Code///////////////////////////////////////////////////////////////////////////////
///
///数据访问逻辑类操作说明：
/// 1.在执行任何数据操作之前，首先执行Open(),否则返回null或-1;
/// 2.在执行任何操作之后，执行Close()，或Dispose()
/// 3.类扑获所有数据库操作的异常。
/// 4.ExecuteDataAdapter不支持事务处理。需要在操作前手工操作
/// 5.执行带参数的Sql语句的格式必须符合Sql的格式要求，即：@parametername;
/// 6.对于大量的数据操作请直接构造Sql语句，对少量的数据操作可以采用本类提供的数据操作方法。
/// 7.在DataReader操作之后，请执行Close()命令。
///
/// 示例：
/// String[] strColumn = new String[]{"TableName","TableDescribe","TitleName","FlagEstablish","FlagDel"};
/// object[] objValue = new Object[] {"asdf","xxx","",0,0};
/// String[] strKey = new String[] {"TableID"};
/// object[] objKey = new Object[]{333};
/// db.RecordAddNew("_RHOA_Table",strColumn,objValue);
/// db.RecordSave("_RHOA_Table",strColumn,objValue,strKey,objKey);
/// db.RecordDelete("_RHOA_Table",strKey,objKey,"");
///
///
///////////////////////////////////////////////////////////////////////////////
using System;
using System.Data.OleDb;
using System.Xml;
using System.Data.SqlClient;
using System.Data;
using System.IO;
using System.Configuration;
using System.Text;
namespace BLLV2.DBAccess
{
/// <summary>
/// clsDB 的摘要说明。
/// </summary>
public class clsSQLDB:IDatabase
{
private SqlConnection mConn;
private SqlTransaction mTrans;
private bool mblnInTrans;
private bool mblnOpened;
public clsSQLDB(String strConnectionString)
{
try
{
mConn = new SqlConnection(strConnectionString);
this.mTrans = null;
this.mblnInTrans = false;
mblnOpened = false;
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"clsSQLDB构造函数错误：" + strConnectionString);
mConn = null;
this.mTrans = null;
this.mblnInTrans = false;
mblnOpened = false;
}
}
#region 数据库操作：打开、关闭、释放资源
/// <summary>
/// 是否成功打开数据库连接
/// </summary>
/// <returns></returns>
public override bool Open()
{
try
{
if(mConn.State == ConnectionState.Closed )
{
mConn.Open();
this.mblnOpened = true;
this.mblnInTrans = false;
}
return true;
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"数据库打开错误；");
return false;
}
}
/// <summary>
/// 关闭数据库连接
/// </summary>
public override void Close()
{
try
{
if(mConn.State != ConnectionState.Closed)
{
mConn.Close();
this.mblnOpened = false;
this.mblnInTrans = false;
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"数据库关闭错误；");
}
}
/// <summary>
/// 释放资源
/// </summary>
public override void Dispose()
{
this.Close();
if(mConn!=null) mConn.Dispose();
}
#endregion
#region 数据操作：添加记录、修改记录、保存记录、删除记录
/// <summary>
/// 保存一条记录
/// </summary>
/// <param name="strTableName">表名称</param>
/// <param name="strColumns">字段名称</param>
/// <param name="objValues">字段值</param>
/// <param name="strKeys">主键字段</param>
/// <param name="objKeys">主键字段值</param>
/// <returns>是否成功</returns>
public override bool RecordSave(String strTableName,
String[] strColumns,
object[] objValues,
String[] strKeys,
object[] objKeys)
{
String strSql = "";
Object objExistNum;
String[] strColumns_;
object[] objValues_;
try
{
if(!this.mblnOpened)
{
this.ErrorLog("RecordAddNew","数据库尚未打开连接","");
return false;
}
else if(strColumns==null || objValues==null )
{
this.ErrorLog("RecordAddNew","参数不可以为空引用","");
return false;
}
else if(strColumns.Length != objValues.Length )
{
this.ErrorLog("RecordAddNew","参数匹配错误","");
return false;
}
else if(strColumns.Length < 1)
{
this.ErrorLog("RecordAddNew","缺少参数","");
return false;
}
else if(strKeys!=null && objKeys!=null && strKeys.Length != objKeys.Length )
{
this.ErrorLog("RecordUpdate","参数匹配错误","");
return false;
}
else
{
if(strKeys!=null && objKeys!=null)
{
//如果存在主键
//根据主键生成条件
for(Int32 i=0;i<strKeys.Length;i++)
{
if(objKeys[i].GetType() == typeof(String))
{
strSql = strSql + " AND " + strKeys[i] + "='"+Convert.ToString(objKeys[i])+"'";
}
else
{
strSql = strSql + " AND " + strKeys[i] + "=" + objKeys[i];
}
}
strSql = "SELECT COUNT(*) FROM " + strTableName + " WHERE " + strSql.Trim().TrimStart("AND".ToCharArray());
