BLL.classBll不包含InsertUserDetails的定义，并且没有扩展方法'InsertUserdetails'接受第一个参数类型可以找到 [英] BLL.classBll does not contain a definition for InsertUserDetails and no extension method 'InsertUserdetails' accepting first argument type Could be found

问题描述

演示层代码



使用System;

使用System.Collections.Generic;

使用System .Linq;

使用System.Web;

使用System.Web.UI;

使用System.Web.UI.WebControls;

使用BLL;

使用DAL;



名称空间_3_tiersample

{

public partial class RegistrationForm：System.Web.UI.Page

{

classBLL Objbal = new classBLL（）;

protected void Page_Load（object sender，EventArgs e）

{



}



protected void Button1_Click（object sender，EventArgs e）

{

try

{

string Output = string.Empty;

classBLL Objbalregistration = new classBLL（）;

Objbalregistration.Name = TextBox1.Text;

Objbalregistration.Roll_Number = Convert.ToInt32（TextBox2.Text）;

Objbalregistration.Email_Id = TextBox3.Text;

Objbalregistration.Mobile_Number = TextBox4.Text;

Objbalregistration.InsertUserDetails（Objbal）; //这里我得到上述错误请帮帮我

Console.WriteLine（数据已插入）;

} < br $>
catch（Ex Ex）

{

Console.WriteLine（Ex）;

}

}



}

}

数据访问层;

使用System.Text;

使用System.Data;

使用System.Data.SqlClient;

使用System.Configuration;

使用BLL;



名称空间DAL

{

公共类classDAL

{

string connection = ConfigurationManage r.ConnectionStrings [ConnectionString]。ConnectionString;



public void InsertUserDetails（classBLL Objbal）

{

SqlConnection con = new SqlConnection（connection）;

SqlCommand cmd = new SqlCommand（sp_InsertEmpdetails，con）;

cmd.CommandType = CommandType.StoredProcedure;

con.Open（）;

尝试

{

cmd.Parameters.AddWithValue（@ Name，Objbal。姓名）;

cmd.Parameters.AddWithValue（@ Roll_Number，Objbal.Roll_Number）;

cmd.Parameters.AddWithValue（@ Email_Id，Objbal.Email_Id） ;

cmd.Parameters.AddWithValue（@ Mobile_Number，Objbal.Mobile_Number）;

Console.WriteLine（数据保存）;

}

catch（Exception Ex）

{

Console.WriteLine（Ex） ;

}

终于

{

con.Dispose（）;

}



}



}

}

业务逻辑层代码

 使用系统; 
 使用 System.Collections.Generic; 
 使用 System.Linq; 
 使用 System.Text; 
 使用 DAL; 
 
 
 命名空间 BLL 
 {
  public   class  classBLL 
 {
  private   string  _Name; 
  private   int  _Roll_Number; 
  private   string  _Email_Id; 
  public   string  _Mobile_Number; 
 
 
  public   string 名称
 {
  set  {_ Name =  value ; } 
  get  { return  _Name; } 
} 
  public   int  Roll_Number 
 {
  set  {_Roll_Number =  value ; } 
  get  { return  _Roll_Number; } 
} 
  public   string  Email_Id 
 {
  set  {_Email_Id =  value ; } 
  get  { return  _Email_Id; } 
} 
  public   string  Mobile_Number 
 {
  set  {_Mobile_Number =  value ; } 
  get  { return  _Mobile_Number; } 
} 
 
} 
} 
先谢谢

解决方案

制作DAL的实例。如果你看到

InsertUserDetails方法在DAL里面

 classDAL objClassDAL =  new  classDAL（）; 
 objClassDAL.InsertUserDetails（Objbalregistration）

更改您的代码如下



< pre lang =cs> protected void Button1_Click（ object 发​​件人，EventArgs e）
{
尝试
{
string 输出= 字符串 .Empty;

classDAL objClassDAL = new classDAL（）;
classBLL Objbalregistration = new classBLL（）;

