对数据库表操作，统一的方法。
using System;
using System.Collections.Generic;
using System.Text;
using SW.Henu.DAO;
using System.Data;
namespace LogisManageLibrary
{
/// <summary>
/// 所有操作表类的抽象基类
/// </summary>
public abstract class AManage
{
/// <summary>
/// 对应表的字段名称列表
/// </summary>
public List<string> attributeList { set; get; }
/// <summary>
/// 对应表的字段名称列表
/// </summary>
public List<string> valueList { set; get; }
/// <summary>
/// 对应的表名
/// </summary>
public string tableName { set; get; }
// 声明委托
public delegate StringBuilder SetSQLBySelf();
/// <summary>
/// 初始化字段列表
/// </summary>
public AManage()
{
attributeList = new List<string>();
valueList = new List<string>();
}
/// <summary>
/// 初始化表和字段的信息，绑定数据表的定义结构
/// </summary>
/// <example>tableName="Table";attributeList.Add("Field");</example>
public abstract void Initialize();
/// <summary>
/// 求解查询语句
/// </summary>
/// <returns>返回查询表</returns>
/// <example>string ps_Sql = "select Guid,SimpName as 客户简称,[Name] as 客户名称,LinkMan as 联系人,Telephone as 电话,Fax as 传真,Address as 地址,Zip as 邮编,SellType as 销售类别,ProductName as 产品名称,Remark as 备注,Case when IsEnable=1 then '停用' when IsEnable=0 then '可用' end as 是否可用 from Client ";</example>
public abstract StringBuilder SetSelectSQL();
/// <summary>
/// 求解插入的SQL语句
/// </summary>
/// <returns></returns>
/// <example>strSql.Append("insert into [Client](");</example>
public abstract StringBuilder SetInsertSQL();
/// <summary>
/// 求解更新的SQL语句
/// </summary>
/// <returns></returns>
/// <example>strSql.Append("update Client set ");</example>
public abstract StringBuilder SetUpdateSQL();
/// <summary>
/// 求解删除的SQL语句
/// </summary>
/// <returns></returns>
/// <example>string ps_Sql = "delete from Client where Guid='" + ClientGuid + "'";</example>
public abstract StringBuilder SetDeleteSQL();
/// <summary>
/// 通过pSql得到当前是新增状态还是修改状态
/// </summary>
/// <param name="pObj">信息集实例</param>
/// <param name="pSql">string pSql = "";pSql = "SELECT Guid FROM Client " +"where Guid ='" + pObj.Guid + "'";</param>
/// <returns>返回True或False</returns>
private bool SaveStatus(string pSql)
{
CommonInterface pComm = CommonFactory.CreateInstance(CommonData.sql);
try
{
DataTable pDT = pComm.ExeForDtl(pSql);
pComm.Close();
if (pDT.Rows.Count > 0)
{
return true;
}
else
{
return false;
}
}
catch (Exception e)
{
pComm.Close();
throw e;
}
}
/// <summary>
/// 保存数据
/// </summary>
/// <param name="pObj">信息集实体类</param>
/// <param name="pSql">string pSql = "";pSql = "SELECT Guid FROM Client " +"where Guid ='" + pObj.Guid + "'";</param>
/// <returns>返回保存成功(true)或失败(false)</returns>
public bool Save(string pSql)
{
try
{
if (SaveStatus(pSql) == false)
{
return Insert();
}
else
{
return Update();
}
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 得到数据
/// </summary>
/// <returns></returns>
public DataTable Select()
{
CommonInterface pObj_Comm = CommonFactory.CreateInstance(CommonData.sql);
try
{
DataTable pDTMain = pObj_Comm.ExeForDtl(SetSelectSQL().ToString());
pObj_Comm.Close();
return pDTMain;
}
catch (Exception e)
{
pObj_Comm.Close();
throw e;
}
}
/// <summary>
/// 增加一条数据
/// </summary>
public bool Insert()
{
CommonInterface pComm = CommonFactory.CreateInstance(CommonData.sql);
try
{
pComm.Execute(SetInsertSQL().ToString());//执行Sql语句无返回值
pComm.Close();
return true;
}
catch (System.Exception e)
{
pComm.Close();
throw e;
}
}
/// <summary>
/// 更新一条数据
/// </summary>
public bool Update()
{
CommonInterface pComm = CommonFactory.CreateInstance(CommonData.sql);
try
{
pComm.Execute(SetUpdateSQL().ToString());//执行Sql语句无返回值
pComm.Close();
return true;
}
catch (System.Exception e)
{
pComm.Close();
throw e;
}
}
/// <summary>
/// 删除
/// </summary>
/// <returns></returns>
public void Delete()
{
CommonInterface pObj_Comm = CommonFactory.CreateInstance(CommonData.sql);
try
{
pObj_Comm.Execute(SetDeleteSQL().ToString());
pObj_Comm.Close();
}
catch (Exception e)
{
pObj_Comm.Close();
throw e;
}
}
/// <summary>
/// 由参数的SQL语句增删改数据库
/// </summary>
public void NotSelect(string pSql)
{
CommonInterface pObj_Comm = CommonFactory.CreateInstance(CommonData.sql);
try
{
pObj_Comm.Execute(pSql);
pObj_Comm.Close();
}
catch (Exception e)
{
pObj_Comm.Close();
throw e;
}
}
/// <summary>
/// 得到数据
/// </summary>
/// <returns></returns>
public DataTable Select(string pSql)
{
CommonInterface pObj_Comm = CommonFactory.CreateInstance(CommonData.sql);
try
{
DataTable pDTMain = pObj_Comm.ExeForDtl(pSql);
pObj_Comm.Close();
return pDTMain;
}
catch (Exception e)
{
pObj_Comm.Close();
throw e;
}
}
/// <summary>
/// 通过委托得到数据
/// </summary>
/// <returns></returns>
public DataTable SelectBySelf(SetSQLBySelf sql)
{
CommonInterface pObj_Comm = CommonFactory.CreateInstance(CommonData.sql);
try
{
DataTable pDTMain = pObj_Comm.ExeForDtl(sql().ToString());
pObj_Comm.Close();
return pDTMain;
}
catch (Exception e)
{
pObj_Comm.Close();
throw e;
}
}
/// <summary>
/// 由委托增删改数据库
/// </summary>
public void NotSelect(SetSQLBySelf sql)
{
CommonInterface pObj_Comm = CommonFactory.CreateInstance(CommonData.sql);
try
{
pObj_Comm.Execute(sql().ToString());
pObj_Comm.Close();
}
catch (Exception e)
{
pObj_Comm.Close();
throw e;
}
}
}
}
这写代码定义了所有的增删改查功能，只需要重写方法，或者委托，或者直接调用写入SQL语句即可。
该代码写了三种查询方式。重写，委托和直接调用。具体怎么用我还没有事件，但是经过老师的测试，很好用。
和大家分享下。