objExistNum = this.ExecuteScalar(strSql);
if(Convert.ToInt32(objExistNum) == 0)
{
//不存在相同的主键记录
strColumns_ = new String[strKeys.Length + strColumns.Length];
objValues_ = new object[strKeys.Length + strColumns.Length];
strKeys.CopyTo(strColumns_,0);
strColumns.CopyTo(strColumns_,strKeys.Length);
objKeys.CopyTo(objValues_,0);
objValues.CopyTo(objValues_,objKeys.Length );
return this.RecordAddNew(strTableName,strColumns_,objValues_);
}
else
{
//存在相同的主键记录
return this.RecordUpdate(strTableName,strColumns,objValues,strKeys,objKeys,"");
}
}
else
{
return this.RecordAddNew(strTableName,strColumns,objValues);
}
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"RecordSave;操作错误" + strTableName);
return false;
}
}
/// <summary>
/// 添加一条记录
/// </summary>
/// <param name="strTableName">表名称</param>
/// <param name="strColumns">字段名称</param>
/// <param name="objValues">字段值</param>
/// <returns>是否成功</returns>
public override bool RecordAddNew(String strTableName,
String[] strColumns,
object[] objValues)
{
String strSql = "";
try
{
if(!this.mblnOpened)
{
this.ErrorLog("RecordAddNew","数据库尚未打开连接","");
return false;
}
else if(strColumns==null || objValues==null )
{
this.ErrorLog("RecordAddNew","参数不可以为空引用","");
return false;
}
else if(strColumns.Length != objValues.Length )
{
this.ErrorLog("RecordAddNew","参数匹配错误","");
return false;
}
else if(strColumns.Length < 1)
{
this.ErrorLog("RecordAddNew","缺少参数","");
return false;
}
else
{
foreach(String strFieldName in strColumns)
{
strSql = strSql +",@" + strFieldName.Trim();
}
strSql = "INSERT INTO " + strTableName + " (" + strSql.Replace("@","").TrimStart(',') + ") VALUES("+strSql.TrimStart(',')+")";
if(this.ExecuteNonQuery(strSql, strColumns, objValues)!=-1)
return true;
else
return false;
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"RecordAddNew；无法执行：" + strTableName);
return false;
}
}
/// <summary>
/// 修改一条记录
/// </summary>
/// <param name="strTableName">表名称</param>
/// <param name="strColumns">字段名称</param>
/// <param name="objValues">字段值</param>
/// <param name="strKeys">主键字段</param>
/// <param name="objKeys">主键字段值</param>
/// <param name="strCustomCondition">其他条件</param>
/// <returns>是否成功</returns>
public override bool RecordUpdate(String strTableName,
String[] strColumns,
object[] objValues,
String[] strKeys,
object[] objKeys,
String strCustomCondition)
{
String strSql = "";
String strSqlWhere = "";
try
{
if(!this.mblnOpened)
{
this.ErrorLog("RecordUpdate","数据库尚未打开连接","");
return false;
}
else if(strColumns==null || objValues==null )
{
this.ErrorLog("RecordAddNew","参数不可以为空引用","");
return false;
}
else if(strColumns.Length != objValues.Length )
{
this.ErrorLog("RecordUpdate","参数匹配错误","");
return false;
}
else if(strColumns.Length < 1)
{
this.ErrorLog("RecordUpdate","缺少参数","");
return false;
}
else if(strKeys!=null && objKeys!=null && strKeys.Length != objKeys.Length )
{
this.ErrorLog("RecordUpdate","参数匹配错误","");
return false;
}
else
{
//根据主键生成条件
if(strKeys!=null && objKeys!=null)
{
for(Int32 i=0;i<strKeys.Length;i++)
{
if(objKeys[i].GetType() == typeof(String))
{
strSqlWhere = strSqlWhere + " AND " + strKeys[i] + "='"+Convert.ToString(objKeys[i])+"'";
}
else
{
strSqlWhere = strSqlWhere + " AND " + strKeys[i] + "=" + objKeys[i];
}
}
}
if(strCustomCondition!=null && strCustomCondition!="")
{
strSqlWhere = strSqlWhere + " AND " + strCustomCondition;
}
//strSqlWhere = strSqlWhere.Trim().TrimStart().TrimStart("AND".ToCharArray());
if(strSqlWhere.IndexOf(" AND") == 0)
strSqlWhere = strSqlWhere.Remove(0,4);
if(strSqlWhere!="")
strSqlWhere = " WHERE " + strSqlWhere;
foreach(String strField in strColumns)
{
strSql = strSql + "," + strField.Trim() +"=@" + strField.Trim();
}
strSql = "UPDATE " + strTableName + " SET " + strSql.TrimStart(',') + strSqlWhere;
if(this.ExecuteNonQuery(strSql, strColumns, objValues)!=-1)
return true;
else
return false;
