在做后台开发中，都会有大量的列表展示，下面给大家给大家分享一套基于Jquery+Ajax+Json+存储过程高效分页列表，只需要传递几个参数即可。当然代码也有改进的地方，如果大家有更好的方法，愿留下宝贵的建议或意见！好了，上代码
存储过程
CREATE PROCEDURE [dbo].[PAGINATION]
@FEILDS VARCHAR(1000),--要显示的字段
@PAGE_INDEX INT,--当前页码
@PAGE_SIZE INT,--页面大小
@ORDERTYPE BIT,--当为0时 则为 desc 当为1 时 asc
@ANDWHERE VARCHAR(1000)='',--where语句 不用加where
@ORDERFEILD VARCHAR(100), --排序的字段
@TableName VARCHAR(100) --查询表名 as
DECLARE @EXECSQL VARCHAR(2000)
DECLARE @ORDERSTR VARCHAR(100)
DECLARE @ORDERBY VARCHAR(100)
BEGIN
set NOCOUNT on
IF @ORDERTYPE = 1
BEGIN
SET @ORDERSTR = ' > ( SELECT MAX(['+@ORDERFEILD+'])'
SET @ORDERBY = 'ORDER BY '+@ORDERFEILD+' ASC'
END
ELSE
BEGIN
SET @ORDERSTR = ' < ( SELECT MIN(['+@ORDERFEILD+'])'
SET @ORDERBY = 'ORDER BY '+@ORDERFEILD+' DESC'
END
IF @PAGE_INDEX = 1 --当页码是第一页时直接运行，提高速度
BEGIN
IF @ANDWHERE=''
SET @EXECSQL = 'SELECT TOP '+STR(@PAGE_SIZE)+' '+@FEILDS+' FROM '+@TableName+' '+@ORDERBY
ELSE
SET @EXECSQL = 'SELECT TOP '+STR(@PAGE_SIZE)+' '+@FEILDS+' FROM '+@TableName+' WHERE '+@ANDWHERE+' '+ @ORDERBY
END
ELSE
BEGIN
IF @ANDWHERE=''
BEGIN --以子查询结果当做新表时 要给表名别名才能用
SET @EXECSQL = 'SELECT TOP'+STR(@PAGE_SIZE)+' '+@FEILDS+' FROM '+@TableName+' WHERE '+@ORDERFEILD+
@ORDERSTR+' FROM (SELECT TOP '+STR(@PAGE_SIZE*(@PAGE_INDEX-1))+' '+@ORDERFEILD+
' FROM '+@TableName+' '+@ORDERBY+') AS TEMP) '+ @ORDERBY
END
ELSE
BEGIN
SET @EXECSQL = 'SELECT TOP'+STR(@PAGE_SIZE)+' '+@FEILDS+' FROM '+@TableName+' WHERE '+@ORDERFEILD+
@ORDERSTR+' FROM (SELECT TOP '+ STR(@PAGE_SIZE*(@PAGE_INDEX-1))+' '+@ORDERFEILD+
' FROM '+@TableName+' WHERE '+@ANDWHERE+' '+@ORDERBY+') AS TEMP) AND '+@ANDWHERE+' '+ @ORDERBY
END
END
EXEC (@EXECSQL)--这里要加括号
END
样式：
<style type="text/css">
a,area { -moz-outline-style: none; blr:expression(this.onFocus=this.blur()); text-decoration:none}
div.badoo { padding:20px; text-align:center; }
div.badoo a { border:1px solid #ededed; padding:10px 13px; color:#333333; border-radius:2px; margin-right:3px;}
div.badoo a:hover {border:1px solid #ff5a00; color: #ff5a00; }
div.badoo a:active {border:1px solid #ff5a00; margin-right:3px;}
div.badoo span { border:1px solid #EDEDED; padding:10px 13px; color:#f00;font-weight:bold; background:#FAFAFA; border-radius:2px; margin-right:3px;}
div.badoo span.disabled { border:1px solid #EDEDED; padding:10px 13px; color:#000; margin-right:3px; font-weight:;}
</style>
JS代码
<script type="text/javascript">
$(function () {
$.post("GetData.ashx", null, function (data) {
var total = data;
PageClick(1, total, 2);
});
PageClick = function (pageIndex, total, spanInterval) {
$.ajax({
url: "GetData.ashx",
data: { "PageIndex": pageIndex },
type: "post",
dataType: "json",
success: function (data) {
//索引从1开始
//将当前页索引转为int类型
var intPageIndex = parseInt(pageIndex);
//获取显示数据的表格
var table = $("#content");
//清楚表格中内容
$("#content tr").remove();
//向表格中添加内容
for (var i = 0; i < data.length; i++) {
table.append(
$("<tr><td>" +
data[i].id
+ "</td><td>" +
data[i].name
+ "</td><td>" +
data[i].sex
+ "</td><td>" +
data[i].tel
+ "</td></tr>")
);
} //for
//创建分页
//将总记录数结果 得到 总页码数
var pageS = total
if (pageS % 10 == 0) pageS = pageS / 20;
else pageS = parseInt(total / 20) + 1;
var $pager = $("#pager");
//清楚分页div中的内容
$("#pager span").remove();
$("#pager a").remove();
//添加第一页
if (intPageIndex == 1) {
// $pager.append("<span class='disabled'>第一页</span>");
}
else {
// var first = $("<a href='javascript:void(0)' first='" + 1 + "'>第一页</a>").click(function () {
// PageClick($(this).attr('first'), total, spanInterval);
// return false;
// });
// $pager.append(first);
}
//添加上一页
if (intPageIndex == 1)
$pager.append("<span class='disabled'>上一页</span>");
else {
var pre = $("<a href='javascript:void(0)' pre='" + (intPageIndex - 1) + "'>上一页</a>").click(function () {
