实例介绍
【实例简介】
【实例截图】
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Data.Odbc;
using System.Data.OleDb;
using System.Data.OracleClient;
using System.Data.SqlClient;
using System.Data.SQLite;
using MySql.Data.MySqlClient;
using System.Text;
namespace SXLibrary
{
public enum DBType
{
/// <summary>
/// SQL Server数据库
/// </summary>
SQLServer,
/// <summary>
/// Access类型数据库 string conStr = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=E:\数据库\XiaoZhen.mdb;"
/// </summary>
OleDb,
/// <summary>
/// ODBC数据源 string conStr = "DSN=XXX;uid=sa;pwd=sa;"
/// </summary>
ODBC,
/// <summary>
/// Oracle数据库
/// </summary>
Oracle,
/// <summary>
/// MySQL
/// </summary>
MySQL,
/// <summary>
/// SQLite Data Source={0};Pooling=true; FailIfMissing=false；
/// </summary>
SQLite
}
/// <summary>
/// 2014年4月22日18:22:28 思信软件 崔
/// 通用数据库访问类 DBHelper类，
/// 支持SQL Server、OleDb、ODBC、Oracle、MySQL、SQLite等
/// 不同类型的数据源
/// </summary>
public class DBHelper : IDisposable
{
/// <summary>
/// 该枚举类型用于枚举数据库的类型
/// </summary>
#region 初始化数据库工厂
private DBType _DatabaseType = DBType.SQLServer;
private DbProviderFactory provider = null;
/// <summary>
/// 获取数据库类型属性
/// </summary>
public DBType DatabaseType
{
get { return _DatabaseType; }
}
private string _ConnectionString = "";
/// <summary>
/// 获取数据库连接字符串属性
/// </summary>
public string ConnectionString
{
get { return _ConnectionString; }
}
/// <summary>
/// 构造函数，默认数据库是SQL Server
/// </summary>
public DBHelper(string ConString)
{
this._DatabaseType = DBType.SQLServer;
this._ConnectionString = ConString;
GetProvider();
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="ConString">数据库连接字符串</param>
/// <param name="DbType">访问的数据库类型</param>
public DBHelper(string ConString, DBType DbType)
{
this._DatabaseType = DbType;
this._ConnectionString = ConString;
GetProvider();
}
/// <summary>
/// 根据数据库类型获取数据库实例
/// </summary>
/// <returns></returns>
private void GetProvider()
{
switch (this.DatabaseType)
{
case DBType.SQLServer:
provider = SqlClientFactory.Instance;
break;
case DBType.OleDb:
provider = OleDbFactory.Instance;
break;
case DBType.ODBC:
provider = OdbcFactory.Instance;
break;
case DBType.Oracle:
provider = OracleClientFactory.Instance;
break;
case DBType.MySQL:
provider = MySqlClientFactory.Instance;
break;
case DBType.SQLite:
provider = SQLiteFactory.Instance;
break;
default:
provider = SqlClientFactory.Instance;
break;
}
}
#endregion
#region ExecuteNonQuery
/// <summary>
/// 执行SQL语句并返回受影响的行的数目
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <returns>受影响的行的数目</returns>
public int ExecuteNonQuery(string cmdText)
{
return ExecuteNonQuery(cmdText, CommandType.Text, null);
}
/// <summary>
/// 执行SQL语句并返回受影响的行的数目
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <returns>受影响的行的数目</returns>
public int ExecuteNonQuery(string cmdText, CommandType cmdType)
{
return ExecuteNonQuery(cmdText, cmdType, null);
}
/// <summary>
/// 执行SQL语句并返回受影响的行的数目
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="ParametersList">参数</param>
/// <returns>受影响的行的数目</returns>
public int ExecuteNonQuery(string cmdText, Dictionary<string, object> ParametersList)
{
return ExecuteNonQuery(cmdText, CommandType.Text, ParametersList);
}
/// <summary>
/// 执行SQL语句并返回受影响的行的数目
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <param name="ParametersList">参数</param>
/// <returns>受影响的行的数目</returns>
public int ExecuteNonQuery(string cmdText, CommandType cmdType, Dictionary<string, object> ParametersList)
