我说我连个登录代码都不会写，你们会不会让我去死
妹子很辛酸。。。啥也不说了。。。。
问题关键字：ASP.NET，登录，三层架构，代码
写了好几个都错了...T_T..。看图，


asp.net?三层架构 asp.net 三层架构
[解决办法]

   public bool CheckTeacherExistence(string name,string pwd)
    {
        ...
        string sql = "select count(*) from Teacher where TeacherName=" + name + " and     TeacherPwd=" + pwd;
        ...
    }

    public bool CheckTeacherExistence(string name,string pwd)
    {  
        return adminData.CheckTeacherExistence(name,pwd);
    }


    if(adminBusiness.CheckTeacherExistence(teacherName,teacherPwd)) 
    {
       .......
    }

手写好累
[解决办法]
string sql = "select count(*) from Teacher where TeacherName='" + name + "' and TeacherPwd='" + pwd + "'"; //参数两边需要加单引号


UI:
if(adminBusiness.CheckTeacherExistence(username.Text.Trim(),pwd.Text.Trim()).Tables[0].Rows.Count>0)