PageClick($(this).attr('pre'), total, spanInterval);
return false;
});
$pager.append(pre);
}
//设置分页的格式 这里可以根据需求完成自己想要的结果
var interval = parseInt(spanInterval); //设置间隔
var start = Math.max(1, intPageIndex - interval); //设置起始页
var end = Math.min(intPageIndex + interval, pageS)//设置末页
if (intPageIndex < interval + 1) {
end = (2 * interval + 1) > pageS ? pageS : (2 * interval + 1);
}
if ((intPageIndex + interval) > pageS) {
start = (pageS - 2 * interval) < 1 ? 1 : (pageS - 2 * interval);
}
//生成页码
for (var j = start; j < end + 1; j++) {
if (j == intPageIndex) {
var spanSelectd = $("<span class='current'>" + j + "</span>");
$pager.append(spanSelectd);
} //if
else {
var a = $("<a href='javascript:void(0)'>" + j + "</a>").click(function () {
PageClick($(this).text(), total, spanInterval);
return false;
});
$pager.append(a);
} //else
} //for
//上一页
if (intPageIndex == Math.ceil(total / 20)) {
$pager.append("<span class='disabled'>下一页</span>");
}
else {
var next = $("<a href='javascript:void(0)' next='" + (intPageIndex + 1) + "'>下一页</a>").click(function () {
PageClick($(this).attr("next"), total, spanInterval);
return false;
});
$pager.append(next);
}
//最后一页
if (intPageIndex == pageS) {
// $pager.append("<span class='disabled'>最后一页</span>");
}
else {
// var last = $("<a href='javascript:void(0)' last='" + pageS + "'>最后一页</a>").click(function () {
// PageClick($(this).attr("last"), total, spanInterval);
// return false;
// });
// $pager.append(last);
}
} //sucess
}); //ajax
}; //function
}); //ready
</script>
Html代码
<table id="content">
</table>
<div id="pager" class="badoo"></div>
.Net后台代码
using System;
using System.Web;
using System.Data.SqlClient;
using System.Data;
using System.Collections.Generic;
using System.Web.Script.Serialization;
using Model; context.Response.ContentType = "text/plain";
var pageIndex = context.Request["PageIndex"];
//判断当前索引存不存在，如果不存在则获取记录的总数。
if (string.IsNullOrEmpty(pageIndex))
{
//获取查询记录总数的sql语句 int count = ;
int.TryParse(new BLL.t_profit().SelectAllNum(), out count);
context.Response.Write(count);
context.Response.End();
}
//当根据索引获取数据
else
{
int currentPageIndex = ;
int.TryParse(pageIndex, out currentPageIndex);
SqlParameter[] parms = new SqlParameter[] {
new SqlParameter("@FEILDS",SqlDbType.NVarChar,),
new SqlParameter("@PAGE_INDEX",SqlDbType.Int,),
new SqlParameter("@PAGE_SIZE",SqlDbType.Int,),
new SqlParameter("@ORDERTYPE",SqlDbType.Int,),
new SqlParameter("@ANDWHERE",SqlDbType.VarChar,),
new SqlParameter("@ORDERFEILD",SqlDbType.VarChar,)
};
parms[].Value = "id,name,sex,tel";//获取所有的字段
parms[].Value = pageIndex;//当前页面索引
parms[].Value = ;//页面大小
parms[].Value = ;//升序排列
parms[].Value = "";//条件语句
parms[].Value = "id";//排序字段
List<Book> list = new List<Book>(); using (SqlDataReader sdr = Yoodor.DAL.SqlHelper.ExecuteReader(CommandType.StoredProcedure, "PAGINATION", parms))
{
while (sdr.Read())
{
list.Add(new Book { id = sdr[].ToString(), name = sdr[].ToString(), sex = sdr[].ToString(), tel = sdr[].ToString() });
}
}
context.Response.Write(new JavaScriptSerializer().Serialize(list).ToString());//转为Json格式
} public string id { get; set; }
public string name { get; set; }
public string sex { get; set; }
public string tel { get; set; }
DAL.SqlHelper
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace Yoodor.DAL
{
public class SqlHelper
{
/// <summary>
/// 数据库连接字符串
/// </summary>
public static string connectionString = ConfigurationManager.ConnectionStrings["Supermarket_DB"].ConnectionString;
// Hashtable to store cached parameters
private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
#region//ExecteNonQuery方法
/// <summary>
///执行一个不需要返回值的SqlCommand命令，通过指定专用的连接字符串。
/// 使用参数数组形式提供参数列表
/// </summary>
/// <param name="connectionString">一个有效的数据库连接字符串</param>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
