private int ShowHeader(SHPHeader ASHPHeader)
{
byte[] B = IntegerBytes(ASHPHeader.FileLength);
int result = B[3] + (B[2] * 256) + (B[1] * 256 * 256) + (B[0] * 256 * 256 * 256);
if (debug != null)
{
AddDebug("FileCode: " + ASHPHeader.FileCode.ToString());
AddDebug("Filelength: " + ASHPHeader.FileLength.ToString());
AddDebug("FileSize: " + Convert.ToString(2 * result));
}
result = (result * 2 - 100) / 8;
if (debug != null)
{
AddDebug("NumRecords: " + result.ToString());
AddDebug("Version: " + Convert.ToString(ASHPHeader.Version));
AddDebug("ShapeType: " + Convert.ToString(ASHPHeader.ShapeType));
AddDebug("XMin: " + Convert.ToString(ASHPHeader.XMin));
AddDebug("YMin: " + Convert.ToString(ASHPHeader.YMin));
AddDebug("XMax: " + Convert.ToString(ASHPHeader.XMax));
AddDebug("YMax: " + Convert.ToString(ASHPHeader.YMax));
AddDebug("ZMin: " + Convert.ToString(ASHPHeader.ZMin));
AddDebug("ZMax: " + Convert.ToString(ASHPHeader.ZMax));
AddDebug("MMin: " + Convert.ToString(ASHPHeader.MMin));
AddDebug("MMax: " + Convert.ToString(ASHPHeader.MMax));
}
return(result);
}
private void ReadSHPHeader(Stream f, ref SHPHeader ASHPHeader)
{
BinaryReader bin = new BinaryReader(f);
int myInt32;
double myDouble;
for (int i = 0; i < 9; ++i)
{
myInt32 = bin.ReadInt32();
AddInteger(ref ASHPHeader, i, myInt32);
}
for (int i = 0; i < 8; ++i)
{
myDouble = bin.ReadDouble();
AddDouble(ref ASHPHeader, i, myDouble);
}
}
private void AddInteger(ref SHPHeader ASHPHeader, int Order, int MyInt32)
{
switch (Order)
{
case 0:
ASHPHeader.FileCode = MyInt32;
break;
case 1:
ASHPHeader.Unused1 = MyInt32;
break;
case 2:
ASHPHeader.Unused2 = MyInt32;
break;
case 3:
ASHPHeader.Unused3 = MyInt32;
break;
case 4:
ASHPHeader.Unused4 = MyInt32;
break;
case 5:
ASHPHeader.Unused5 = MyInt32;
break;
case 6:
ASHPHeader.FileLength = MyInt32;
break;
case 7:
ASHPHeader.Version = MyInt32;
break;
case 8:
ASHPHeader.ShapeType = MyInt32;
break;
}
}
private void AddDouble(ref SHPHeader ASHPHeader, int Order, double MyDouble)
{
switch (Order)
{
case 0:
ASHPHeader.XMin = MyDouble;
break;
case 1:
ASHPHeader.YMin = MyDouble;
break;
case 2:
ASHPHeader.XMax = MyDouble;
break;
case 3:
ASHPHeader.YMax = MyDouble;
break;
case 4:
ASHPHeader.ZMin = MyDouble;
break;
case 5:
ASHPHeader.ZMax = MyDouble;
break;
case 6:
ASHPHeader.MMin = MyDouble;
break;
case 7:
ASHPHeader.MMax = MyDouble;
break;
}
}
/// <summary>
/// Loads an ESRI(c) SHP file into a Map series.
/// </summary>
/// <param name="Series"></param>
/// <param name="FileName"></param>
/// <param name="Table"></param>
/// <param name="FieldName"></param>
/// <param name="FieldValue"></param>
/// <param name="Debug"></param>
public void LoadMap(Map Series, string FileName, DataTable Table,
string FieldName, string FieldValue, ListBox.ObjectCollection Debug,
string filter)
{
debug = Debug;
SHPHeader shpHeader = new SHPHeader();
SHPRecordHeader shpRecordHeader = new SHPRecordHeader();
// Verify map file name
string tmpName = replaceFilePath(FileName, ".shp");
FileStream f = File.OpenRead(tmpName);
try
{
if (debug != null)
{
debug.Clear();
}
AddDebug("Real File size: " + f.Length.ToString());
f.Position = 0;
ReadSHPHeader(f, ref shpHeader);
VerifySignature(shpHeader.FileCode, tmpName);
ShowHeader(shpHeader);
tmpName = replaceFilePath(FileName, ".shx");
FileStream fx = File.OpenRead(tmpName);
try
{
fx.Position = 0;
ReadSHPHeader(fx, ref shpHeader);
VerifySignature(shpHeader.FileCode, tmpName);
if (debug != null)
{
AddDebug(" ");
AddDebug("Real File size: " + fx.Length.ToString());
}
int NumRecords = ShowHeader(shpHeader);
Series.Clear();
Series.BeginUpdate();
Series.Chart.AutoRepaint = false;
for (int i = 1; i <= NumRecords; ++i)
{
ReadRecordHeader(fx, ref shpRecordHeader);
if (debug != null)
{
AddDebug(" ");
AddDebug("Record Num: " + Convert.ToString(i) + " Offset: " + Convert.ToString(2 * shpRecordHeader.RecordNumber) +
" Length: " + Convert.ToString(shpRecordHeader.RecordLength));
}
f.Position = 2 * shpRecordHeader.RecordNumber;
ReadRecordHeader(f, ref shpRecordHeader);
if (debug != null)
{
AddDebug("Record Num: " + Convert.ToString(shpRecordHeader.RecordNumber));
}
BinaryReader bin = new BinaryReader(f);
ShapeType = bin.ReadInt32();
LoadShape(bin, Table, Series, FieldName, FieldValue, i - 1);
}
Series.EndUpdate();
Series.Chart.AutoRepaint = true;
//Series.Chart.Invalidate();
}
finally
{
fx.Close();
}
}
finally
{
f.Close();
}
}
