小编Enr*_*ani的帖子

我在编写winforms或wpf应用程序以对数据库执行查询时总是采用的方法如下:

• 设计一个带有多个控件的接口,以将参数传递给我的查询类

• 使用Linq或Entity Framework作为数据源,使用查询的字段,属性和方法构建"DataAccess"类.

• Managing the events generated by the controls, to pass parameters and select wich method to use to retrieve data.

Example from the DataAccess class:

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

namespace MyApplication
{
    public class DataAccess
    {
        public LinqDataContext db = new LinqDataContext();

#region Private Fields
#region Properties(Constructors)
#region Methods

// Sample method
public List<DataAccess> Mymethod(string valoredata, int esenzione,
            string valorebatch)
{
    if (esenzione == 0)
    {
        return (from elementi in db.IndexTables
            from elementi2 …