将信息附加到文本文件

Question

我有一个网站,我将记录添加到数据库和信息我也写入一个日志文件,这是该网站的一部分.信息被写入文件中...我唯一的问题是如何将每个输入的信息添加到数据库中.由于目前信息被放入lof文件中,但每次新插入数据库时​​,日志文件中的现有记录似乎被覆盖并替换为新插入,因此始终只有一条记录被添加到日志文件.建议也许......这是我在btnClick事件中使用的代码.

protected void btnSubmitRating_Click1(object sender, EventArgs e)
{
    int rating = 0;
    try
    {
        if (radRating.Items[0].Selected)
        {
            rating = 1;
        }
        if (radRating.Items[1].Selected)
        {
            rating = 2;
        }
        else if (radRating.Items[2].Selected)
        {
            rating = 3;
        }
        else if (radRating.Items[3].Selected)
        {
            rating = 4;
        }
        else if (radRating.Items[4].Selected)
        {
            rating = 5;
        }
        FileStream rate = new FileStream(Server.MapPath("~/rateBooks.log"), FileMode.Open, FileAccess.ReadWrite);
        BufferedStream bs = new BufferedStream(rate);
        rate.Close();


        StreamWriter sw = new StreamWriter(Server.MapPath("~/rateBooks.log"));
        sw.WriteLine("userName " + txtUserName.Text + " " + "bookTitle " + txtBookTitle.Text + " " + "ISBN " + txtISBN.Text);
        sw.Close();


        Service s = new Service();
        s.bookRatedAdd(txtBookTitle.Text, rating, txtReview.Text, txtISBN.Text, txtUserName.Text);
        btnSubmitRating.Enabled = false;
        radRating.Enabled = false;            
    }
    catch (Exception em)
    {
        lblError.Text = em.Message; 
        //lblError.Text = "This book has already been reviewed by yourself?";
    }
}

亲切的问候

Answer 1

更改整个代码块:

FileStream rate = new FileStream(Server.MapPath("~/rateBooks.log"), FileMode.Open, FileAccess.ReadWrite);
BufferedStream bs = new BufferedStream(rate);
rate.Close();

StreamWriter sw = new StreamWriter(Server.MapPath("~/rateBooks.log"));
sw.WriteLine("userName " + txtUserName.Text + " " + "bookTitle " + txtBookTitle.Text + " " + "ISBN " + txtISBN.Text);
sw.Close();

到这一行:

File.AppendAllText(Server.MapPath("~/rateBooks.log"), "userName " + txtUserName.Text + " " + "bookTitle " + txtBookTitle.Text + " " + "ISBN " + txtISBN.Text + Environment.NewLine);

请注意,我现在手动添加NewLine到每一行.