動作環境
Windows 8.1 Pro (64bit)
Microsoft Visual Studio 2017 Community
Sublime Text 2
ファイルのコピー方法に関して。
参考
二つ目のFile.Copy()はoverwriteを指定できる。
code
MainWindow.xaml
<Window x:Class="_171115_t0940_filecopy.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:_171115_t0940_filecopy"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Button Name="B_filecopy" Height="30" Content="file copy" Click="B_filecopy_Click"/>
</Grid>
</Window>
MainWindow.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
// 以下を追加
using System.IO;
namespace _171115_t0940_filecopy
{
/// <summary>
/// MainWindow.xaml の相互作用ロジック
/// </summary>
public partial class MainWindow : Window
{
private readonly string kFromFile = "D:\\FileProcess_171115\\171010.csv";
private readonly string kToFile = "D:\\FileProcess_171115\\171015.csv";
public MainWindow()
{
InitializeComponent();
}
private void copyFile_noOverwrite()
{
try
{
File.Copy(kFromFile, kToFile);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString()); // (1)
}
}
private void copyFile_overwrite()
{
try
{
File.Copy(kFromFile, kToFile, overwrite: true);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString()); // (2)
}
}
private void B_filecopy_Click(object sender, RoutedEventArgs e)
{
copyFile_overwrite();
copyFile_noOverwrite();
}
}
}
File.Copy(String, String)実行時にファイルが既存するためにエラーが出る。