有关增删改

[zhxingway]

您好，感谢你阅读此帖．
小弟asp.net刚入门，做过几个小项目．

在此希望各位大侠推荐几个有关数据库增删改的比较好的项目（源码）以及

分页算法（用于大量数据分页，思路是一次只读出一页数据），供小弟学习，不胜感激．．．


祝各位工作顺利，天天开心．

[zhxingway]

请大家帮忙推荐一下自己看过的比较好的项目啊，谢谢啦．．．．

51aspx那里有很多代码，都不知道看哪个好呢．．

[jiang_jiajia10]

http://www.51aspx.com

[liuyeede]

/*分页存储过程
Descript:分页存储过程
Author:Blue.Dream
Date:2004-8-18 21:01
*/
Create  PROCEDURE ListPage(
@tblName 	nvarchar(200),		         ----要显示的表或多个表的连接
@fldName 	nvarchar(200) = '*',	         ----要显示的字段列表
@pageSize	int = 10,		                  ----每页显示的记录个数
@page		int = 1,		         ----要显示那一页的记录
@pageCount	int = 1 output,	         ----查询结果分页后的总页数
@Counts	int = 1 output,		         ----查询到的记录数
@fldSort	nvarchar(100) = null,	         ----排序字段列表或条件
@Sort		bit = 0,		         ----排序方法，0为升序，1为降序
@strCondition	nvarchar(200) = null,	----查询条件,不需where
@ID		nvarchar(50)		----主表的主键
)
AS
SET NOCOUNT ON
Declare @sqlTmp nvarchar(1000)		----存放动态生成的SQL语句
Declare @strTmp nvarchar(1000)		----存放取得查询结果总数的查询语句
Declare @strID	 nvarchar(1000)		----存放取得查询开头或结尾ID的查询语句
Declare @sqlSort nvarchar(200)		----存放临时生成的排序条件
Declare @intCounts int			----要移动的记录数
Declare @BeginID int			----开始的ID
Declare @EndID   int			----结束的ID



--------首先生成排序方法---------
if @Sort=0		--升序
begin
	  if not(@fldSort is null)
		set @sqlSort = ' Order by ' + @fldSort	
	  else
		set @sqlSort = ' Order by ' + @ID  
end
else			--降序
begin
	if not(@fldSort is null)
		set @sqlSort = ' Order by ' + @fldSort + ' DESC'		
	else
		set @sqlSort = ' Order by ' + @ID + ' DESC '
end


--------生成查询语句--------
--此处@strTmp为取得查询结果数量的语句
if @strCondition is null	--没有设置显示条件
	begin
	set @sqlTmp =  @fldName + ' From ' + @tblName
	set @strTmp = 'select @Counts=Count(' + @ID + ') FROM '+@tblName
	set @strID = ' From ' + @tblName
	end
else
	begin
	set @sqlTmp = + @fldName + 'From ' + @tblName + ' where ' + @strCondition
	set @strTmp = 'select @Counts=Count(' + @ID + ') FROM '+@tblName + ' where ' + @strCondition
	set @strID = ' From ' + @tblName + ' where ' + @strCondition
	end
	


----取得查询结果总数量-----
exec sp_executesql @strTmp,N'@Counts int out ',@Counts out

--取得分页总数
if @Counts <= @pageSize
	set @pageCount = 1
else
	set @pageCount = (@Counts / @pageSize) + 1


--计算要移动的记录数
if @page = 1 
	set @intCounts = @pageSize
else
begin
	set @intCounts = (@page-1) * @pageSize + 1
end

-----取得分页后此页的第一条记录的ID
set @strID = 'select @BeginID=' + @ID + ' ' + @strID



set @intCounts = @intCounts - @pageSize + 1
set rowcount  @intCounts
exec sp_executesql @strID,N'@BeginID int out ',@BeginID out

-----取得分页后此页的最后一条记录的ID
set @intCounts = @intCounts + @pageSize - 1
print @intCounts
set rowcount  @intCounts
exec sp_executesql @strID,N'@BeginID int out ',@EndID out


------恢复系统设置-----
set rowcount  0
SET NOCOUNT OFF

------返回查询结果-----
if @strCondition is null
	set @strTmp = 'select ' + @sqlTmp + ' where ' + @ID + ' between ' + str(@BeginID) + ' and ' + str(@EndID)
else
	set @strTmp = 'select ' + @sqlTmp + ' where ' + @ID +' (between ' + str(@BeginID) + ' and ' + str(@EndID) + ')  and ' + @strCondition

if not(@sqlSort is null)
set @strTmp = @strTmp + @sqlSort
exec sp_executesql @strTmp