{
int val = -1;
using (DbConnection conn = provider.CreateConnection())
{
var cmd = conn.CreateCommand();
PrepareCommand(conn, cmd, cmdText, cmdType, ParametersList);
try
{
val = cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
WriteExLog(ex, cmdText, ParametersList);
throw ex;
}
}
return val;
}
#endregion
#region ExecuteReader
/// <summary>
/// 执行SQL语句并返回数据行
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <returns>数据读取器接口</returns>
public IDataReader ExecuteReader(string cmdText)
{
return ExecuteReader(cmdText, CommandType.Text, null);
}
/// <summary>
/// 执行SQL语句并返回数据行
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <returns>数据读取器接口</returns>
public IDataReader ExecuteReader(string cmdText, CommandType cmdType)
{
return ExecuteReader(cmdText, cmdType, null);
}
/// <summary>
/// 执行SQL语句并返回数据行
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="ParametersList">参数</param>
/// <returns>数据读取器接口</returns>
public IDataReader ExecuteReader(string cmdText, Dictionary<string, object> ParametersList)
{
return ExecuteReader(cmdText, CommandType.Text, ParametersList);
}
/// <summary>
/// 执行SQL语句并返回数据行
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <param name="ParametersList">参数</param>
/// <returns>数据读取器接口</returns>
public IDataReader ExecuteReader(string cmdText, CommandType cmdType, Dictionary<string, object> ParametersList)
{
IDataReader reader = null;
using (DbConnection conn = provider.CreateConnection())
{
var cmd = conn.CreateCommand();
PrepareCommand(conn, cmd, cmdText, cmdType, ParametersList);
try
{
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
WriteExLog(ex, cmdText, ParametersList);
throw ex;
}
return reader;
}
}
#endregion
#region GetOneResult
/// <summary>
/// 执行SQL语句并返回单值对象
/// 即结果集中第一行的第一条数据
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <returns>单值对象－结果集中第一行的第一条数据</returns>
public object GetOneResult(string cmdText)
{
return GetOneResult(cmdText, CommandType.Text, null);
}
/// <summary>
/// 执行SQL语句并返回单值
/// 即结果集中第一行的第一条数据
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <returns>单值对象－结果集中第一行的第一条数据</returns>
public string GetOneString(string cmdText)
{
string str = "";
var res = GetOneResult(cmdText, CommandType.Text, null);
if (res != null) { str = res.ToString(); }
return str;
}
/// <summary>
/// 执行SQL语句并返回单值对象
/// 即结果集中第一行的第一条数据
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <returns>单值对象－结果集中第一行的第一条数据</returns>
public object GetOneResult(string cmdText, CommandType cmdType)
{
return GetOneResult(cmdText, cmdType, null);
}
/// <summary>
/// 执行SQL语句并返回单值
/// 即结果集中第一行的第一条数据
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <returns>单值对象－结果集中第一行的第一条数据</returns>
public string GetOneString(string cmdText, CommandType cmdType)
{
string str = "";
var res = GetOneResult(cmdText, cmdType, null);
if (res != null) { str = res.ToString(); }
return str;
}
/// <summary>
/// 执行SQL语句并返回单值对象
/// 即结果集中第一行的第一条数据
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="ParametersList">参数</param>
/// <returns>单值对象－结果集中第一行的第一条数据</returns>
public object GetOneResult(string cmdText, Dictionary<string, object> ParametersList)
{
return GetOneResult(cmdText, CommandType.Text, ParametersList);
}
public object GetOneResult(string cmdText, CommandType cmdType, Dictionary<string, object> ParametersList)
{
object obj = null;
using (DbConnection conn = provider.CreateConnection())
{
var cmd = conn.CreateCommand();
