小编use*_*038的帖子

我的登录系统有问题.我制作了一个运行良好的简单系统,但我想让它更高级,并根据用户的不同显示不同的起始页面UserType.但是,我遇到以下错误:"必须声明标量变量@UserType."

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

public partial class LoginwithEncryption : System.Web.UI.Page
{

    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conStr"].ConnectionString);
        con.Open();
        SqlCommand cmd = new SqlCommand(
            "select * from dbo.UserInfo where Login =@Login and UserType=@UserType and Password=@Password and UserType=@UserType", con);
        cmd.Parameters.AddWithValue("@Login", txtUserName.Text);
        cmd.Parameters.AddWithValue("@Password", txtPWD.Text+".123");


        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataTable dt = new DataTable();
        da.Fill(dt);

        if (dt.Rows.Count > 0)
        {
            int usertype = Convert.ToInt32(dt.Rows[0]["UserType"]);


            if (usertype == 1)
            {
                Response.Redirect("StartPage.aspx"); …

当我尝试将数据从textfile移动到arraylist时,我在行data.add(row)上得到错误; (找不到合适的方法)我该如何解决？如果我想用它来填充java jtable(swing),那么使用arraylist是个好主意吗？

 public ArrayList<String> getinformationforthetable() {
    Scanner s = null;
    ArrayList<String> data = new ArrayList<String>();
    try {
        s = new Scanner(new File("info.txt"));
        while (s.hasNextLine()) {
        String line = s.nextLine();
        if (line.startsWith("")) {
            String[] atoms = line.split("[#]");
            ArrayList<String> row = new ArrayList<String>();
            row.add(atoms[0]);
            row.add(atoms[1]);
                    row.add(atoms[2]);
                    row.add(atoms[3]);
                    row.add(atoms[4]);
                    row.add(atoms[5]);
            data.add(row);

        }
        }
    }
    catch(IOException e) {
        e.printStackTrace();    
    }
    finally {
        if (s != null) {
        s.close();
        }
    }
    return data;
    }
}