protected virtual void OnLinetypeSegmentRemovedEvent(LinetypeSegment item)
{
LinetypeSegmentRemovedEventHandler ae = this.LinetypeSegmentRemoved;
if (ae != null)
{
ae(this, new LinetypeSegmentChangeEventArgs(item));
}
}
public static Linetype Load(string file, string linetypeName)
{
Linetype linetype = null;
List <LinetypeSegment> segments = new List <LinetypeSegment>();
using (StreamReader reader = new StreamReader(File.Open(file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite), true))
{
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading LIN file.", file);
}
// lines starting with semicolons are comments
if (line.StartsWith(";"))
{
continue;
}
// every line type definition starts with '*'
if (!line.StartsWith("*"))
{
continue;
}
// reading line type name and description
int endName = line.IndexOf(','); // the first semicolon divides the name from the description that might contain more semicolons
string name = line.Substring(1, endName - 1);
string description = line.Substring(endName + 1, line.Length - endName - 1);
// remove start and end spaces
description = description.Trim();
if (name.Equals(linetypeName, StringComparison.OrdinalIgnoreCase))
{
// we have found the line type name, the next line of the file contains the line type definition
line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading LIN file.", file);
}
string[] tokens = line.Split(',');
// the index 0 is always A (alignment field)
for (int i = 1; i < tokens.Length; i++)
{
double length;
if (double.TryParse(tokens[i], out length))
{
// is the length followed by a shape o text segment
if (i + 1 < tokens.Length)
{
if (tokens[i + 1].StartsWith("[", StringComparison.CurrentCultureIgnoreCase))
{
StringBuilder data = new StringBuilder();
// there are two kinds of complex linetype Text and Shape,
// the data is enclosed in brackets
bool end = false;
while (!end)
{
data.Append(tokens[++i]);
data.Append(",");
if (i >= tokens.Length)
{
return(null); // text and shape data must be enclosed by brackets
}
if (tokens[i].EndsWith("]"))
{
data.Append(tokens[i]);
end = true;
}
}
LinetypeSegment segment = ReadLineTypeComplexSegment(data.ToString(), length);
if (segment != null)
{
segments.Add(segment);
}
}
else
{
segments.Add(new LinetypeSimpleSegment(length));
}
}
else
{
segments.Add(new LinetypeSimpleSegment(length));
}
}
else
{
throw new FormatException("The linetype definition is not well formatted.");
}
}
linetype = new Linetype(name, segments, description);
break;
}
}
}
return(linetype);
}
public LinetypeSegmentChangeEventArgs(LinetypeSegment item)
{
this.item = item;
}