GO

[liujiayu10]

楼主似乎不太相信自己的代码，看看别人的，都差不多的

[jlj84237485]

帮顶一下

[jzcldy]

namespace MyHC.BLL
{
public class Class_1
{
#region 增

/// <summary>
/// 创建一个一级分类
/// </summary>
/// <param name="ClassName">一级分类名称</param>
/// <returns></returns>
public int createClass_1(string ClassName)
{
StringBuilder sb = new StringBuilder();
sb.Append("insert into Class_1 ([ClassName]) values (@ClassName)");
SqlParameter[] param = { DBHelper.GetParameter("@ClassName", SqlDbType.NVarChar, 50, "[ClassName]", ClassName) };
return DBHelper.ExecuteSql(sb.ToString(), param);
}

#endregion

#region 删

/// <summary>
/// 删除一级分类
/// </summary>
/// <param name="Class_1">一级分类编号</param>
/// <returns></returns>
public int deleteClass_1(int Class_1)
{
StringBuilder sb = new StringBuilder();
sb.Append("delete from Class_1 where [ClassID_1]=@ClassID_1");
SqlParameter[] param = { DBHelper.GetParameter("@ClassID_1", SqlDbType.Int, 4, "[ClassID_1]", Class_1) };
return DBHelper.ExecuteSql(sb.ToString(), param);
}

#endregion

#region 改

/// <summary>
/// 更新一级分类
/// </summary>
/// <param name="Class_1">一级分类编号</param>
/// <param name="ClassName">一级分类名称</param>
/// <returns></returns>
public int updateClass_1(int Class_1, string ClassName)
{
StringBuilder sb = new StringBuilder();
sb.Append("update Class_1 set [ClassName]=@ClassName where [ClassID_1]=@ClassID_1");
SqlParameter[] param =
{
DBHelper.GetParameter("@ClassName", SqlDbType.NVarChar, 50, "[ClassName]", ClassName),
DBHelper.GetParameter("@ClassID_1", SqlDbType.Int, 4, "[ClassID_1]", Class_1)

};
return DBHelper.ExecuteSql(sb.ToString(), param);
}

#endregion

#region 查

/// <summary>
/// 按升序取得一级类型前n个.
/// </summary>
/// <param name="num"></param>
/// <returns></returns>
public DataTable toplist(int num)
{
StringBuilder sb = new StringBuilder();
sb.Append("select top " + num + " * from Class_1 order by ClassID_1");
return DBHelper.ExecuteDt(sb.ToString());
}
/// <summary>
/// 根据类型名称查询商品一级分类
/// </summary>
/// <param name="ClassName"></param>
/// <returns></returns>
public DataTable Class_1list(string ClassName)
{
List<SqlParameter> list = new List<SqlParameter>();
StringBuilder sb = new StringBuilder();
sb.Append("select [ClassID_1],[ClassName] from Class_1 where 1 = @index");

list.Add(DBHelper.GetParameter("@index", SqlDbType.Int, 1));
if (ClassName != "")
{
sb.Append(" and [ClassName] like '%' + @ClassName + '%'");
list.Add(DBHelper.GetParameter("@ClassName", SqlDbType.NVarChar, 50, "[ClassName]", ClassName));
}

return DBHelper.ExecuteDt(sb.ToString(), list.ToArray());
}

/// <summary>
/// 是否已经存在该分类
/// </summary>
/// <param name="ClassName"></param>
/// <returns></returns>
public bool IsExite(string ClassName)
{
StringBuilder sb = new StringBuilder();
sb.Append("select [ClassName] from Class_1 where [ClassName]=@ClassName");
SqlParameter[] param = { DBHelper.GetParameter("@ClassName", SqlDbType.NVarChar, 50, "[ClassName]", ClassName) };
DataTable table = DBHelper.ExecuteDt(sb.ToString(), param);
return table.Rows.Count > 0 ? true : false;
}

