三层构架的后台新闻管理系统ACCESS版(三）

前一节，就是查询，下面看看添加
表面层:


protected void BTtrue_Click(object sender, EventArgs e)




.........{


if (Page.IsValid == true)




.........{


CXF.newstitle = tbtitle.Text;//在CXF类用定义的字符串名称


CXF.newsbody = FTBbody.Text;


CXF.newsdate = DateTime.Now.ToString();


CXF.newsathor = tbauth.Text;


CXF.ADDdata(tableID);//CXF类的添加方法


this.tbtitle.Text = "";


this.FTBbody.Text = "";


this.tbauth.Text = "";


Response.Write("<script language='javascript'>alert('添加成功!')</script>");


newsbind();


}


}

业务层的添加方法:


public static OleDbCommand ADDdata(string tableID)//取的表名参数




...{


string stredit = "";


switch (tableID)




...{


case "hzhb":


stredit = string.Format(@"SELECT MAX(hzhb_ID) AS [hzhb_id] FROM [hzhb]");


break;


case "news":


stredit = string.Format(@"SELECT MAX(news_ID) AS [news_id] FROM [news]");


break;//因为现在是新闻添加，在此跳出


case "guest":


stredit = string.Format(@"SELECT MAX(guest_ID) AS [guest_id] FROM [guest]");


break;


case "PEO":


stredit = string.Format(@"SELECT MAX(PEO_ID) AS [PEO_id] FROM [PEO]");


break;


case "user":


stredit = string.Format(@"SELECT MAX(user_ID) AS [user_id] FROM [user]");


break;


case "list":


stredit = string.Format(@"SELECT MAX(list_ID) AS [list_id] FROM [list]");


break;


case "product":


stredit = string.Format(@"SELECT MAX(productID) AS [productid] FROM [product]");


break;




}


OleDbDataReader odr = DB.Get_Edit(stredit);//执行一个DB类查询最大ID号的方法,


if (odr.Read())




...{


addID = odr.GetInt32(0) + 1;


}


else


addID = 1;


string strdelete = "";


switch (tableID)




...{


case "hzhb":


strdelete = string.Format(@"INSERT INTO [hzhb] VALUES('" + addID + "','" + hzhbname + "','" + hzhbbody + "','" + hzhbimage + "','" + DateTime.Now + "')");


break;


case "PEO":


strdelete = string.Format(@"INSERT INTO [PEO] VALUES('" + addID + "','" + PEOname + "','" + PEOcc + "','" + PEOabout + "','" + PEOimg + "')");


break;


case "news":


strdelete = string.Format(@"INSERT INTO [news] VALUES('" + addID + "','" + newstitle + "','" + newsbody + "','" + DateTime.Now + "','" + newsathor + "')");


break;


case "shop":


strdelete = string.Format(@"INSERT INTO [Product] VALUES('" + shopcategoryId + "','" + addID + "','" + shopProductName + "','" + shopPrice + "','" + shopImage + "','" + shopDetail + "')");


break;


}


OleDbCommand cmd = DB.Get_Delete(strdelete);//执行一个DB类添加数据的方法,




return cmd;


}

数据处理层


public static OleDbCommand Get_Delete(string strdelete)




...{


using (OleDbConnection con = DB.con())




...{


con.Open();


OleDbCommand cmd = new OleDbCommand(strdelete, con);


cmd.ExecuteNonQuery();


return cmd;


}


}


//取的参数执行数据库


//此方法功能强大，此系统中的删除/添加/更新都将用到此方法


public static OleDbDataReader Get_Edit(string stredit)




...{


OleDbConnection con = DB.con();


con.Open();


OleDbCommand cmd = new OleDbCommand(stredit, con);


OleDbDataReader odr = cmd.ExecuteReader();


return odr;


}