webusercontrol.ascx.cs

这是asp.net^和Visual C++Sharp编写的串并口通讯的书籍 源代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

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

    }

    public int checkLogin(string loginName, string loginPwd)
    {
        SqlConnection con = new SqlConnection("Server=(local);database=mrdb;Uid=sa;Pwd=");
        SqlCommand myCommand = new SqlCommand("select count(*) from UserData where loginName=@loginName and loginPwd=@loginPwd", con);
        myCommand.Parameters.Add(new SqlParameter("@loginName", SqlDbType.NVarChar, 20));
        myCommand.Parameters["@loginName"].Value = loginName;
        myCommand.Parameters.Add(new SqlParameter("@loginPwd", SqlDbType.NVarChar, 20));
        myCommand.Parameters["@loginPwd"].Value = loginPwd;
        myCommand.Connection.Open();
        int i = (int)myCommand.ExecuteScalar();
        myCommand.Connection.Close();
        return i;
    }
    protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
    {
        int i = this.checkLogin(txtName.Text, txtPwd.Text);
        if (i > 0)
        {
            if (txtCheckCode.Text == Session["CheckCode"].ToString())
            {
                Response.Write("<script>alert('登录成功！！！')</script>");
            }
            else
            {
                Response.Write("<script>alert('验证码输入错误！！！')</script>");
            }
        }
        else
        {
            Response.Write("<script>alert('用户名称或密码错误！！！')</script>");
        }
    }
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        txtName.Text = "";
        txtPwd.Text = "";
    }
}