流写的代码结构

本文关键字：结构 代码 | 更新日期: 2023-09-27 17:56:03

有没有更好的方法来让我流写，而不需要为我按下的每个按钮重复代码？下面是我正在处理的一个例子，其中一个按钮做它自己的事情并相应地写入元音，另一个做同样的事情，除了它相应地写没有字母字符：

        private void btnVowels_Click(object sender, EventArgs e)
        {
            string wholeText = "";
            string copyText = richTextBox1.Text;
            if (System.IO.File.Exists(Second_File) == true)
            {
                System.IO.StreamWriter objWriter;
                objWriter = new System.IO.StreamWriter(Second_File);
                string vowels = "AaEeIiOoUu";
                copyText = new string(copyText.Where(c => !vowels.Contains(c)).ToArray());
                wholeText = richTextBox1.Text + copyText;
                objWriter.Write(wholeText);
                richTextBox2.Text = wholeText;
                objWriter.Close();
            }
            else
            {
                MessageBox.Show("No file named " + Second_File);
            }
        }
private void btnAlpha_Click(object sender, EventArgs e)
        {
            string wholeText = "";
            string copyText = richTextBox1.Text;
            if (System.IO.File.Exists(Second_File) == true)
            {
                System.IO.StreamWriter objWriter;
                objWriter = new System.IO.StreamWriter(Second_File);
                string nonAlpha = @"[^A-Za-z ]+";
                string addSpace = "";
                copyText = Regex.Replace(copyText, nonAlpha, addSpace);
                objWriter.Write(wholeText);
                richTextBox2.Text = wholeText;
                objWriter.Close();
            }
            else
            {
                MessageBox.Show("No file named " + Second_File);
            }
        }

流写的代码结构

您可以使用一个通用函数来处理将内容写入文件并更新第二个文本框：

private void btnAlpha_Click(object sender, EventArgs e)
{
    string nonAlpha = @"[^A-Za-z ]+";
    string addSpace = "";
    string copyText = richTextBox1.Text;
    copyText = Regex.Replace(copyText, nonAlpha, addSpace);
    WriteToFile(Second_File, wholeText);
}
private void btnVowels_Click(object sender, EventArgs e)
{
    string vowels = "AaEeIiOoUu";
    string copyText = richTextBox1.Text;
    copyText = new string(copyText.Where(c => !vowels.Contains(c)).ToArray());
    string wholeText = richTextBox1.Text + copyText;
    WriteToFile(Second_File, wholeText);
}
private void WriteToFile(string filename, string contents)
{
    if (File.Exists(filename))
    {
        File.WriteAllText(filename, contents);
        richTextBox2.Text = wholeText;
    }
    else
    {
        MessageBox.Show("No file named " + filename);
    }
}

为什么不这样做呢？

private void Write(string file, string text)
{
    if (File.Exists(file))
    {
        using (StreamWriter objWriter = new StreamWriter(file))
        {
            objWriter.Write(text);
        }
    }
    else
    {
        MessageBox.Show("No file named " + file);
    }
}
private void btnAlpha_Click(object sender, EventArgs e)
{
    string wholeText = "";
    string copyText = richTextBox1.Text;
    string nonAlpha = @"[^A-Za-z ]+";
    string addSpace = "";
    copyText = Regex.Replace(copyText, nonAlpha, addSpace);
    wholeText = richTextBox1.Text + copyText;
    Write(Second_File, wholeText); // same for the second button
    richTextBox2.Text = wholeText;
}
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