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"RecordUpdate；无法执行：" + strTableName);
return false;
}
}
/// <summary>
/// 删除表记录
/// </summary>
/// <param name="strTableName">表名称</param>
/// <param name="strKeys">主键字段</param>
/// <param name="objKeys">主键字段值</param>
/// <param name="strCustomCondition">其他条件</param>
/// <returns>是否成功</returns>
/// <returns></returns>
public override bool RecordDelete(String strTableName,
String[] strKeys,
object[] objKeys,
String strCustomCondition)
{
String strSql = "";
try
{
if(!this.mblnOpened)
{
this.ErrorLog("RecordDelete","数据库尚未打开连接","");
return false;
}
else if(strKeys!=null && objKeys!=null && strKeys.Length != objKeys.Length )
{
this.ErrorLog("RecordDelete","参数匹配错误","");
return false;
}
else
{
//根据主键生成条件
if(strKeys!=null && objKeys!=null)
{
for(Int32 i=0;i<strKeys.Length;i++)
{
if(objKeys[i].GetType() == typeof(String))
{
strSql = strSql + " AND " + strKeys[i] + "='"+Convert.ToString(objKeys[i])+"'";
}
else
{
strSql = strSql + " AND " + strKeys[i] + "=" + objKeys[i];
}
}
}
if(strCustomCondition!=null && strCustomCondition!="")
{
strSql = strSql + " AND " + strCustomCondition;
}
strSql = strSql.Trim().TrimStart("AND".ToCharArray());
if(strSql!="")
strSql = " WHERE " + strSql;
strSql = "DELETE FROM " + strTableName + strSql;
if(this.ExecuteNonQuery(strSql)!=-1)
return true;
else
return false;
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"RecordDelete；无法执行：" + strTableName);
return false;
}
}
#endregion
#region 数据读取：Reader、DataSet、DataView、DataTable、ExecuteScalar
public override System.Data.IDataReader ExecuteReader(string strCommand,bool blnHaveBomb )
{
SqlCommand cmd=null;
SqlDataReader da=null;
try
{
if(!this.mblnOpened) return null;
cmd = new SqlCommand(strCommand,this.mConn);
if(this.mblnInTrans) cmd.Transaction = this.mTrans;
if(blnHaveBomb)
da = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.CloseConnection );
else
da = cmd.ExecuteReader(CommandBehavior.CloseConnection );
return (IDataReader)da;
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteReader()；无法执行：" + strCommand);
return null;
}
finally
{
if(cmd!=null)cmd.Dispose();
}
}
/// <summary>
/// 执行Reader
/// </summary>
/// <param name="strCommand"></param>
/// <returns></returns>
public override System.Data.IDataReader ExecuteReader(string strCommand )
{
SqlCommand cmd=null;
SqlDataReader da=null;
try
{
if(!this.mblnOpened) return null;
cmd = new SqlCommand(strCommand,this.mConn);
if(this.mblnInTrans) cmd.Transaction = this.mTrans;
da = cmd.ExecuteReader(CommandBehavior.CloseConnection );
return (IDataReader)da;
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteReader()；无法执行：" + strCommand);
return null;
}
finally
{
if(cmd!=null)cmd.Dispose();
}
}
public override System.Data.DataSet ExecuteDataset(string strCommand)
{
SqlCommand cmd=null;
SqlDataAdapter da=null;
DataSet ds=null;
try
{
if(!this.mblnOpened) return null;
cmd = new SqlCommand(strCommand,this.mConn);
if(this.mblnInTrans) cmd.Transaction = this.mTrans;
da = new SqlDataAdapter(cmd);
ds = new DataSet();
da.Fill(ds);
return ds;
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteDataset()；无法执行：" + strCommand);
return null;
}
finally
{
if(cmd!=null)cmd.Dispose();
if(ds!=null)da.Dispose();
}
}
public override System.Data.DataView ExecuteDataView(string strCommand)
{
SqlDataAdapter da=null;
SqlCommand cmd=null;
DataSet ds=null;
DataView dv=null;
try
{
if(!this.mblnOpened) return null;
cmd = new SqlCommand(strCommand,this.mConn);
if(this.mblnInTrans) cmd.Transaction = this.mTrans;
da = new SqlDataAdapter(cmd);
ds = new DataSet();
da.Fill(ds);
if(ds.Tables.Count > 0)
{
dv = new DataView(ds.Tables[0]);
}
return dv;
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteDataView()；无法执行：" + strCommand);
return null;
}
finally
{
if(cmd!=null)cmd.Dispose();
if(da!=null)da.Dispose();
