Question

美好的一天！使用visual studio 2012，我创建了一个带有get和set代码的Student类，我需要完成StudentDAO类来创建用于将数据存储到数据库学生表的插入编码。此操作由Windows窗体按钮单击事件执行。

我需要创建按钮点击代码，然后插入数据库代码，

// Student.cs class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace SRSJason
{

class Student
{
    private string S_Student_id;
    private string S_Full_name;
    private DateTime S_Dob;
    private string S_Address;
    private int S_Contact;
    private string S_Username;
    private string S_Password;


    public Student()        //Default constructor
    {

    }

    public Student(string Student_id, string Full_name, DateTime Dob, string Address, int Contact, string Username, string Password)  //Overloadign
    {
        S_Student_id = Student_id;
        S_Full_name = Full_name;
        S_Dob = Dob;
        S_Address = Address;
        S_Contact = Contact;
        S_Username = Username;
        S_Password = Password;
    }

    public void setID(string Student_id)
    {
        S_Student_id = Student_id;
    }
    public string getID()
    {
        return S_Student_id;
    }

    public void setName(string Full_name)
    {
        S_Full_name = Full_name;
    }
    public string getName()
    {
        return S_Full_name;
    }

    public void setDob(DateTime Dob)
    {
        S_Dob = Dob;
    }
    public DateTime getDob()
    {
        return S_Dob;
    }

    public void setAddress(string Address)
    {
        S_Address = Address;
    }
    public string getAddress()
    {
        return S_Address;
    }

    public void setContact(int Contact)
    {
        S_Contact = Contact;
    }
    public int getContact()
    {
        return S_Contact;
    }

    public void setUsername(string Username)
    {
        S_Username = Username;
    }
    public string getUsername()
    {
        return S_Username;
    }

    public void setPassword(string Password)
    {
        S_Password = Password;
    }
    public string getPassword()
    {
        return S_Password;
    }




}

}`

// StudentDAO课程（请帮我完成此代码）

`class StudentDAO
{
    static string constring = "Data Source=JAZE;Initial Catalog=srsjason;Integrated Security=True";
    SqlConnection m_con = new SqlConnection(constring);


}`

//从表单中单击按钮（请帮我完成此代码）

private void submitstudent(object sender, EventArgs e)
    {


    }

请帮我完成此编码

Answer 1

首先，当您创建私有属性时，您无法在表单中访问它们，您必须在同一个类中创建一个方法，然后在表单中使用它。第二，你应该知道你正在使用的ORM - Object Relational Mapping。

我将在此列出：

当你选择其中一个时。下一步将学习它们的工作原理和语法。

但是知道你有点显示ADO.NET的语法这是一个如何使用ADO.NET在数据库中插入数据的示例。如果要在没有方法的情况下直接从代码隐藏添加数据。所以基本上是按钮的点击事件。

private void btn_Click(object sender, EventArgs e)
{
  try
  {
   //create  object  of Connection Class..................
   SqlConnection con = new SqlConnection();

   // Set Connection String property of Connection object..................
  con.ConnectionString = "Data Source=KUSH-PC;Initial Catalog=test;Integrated           Security=True";

 // Open Connection..................
  con.Open();

 //Create object of Command Class................
 SqlCommand cmd = new SqlCommand();

//set Connection Property  of  Command object.............
cmd.Connection = con;
//Set Command type of command object
//1.StoredProcedure
//2.TableDirect
//3.Text   (By Default)

cmd.CommandType = CommandType.Text;

//Set Command text Property of command object.........

cmd.CommandText = "Insert into Registration (Username, password) values ('@user','@pass')";

//Assign values as `parameter`. It avoids `SQL Injection`
cmd.Parameters.AddWithValue("user", TextBox1.text);
cmd.Parameters.AddWithValue("pass", TextBox2.text);

       //Execute command by calling following method................
  //1.ExecuteNonQuery()
       //This is used for insert,delete,update command...........
  //2.ExecuteScalar()
       //This returns a single value .........(used only for select command)
  //3.ExecuteReader()

      //Return one or more than one record.
  cmd.ExecuteNonQuery();
  con.Close();


  MessageBox.Show("Data Saved");          
  }
     catch (Exception ex)
     {
            MessageBox.Show(ex.Message);
            con.Close();
     }


    }

请确保您已将ConnectionString添加到config文件中。

如何使用c＃编程将数据添加到MSQL数据库中？

1 个答案: