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C# で MSG コマンドを実行する

Last updated at Posted at 2017-06-11

C# で MSG コマンドを実行するサンプルコードです。
数時間はまったのでメモっておきます。

ポイントは ProcessStartInfo.FileName に指定する値。

それから、MSGコマンドはエラーがあるとStandardErrorにエラーメッセージを出力するので、それをチェックするようにしています。

public void SendMessage(string account, string computer, string message)
{
    var startInfo = new ProcessStartInfo
    {
        FileName = @"C:\windows\sysnative\msg.exe",
        Arguments = string.Format("{0} /SERVER:{1} \"{2}\"", account, computer, message),
        RedirectStandardError = true,
        CreateNoWindow = true,
        UseShellExecute = false,
    };
    var p = Process.Start(startInfo);
    var errorMessage = p.StandardError.ReadToEnd();
    p.WaitForExit();
    p.Close();

    if (errorMessage.Length > 0)
    {
        // エラー発生時の処理
    }
}
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