Objbalregistration.Name = TextBox1.Text;
Objbalregistration.Roll_Number = Convert.ToInt32（TextBox2.Text）;
Objbalregistration.Email_Id = TextBox3.Text;
Objbalregistration.Mobile_Number = TextBox4.Text;

objClassDAL.InsertUserDetails（Objbalregistration）;
Console.WriteLine（ 数据已插入）;

}
catch （Ex Ex）
{
Console.WriteLine（Ex.Message）;
}
}

Presentation Layer Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using BLL;
using DAL;

namespace _3_tiersample
{
public partial class RegistrationForm : System.Web.UI.Page
{
classBLL Objbal = new classBLL();
protected void Page_Load(object sender, EventArgs e)
{

}

protected void Button1_Click(object sender, EventArgs e)
{
try
{
string Output = string.Empty;
classBLL Objbalregistration = new classBLL();
Objbalregistration.Name = TextBox1.Text;
Objbalregistration.Roll_Number = Convert.ToInt32(TextBox2.Text);
Objbalregistration.Email_Id = TextBox3.Text;
Objbalregistration.Mobile_Number = TextBox4.Text;
Objbalregistration.InsertUserDetails(Objbal);//here Iam getting the above error please help me out
Console.WriteLine("Data Inserted");
}
catch(Exception Ex)
{
Console.WriteLine(Ex);
}
}

}
}
Data Access Layer;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using BLL;

namespace DAL
{
public class classDAL
{
string connection = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

public void InsertUserDetails(classBLL Objbal)
{
SqlConnection con = new SqlConnection(connection);
SqlCommand cmd = new SqlCommand("sp_InsertEmpdetails", con);
cmd.CommandType = CommandType.StoredProcedure;
con.Open();
try
{
cmd.Parameters.AddWithValue("@Name", Objbal.Name);
cmd.Parameters.AddWithValue("@Roll_Number", Objbal.Roll_Number);
cmd.Parameters.AddWithValue("@Email_Id", Objbal.Email_Id);
cmd.Parameters.AddWithValue("@Mobile_Number", Objbal.Mobile_Number);
Console.WriteLine( "data saved");
}
catch (Exception Ex)
{
Console.WriteLine(Ex);
}
finally
{
con.Dispose();
}

}

}
}
Business Logic Layer Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DAL;


namespace BLL
{
    public class classBLL
    {
        private string _Name;
        private int _Roll_Number;
        private string _Email_Id;
        public string _Mobile_Number;


        public string Name
        {
            set { _Name = value; }
            get { return _Name; }
        }
        public int Roll_Number
        {
            set { _Roll_Number = value; }
            get { return _Roll_Number; }
        }
        public string Email_Id
        {
            set { _Email_Id = value; }
            get { return _Email_Id; }
        }
        public string Mobile_Number
        {
            set { _Mobile_Number = value; }
            get { return _Mobile_Number; }
        }

    }
}
Thanks In Advance

解决方案

Make the instance of DAL. if you see
InsertUserDetails method is inside DAL

classDAL objClassDAL = new classDAL();
 objClassDAL.InsertUserDetails(Objbalregistration) 

Change your code as below

protected void Button1_Click(object sender, EventArgs e)
 {
 try
 {
 string Output = string.Empty;

 classDAL objClassDAL = new classDAL();
 classBLL Objbalregistration = new classBLL();

 Objbalregistration.Name = TextBox1.Text;
 Objbalregistration.Roll_Number = Convert.ToInt32(TextBox2.Text);
 Objbalregistration.Email_Id = TextBox3.Text;
 Objbalregistration.Mobile_Number = TextBox4.Text;
 
 objClassDAL.InsertUserDetails(Objbalregistration);
 Console.WriteLine("Data Inserted");
 
 }
 catch(Exception Ex)
 {
 Console.WriteLine(Ex.Message);
 }
 }

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