Session问题,我疯了!!
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
namespace StdMis
{
/// <summary>
/// AdmiAlterTchr 的摘要说明。
/// </summary>
public class AdmiAlterTchr : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Reset;
protected System.Web.UI.WebControls.Button Submit;
protected System.Web.UI.WebControls.TextBox IDCard;
protected System.Web.UI.WebControls.Label Label8;
protected System.Web.UI.WebControls.TextBox Email;
protected System.Web.UI.WebControls.Label Label7;
protected System.Web.UI.WebControls.DropDownList Sex;
protected System.Web.UI.WebControls.Label Label6;
protected System.Web.UI.WebControls.Label Labe1;
protected System.Web.UI.WebControls.TextBox SID;
protected System.Web.UI.WebControls.Button ResetPassword;
protected System.Data.OleDb.OleDbConnection conn;
private void Page_Load(object sender, System.EventArgs e)
{
if (!Page.IsPostBack && Request.ServerVariables["REQUEST_METHOD"] == "POST")
{
conn.Open();
Session["ManagedUser"] = Request.Form["UserName"];
string sql = "Select * From [User] where UserName ='" + Request.Form["UserName"] + "'";
OleDbCommand cmd = new OleDbCommand(sql,conn);
OleDbDataReader rd= cmd.ExecuteReader();
Response.Write("123");
conn.Close();
}
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.conn = new System.Data.OleDb.OleDbConnection();
//
// conn
//
this.conn.ConnectionString = @"Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Registry Path=;Jet OLEDB:Database Locking Mode=1;Jet OLEDB:Database Password=;Data Source=""C:\Inetpub\wwwroot\StdMis\mdb.mdb"";Password=;Jet OLEDB:Engine Type=5;Jet OLEDB:Global Bulk Transactions=1;Provider=""Microsoft.Jet.OLEDB.4.0"";Jet OLEDB:System database=;Jet OLEDB:SFP=False;Extended Properties=;Mode=Share Deny None;Jet OLEDB:New Database Password=;Jet OLEDB:Create System Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;User ID=Admin;Jet OLEDB:Encrypt Database=False";
this.ResetPassword.Click += new System.EventHandler(this.ResetPassword_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void ResetPassword_Click(object sender, System.EventArgs e)
{
conn.Open();
string sql = "Update [User] Set [Password] = '111111' where UserName = '" + Session["ManagedUser"].ToString() + "'";
OleDbCommand cmd = new OleDbCommand(sql,conn);
cmd.ExecuteNonQuery();
conn.Close();
Response.Write("密码已重设为111111");
}
}
}
第一次加载页时没问题,可是在点了ResetPassword按钮后执行ResetPassword_Click()会报错:未将对象引用设置到对象的实例
错误在string sql = "Update [User] Set [Password] = '111111' where UserName = '" + Session["ManagedUser"].ToString() + "'";
救救我吧,我都快疯了