/// <summary>
/// 缓冲区注册
/// </summary>
/// <param name="key"></param>
/// <param name="statment"></param>
/// <param name="bufType"></param>
/// <returns></returns>
public bool RegBufferInf(string key, string statment, BufType bufType, Boolean isEncrypt, Dictionary <string, object> pars)
{
if (_bufInf == null)
{
_bufInf = CreateBufTabInf();
////如果存在缓冲区配置文件，则直接进行读取
//if (File.Exists(_bufDir + BUF_CONFIG_FILE_NAME) == true)
//{
// _bufInf.ReadXml(_bufDir + BUF_CONFIG_FILE_NAME);
//}
}
//如果存在相同的值，则退出
if (HasReg(key))
{
throw new UserException("该键值已经存在，不能重复注册。");
}
DataRow drBufInf = _bufInf.NewRow();
string strPars = "";
if (pars != null)
{
strPars = SerialObjectToString(pars);
}
drBufInf[BUF_FIELD_KEY] = key;
drBufInf[BUF_FIELD_STATEMENT] = statment;
drBufInf[BUF_FIELD_PARS] = strPars;
drBufInf[BUF_FIELD_TYPE] = (int)bufType;
drBufInf[BUF_FIELD_VER] = BUF_DEFAULT_VER_TAG;
string sec = "";
using (Encrypt crypt = new Encrypt(key + BUF_CFG_ENCRYPT_KEY))
{
if (isEncrypt == true)
{
sec = crypt.EncryptStr(BUF_SECURITY_TAG);
}
else
{
sec = crypt.EncryptStr(BUF_NOSECURITY_TAG);
}
}
drBufInf[BUF_FIELD_SEC] = sec;
_bufInf.Rows.Add(drBufInf);
return(true);
}
/// <summary>
/// 刷新缓冲区
/// </summary>
/// <param name="key"></param>
/// <param name="version"></param>
/// <param name="onRefreshBuffer"></param>
public void RefreshBuffer(string key, int version, RefreshBufferEvent onRefreshBuffer)
{
if (_bufInf == null)
{
return;
}
//取得对应的缓冲信息
DataRow drBuf = _bufInf.Select(BUF_FIELD_KEY + "='" + key + "'")[0];
BufType bufType = (BufType)Convert.ToInt16(drBuf[BUF_FIELD_TYPE]);
string statment = Convert.ToString(drBuf[BUF_FIELD_STATEMENT]);
string pars = Convert.ToString(drBuf[BUF_FIELD_PARS]);
string sec = "";
//如果不缓冲，则退出
if (bufType == BufType.BufNone)
{
return;
}
//读取缓冲区的加密状态配置
using (Encrypt crypt = new Encrypt(key + BUF_CFG_ENCRYPT_KEY))
{
sec = crypt.DecryptStr(Convert.ToString(drBuf[BUF_FIELD_SEC]));
}
bool cusRead = false;
DataTable dtData = null;
if (onRefreshBuffer != null)
{
dtData = onRefreshBuffer(key, statment, _db, cusRead);
}
if (cusRead == false)
{
//从数据库读取数据
dtData = ReadDataFromDB(statment, pars);
}
if (dtData == null)
{
return;
}
dtData.TableName = key;
WriteTableToDiskBuf(key, dtData, ((sec == BUF_NOSECURITY_TAG) ? false : true));
if (bufType == BufType.BufToMem)
{
AddDataToMem(key, dtData);
}
//更新缓冲区版本信息
if (version != BUF_DEFAULT_VER_TAG)
{
//刷新数据后，回写缓冲区版本信息
drBuf[BUF_FIELD_VER] = version;
}
}
/// <summary>
/// 从缓冲区查询数据
/// </summary>
/// <param name="key"></param>
/// <param name="bufVer"></param>
/// <param name="hasCopy"></param>
/// <param name="onRefreshBuffer"></param>
/// <returns></returns>
public DataTable QueryBuffer(string key, int bufVer, bool hasCopy, RefreshBufferEvent onRefreshBuffer)
{
if (_bufInf == null)
{
throw new UserException("缓冲区信息对象无效，对象不能为 null。");
}
if (HasReg(key) == false)
{
throw new UserException("未注册的缓冲区数据查询。");
