void button4_Click(object sender, EventArgs e) 
    { 
     try 
     { 
      SqlDataAdapter sda = new SqlDataAdapter(); 
      SqlCommandBuilder scb = new SqlCommandBuilder(); 
      DataTable dt = new DataTable(); 

      scb = new SqlCommandBuilder(sda); 
      sda.Update(dt); 

      dataGridView1.ReadOnly = true; 
      button4.Visible = false; 
      button5.Visible = false; 
     } 
     catch(Exception ex) 
     { 
      MessageBox.Show(ex.Message); 
     } 
    } 

    private void button5_Click(object sender, EventArgs e) 
    { 
     LoadTable(); 
     button4.Visible = false; 
     button5.Visible = false; 
    } 
} 
} 

Answer 1

を変更CRUDを行うスクリプト。

using System; 
using System.Data; 
using System.Windows.Forms; 
using System.Data.SqlClient; 

namespace WindowsFormsApplication1 
{ 
    public partial class Form1 : Form 
    { 
     SqlCommand sCommand; 
     SqlDataAdapter sAdapter; 
     SqlCommandBuilder sBuilder; 
     DataSet sDs; 
     DataTable sTable;   

     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void button1_Click(object sender, EventArgs e) 
     { 
      string connectionString = "Data Source=.;Initial Catalog=pubs;Integrated Security=True"; 
      string sql = "SELECT * FROM Stores"; 
      SqlConnection connection = new SqlConnection(connectionString); 
      connection.Open(); 
      sCommand = new SqlCommand(sql, connection); 
      sAdapter = new SqlDataAdapter(sCommand); 
      sBuilder = new SqlCommandBuilder(sAdapter); 
      sDs = new DataSet(); 
      sAdapter.Fill(sDs, "Stores"); 
      sTable = sDs.Tables["Stores"]; 
      connection.Close(); 
      dataGridView1.DataSource = sDs.Tables["Stores"]; 
      dataGridView1.ReadOnly = true; 
      save_btn.Enabled = false; 
      dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect; 
     } 

     private void new_btn_Click(object sender, EventArgs e) 
     { 
      dataGridView1.ReadOnly = false; 
      save_btn.Enabled = true; 
      new_btn.Enabled = false; 
      delete_btn.Enabled = false; 
     } 

     private void delete_btn_Click(object sender, EventArgs e) 
     { 
      if (MessageBox.Show("Do you want to delete this row ?", "Delete", MessageBoxButtons.YesNo) == DialogResult.Yes) 
      { 
       dataGridView1.Rows.RemoveAt(dataGridView1.SelectedRows[0].Index); 
       sAdapter.Update(sTable); 
      } 
     } 

     private void save_btn_Click(object sender, EventArgs e) 
     { 
      sAdapter.Update(sTable); 
      dataGridView1.ReadOnly = true; 
      save_btn.Enabled = false; 
      new_btn.Enabled = true; 
      delete_btn.Enabled = true; 
     } 
    } 
}