操作类：
using System;
using System.Data;
using System.Text.RegularExpressions;
using System.Xml;
using System.IO;
using System.Collections;
using System.Data.SQLite;
using System.Configuration;//添加.net引用
namespace Tools.Common
{
/// <summary>
/// 对SQLite操作的类
/// 引用：System.Data.SQLite.dll【版本：3.6.23.1（原始文件名：SQlite3.DLL）】
/// </summary>
public class SQLiteHelper
{
/// <summary>
/// 所有成员函数都是静态的，构造函数定义为私有
/// </summary>
private SQLiteHelper()
{
}
/// <summary>
/// 连接字符串
/// </summary>
public static string ConnectionString
{//"Data Source=Test.db3;Pooling=true;FailIfMissing=false";
get
{
////(AppSettings节点下的"SQLiteConnectionString")
string text = ConfigurationManager.AppSettings["SQLiteConnectionString"];
string str2 = ConfigurationManager.AppSettings["IsEncrypt"];
if (str2 == "true")
{
text = DesEncrypt.Decrypt(text);
}
return text;
}
}
private static SQLiteConnection _Conn = null;
/// <summary>
/// 连接对象
/// </summary>
public static SQLiteConnection Conn
{
get
{
if (_Conn == null) _Conn = new SQLiteConnection(ConnectionString);
return SQLiteHelper._Conn;
}
set { SQLiteHelper._Conn = value; }
}
#region CreateCommand(commandText,SQLiteParameter[])
/// <summary>
/// 创建命令
/// </summary>
/// <param name="connection">连接</param>
/// <param name="commandText">语句</param>
/// <param name="commandParameters">语句参数.</param>
/// <returns>SQLite Command</returns>
public static SQLiteCommand CreateCommand(string commandText, params SQLiteParameter[] commandParameters)
{
SQLiteCommand cmd = new SQLiteCommand(commandText, Conn);
if (commandParameters.Length > 0)
{
foreach (SQLiteParameter parm in commandParameters)
cmd.Parameters.Add(parm);
}
return cmd;
}
#endregion
#region CreateParameter(parameterName,parameterType,parameterValue)
/// <summary>
/// 创建参数
/// </summary>
/// <param name="parameterName">参数名</param>
/// <param name="parameterType">参数类型</param>
/// <param name="parameterValue">参数值</param>
/// <returns>返回创建的参数</returns>
public static SQLiteParameter CreateParameter(string parameterName, System.Data.DbType parameterType, object parameterValue)
{
SQLiteParameter parameter = new SQLiteParameter();
parameter.DbType = parameterType;
parameter.ParameterName = parameterName;
parameter.Value = parameterValue;
return parameter;
}
#endregion
#region ExecuteDataSet(commandText,paramList[])
/// <summary>
/// 查询数据集
/// </summary>
/// <param name="cn">连接.</param>
/// <param name="commandText">查询语句.</param>
/// <param name="paramList">object参数列表.</param>
/// <returns></returns>
public static DataSet ExecuteDataSet( string commandText,params object[] paramList)
{
SQLiteCommand cmd = Conn.CreateCommand();
cmd.CommandText = commandText;
if (paramList != null)
{
AttachParameters(cmd, commandText, paramList);
}
DataSet ds = new DataSet();
if (Conn.State == ConnectionState.Closed)
Conn.Open();
SQLiteDataAdapter da = new SQLiteDataAdapter(cmd);
da.Fill(ds);
da.Dispose();
cmd.Dispose();
Conn.Close();
return ds;
}
#endregion
#region ExecuteDataSet(SQLiteCommand)
/// <summary>
/// 查询数据集
/// </summary>
/// <param name="cmd">SQLiteCommand对象</param>
/// <returns>返回数据集</returns>
public static DataSet ExecuteDataSet(SQLiteCommand cmd)
{
if (cmd.Connection.State == ConnectionState.Closed)
cmd.Connection.Open();
DataSet ds = new DataSet();
SQLiteDataAdapter da = new SQLiteDataAdapter(cmd);
da.Fill(ds);
da.Dispose();
cmd.Connection.Close();
cmd.Dispose();
return ds;
}
#endregion
#region ExecuteDataSet(SQLiteTransaction,commandText,params SQLiteParameter[])
/// <summary>
/// 查询数据集
/// </summary>
/// <param name="transaction">SQLiteTransaction对象. </param>
/// <param name="commandText">查询语句.</param>
/// <param name="commandParameters">命令的参数列表.</param>
/// <returns>DataSet</returns>
/// <remarks>必须手动执行关闭连接transaction.connection.Close</remarks>
public static DataSet ExecuteDataSet(SQLiteTransaction transaction, string commandText, params SQLiteParameter[] commandParameters)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rolled back or committed, please provide an open transaction.", "transaction");
IDbCommand cmd = transaction.Connection.CreateCommand();
cmd.CommandText = commandText;
foreach (SQLiteParameter parm in commandParameters)
{
cmd.Parameters.Add(parm);
}
if (transaction.Connection.State == ConnectionState.Closed)
transaction.Connection.Open();
DataSet ds = ExecuteDataSet((SQLiteCommand)cmd);
return ds;
}
#endregion
#region ExecuteDataSet(SQLiteTransaction,commandText,object[] commandParameters)
/// <summary>
/// 查询数据集
/// </summary>
/// <param name="transaction">SQ