using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient;// using System.Collections;// /// <summary> /// SQLHelper 的摘要说明 /// </summary> public class SQLHelper { public SQLHelper() { // // TODO: 在此处添加构造函数逻辑 // } private static SqlCommand command = new SqlCommand();// private static SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]); static SQLHelper() { command.Connection = conn; } /// <summary> /// 打开数据库连接 /// </summary> private static void OpenConnect() { if (conn.State == ConnectionState.Open) { conn.Close(); } conn.Open(); } /// <summary> /// 关闭数据库连接 /// </summary> public static void CloseConnect() { if (conn.State != ConnectionState.Closed) { conn.Close(); } } /// <summary> /// /// </summary> /// <param name="procName"></param> /// <param name="prams"></param> /// <returns></returns> private static SqlCommand CreateCommand(string procName, SqlParameter[] prams) { OpenConnect();//打开DB连接 SqlCommand command = new SqlCommand(procName, conn); command.CommandType = CommandType.StoredProcedure; if (prams != null) { foreach (SqlParameter parameter in prams) { command.Parameters.Add(parameter); } } command.Parameters.Add(new SqlParameter("ReturnValue", SqlDbType.Int, 4, ParameterDirection.ReturnValue, false, 0, 0, string.Empty, DataRowVersion.Default, null)); return command; } /// <summary> /// 执行sql命令语句 /// </summary> /// <param name="sql">传入要执行的sql语句</param> public static void ExecuteSql(string sql) { OpenConnect();//打开连接 command.CommandType = CommandType.Text; command.CommandText = sql; command.ExecuteNonQuery(); CloseConnect();//关闭连接 } /// <summary> /// 返回一个DataTable对象 /// </summary> /// <param name="sql">要执行的SQL命令语句</param> /// <returns>返回一的DataTable对象</returns> public static DataTable GetDataTable(string sql) { DataSet dataSet = new DataSet(); OpenConnect();//打开DB连接 SqlDataAdapter adapter = new SqlDataAdapter(); adapter.SelectCommand = command; command.CommandText = sql; command.CommandType = CommandType.Text; adapter.Fill(dataSet); CloseConnect();//关闭DB连接 return dataSet.Tables[0]; } /// <summary> /// 返回一的DataTable对象 /// </summary> /// <param name="sql">要执行的SQL命令语句</param> /// <param name="pageinfo">第几页</param> /// <param name="pagesize">每页显示数据项数</param> /// <param name="name"></param> /// <returns>返回一的DataTable对象</returns> public static DataTable GetDataTable(string sql, int pageinfo, int pagesize, string name) { DataSet dataSet = new DataSet(); OpenConnect(); SqlDataAdapter adapter = new SqlDataAdapter(); adapter.SelectCommand = command; command.CommandText = sql; command.CommandType = CommandType.Text; adapter.Fill(dataSet, pageinfo, pagesize, name); CloseConnect(); return dataSet.Tables[0]; } /// <summary> /// 返回第一行的第一列的值 /// </summary> /// <param name="sql">要执行的SQL命令语句</param> /// <returns>字符串形式返回查询结果第一行的第一列的值</returns> public static string GetFirstColumnValue(string sql) { OpenConnect(); command.CommandType = CommandType.Text; command.CommandText = sql; object obj2 = command.ExecuteScalar(); CloseConnect(); if (obj2 == null) { return ""; } return obj2.ToString(); } /// <summary> /// 返回一个SqlDataReader对象 /// </summary> /// <param name="sql">要执行的SQL命令语句</param> /// <returns></returns> public static SqlDataReader GetReader(string sql) { OpenConnect(); command.CommandType = CommandType.Text; command.CommandText = sql; return command.ExecuteReader(CommandBehavior.CloseConnection);//若关闭DataReader对象则关联的Connection对象也将关闭 } /// <summary> /// 返回一个bool值判断Reader对象是否存在行 /// </summary> /// <param name="sql">要执行的SQL命令语句</param> /// <returns>返回一个bool值判断Reader对象是否存在行</returns> public static bool IsHasRow(string sql) { OpenConnect(); command.CommandType = CommandType.Text; command.CommandText = sql; bool flag = command.ExecuteReader().Read(); CloseConnect(); return flag; } public static DataSet RunProc(string procName, SqlParameter[] prams) { DataSet dataSet = new DataSet(); OpenConnect(); SqlDataAdapter adapter = new SqlDataAdapter(); adapter.SelectCommand = CreateCommand(procName, prams); adapter.Fill(dataSet); CloseConnect(); return dataSet; } public static void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader) { dataReader = CreateCommand(procName, prams).ExecuteReader(CommandBehavior.CloseConnection); } public static void RunProcNon(string procName, SqlParameter[] prams) { OpenConnect(); CreateCommand(procName, prams).ExecuteNonQuery(); CloseConnect(); } public static void RunProcNonQuery(string procName, SqlParameter[] prams) { CreateCommand(procName, prams).ExecuteNonQuery(); } public static DataTable RunProcT(string procName, SqlParameter[] prams) { DataSet dataSet = new DataSet(); OpenConnect(); SqlDataAdapter adapter = new SqlDataAdapter(); adapter.SelectCommand = CreateCommand(procName, prams); adapter.Fill(dataSet); CloseConnect(); return dataSet.Tables[0]; } //-------------------------------------------------------------------------------------------------------------- public static void ExecuteSqlWithIdentityTrans(ArrayList sqls) { string newValue = null; string str2 = ""; SqlTransaction transaction = null; try { OpenConnect();//打开连接 transaction = conn.BeginTransaction();//开始数据库事务 command.Transaction = transaction; foreach (string str3 in sqls) { str2 = str3; if (newValue != null) { str2 = str3.Replace("IdenStr", newValue); } command.CommandType = CommandType.Text; command.CommandText = str2; if (str3.IndexOf("Idenity") != -1) { newValue = command.ExecuteScalar().ToString(); continue; } command.ExecuteNonQuery(); } transaction.Commit();//提交数据库事务 } catch (Exception exception) { transaction.Rollback();//回滚事务 throw exception; } finally { CloseConnect();//关闭连接 } } public static void ExecuteSqlWithTrans(ArrayList sqls) { SqlTransaction transaction = null; try { OpenConnect(); transaction = conn.BeginTransaction(); command.Transaction = transaction; foreach (string str in sqls) { command.CommandType = CommandType.Text; command.CommandText = str; command.ExecuteNonQuery(); } transaction.Commit(); } catch (Exception exception) { transaction.Rollback(); throw exception; } finally { CloseConnect(); } } public static SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value) { return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value); } public static SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size) { return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null); } public static SqlParameter MakeParam(string ParamName, SqlDbType DbType, int Size, ParameterDirection Direction, object Value) { SqlParameter parameter; if (Size > 0) { parameter = new SqlParameter(ParamName, DbType, Size); } else { parameter = new SqlParameter(ParamName, DbType); } parameter.Direction = Direction; if ((Direction != ParameterDirection.Output) || (Value != null)) { parameter.Value = Value; } return parameter; } public static SqlParameter MakeReturnParam(string ParamName, SqlDbType DbType, int Size) { return MakeParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null); } }
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;//
using System.Collections;//
/// <summary>
/// SQLHelper 的摘要说明
/// </summary>
public class SQLHelper
{
public SQLHelper()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
private static SqlCommand command = new SqlCommand();//
private static SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
static SQLHelper()
{
command.Connection = conn;
/// <summary>
/// 打开数据库连接
/// </summary>
private static void OpenConnect()
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
conn.Open();
}
/// <summary>
/// 关闭数据库连接
/// </summary>
public static void CloseConnect()
{
if (conn.State != ConnectionState.Closed)
{
conn.Close();
}
}
/// <summary>
///
/// </summary>
/// <param name="procName"></param>
/// <param name="prams"></param>
/// <returns></returns>
private static SqlCommand CreateCommand(string procName, SqlParameter[] prams)
{
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