C# 如何在asp.net中从web表单的URL获取参数值？

我有一个问题，如何获得确切的个人id与电子邮件地址做重置密码。因此，从这里我将通过电子邮件向用户发送超链接

            SmtpClient client = new SmtpClient();

            try
            {
                SendPasswordResetEmail(u.EmailAddress.ToString(),u.Name.ToString(),UniqueID);
                lblMessage.ForeColor = System.Drawing.Color.LimeGreen;
                lblMessage.Text = "Email has been successfully sent!";
            }
            catch (Exception exc)
            {
                lblMessage.ForeColor = System.Drawing.Color.Red;
                lblMessage.Text = "ERROR: " + exc.Message;
            }

然后这是我给用户的消息内容，以便让他们点击进入超链接

        string emailAddress = txtEmail.Text;

        User u=db.Users.Single(x => 
                            x.EmailAddress == emailAddress);

        MailMessage mailMessage = new MailMessage(u.EmailAddress, ToEmail);
        StringBuilder sbEmailBody = new StringBuilder();
        sbEmailBody.Append("Dear " + u.Name.ToString() + ",<br/><br/>");
        sbEmailBody.Append("Please click on the following link to reset your password");
        sbEmailBody.Append("<br/>"); sbEmailBody.Append("https://localhost:44305/Registration/ChangePwd.aspx?uid=" + u.Id);
        sbEmailBody.Append("<br/><br/>");
        sbEmailBody.Append("<b>吹水站</b>");

        mailMessage.IsBodyHtml = true;

        mailMessage.Body = sbEmailBody.ToString();
        mailMessage.Subject = "Reset Your Password";
        SmtpClient smtpClient = new SmtpClient("smtp.gmail.com", 587);

        MailMessage msg = new MailMessage();

        msg.To.Add(new MailAddress(txtEmail.Text));
        smtpClient.EnableSsl = true;
        smtpClient.Send(mailMessage);

string emailAddress=txtEmail.Text；
用户u=db.Users.Single（x=>
x、 EmailAddress==电子邮件地址）；
MailMessage MailMessage=新邮件（u.EmailAddress，ToEmail）；
StringBuilder sbEmailBody=新的StringBuilder（）；
sbEmailBody.Append（“亲爱的”+u.Name.ToString（）+”，

）；
sbEmailBody.Append（“请单击以下链接重置密码”）；
sbEmailBody.Append（“
”）；sbEmailBody.Append（“https://localhost:44305/Registration/ChangePwd.aspx?uid=“+u.Id）；
sbEmailBody.Append（“

”）；
sbEmailBody.Append（“吹水站");
mailMessage.IsBodyHtml=true；
mailMessage.Body=sbEmailBody.ToString（）；
mailMessage.Subject=“重置密码”；
SmtpClient SmtpClient=新的SmtpClient（“smtp.gmail.com”，587）；
MailMessage msg=新的MailMessage（）；
msg.To.Add（新邮件地址（txtEmail.Text））；
smtpClient.EnableSsl=true；
smtpClient.Send（mailMessage）；

那么这就是我的ChangePwd.aspx？uid=pages

<form id="form1" runat="server">
    <div>
        <h1>Change password</h1>
    </div>
    <div>
        <asp:Literal ID="litEmailAddress" runat="server"></asp:Literal>
    </div>
    <div>
        <p>Enter new password : 
        <asp:TextBox ID="txtNewPwd" runat="server" TextMode="Password"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Please fill in the blank" ControlToValidate="txtNewPwd" CssClass="error" Display="Dynamic"></asp:RequiredFieldValidator>
            <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtNewPwd" CssClass="error" ErrorMessage="Password must be between 8-16 characters including at least 1 letter and 1 number" ValidationExpression="((?=.*\d)(?=.*[a-z]).{8,16})"></asp:RegularExpressionValidator>
        </p>
    </div>
    <div>
        Re-enter new password:
        <asp:TextBox ID="txtRepeatPwd" runat="server" TextMode="Password"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="Please fill in the blank" ControlToValidate="txtRepeatPwd" CssClass="error" Display="Dynamic"></asp:RequiredFieldValidator>
        <asp:CompareValidator ID="CompareValidator1" runat="server" ControlToCompare="txtNewPwd" ControlToValidate="txtRepeatPwd" CssClass="error" ErrorMessage="Password and repeat password are not matched"></asp:CompareValidator>
    </div>
    <p>
    <asp:Button ID="btnCancel" runat="server" Text="Cancel" CausesValidation="False" PostBackUrl="~/Registration/Login.aspx" /><asp:Button ID="btnConfirm" runat="server" Text="Confirm" OnClick="btnConfirm_Click" />
    </p>
    <div>
    <p><asp:Label ID="lblSuccess" runat="server" Text=""></asp:Label></p>
    <asp:Label ID="lblFailed" runat="server" Text=""></asp:Label>
    </div>

</form>

更改密码
输入新密码：

重新输入新密码：

---

从这里开始，我不知道当他们单击ChangePwd.aspx的超链接进行重置时，如何获得准确的用户电子邮件地址。然后，我必须更新数据库以存储用户更新后的密码。我尝试在线搜索，但缺乏从internet获得的资源。任何人请帮助，谢谢。

您应该是一名可以使用

Request.QueryString

属性访问URL中指定的

uid

（即

Request.QueryString[“uid”]

）的值。然后可以直接获取具有

Id

的

User

对象并获取用户的电子邮件地址

---

这里是一个基本教程：

加载ChangePwd.aspx页面时，您需要唯一地标识用户，以便将新密码保存到该特定用户。这里您需要的是传递主id（用户id或电子邮件地址）从您的电子邮件发送到ChangePwd.aspx页面。通过将ID传递到URL查询字符串，您正在正确执行此操作

https://localhost:44305/Registration/ChangePwd.aspx?uid=" + u.Id);

现在，您需要在ChangePwd.aspx.cs（WebForm的服务器端类）中阅读这些内容

protected void Page_Load(object sender, EventArgs e)
{
   string userId= Request.QueryString["uid"];
   // get the user *User* from the database, using the above retrieved ID

   litEmailAddress.text = User.email; // something like this
}

现在，您可以将新密码保存到此用户。如果这有帮助或需要更多帮助，请告诉我