if(ds!=null)ds.Dispose();
}
}
public override System.Data.DataTable ExecuteDataTable(string strCommand)
{
SqlDataAdapter da=null;
SqlCommand cmd=null;
DataSet ds=null;
DataTable dt=null;
try
{
if(!this.mblnOpened) return null;
cmd = new SqlCommand(strCommand,this.mConn);
if(this.mblnInTrans) cmd.Transaction = this.mTrans;
da = new SqlDataAdapter(cmd);
ds = new DataSet();
da.Fill(ds);
if(ds.Tables.Count > 0)
{
dt = ds.Tables[0].Copy();
}
return dt;
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteDataTable()；无法执行：" + strCommand);
return null;
}
finally
{
if(cmd!=null)cmd.Dispose();
if(da!=null)da.Dispose();
if(ds!=null) ds.Dispose();
}
}
public override object ExecuteScalar(string strCommand)
{
SqlCommand cmd=null;
try
{
if(this.mblnOpened)
{
cmd = new SqlCommand(strCommand,this.mConn);
if(this.mblnInTrans) cmd.Transaction = this.mTrans;
return cmd.ExecuteScalar();
}
else
{
return null;
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"clsSQLDB.strCommand()；无法执行：" + strCommand);
return null;
}
finally
{
if(cmd!=null)cmd.Dispose();
}
}
#endregion
#region 其他操作
//不支持事务处理
public override System.Data.IDataAdapter ExecuteDataAdapter(string strCommand)
{
SqlDataAdapter da = null;
try
{
if(!this.mblnOpened) return null;
da = new SqlDataAdapter(strCommand,this.mConn);
return da;
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteDataAdapter;无法执行：" + strCommand);
return null;
}
}
public override int ExecuteNonQuery(string strCommand)
{
SqlCommand cmd = null;
try
{
if(!this.mblnOpened) return -1;
else
{
cmd = new SqlCommand(strCommand,this.mConn);
if(this.mblnInTrans)
{
cmd.Transaction = this.mTrans;
}
return cmd.ExecuteNonQuery();
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteNonQuery；无法执行："+strCommand);
return -1;
}
finally
{
if(cmd!=null)cmd.Dispose();
}
}
public override int ExecuteNonQuery(string strSql, string[] strParameterNames,Object[] objObjects)
{
SqlCommand cmd = null;
SqlParameter p = null;
try
{
if(!this.mblnOpened) return -1;
if(strParameterNames !=null && objObjects != null && strParameterNames.Length != objObjects.Length)
{
this.ErrorLog("clsSQLDB.ExecuteNonQuery()","传递的参数不匹配",strSql);
return -1;
}
else
{
cmd = new SqlCommand(strSql,this.mConn);
if(this.mblnInTrans)
{
cmd.Transaction = this.mTrans;
}
if(strParameterNames !=null && objObjects != null)
{
for(Int32 i=0;i<strParameterNames.Length ;i++)
{
p = new SqlParameter("@" + strParameterNames[i],objObjects[i]);
cmd.Parameters.Add(p);
}
}
return cmd.ExecuteNonQuery();
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteNonQuery；无法执行："+strSql);
return -1;
}
finally
{
if(cmd!=null)cmd.Dispose();
}
}
public override System.Xml.XmlReader ExecuteXmlReader(string strSqlXml)
{
SqlCommand cmd = null;
try
{
if(!this.mblnOpened) return null;
cmd = new SqlCommand(strSqlXml,this.mConn);
if(this.mblnOpened)
{
if(this.mblnInTrans) cmd.Transaction = this.mTrans;
return cmd.ExecuteXmlReader();
}
else
{
return null;
}
}
catch(Exception e)
{
this.ErrorLog(e.Source,e.Message,"ExecuteXmlReader；无法执行：" + strSqlXml);
return null;
}
finally
{
if(cmd!=null) cmd.Dispose();
}
}
#endregion
#region 事务处理
/// <summary>
/// 开始事务处理
/// </summary>
/// <returns>是否成功开始事务处理</returns>
public override bool BeginTrans()
{
if(!this.mblnInTrans && this.mblnOpened)
{
this.mTrans = this.mConn.BeginTransaction();
this.mblnInTrans = true;
return true;
}
else
{
return false;
}
}
//提交
public override void Commit()
{
if(this.mblnInTrans)
{
this.mTrans.Commit();
this.mblnInTrans = false;
}
}
//回退
public override void Rollback()
{
if(this.mblnInTrans)
{
this.mTrans.Rollback();
this.mblnInTrans = false;
}
}
#endregion
#region 属性
/// <summary>
/// 数据库状态
/// </summary>
public override System.Data.ConnectionState State
{
get
{
return this.mConn.State;
}
}
//数据库类型
public override DataBaseType DBType
{
get
{
return DataBaseType.SQLServer;
}
}
#endregion
}
}