register.aspx.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;

public partial  class register : System.Web.UI.Page
{
    SqlData da = new SqlData();
    private string uid = "";
    protected void Page_Load(object sender, EventArgs e)
    {
        uid = "" + Session["uname"];
        if (!IsPostBack)
            if (uid != "")
            {
                setUserDet();
            }
    }

    private void setUserDet()
    {
        string sql = @"select * from users where username='" + uid + "'";
        SqlDataReader sdr = da.ExecuteRead(sql);
        if (sdr.Read())
        {
            this.txtUserName.Text = "" + sdr["username"];
            this.txtPwd.Text = "" + sdr["userpwd"];
            if ("" + sdr["sex"] == "男")
            {
                this.rBtnM.Checked = true;
            }
            else
            {

                this.rBtnF.Checked = true;
            }
            userpname.Text = "" + sdr["userpname"];
            txtAge.Text = "" + sdr["age"];
            this.txtEmail.Text = "" + sdr["email"];
        }
        sdr.Close();
    }
    protected void btnConfirm_Click(object sender, EventArgs e)
    {
        string sex = "";
        if (this.rBtnM.Checked)
        {
            sex = "男";
        }
        else
        {
            sex = "女";
        }
        int age = 0;
        age = Convert.ToInt32(this.txtAge.Text);
        if (uid == "")
        {