//checks the checksum against the string
public bool ValidateChecksum(string Sentence)
{
int sum = 0;
try
{
char[] sentenceChars = Sentence.ToCharArray();
// All character xor:ed results in the trailing hex checksum
// The checksum calc starts after '$' and ends before '*'
int inx;
for (inx = 1; ; inx++)
{
if (inx >= sentenceChars.Length) // No checksum found
{
return(false);
}
var tmp = sentenceChars[inx];
// Indicates end of data and start of checksum
if (tmp == '*')
{
break;
}
sum ^= tmp; // Build checksum
}
// Calculated checksum converted to a 2 digit hex string
string sumStr = String.Format("{0:X2}", sum);
// Compare to checksum in sentence
return(sumStr.Equals(Sentence.Substring(inx + 1, 2)));
}
catch (Exception e)
{
mf.WriteErrorLog("Validate Checksum" + e);
return(false);
}
}
private void btnSave_Click(object sender, EventArgs e)
{
//fill something in
if (String.IsNullOrEmpty(tboxFieldName.Text.Trim()))
{
Close();
return;
}
//append date time to name
mf.currentFieldDirectory = tboxFieldName.Text.Trim() + String.Format("{0}", DateTime.Now.ToString("-yyyy.MMM.dd HH_mm", CultureInfo.InvariantCulture));
//get the directory and make sure it exists, create if not
string dirNewField = mf.fieldsDirectory + mf.currentFieldDirectory + "\\";
//if no template set just make a new file.
if (!isTemplateSet)
{
try
{
//start a new job
mf.JobNew();
//create it for first save
string directoryName = Path.GetDirectoryName(dirNewField);
if ((!string.IsNullOrEmpty(directoryName)) && (Directory.Exists(directoryName)))
{
MessageBox.Show("Choose a different name", "Directory Exists", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return;
}
else
{
//reset the offsets
mf.pn.utmEast = (int)mf.pn.actualEasting;
mf.pn.utmNorth = (int)mf.pn.actualNorthing;
mf.worldGrid.CreateWorldGrid(0, 0);
//make sure directory exists, or create it
if ((!string.IsNullOrEmpty(directoryName)) && (!Directory.Exists(directoryName)))
{
Directory.CreateDirectory(directoryName);
}
//create the field file header info
mf.FileCreateField();
mf.FileCreateSections();
//mf.FileCreateRecPath();
mf.FileCreateContour();
//mf.FileSaveABLine();
}
}
catch (Exception ex)
{
mf.WriteErrorLog("Creating new field " + ex);
MessageBox.Show("Error", ex.ToString());
mf.currentFieldDirectory = "";
}
}
else
{
// create from template
string directoryName = Path.GetDirectoryName(dirNewField);
if ((!string.IsNullOrEmpty(directoryName)) && (Directory.Exists(directoryName)))
{
MessageBox.Show("Choose a different name", "Directory Exists", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return;
}
else
{
//create the new directory
if ((!string.IsNullOrEmpty(directoryName)) && (!Directory.Exists(directoryName)))
{
Directory.CreateDirectory(directoryName);
}
}
string line;
string offsets;
using (StreamReader reader = new StreamReader(templateFileAndDirectory))
{
try
{
line = reader.ReadLine();
line = reader.ReadLine();
line = reader.ReadLine();
line = reader.ReadLine();
//read the Offsets - all we really need from template field file
offsets = reader.ReadLine();
}
catch (Exception ex)
{
mf.WriteErrorLog("While Opening Field" + ex);
var form = new FormTimedMessage(4000, "Field File is Corrupt", "Choose a different field");
form.Show();
mf.JobClose();
return;
}
const string myFileName = "Field.txt";
using (StreamWriter writer = new StreamWriter(dirNewField + myFileName))
{
//Write out the date
writer.WriteLine(DateTime.Now.ToString("yyyy-MMMM-dd hh:mm:ss tt", CultureInfo.InvariantCulture));
writer.WriteLine("$FieldDir");
writer.WriteLine(mf.currentFieldDirectory.ToString(CultureInfo.InvariantCulture));
//write out the easting and northing Offsets
writer.WriteLine("$Offsets");
writer.WriteLine(offsets);
}
//create blank Contour and Section files
mf.FileCreateSections();
mf.FileCreateContour();
//copy over the files from template
string templateDirectoryName = Path.GetDirectoryName(templateFileAndDirectory);
string fileToCopy = templateDirectoryName + "\\Boundary.txt";
string destinationDirectory = directoryName + "\\Boundary.txt";
if (File.Exists(fileToCopy))
{
File.Copy(fileToCopy, destinationDirectory);
}
fileToCopy = templateDirectoryName + "\\Headland.txt";
destinationDirectory = directoryName + "\\Headland.txt";
if (File.Exists(fileToCopy))
{
File.Copy(fileToCopy, destinationDirectory);
}
fileToCopy = templateDirectoryName + "\\Flags.txt";
destinationDirectory = directoryName + "\\Flags.txt";
if (File.Exists(fileToCopy))
{
File.Copy(fileToCopy, destinationDirectory);
}
fileToCopy = templateDirectoryName + "\\ABLine.txt";
destinationDirectory = directoryName + "\\ABLine.txt";
if (File.Exists(fileToCopy))
{
File.Copy(fileToCopy, destinationDirectory);
}
fileToCopy = templateDirectoryName + "\\RecPath.txt";
destinationDirectory = directoryName + "\\RecPath.txt";
if (File.Exists(fileToCopy))
{
File.Copy(fileToCopy, destinationDirectory);
}
//now open the newly cloned field
mf.FileOpenField(dirNewField + myFileName);
}
}
DialogResult = DialogResult.OK;
Close();
}