我创建了一个电子邮件表单,当用户点击提交时。如果刷新页面,页面将重定向到同一页面以防止重新提交。页面重定向到自身后,标签会显示“谢谢”。问题是,当我刷新页面或转到另一页并返回时,标签仍显示“谢谢”,而不是“”。当我刷新页面或更改页面或更好的解决方案时,有没有办法清除会话[“结果”]?提前谢谢。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Net.Mail;
public partial class Contact : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Session["ClickedLink"] = "Contact";
lblResults.Text = "";
if (!IsPostBack)
{
lblResults.Text = Session["Results"].ToString();
}
}
protected void btnSend_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
string fileName = Server.MapPath("~/App_Data/Contact.txt");
string mailBody = File.ReadAllText(fileName);
mailBody = mailBody.Replace("##Name##", txtName.Text);
mailBody = mailBody.Replace("##Email##", txtEmail.Text);
mailBody = mailBody.Replace("##Message##", txtMessage.Text);
MailMessage myMessage = new MailMessage();
myMessage.Subject = "Response from web site";
myMessage.Body = mailBody;
myMessage.From = new MailAddress("intern2@gmail.com", "Sender Name");
myMessage.To.Add(new MailAddress("intern2@gmail.com", "Receiver Name"));
myMessage.ReplyToList.Add(new MailAddress(txtEmail.Text));
SmtpClient mySmtpClient = new SmtpClient();
mySmtpClient.Send(myMessage);
txtName.Text = "";
txtEmail.Text = "";
txtMessage.Text = "";
}
lblResults.Text = "Thank you";
Session["Results"] = lblResults.Text;
Response.Redirect("Contact.aspx");
}
}
答案 0 :(得分:1)
您可以在重定向的查询字符串中发送消息。
protected void btnSend_Click(object sender, EventArgs e)
{
// ...
Response.Redirect("Contact.aspx?msg=Thanks");
}
和PageLoad
protected void Page_Load(object sender, EventArgs e)
{
Session["ClickedLink"] = "Contact";
lblResults.Text = "";
if (!IsPostBack)
{
if (Request.QueryString["msg"] != null)
lblResults.Text = Request.QueryString["msg"];
}
}
答案 1 :(得分:1)
另一个解决方案是在使用后添加一行来清除会话变量:
protected void Page_Load(object sender, EventArgs e)
{
Session["ClickedLink"] = "Contact";
lblResults.Text = "";
if (!IsPostBack)
{
lblResults.Text = Session["Results"].ToString();
Session["Results"] = null;
}
}
在QueryString中,用户可以手动插入值以在标签中显示。