最近学习 linq to sql 感觉还是可以的,方便快捷,以前问是以为不好用,不想用,但是今天用了一下感觉还是不错的, 确实是快,但是我又在想如果出错了怎么办,这样一个类里放那么多的文件是有点不好,再说了 linq to sql 低层不知道怎么实现的,还是没有自己写的访问感觉舒服点呵呵!!!如果是快速开发用 linq to sql 还是不错的选择啊!!!-基本的增删除改查

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
namespace WebServiceText
{
    /// <summary>
    /// Service1 的摘要说明
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ToolboxItem(false)]
    // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务,请取消对下行的注释。
    // [System.Web.Script.Services.ScriptService]
    public class Service1 : System.Web.Services.WebService
    {
        DataClasses1DataContext context = new DataClasses1DataContext();
        [WebMethod]
        public List<Text> selectSwhere(int startid,int endid)
        {
            var result = (from text in context.Text
                          where text.id >= startid  && text .id <=endid
                          select text).ToList<Text>();
            return result;
        }
        [WebMethod]
        public List<Text> selectAll()
        {
            return context.Text.ToList<Text>();
        }
        /// <summary>
        /// 添加一个数据
        /// </summary>
        /// <param name="sex">性别</param>
        /// <param name="age">年龄</param>
        /// <returns>成功为True否则为False</returns>
        [WebMethod]
        public List<Text> addText(string sex, int age)
        {
            Text text = new Text();
            text.age = age;
            text.sex = sex;
            //context.Text.First<Text>();
            // 使用Sql方式查询
            //var result = (from text in context.Text
            //             select text).ToList<Text>();
            // 提交一个插入
            context.Text.InsertOnSubmit(text);
            // 更新数据库
            context.SubmitChanges();
            var result = context.Text.ToList<Text>();
            return result;
                    
        }
        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="id">根据ID做删除</param>
        /// <returns>成功为True否则为False</returns>
        [WebMethod]
        public List<Text> deleterText(int id)
        {
            // 删除
            var text1 = (from t in context.Text
                         where t.id == id
                         select t).First<Text>();
            context.Text.DeleteOnSubmit(text1);
            context.SubmitChanges();
            var result = context.Text.ToList<Text>();
            return result;
                    
        }
        /// <summary>
        /// 修改Text
        /// </summary>
        /// <param name="id">编号</param>
        /// <param name="sex">性别</param>
        /// <param name="age">年龄</param>
        /// <returns>成功为True否则为False</returns>
        [WebMethod]
        public List<Text> updateText(int id, string sex, int age)
        {
            // 更新
            var text = (from t in context.Text
                        where t.id == id
                        select t).First<Text>();
            text.age = age;
            text.sex = sex;
            context.SubmitChanges();
            var result = context.Text.ToList<Text>();
            return result;
        }
        /// <summary>
        /// 查询
        /// </summary>
        /// <param name="Swhere">条件</param>
        /// <returns>返回一个表</returns>
        [WebMethod]
        public List<Text> selectText(int id)
        {
            //使用Sql方式查询
            var result = (from text in context.Text
                          where text.id == id
                          select text).ToList<Text>();
            return result;
                    
        }
    }
}

1. TCDataClasses1DataContext tc = new TCDataClasses1DataContext();
tc.ExecuteCommand("update table set sceState = 9 where sceState = 7");可以真写语句方便
2.TCDataClassesDataContext tc = new TCDataClassesDataContext(); tc.PGetAccountBalance(ofid).ToList()[0]
可以直接用存储过程的名称调用也很方便,呵呵。
大家有什么经验顶顶吧

http://www.sufeinet.com/forum.php?mod=viewthread&tid=129