/// <summary>
/// 里程与修正后的里程做对比，然后根据修正后的里程找到点（文件中的指针）
/// </summary>
/// <param name="addFileName">idf文件</param>
/// <param name="mi">输入的里程（单位为公里）</param>
/// <returns>当前点在修正后的里程中相对应的文件指针</returns>
private long MeterToPointNew(DataInfoClass dic, float mi, out IndexStaClass indexStaClsout, out int resultType)
{
List <IndexStaClass> listIndexStaCls = CommonClass.wdp.GetDataIndexInfo(dic.sAddFile);
float len = 0;
long currentPos = 0;
indexStaClsout = new IndexStaClass();
resultType = 0;//代表在校正里程里没有找到里程点，并且在文件原始里程中也找不到。
foreach (IndexStaClass indexStaCls in listIndexStaCls)
{
if (dic.sKmInc == "增")
{
if (mi > float.Parse(indexStaCls.lStartMeter) && mi <= float.Parse(indexStaCls.LEndMeter))
{
len = mi - float.Parse(indexStaCls.lStartMeter);
}
}
else
{
if (mi < float.Parse(indexStaCls.lStartMeter) && mi >= float.Parse(indexStaCls.LEndMeter))
{
len = float.Parse(indexStaCls.lStartMeter) - mi;
}
}
if (len != 0)
{
currentPos = indexStaCls.lStartPoint + (long)((float)(len * indexStaCls.lContainsPoint) / float.Parse(indexStaCls.lContainsMeter)) * dic.fScale.Length * 2;
indexStaClsout = indexStaCls;
resultType = 1;//代表在校正后的里程范围中找到测量点
break;
}
}
if (len == 0)
{
/*
* 遍历结束，里程点不在indexStaClass的范围内。有两种情况：
* 一：输入的里程点不在cit文件的里程范围内。返回0.
* 二：cit文件还没有经过里程校正，直接寻找文件中的里程，找到则返回，否则返回0.
*/
currentPos = CommonClass.wdp.MeterToPoint(dic.sFilePath, (long)(mi * 10000), 4, dic.fOffset.Length, dic.bEncrypt);
if (currentPos != 0)
{
resultType = 2;//代表在文件中的原始数据找到测量点
}
}
//FileStream fs = new FileStream(dic.sFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
//BinaryReader br = new BinaryReader(fs);
//br.BaseStream.Position = indexStaClsout.lStartPoint;
//Byte[] b = br.ReadBytes(dic.fScale.Length * 2);
//if (dic.bEncrypt)
//{
// b = WaveformDataProcess.ByteXORByte(b);
//}
//short km = BitConverter.ToInt16(b, 0);
//short count = BitConverter.ToInt16(b, 2);
return(currentPos);
}
/// <summary>
/// idf数据库操作：查询--IndexSta表格
/// </summary>
/// <param name="sFile">idf全路径文件名</param>
/// <returns>修正索引信息</returns>
public List <IndexStaClass> GetDataIndexInfo(string sFile)
{
List <IndexStaClass> listIC = new List <IndexStaClass>();
try
{
using (OleDbConnection sqlconn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + sFile + ";Persist Security Info=False"))
{
OleDbCommand sqlcom = new OleDbCommand("select * from IndexSta order by id", sqlconn);
sqlconn.Open();
OleDbDataReader sqloledr = sqlcom.ExecuteReader();
while (sqloledr.Read())
{
IndexStaClass ic = new IndexStaClass();
ic.iID = (int)sqloledr.GetInt32(0);
ic.iIndexID = (int)sqloledr.GetInt32(1);
ic.lStartPoint = long.Parse(sqloledr.GetString(2));
ic.lStartMeter = sqloledr.GetString(3);
ic.lEndPoint = long.Parse(sqloledr.GetString(4));
ic.LEndMeter = sqloledr.GetString(5);
ic.lContainsPoint = long.Parse(sqloledr.GetString(6));
ic.lContainsMeter = sqloledr.GetString(7);
ic.sType = sqloledr.GetString(8);
listIC.Add(ic);
}
sqlconn.Close();
}
}
catch
{
}
return(listIC);
}
/// <summary>
/// 把测量半径转化为在cit文件中实际上(里程校正之后)覆盖的测量点的个数(默认是一米4个点)
/// </summary>
/// <param name="meterageRadius">测量半径(单位为米)</param>
/// <param name="indexStaCls">取测量点的区域</param>
/// <returns>测量半径覆盖的测量点的个数(默认是一米4个点)</returns>
public int GetDotFromMeterageRadius(int m_meterageRadius, IndexStaClass indexStaCls)
{
int dotNum = 0;
dotNum = (int)(m_meterageRadius * indexStaCls.lContainsPoint / (float.Parse(indexStaCls.lContainsMeter) * 1000));
return(dotNum);
}
