c# - 从单选按钮数据源选项中检索电子邮件地址

Question

我有单选按钮，我可以从中选择数据源的类型来检索收件人的电子邮件地址。

  if (RadioButton1.Checked)
{
    sql.Open();
    string s = "select * from address";
    SqlCommand t = new SqlCommand(s, sql);
    t.ExecuteNonQuery();
    sql.Close();

    SqlCommand cmd = new SqlCommand();
    cmd.CommandType = CommandType.Text;
    cmd.CommandText = "SELECT address FROM address1";
    cmd.Connection = sql;
    DataTable dt = new DataTable();
    SqlDataAdapter da = new SqlDataAdapter(cmd);
    sql.Open();
    da.Fill(dt);
    sql.Close();

    foreach (DataRow row in dt.Rows)
    {
        Msg.To.Add(row["address"].ToString());
    }
}
else if (RadioButton2.Checked)
{
    string connectionString = "";
    if (FileUpload1.HasFile)
    {
        string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
        string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName);
        string fileLocation = Server.MapPath("~/App_Data/" + fileName);
        FileUpload1.SaveAs(fileLocation);

        if (fileExtension == ".xls")
        {
            connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
        }
        else if (fileExtension == ".xlsx")
        {
            connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
        }
        OleDbConnection con = new OleDbConnection(connectionString);
        OleDbCommand cmd = new OleDbCommand();
        cmd.CommandType = System.Data.CommandType.Text;
        cmd.Connection = con;
        OleDbDataAdapter dAdapter = new OleDbDataAdapter(cmd);
        DataTable dt = new DataTable();
        con.Open();
        DataTable dtExcelSheetName = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
        string getExcelSheetName = dtExcelSheetName.Rows[0]["Table_Name"].ToString();
        cmd.CommandText = "SELECT address FROM [" + getExcelSheetName + "]";
        dAdapter.SelectCommand = cmd;
        dAdapter.Fill(dt);
        con.Close();


        foreach (DataRow row in dt.Rows)
        {
            Msg.To.Add(row["address"].ToString());
        }
    }
}
else if (RadioButton3.Checked)
{
    if (FileUpload2.HasFile)
    {
        string fileName = Path.GetFileName(FileUpload2.PostedFile.FileName);

        string fileLocation = Server.MapPath("~/App_Data/" + fileName);
        FileUpload2.SaveAs(fileLocation);
        StreamReader sr = new StreamReader(fileLocation);
        String line = sr.ReadToEnd();
        string[] toAddressArray;
        toAddressArray = line.Split(new char[] { ' ' });
        foreach (string a in toAddressArray)
        {
            Msg.To.Add(a);
        }
    }
}

现在，我想要的是当收件人单击我作为邮件正文发送的 html 页面中的链接时，我想从三个单选按钮数据源选项之一中检索收件人的邮件 ID。如何获取邮件ID？
这是完整的代码：

SqlConnection sql = new SqlConnection(ConfigurationManager.ConnectionStrings["mystring"].ConnectionString);

protected void Page_Load(object sender, EventArgs e)
{
    getFiles();
    if (!IsPostBack)
    {
        var list = getFiles();
        dd1.DataSource = list;
        dd1.DataTextField = "Key";
        dd1.DataValueField = "Value";
        dd1.DataBind();
    }
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
    {
        SendHTMLMail();
    }

    void SendHTMLMail()
    {


        StreamReader reader = new StreamReader(dd1.SelectedItem.Value);
        string readFile = reader.ReadToEnd();
        Regex regx = new Regex("(?<!src=\")http(s)?://([\\w+?\\.\\w+])+([a-zA-Z0-9\\~\\!\\@\\#\\$\\%\\^\\&amp;\\*\\(\\)_\\-\\=\\+\\\\\\/\\?\\.\\:\\;\\'\\,]*([a-zA-Z0-9\\?\\#\\=\\/]){1})?", RegexOptions.IgnoreCase);
        string output = regx.ToString();
        string count = 0.ToString();
        output = readFile;
        string username = Server.UrlEncode(this.txtUsername.Text);
        output = regx.Replace(output, new MatchEvaluator((match) =>
        {
            var url = Uri.EscapeDataString(match.Value.ToString());
            return $"http://localhost:61187/two?sender={username}&link={url}&count={count}";
        }));


