private void ReadFromFile(string fileName)
{
try
{
//This allocates a new list to ShoalList, it resets already added contents to nothing by assigning it to a new list
ShoalList = new List <Shoal>();
using (StreamReader myInputStream
= new StreamReader(fileName))
{
string eachLine, headerLine;
if (!myInputStream.EndOfStream)
{
//Header Line or first line of file typically has column names or header names (no numeric data),
//so it must be treated different
//than other lines in the file
headerLine = myInputStream.ReadLine();
}
while (!myInputStream.EndOfStream)
{
eachLine = myInputStream.ReadLine();
double[] lowTides = new double[4];
double[] highTides = new double[4];
string[] fieldsArray = eachLine.Split(',');
string location = fieldsArray[0];
string state = fieldsArray[1];
double.TryParse(fieldsArray[2],
out double mileMarker);
string lowTidesStr = fieldsArray[3];
string highTidesStr = fieldsArray[4];
string[] lowTidesStrArray
= lowTidesStr.Split('-');
for (int i = 0; i < lowTidesStrArray.Length; i++)
{
double.TryParse(lowTidesStrArray[i],
out lowTides[i]);
}
string[] highTidesStrArray
= highTidesStr.Split('-');
for (int i = 0; i < highTidesStrArray.Length; i++)
{
double.TryParse(highTidesStrArray[i],
out highTides[i]);
}
Shoal eachShoal = new Shoal(location, state,
mileMarker, lowTides, highTides);
ShoalList.Add(eachShoal);
}
}
} catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void AddItem()
{
//This method gets all values from TextBoxes, converts numeric values into numbers from string
//got from Text property, create a shoal object, and then add it to the list
//you can add several else if for validation if you like
if (locationTextBox.Text == "")
{
MessageBox.Show("Location cannot be empty");
}
else
{
//Two New 4 element arrays to maintain low tide and high tide depths
double[] lowTides = new double[4];
double[] highTides = new double[4];
//mileMarker is int so needs to be parsed from Text property of mile marker text box
double mileMarker;
try
{
//just using Parse to show use with try catch. Better to use TryParse in c# though.
lowTides[0] = double.Parse(lowTidesTB1.Text);
lowTides[1] = double.Parse(lowTidesTB2.Text);
lowTides[2] = double.Parse(lowTidesTB3.Text);
lowTides[3] = double.Parse(lowTidesTB4.Text);
highTides[0] = double.Parse(highTidesTB1.Text);
highTides[1] = double.Parse(highTidesTB2.Text);
highTides[2] = double.Parse(highTidesTB3.Text);
highTides[3] = double.Parse(highTidesTB4.Text);
// mileMarker = double.Parse(mileMarkerTextBox.Text);
double.TryParse(mileMarkerTextBox.Text, out mileMarker); //example using TryParse
string location = locationTextBox.Text;
string state = stateTextBox.Text;
//creating a shoal object with all this information, check Shoal Class definition, and constructor definition to see
//how the constructor is used o create shoal object
Shoal eachShoal = new Shoal(location, state, mileMarker,
lowTides, highTides);
// MessageBox.Show(eachShoal.ToString());
//This shoal list maintains a list of shoal objects added so far.
ShoalList.Add(eachShoal); //no new list, list is created when Form1 is created
//ShoalList.Add("Any shoal"); //ShoalList can only have a shoal object added to it
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
private void UpdateItem()
{
int listIndex = outputListBox.SelectedIndex - 1;
if (listIndex < 0)
{
MessageBox.Show("Please select item from output listbox to update");
}
else
{
double[] lowTides = new double[4];
double[] highTides = new double[4];
double mileMarker;
try
{
double.TryParse(lowTidesTB1.Text, out lowTides[0]);
double.TryParse(lowTidesTB2.Text, out lowTides[1]);
double.TryParse(lowTidesTB3.Text, out lowTides[2]);
double.TryParse(lowTidesTB4.Text, out lowTides[3]);
double.TryParse(highTidesTB1.Text, out highTides[0]);
double.TryParse(highTidesTB2.Text, out highTides[1]);
double.TryParse(highTidesTB3.Text, out highTides[2]);
double.TryParse(highTidesTB4.Text, out highTides[3]);
mileMarker = double.Parse(mileMarkerTextBox.Text);
string location = locationTextBox.Text;
string state = stateTextBox.Text;
Shoal eachShoal = new Shoal(location, state, mileMarker,
lowTides, highTides);
// MessageBox.Show(eachShoal.ToString());
ShoalList[listIndex] = eachShoal;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