/// <summary>
/// 根据类型ID获得类型名称
/// </summary>
/// <param name="typeid"></param>
/// <returns></returns>
public string getClassName(int typeid)
{
StringBuilder sb = new StringBuilder();
sb.Append("select [ClassName] from Class_1 where [ClassID_1]=@ClassID_1");
SqlParameter[] param = { DBHelper.GetParameter("@ClassID_1", SqlDbType.Int, 4, "[ClassID_1]", typeid) };
DataTable table = DBHelper.ExecuteDt(sb.ToString(), param);
return table.Rows.Count > 0 ? table.Rows[0]["ClassName"].ToString() : " ";
}

#endregion
public Class_1()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
}
}

[zzxap]

百万级分页
http://topic.csdn.net/u/20090113/16/cac6480c-84ff-4ae3-8fa1-11cfa39fd8ea.html

[zzxap]

增删查改
http://download.csdn.net/source/409714

[zzxap]

http://search.download.csdn.net/search/增删查改

[zjybushiren88888]

51aspx. 很不错

多敲代码

[mailto520]

51aspx.com不错

[WizardWu]

ASP.NET 数据分页第四篇 - WizardGridView 威力加强版
http://www.cnblogs.com/WizardWu/archive/2008/09/28/1301616.html

[我在深圳搬砖-Justin]

增删改也就是执行一条Sql语句
Connection + Command 就可以了这个都没什么区别的

[wonder888888]

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Xml;
private XmlDocument xmlDoc;

//load xml file
private void LoadXml()
{
xmlDoc=new XmlDocument();
xmlDoc.Load(Server.MapPath("User.xml"));
}

//添加节点
private void AddElement()
{

LoadXml();

XmlNode xmldocSelect=xmlDoc.SelectSingleNode("user");

XmlElement el=xmlDoc.CreateElement("person"); //添加person节点
el.SetAttribute("name","风云"); //添加person节点的属性"name"
el.SetAttribute("sex","女"); //添加person节点的属性 "sex"
el.SetAttribute("age","25"); //添加person节点的属性 "age"

XmlElement xesub1=xmlDoc.CreateElement("pass"); //添加person节点的里的节点
xesub1.InnerText="123";//设置文本节点
el.AppendChild(xesub1);
XmlElement xesub2=xmlDoc.CreateElement("Address");
xesub2.InnerText="昆明";//设置文本节点
el.AppendChild(xesub2);

xmldocSelect.AppendChild(el);
xmlDoc.Save(Server.MapPath("user.xml"));

}



//修改节点
private void UpdateElement()
{
LoadXml();
XmlNodeList nodeList=xmlDoc.SelectSingleNode("user").ChildNodes;//获取bookstore节点的所有子节点
foreach(XmlNode xn in nodeList)//遍历所有子节点
{
XmlElement xe=(XmlElement)xn;//将子节点类型转换为XmlElement类型
if(xe.GetAttribute("name")=="风云")//如果name属性值为“风云”
{
xe.SetAttribute("name","发明");


//如果下面有子节点在下走
XmlNodeList nls=xe.ChildNodes;//继续获取xe子节点的所有子节点
foreach(XmlNode xn1 in nls)//遍历
{
XmlElement xe2=(XmlElement)xn1;//转换类型
if(xe2.Name=="pass")//如果找到
{
xe2.InnerText="66666";//则修改
break;

}
}

break;
}
}
xmlDoc.Save(Server.MapPath("user.xml"));//保存
}

//删出节点
private void deleteNode()
{

LoadXml();
XmlNodeList xnl=xmlDoc.SelectSingleNode("user").ChildNodes;

foreach(XmlNode xn in xnl)
{
XmlElement xe=(XmlElement)xn;

if(xe.GetAttribute("name")=="发明")
{
//xe.RemoveAttribute("name");//删除name属性
xe.RemoveAll();//删除该节点的全部内容


break;
}

}
xmlDoc.Save(Server.MapPath("user.xml"));//保存
}

private void showIt()
{
LoadXml();
XmlNode xn=xmlDoc.SelectSingleNode("user");

XmlNodeList xnl=xn.ChildNodes;

foreach(XmlNode xnf in xnl)
{
XmlElement xe=(XmlElement)xnf;
// Console.WriteLine(xe.GetAttribute("name"));//显示属性值
// Console.WriteLine(xe.GetAttribute("sex"));
//
// XmlNodeList xnf1=xe.ChildNodes;
// foreach(XmlNode xn2 in xnf1)
// {
// Console.WriteLine(xn2.InnerText);//显示子节点点文本
// }

}

}

[wonder888888]

可参考不错的书，推荐
http://download.csdn.net/source/1098370

[LarkBoy]

回帖是一种美德！