        MailMessage Msg = new MailMessage();

        Msg.From = new MailAddress(txtUsername.Text);


        Msg.Subject = txtSubject.Text;
        Msg.Body = output.ToString();
        Msg.IsBodyHtml = true;

        if (fuAttachment.HasFile)
        {
            string FileName = Path.GetFileName(fuAttachment.PostedFile.FileName);
            Msg.Attachments.Add(new Attachment(fuAttachment.PostedFile.InputStream, FileName));
        }
        if (RadioButton1.Checked)
        {
            sql.Open();
            string s = "select * from address";
            SqlCommand t = new SqlCommand(s, sql);
            t.ExecuteNonQuery();
            sql.Close();

            SqlCommand cmd = new SqlCommand();
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = "SELECT address FROM address1";
            cmd.Connection = sql;
            DataTable dt = new DataTable();
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            sql.Open();
            da.Fill(dt);
            sql.Close();

            foreach (DataRow row in dt.Rows)
            {
                Msg.To.Add(row["address"].ToString());
            }
        }
        else if (RadioButton2.Checked)
        {
            string connectionString = "";
            if (FileUpload1.HasFile)
            {
                string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
                string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName);
                string fileLocation = Server.MapPath("~/App_Data/" + fileName);
                FileUpload1.SaveAs(fileLocation);

                if (fileExtension == ".xls")
                {
                    connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
                }
                else if (fileExtension == ".xlsx")
                {
                    connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
                }
                OleDbConnection con = new OleDbConnection(connectionString);
                OleDbCommand cmd = new OleDbCommand();
                cmd.CommandType = System.Data.CommandType.Text;
                cmd.Connection = con;
                OleDbDataAdapter dAdapter = new OleDbDataAdapter(cmd);
                DataTable dt = new DataTable();
                con.Open();
                DataTable dtExcelSheetName = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
                string getExcelSheetName = dtExcelSheetName.Rows[0]["Table_Name"].ToString();
                cmd.CommandText = "SELECT address FROM [" + getExcelSheetName + "]";
                dAdapter.SelectCommand = cmd;
                dAdapter.Fill(dt);
                con.Close();


                foreach (DataRow row in dt.Rows)
                {
                    Msg.To.Add(row["address"].ToString());
                }
            }
        }
        else if (RadioButton3.Checked)
        {
            if (FileUpload2.HasFile)
            {
                string fileName = Path.GetFileName(FileUpload2.PostedFile.FileName);

                string fileLocation = Server.MapPath("~/App_Data/" + fileName);
                FileUpload2.SaveAs(fileLocation);
                StreamReader sr = new StreamReader(fileLocation);
                String line = sr.ReadToEnd();
                string[] toAddressArray;
                toAddressArray = line.Split(new char[] { ' ' });
                foreach (string a in toAddressArray)
                {
                    Msg.To.Add(a);
                }
            }
        }

        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.Port = 587;
        smtp.UseDefaultCredentials = false;
        smtp.Credentials = new System.Net.NetworkCredential(txtUsername.Text, txtpwd.Text);
        smtp.EnableSsl = true;
        smtp.Send(Msg);
        Msg = null;
        ClientScript.RegisterStartupScript(GetType(), "alert", "alert('Email sent.');", true);
    }
}

public List<KeyValuePair<string, string>> getFiles()
{
    DirectoryInfo di = new DirectoryInfo(HostingEnvironment.MapPath("/App_Data"));
    var fi = di.EnumerateFiles("*.html", SearchOption.TopDirectoryOnly);
    var files = new List<KeyValuePair<string, string>>();
    foreach (FileInfo file in fi)
    {
        files.Add(new KeyValuePair<string, string>(file.Name, file.FullName));
    }
    return files;
}

标签： c#.netsmtpradio-buttondatasource