public static int ExecteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(connectionString))
{
//通过PrePareCommand方法将参数逐个加入到SqlCommand的参数集合中
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
//清空SqlCommand中的参数列表
cmd.Parameters.Clear();
return val;
}
}
/// <summary>
///执行一个不需要返回值的SqlCommand命令，通过指定专用的连接字符串。
/// 使用参数数组形式提供参数列表
/// </summary>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
public static int ExecteNonQuery(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
return ExecteNonQuery(connectionString, cmdType, cmdText, commandParameters);
}
/// <summary>
///存储过程专用
/// </summary>
/// <param name="cmdText">存储过程的名字</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
public static int ExecteNonQueryProc(string cmdText, params SqlParameter[] commandParameters)
{
return ExecteNonQuery(CommandType.StoredProcedure, cmdText, commandParameters);
}
/// <summary>
///Sql语句专用
/// </summary>
/// <param name="cmdText">T_Sql语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
public static int ExecteNonQueryText(string cmdText, params SqlParameter[] commandParameters)
{
return ExecteNonQuery(CommandType.Text, cmdText, commandParameters);
}
#endregion
#region//GetTable方法
/// <summary>
/// 执行一条返回结果集的SqlCommand，通过一个已经存在的数据库连接
/// 使用参数数组提供参数
/// </summary>
/// <param name="connecttionString">一个现有的数据库连接</param>
/// <param name="cmdTye">SqlCommand命令类型</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个表集合(DataTableCollection)表示查询得到的数据集</returns>
public static DataTableCollection GetTable(string connecttionString, CommandType cmdTye, string cmdText, SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
DataSet ds = new DataSet();
using (SqlConnection conn = new SqlConnection(connecttionString))
{
PrepareCommand(cmd, conn, null, cmdTye, cmdText, commandParameters);
SqlDataAdapter adapter = new SqlDataAdapter();
adapter.SelectCommand = cmd;
adapter.Fill(ds);
}
DataTableCollection table = ds.Tables;
return table;
}
/// <summary>
/// 执行一条返回结果集的SqlCommand，通过一个已经存在的数据库连接
/// 使用参数数组提供参数
/// </summary>
/// <param name="cmdTye">SqlCommand命令类型</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个表集合(DataTableCollection)表示查询得到的数据集</returns>
public static DataTableCollection GetTable(CommandType cmdTye, string cmdText, SqlParameter[] commandParameters)
{
return GetTable(cmdTye, cmdText, commandParameters);
} /// <summary>
/// 存储过程专用
/// </summary>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个表集合(DataTableCollection)表示查询得到的数据集</returns>
public static DataTableCollection GetTableProc(string cmdText, SqlParameter[] commandParameters)
{
return GetTable(CommandType.StoredProcedure, cmdText, commandParameters);
}
/// <summary>
/// Sql语句专用
/// </summary>
/// <param name="cmdText"> T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个表集合(DataTableCollection)表示查询得到的数据集</returns>
public static DataTableCollection GetTableText(string cmdText, SqlParameter[] commandParameters)
{
return GetTable(CommandType.Text, cmdText, commandParameters);
}
#endregion /// <summary>
/// 为执行命令准备参数
/// </summary>
/// <param name="cmd">SqlCommand 命令</param>
/// <param name="conn">已经存在的数据库连接</param>
/// <param name="trans">数据库事物处理</param>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">Command text，T-SQL语句 例如 Select * from Products</param>
/// <param name="cmdParms">返回带参数的命令</param>
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
{
//判断数据库连接状态
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
//判断是否需要事物处理
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
/// <summary>
/// Execute a SqlCommand that returns a resultset against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <param name="connectionString">一个有效的数据库连接字符串</param>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>A SqlDataReader containing the results</returns>
