基于Jquery+Ajax+Json+存储过程 高效分页
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:100;} </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 = 0; 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 = 1; int.TryParse(pageIndex, out currentPageIndex); SqlParameter[] parms = new SqlParameter[] { new SqlParameter("@FEILDS",SqlDbType.NVarChar,1000), new SqlParameter("@PAGE_INDEX",SqlDbType.Int,10), new SqlParameter("@PAGE_SIZE",SqlDbType.Int,10), new SqlParameter("@ORDERTYPE",SqlDbType.Int,2), new SqlParameter("@ANDWHERE",SqlDbType.VarChar,1000), new SqlParameter("@ORDERFEILD",SqlDbType.VarChar,100) }; parms[0].Value = "id,name,sex,tel";//获取所有的字段 parms[1].Value = pageIndex;//当前页面索引 parms[2].Value = 20;//页面大小 parms[3].Value = 0;//升序排列 parms[4].Value = "";//条件语句 parms[5].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[0].ToString(), name = sdr[1].ToString(), sex = sdr[2].ToString(), tel = sdr[3].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[0].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 = 0, 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 == 0) { 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 == 0) { 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 < 1 || ds.Tables[0].Rows.Count < 1) { return null; } else { return ds.Tables[0]; } } 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 < 1 || ds.Tables[0].Rows.Count < 1) { return null; } else { return ds.Tables[0]; } } #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[0]; } } 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[0]; } } #endregion } }
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