ADO.NET访问Access(文本数据库)数据操作(CRUD)

1，ADO.NET访问Access(文本数据库)数据操作(CRUD)

 

2，DatabaseDesign

文本数据库Northwind.mdb

3，/App_Code

 3.1,/App_Code/DBConnection.cs

View Code

//引用Access文本数据的类

using System.Data.OleDb;



/// <summary>

/// DBConnection 的摘要说明

/// </summary>

public class DBConnection

{

    OleDbConnection con = null;



   

    public DBConnection()

    {        

        con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=E:\\northwind.mdb;");

    }



    public OleDbConnection Con

    {

        get { return con; }

        set { con = value; }

    }



}

3.2,/App_Code/ProductsInfo.cs

View Code

/// <summary>

/// ProductsInfo 的摘要说明

/// </summary>

public class ProductsInfo

{

    //字段

    int productid;

    string productname;    

    decimal unitprice;       

    int categoryid;

    



    public ProductsInfo()

    {

        //

        // TODO: 在此处添加构造函数逻辑

        //

    }

    //插入商品

    public ProductsInfo(string productname, decimal unitprice, int categoryid)

    {

        this.productname = productname;

        this.unitprice = unitprice;

        this.categoryid = categoryid;

    }

    //查看全部

    //插入商品

    public ProductsInfo(int productid, string productname, decimal unitprice, int categoryid)

    {

        this.productid = productid;

        this.productname = productname;

        this.unitprice = unitprice;

        this.categoryid = categoryid;

    }

    //封装

    public int Productid

    {

        get { return productid; }

        set { productid = value; }

    }

    public string Productname

    {

        get { return productname; }

        set { productname = value; }

    }

    public decimal Unitprice

    {

      get { return unitprice; }

      set { unitprice = value; }

    }

    public int Categoryid

    {

        get { return categoryid; }

        set { categoryid = value; }

    }

}

3.3,/App_Code/ProductsOper.cs  (注意在做删除做作时，请在delete之后添加关键词“from”)

View Code

using System.Data.OleDb;

using System.Collections.Generic;

/// <summary>

/// ProductsOper 的摘要说明

/// </summary>

public class ProductsOper

{

    public ProductsOper()

    {

        //

        // TODO: 在此处添加构造函数逻辑

        //

    }

    //插入商品

    public static void Insert(ProductsInfo product)

    {

        string sql = "insert into 产品(产品名称,单价,类别ID) values(@productname,@unitprice,@categoryid)";



        OleDbConnection con = new DBConnection().Con;

        OleDbCommand com = new OleDbCommand();



        com = con.CreateCommand();

        com.CommandText = sql;

        //配参

        com.Parameters.Add(new OleDbParameter("@productname", product.Productname));

        com.Parameters.Add(new OleDbParameter("@unitprice", product.Unitprice));

        com.Parameters.Add(new OleDbParameter("@categoryid", product.Categoryid));

        con.Open();

        com.ExecuteNonQuery();

        con.Close();

    }

    //查所有产品

    public static IList<ProductsInfo> GetProductByCateid(int cateid)

    {

        string sql = "select 产品ID,产品名称,单价,类别ID from 产品 where 类别ID=@cateid";

        IList<ProductsInfo> products = new List<ProductsInfo>();



        OleDbConnection con = new DBConnection().Con;

        OleDbCommand com = new OleDbCommand();

        com = con.CreateCommand();





        com.Parameters.Add(new OleDbParameter("@cateid", cateid));

        com.CommandText = sql;



        con.Open();



        OleDbDataReader oddr = com.ExecuteReader();

        while (oddr.Read())

        {

            ProductsInfo product = new ProductsInfo(oddr.GetInt32(0), oddr.GetString(1), oddr.GetDecimal(2), oddr.GetInt32(3));

            products.Add(product);

        }

        con.Close();



        return products;

    }

    //根据productid删除

    public static void Delete(int productid)

    {

        string sql = "delete from 产品 where 产品ID=@productid";



        OleDbConnection con=new DBConnection().Con;

        OleDbCommand com=new OleDbCommand();



        com=con.CreateCommand();

        //配参

        com.Parameters.Add(new OleDbParameter("@productid", productid));



        com.CommandText=sql;

        con.Open();



        com.ExecuteNonQuery();

        con.Close();



    }



    ////根据productid更新数据

    public static void Update(ProductsInfo prod)

    {



        string sql = "update 产品 set 产品名称=@productname,单价=@unitprice,类别ID=@categoryid "

            +" where 产品ID=@productid";



        OleDbConnection con = new DBConnection().Con;

        OleDbCommand com = new OleDbCommand();



        com = con.CreateCommand();

        com.CommandText = sql;

        //配参

        com.Parameters.Add(new OleDbParameter("@productname", prod.Productname));

        com.Parameters.Add(new OleDbParameter("@unitprice", prod.Unitprice));

        com.Parameters.Add(new OleDbParameter("@categoryid", prod.Categoryid));

        com.Parameters.Add(new OleDbParameter("@productid", prod.Productid));

        con.Open();



        com.ExecuteNonQuery();

        con.Close();

    }

}

4，功能截图

5,源代码下载

 http://ylbtechdotnet.googlecode.com/files/ADO-%E6%9D%82%E9%A1%B9.zip

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