public static SqlDataReader ExecuteReader( CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connectionString);
// we use a try/catch here because if the method throws an exception we want to
// close the connection throw code, because no datareader will exist, hence the
// commandBehaviour.CloseConnection will not work
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch (Exception ex)
{
conn.Close();
throw new Exception(ex.Message);
}
}
#region//ExecuteDataSet方法
/// <summary>
/// 执行指定事务的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">事务</param>
/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
/// <param name="commandText">存储过程名或T-SQL语句</param>
/// <returns>返回一个包含结果集的DataSet</returns>
public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText)
{
return ExecuteDataSet(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// return a dataset
/// </summary>
/// <param name="connectionString">一个有效的数据库连接字符串</param>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>return a dataset</returns>
public static DataSet ExecuteDataSet(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlConnection conn = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
SqlDataAdapter da = new SqlDataAdapter();
DataSet ds = new DataSet();
da.SelectCommand = cmd;
da.Fill(ds);
return ds;
}
catch (Exception ex)
{
//conn.Close(); //改动2013.7.42 16:32
throw new Exception(ex.Message);
}
finally
{
if (conn.State == ConnectionState.Open)
conn.Close();
}
} /// <summary>
/// 返回一个DataSet
/// </summary>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>return a dataset</returns>
public static DataSet ExecuteDataSet(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
return ExecuteDataSet(connectionString, cmdType, cmdText, commandParameters);
}
/// <summary>
/// 返回一个DataSet
/// </summary>
/// <param name="cmdText">存储过程的名字</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>return a dataset</returns>
public static DataSet ExecuteDataSetProducts(string cmdText, params SqlParameter[] commandParameters)
{
return ExecuteDataSet(connectionString, CommandType.StoredProcedure, cmdText, commandParameters);
}
/// <summary>
/// 返回一个DataSet
/// </summary>
/// <param name="cmdText">T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>return a dataset</returns>
public static DataSet ExecuteDataSetText(string cmdText, params SqlParameter[] commandParameters)
{
return ExecuteDataSet(connectionString, CommandType.Text, cmdText, commandParameters);
} public static DataView ExecuteDataSet(string connectionString, string sortExpression, string direction, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlConnection conn = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
SqlDataAdapter da = new SqlDataAdapter();
DataSet ds = new DataSet();
da.SelectCommand = cmd;
da.Fill(ds);
DataView dv = ds.Tables[].DefaultView;
dv.Sort = sortExpression + " " + direction;
return dv;
}
catch (Exception ex)
{
//conn.Close(); //改动2013.7.42 16:32
throw new Exception(ex.Message);
}
finally
{
if (conn.State == ConnectionState.Open)
conn.Close();
}
}
#endregion #region // ExecuteScalar方法 /// <summary>
/// 返回第一行的第一列
/// </summary>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个对象</returns>
public static object ExecuteScalar(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
return ExecuteScalar(SqlHelper.connectionString, cmdType, cmdText, commandParameters);
}
/// <summary>
/// 返回第一行的第一列存储过程专用
/// </summary>
/// <param name="cmdText">存储过程的名字</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个对象</returns>
public static object ExecuteScalarProducts(string cmdText, params SqlParameter[] commandParameters)
