Student/ModifyPwd.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 Student_ModifyPwd : System.Web.UI.Page
{
    Alert alert = new Alert();
    SqlHelper data = new SqlHelper();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {

        }
    }/// <summary>
    /// 修改密码
    /// </summary>
    private void UPpwd()
    {
        SqlHelper mydata = new SqlHelper();
        string ID = Session["userid"].ToString();
        try
        {
            string sql = "update [Student]  set [mima] ='" + txtpwd2.Text.ToString() + "' where [ID]='" + ID + "' ";
            mydata.RunSql(sql);
            alert.Alertjs("修改成功");
        }
        catch
        {
            alert.Alertjs("修改失败");
        }
    }
    /// <summary>
    /// 检验原来的密码
    /// </summary>
    private void chkpwd()
    {
        SqlDataReader dr;
        dr = data.GetDataReader("select * from  Student  where ID='" + Session["userid"].ToString() + "' and mima='" + txtpwd1.Text + "'");
        if (dr.Read())
        {
            UPpwd();
        }
        else
        {
            alert.Alertjs("原密码不正确");
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (this.txtpwd2.Text != this.txtpwd3.Text)
        {
            alert.Alertjs("两次输入的密码不一致");
        }
        else
        {