PrepareCommand(conn, cmd, cmdText, cmdType, ParametersList);
try
{
obj = cmd.ExecuteScalar();
}
catch (Exception ex)
{
StringBuilder sblog = new StringBuilder();
sblog.Append(ex.Message System.Environment.NewLine);
sblog.Append("CommandText: " cmdText System.Environment.NewLine);
if (ParametersList != null)
{
foreach (var item in ParametersList)
{
sblog.Append("Params: " item.Key " = " item.Value.ToString() System.Environment.NewLine);
}
}
SXLibrary.Log.WriteExLog(sblog.ToString(), typeof(DBHelper));
throw ex;
}
return obj;
}
}
#endregion
#region GetDataSet
/// <summary>
/// 填充一个数据集对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <returns>数据集对象</returns>
public DataSet GetDataSet(string cmdText)
{
return GetDataSet(cmdText, CommandType.Text, null);
}
/// <summary>
/// 填充一个数据集对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <returns>数据集对象</returns>
public DataSet GetDataSet(string cmdText, CommandType cmdType)
{
return GetDataSet(cmdText, cmdType, null);
}
/// <summary>
/// 填充一个数据集对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="ParametersList">参数</param>
/// <returns>数据集对象</returns>
public DataSet GetDataSet(string cmdText, Dictionary<string, object> ParametersList)
{
return GetDataSet(cmdText, CommandType.Text, ParametersList);
}
/// <summary>
/// 填充一个数据集对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <param name="ParametersList">参数</param>
/// <returns>数据集对象</returns>
private DataSet GetDataSet(string cmdText, CommandType cmdType, Dictionary<string, object> ParametersList)
{
DataSet ds = new DataSet();
using (DbConnection conn = provider.CreateConnection())
{
var cmd = conn.CreateCommand();
PrepareCommand(conn, cmd, cmdText, cmdType, ParametersList);
DbDataAdapter da = provider.CreateDataAdapter();
da.SelectCommand = cmd;
try
{
da.Fill(ds);
}
catch (Exception ex)
{
throw ex;
}
return ds;
}
}
#endregion
#region GetDataTable
/// <summary>
/// 填充一个数据表对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <returns>数据表对象</returns>
public DataTable GetDataTable(string cmdText)
{
return GetDataTable(cmdText, CommandType.Text, null);
}
/// <summary>
/// 填充一个数据表对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <returns>数据表对象</returns>
public DataTable GetDataTable(string cmdText, CommandType cmdType)
{
return GetDataTable(cmdText, cmdType, null);
}
/// <summary>
/// 填充一个数据表对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="ParametersList">参数</param>
/// <returns>数据表对象</returns>
public DataTable GetDataTable(string cmdText, Dictionary<string, object> ParametersList)
{
return GetDataTable(cmdText, CommandType.Text, ParametersList);
}
/// <summary>
/// 填充一个数据表对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <param name="ParametersList">参数</param>
/// <returns>数据表对象</returns>
public DataTable GetDataTable(string cmdText, CommandType cmdType, Dictionary<string, object> ParametersList)
{
DataTable dt = new DataTable();
using (DbConnection conn = provider.CreateConnection())
{
var cmd = conn.CreateCommand();
PrepareCommand(conn, cmd, cmdText, cmdType, ParametersList);
DbDataAdapter da = provider.CreateDataAdapter();
da.SelectCommand = cmd;
try
{
da.Fill(dt);
}
catch (Exception ex)
{
throw ex;
}
return dt;
}
}
#endregion
#region GetOneDataRow
/// <summary>
/// 填充一个DataRow对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <returns>数据表对象</returns>
public DataRow GetOneDataRow(string cmdText)
{
var dt = GetDataTable(cmdText, CommandType.Text, null);