{
return ExecuteScalar(SqlHelper.connectionString, CommandType.StoredProcedure, cmdText, commandParameters);
}
/// <summary>
/// 返回第一行的第一列Sql语句专用
/// </summary>
/// <param name="cmdText">者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个对象</returns>
public static object ExecuteScalarText(string cmdText, params SqlParameter[] commandParameters)
{
return ExecuteScalar(SqlHelper.connectionString, CommandType.Text, cmdText, commandParameters);
}
/// <summary>
/// Execute a SqlCommand that returns the first column of the first record against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一个有效的数据库连接字符串</param>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection connection = new SqlConnection(connectionString))
{
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
}
/// <summary>
/// Execute a SqlCommand that returns the first column of the first record against an existing database connection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一个有效的数据库连接字符串</param>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
#endregion /// <summary>
/// add parameter array to the cache
/// </summary>
/// <param name="cacheKey">Key to the parameter cache</param>
/// <param name="cmdParms">an array of SqlParamters to be cached</param>
public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters)
{
parmCache[cacheKey] = commandParameters;
}
/// <summary>
/// Retrieve cached parameters
/// </summary>
/// <param name="cacheKey">key used to lookup parameters</param>
/// <returns>Cached SqlParamters array</returns>
public static SqlParameter[] GetCachedParameters(string cacheKey)
{
SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];
if (cachedParms == null)
return null;
SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
for (int i = , j = cachedParms.Length; i < j; i++)
clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();
return clonedParms;
} /// <summary>
/// 检查是否存在
/// </summary>
/// <param name="strSql">Sql语句</param>
/// <returns>bool结果</returns>
public static bool Exists(string strSql)
{
int cmdresult = Convert.ToInt32(ExecuteScalar(connectionString, CommandType.Text, strSql, null));
if (cmdresult == )
{
return false;
}
else
{
return true;
}
}
/// <summary>
/// 检查是否存在
/// </summary>
/// <param name="strSql">Sql语句</param>
/// <param name="cmdParms">参数</param>
/// <returns>bool结果</returns>
public static bool Exists(string strSql, params SqlParameter[] cmdParms)
{
int cmdresult = Convert.ToInt32(ExecuteScalar(connectionString, CommandType.Text, strSql, cmdParms));
if (cmdresult == )
{
return false;
}
else
{
return true;
}
}
#region ExecuteDataTable方法
public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText)
{
DataSet ds = ExecuteDataset(connectionString, commandType, commandText);
if (ds == null || ds.Tables.Count < || ds.Tables[].Rows.Count < )
{
return null;
}
else
{
return ds.Tables[];
}
}
public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
DataSet ds = ExecuteDataSet(connectionString, commandType, commandText, commandParameters);
if (ds == null || ds.Tables.Count < || ds.Tables[].Rows.Count < )
{
return null;
}
else
{
return ds.Tables[];
}
}
#endregion
#region ExecuteDataRow 方法
public static DataRow ExecuteDataRow(string connectionString, CommandType commandType, string commandText)
{
DataTable dt = ExecuteDataTable(connectionString, commandType, commandText);
if (dt == null)
{
return null;
}
else
{
return dt.Rows[];
}
}
public static DataRow ExecuteDataRow(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
DataTable dt = ExecuteDataTable(connectionString, commandType, commandText, commandParameters);
if (dt == null)
{
return null;
}
else
{
return dt.Rows[];
}
}
#endregion
}
}