}
//取得对应的缓冲信息
DataRow drBuf = _bufInf.Select(BUF_FIELD_KEY + "='" + key + "'")[0];
BufType bufType = (BufType)Convert.ToInt16(drBuf[BUF_FIELD_TYPE]);
int version = (int)Convert.ToInt16(drBuf[BUF_FIELD_VER]);
string statment = Convert.ToString(drBuf[BUF_FIELD_STATEMENT]);
string pars = Convert.ToString(drBuf[BUF_FIELD_PARS]);
string sec = "";
string bufFilePath = GetBufFilePath(key);
//读取缓冲区的加密状态配置
using (Encrypt crypt = new Encrypt(key + BUF_CFG_ENCRYPT_KEY))
{
sec = crypt.DecryptStr(Convert.ToString(drBuf[BUF_FIELD_SEC]));
}
if (bufType == BufType.BufToMem)
{
//从内存中读取数据
//如果本地内存中不存在，或者缓冲版本与当前程序版本不同，则重新刷新缓冲区数据
if ((_memBuf == null) || (_memBuf.Tables.Contains(key) == false))
{
if (File.Exists(bufFilePath) == false || bufVer > version)
{
RefreshBuffer(key, bufVer, onRefreshBuffer);
}
else
{
//从本地读取缓冲数据
DataTable dtData = SecurityReadFileToDataBuf(key, sec, bufVer, onRefreshBuffer);
if (dtData == null)
{
return(null);
}
AddDataToMem(key, dtData);
}
}
//如果数据未缓冲到内存中，则返回null
if ((_memBuf == null) || (_memBuf.Tables.Contains(key) == false))
{
return(null);
}
//使用clone方式，返回新的datatable对象
if (hasCopy)
{
return(_memBuf.Tables[key].Copy());
}
else
{
return(_memBuf.Tables[key]);
}
}
else if (bufType == BufType.BufToDisk)
{
//从本地文件中读取数据
//如果本地文件不存在，或者缓冲版本与当前程序版本不同，则重新刷新缓冲区数据
if (File.Exists(bufFilePath) == false || bufVer > version)
{
RefreshBuffer(key, bufVer, onRefreshBuffer);
}
//从本地文件读取数据
return(SecurityReadFileToDataBuf(key, sec, bufVer, onRefreshBuffer));
}
else
{
return(ReadDataFromDB(statment, pars));
}
}
/// <summary>
/// 缓冲区注册
/// </summary>
/// <param name="key"></param>
/// <param name="statment"></param>
/// <param name="bufType"></param>
/// <param name="isEncrypt"></param>
/// <returns></returns>
public bool RegBufferInf(string key, string statment, BufType bufType, Boolean isEncrypt)
{
return(RegBufferInf(key, statment, bufType, isEncrypt, null));
}
/// <summary>
/// 注册缓冲区信息
/// </summary>
/// <param name="key"></param>
/// <param name="statment"></param>
/// <param name="bufType"></param>
/// <returns></returns>
public bool RegBufferInf(string key, string statment, BufType bufType)
{
return(RegBufferInf(key, statment, bufType, false, null));
}
/// <summary>
/// 缓冲区注册
/// </summary>
/// <param name="key"></param>
/// <param name="statment"></param>
/// <param name="bufType"></param>
/// <param name="pars"></param>
/// <returns></returns>
public bool RegBufferInf(string key, string statment, BufType bufType, Dictionary <string, object> pars)
{
return(RegBufferInf(key, statment, bufType, false, pars));
}
public static Color GetColor(BufType bt)
{
return(bufColors[(int)bt]);
}
public static Color GetColor(BufType bt)
{
return bufColors[(int)bt];
}
public USOCounter(int PLCAddr)
{
_PLCAddr = PLCAddr;
buffer = BufType.USO;
}
public void SetState(BufType b)
{
this.buf = b;
}
public void SetMemento(Memento m)
{
Buf = m.GetState();
}