addmanage.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;
using System.Data.SqlClient;
using System.Configuration;

public partial class addmanage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btnCancel_Click(object sender, EventArgs e)
    {
        txtName.Text = txtPwd.Text = txtSPwd.Text = string.Empty;
    }
    protected void btnAdd_Click(object sender, EventArgs e)
    {
        //SqlConnection con = DB.con();
        //SqlCommand cmd = new SqlCommand();
        //cmd.Connection = con;
        //con.Open();
        //cmd.CommandText = "select * from manage where userid='" + txtName.Text + "'";
        //SqlDataReader sqldatareader = cmd.ExecuteReader();
        //if (sqldatareader.Read() == true)
        //{
        //    lbname.Text = "用户名重复！";
        //    con.Close();
        //}
        //else
        //{
        if (lbname.Text != "用户名重复！")
        {
            SqlConnection con = DB.con();
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = con;
            con.Open();
            cmd.CommandText = "insert into manage(userid,pwd) values (@userid,@pwd)";
            cmd.Parameters.AddWithValue("@userid", txtName.Text);
            cmd.Parameters.AddWithValue("@pwd", txtPwd.Text);
            if (cmd.ExecuteNonQuery() == 1)
            {
                Response.Write("<script>alert('添加成功！')</script>");
                //lbtianjia.Text = "添加成功！";

            }
            cmd = null;
            con.Close();
        }
        //}
        
    }
    protected void txtName_TextChanged(object sender, EventArgs e)
    {
        SqlConnection con = DB.con();
        SqlCommand cmd = new SqlCommand();