有关C#类命名的问题
许久没写东西了,今天做自己的个人网站时,遇到一个命名的问题,在Ryu666.NET的帮助下,找出问题,谢谢!
在些将问题贴上来,避免下次出同样的问题.
由于,在数据层和web层中,采用相同的名命,导致编译时总是出错,找不到子类UserLogin.原因是两个地方的类都是login,系统调用时,不知调用那个Login,特贴出代码,由这个细节的问题,提醒我们,一定要注意,C#规范名命.
数据层:
using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using Microsoft.ApplicationBlocks.Data;
namespace DataAccess
{
/// <summary>
/// Login 的摘要说明。
/// </summary>
public class Login
{
private SqlConnection mySqlConnection;
public static readonly string CONN=System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
public Login()
{
mySqlConnection = new SqlConnection(CONN.ToString());
}
public string UserLogin(string username,string password)
{
SqlParameter [] arParms = new SqlParameter[3];
// @ProductName Output Parameter
arParms[0] = new SqlParameter("@UserName", SqlDbType.NVarChar,50);
arParms[0].Value=username;
arParms[1] = new SqlParameter("@Password", SqlDbType.NVarChar,50);
arParms[1].Value=password;
arParms[2] =new SqlParameter("@UserId",SqlDbType.Int);
arParms[2].Direction= ParameterDirection.Output;
SqlHelper.ExecuteNonQuery(mySqlConnection, CommandType.StoredProcedure, "UserLogin", arParms);
int userId =(int)(arParms[2].Value);
if (userId ==0)
{
return null;
}
else
{
return userId.ToString();
}
}
}
}
web层
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 DataAccess;
namespace lgh.admin
{
/// <summary>
/// Login 的摘要说明。
/// </summary>
public class Login : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
protected System.Web.UI.HtmlControls.HtmlForm Form1;
protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
protected System.Web.UI.WebControls.TextBox txtName;
protected System.Web.UI.WebControls.TextBox txtPass;
protected System.Web.UI.WebControls.Button Button3;
protected System.Web.UI.WebControls.Button Button2;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
}
#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.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void Button1_Click(object sender, System.EventArgs e)
{
DataAccess.Login ULogin=new DataAccess.Login();//注意,要加DataAccess
//Login ULogin= new Login() //原出错代码
string userId =ULogin.UserLogin(txtName.Text,txtPass.Text);
if(userId !=null)
{
//Response.Cookies[UserName].Value=a;//;?//
//FormsAuthentication.RedirectFromLoginPage(userId,false);
Response.Redirect("indeex.aspx");
}
else
{
Response.Write("<script language=javascript>alert('登录失败!')</script>");
}
}
}
}