return dt.Rows.Count == 0 ? null : dt.Rows[0];
}
/// <summary>
/// 填充一个DataRow对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <returns>数据表对象</returns>
public DataRow GetOneDataRow(string cmdText, CommandType cmdType)
{
var dt = GetDataTable(cmdText, cmdType, null);
return dt.Rows.Count == 0 ? null : dt.Rows[0];
}
/// <summary>
/// 填充一个DataRow对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="ParametersList">ParametersList</param>
/// <returns>数据表对象</returns>
public DataRow GetOneDataRow(string cmdText, Dictionary<string, object> ParametersList)
{
var dt = GetDataTable(cmdText, CommandType.Text, ParametersList);
return dt.Rows.Count == 0 ? null : dt.Rows[0];
}
/// <summary>
/// 填充一个DataRow对象并返回之
/// </summary>
/// <param name="cmdText">数据库命令字符串</param>
/// <param name="cmdType">命令执行方式</param>
/// <param name="ParametersList">ParametersList</param>
/// <returns>数据表对象</returns>
public DataRow GetOneDataRow(string cmdText, CommandType cmdType, Dictionary<string, object> ParametersList)
{
var dt = GetDataTable(cmdText, cmdType, ParametersList);
return dt.Rows.Count == 0 ? null : dt.Rows[0];
}
#endregion
#region ExecuteProcedure
/// <summary>
/// 执行带返回参数的存储过程
/// </summary>
/// <param name="ProcedureName">存储过程名</param>
/// <param name="spl">参数列表</param>
/// <returns></returns>
public Dictionary<string, object> ExecuteProcedure(string ProcedureName, DbParameter[] ParametersList)
{
Dictionary<string, object> dc = new Dictionary<string, object>();
using (DbConnection conn = provider.CreateConnection())
{
try
{
var cmd = conn.CreateCommand();
cmd.CommandText = ProcedureName;
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddRange(ParametersList);
cmd.ExecuteNonQuery();
foreach (var item in ParametersList)
{
if (item.Direction == ParameterDirection.Output)
{
dc.Add(item.ParameterName, cmd.Parameters[item.ParameterName].Value);
}
}
return dc;
}
catch (Exception ex)
{
WriteExLog(ex, ProcedureName, ParametersList);
throw ex;
}
}
}
#endregion
/// <summary>
/// 执行多条Sql命令(包含事務功能)
/// </summary>
/// <param name="cmdTextList">Sql命令数组</param>
/// <returns>正确执行返回True，错误执行为False</returns>
public bool ExecuteSqlList(List<string> cmdTextList)
{
bool flag = false;
using (DbConnection conn = provider.CreateConnection())
{
conn.ConnectionString = ConnectionString;
conn.Open();
var cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
var tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
foreach (string sql in cmdTextList)
{
cmd.CommandText = sql;
cmd.ExecuteNonQuery();
}
tx.Commit();
flag = true;
}
catch (Exception ex)
{
tx.Rollback();
SXLibrary.Log.WriteExLog(ex.Message.ToString(), typeof(DBHelper));
throw ex;
}
return flag;
}
}
private List<KeyValuePair<string,DbParameter[]>> TransactionList;
public void AddToTransaction(string cmdText, Dictionary<string, object> ParametersList)
{
if (TransactionList == null)
{ TransactionList = new List<KeyValuePair<string,DbParameter[]>>(); }
List<DbParameter> LP = new List<DbParameter>();
if (ParametersList != null)
{
foreach (var item in ParametersList)
{
var param = provider.CreateParameter();
param.ParameterName = item.Key;
param.Value = item.Value;
LP.Add(param);
}
}
DbParameter[] dbp= null;
if (LP.Count > 0)
{
dbp = LP.ToArray();
}
KeyValuePair<string, DbParameter[]> kvp = new KeyValuePair<string, DbParameter[]>(
cmdText,dbp
);
TransactionList.Add(kvp);
}
/// <summary>
/// ExecuteTransaction 需要先AddToTransaction
/// </summary>
/// <returns></returns>
public bool ExecuteTransaction()
{
bool flag = false;
if (TransactionList == null || TransactionList.Count == 0)
{
return false;
}
using (DbConnection conn = provider.CreateConnection())
{
conn.ConnectionString = ConnectionString;
conn.Open();
var cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
var tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
foreach (var item in TransactionList)
{
cmd.CommandText = item.Key;
cmd.Parameters.AddRange(item.Value);
cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
}
tx.Commit();
flag = true;
}
catch (Exception ex)
{
tx.Rollback();
SXLibrary.Log.WriteExLog(ex.Message.ToString(), typeof(DBHelper));
throw ex;
}
finally {
TransactionList.Clear();
}
return flag;
}
}
#region PrepareCommand
/// <summary>
/// 准备执行命令
/// </summary>
/// <param name="conn">DbConnection</param>
/// <param name="cmd">DbCommand</param>
/// <param name="cmdText">sql命令字符串</param>
/// <param name="cmdType">执行方式</param>
/// <param name="ParametersList">参数</param>
private void PrepareCommand(DbConnection conn, DbCommand cmd, string cmdText, CommandType cmdType, Dictionary<string, object> ParametersList)
{
if (conn.State == ConnectionState.Closed)
{
conn.ConnectionString = ConnectionString;
conn.Open();
}
cmd.CommandText = cmdText;
cmd.CommandType = cmdType;
if (ParametersList != null)
{
foreach (var p in ParametersList)
{
var dp = cmd.CreateParameter();
dp.ParameterName = p.Key;
dp.Value = p.Value;
cmd.Parameters.Add(dp);
}
}
}
/// <summary>
/// 准备执行一个命令
/// </summary>
/// <param name="conn">OleDb连接</param>
/// <param name="cmd">sql命令</param>
/// <param name="trans">OleDb事务</param>
/// <param name="cmdType">命令类型例如 存储过程或者文本</param>
/// <param name="cmdText">命令文本,例如:Select * from Products</param>
/// <param name="cmdParms">执行命令的参数</param>
private void PrepareCommand(DbConnection conn, DbCommand cmd,
SqlTransaction trans, CommandType cmdType,
string cmdText, DbParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
{ conn.Open(); }
cmd.Parameters.Clear();
cmd.Connection = conn;
cmd.CommandText = cmdText;
cmd.CommandType = cmdType;
if (trans != null)
{ cmd.Transaction = trans; }
if (cmdParms != null)
{
foreach (var parm in cmdParms)
{
cmd.Parameters.Add(parm);
}
}
}
#endregion
private void WriteExLog(Exception ex, string cmdText, Dictionary<string, object> ParametersList)
{
StringBuilder sblog = new StringBuilder();
sblog.Append(ex.Message System.Environment.NewLine);
sblog.Append("CommandText: " cmdText System.Environment.NewLine);
if (ParametersList != null)
{
foreach (var item in ParametersList)
{
sblog.Append("Params: " item.Key " = " item.Value.ToString() System.Environment.NewLine);
}
}
SXLibrary.Log.WriteExLog(sblog.ToString(), typeof(DBHelper));
}
private void WriteExLog(Exception ex, string cmdText, DbParameter[] ParametersList)
{
StringBuilder sblog = new StringBuilder();
sblog.Append(ex.Message System.Environment.NewLine);
sblog.Append("CommandText: " cmdText System.Environment.NewLine);
if (ParametersList != null)
{
foreach (var item in ParametersList)
{
sblog.Append("Params: " item.ParameterName " = " item.Value.ToString() System.Environment.NewLine);
}
}
SXLibrary.Log.WriteExLog(sblog.ToString(), typeof(DBHelper));
}
#region Dispose
/// <summary>
/// 释放资源
/// </summary>
public void Dispose()
{
//好像没啥可释放的了，conn用了using 。
}
#endregion
}
}
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