/// <summary>
/// Capture the click event for the solve button. This button will run the solution method for the
/// selected problem.
/// </summary>
/// <param name="sender">Built-in parameter.</param>
/// <param name="e">Built-in parameter.</param>
private void buttonSolve_Click(object sender, EventArgs e)
{
// Gather the input file string if necessary
ProjectEulerProblem myProblem = this.MyCurrentProblem();
string inputFile = null;
if (myProblem.RequiresInputFile)
{
inputFile = this.linkLabelInput.Text;
if (inputFile.Equals(InitialFileString))
{
inputFile = null;
}
}
// Run the solution algorithm
double timeToSolve;
string sol = myProblem.RunSolution(out timeToSolve, inputFile);
// Display solution
if (sol == null)
{
this.labelSolution.Text = InitialSolutionString;
this.labelTimeElapsed.Text = InitialSolutionString;
}
else
{
this.labelSolution.Text = sol;
this.labelTimeElapsed.Text = timeToSolve.ToString();
}
}
/// <summary>
/// Capture the selected index change event for the problem combobox. This will update the display
/// for controls below the combobox.
/// </summary>
/// <param name="sender">Built-in parameter.</param>
/// <param name="e">Built-in parameter.</param>
private void comboBoxProblem_SelectedIndexChanged(object sender, EventArgs e)
{
ProjectEulerProblem myProblem = this.MyCurrentProblem();
// Show/hide input file controls
bool showInput = myProblem.RequiresInputFile;
this.linkLabelInput.Visible = showInput;
this.labelStaticInput.Visible = showInput;
this.buttonInputFile.Visible = showInput;
this.linkLabelHyperlink.Text = myProblem.Hyperlink(); // Update hyperlink
// Update solution controls
this.labelSolution.Text = InitialSolutionString;
this.labelTimeElapsed.Text = InitialSolutionString;
}
/// <summary>
/// Capture the click event for the select input file button. This button allows the user to select
/// a new text file to be used as the input file for the selected problem.
/// </summary>
/// <param name="sender">Built-in parameter.</param>
/// <param name="e">Built-in parameter.</param>
private void buttonInputFile_Click(object sender, EventArgs e)
{
ProjectEulerProblem myProblem = this.MyCurrentProblem();
if (myProblem.RequiresInputFile) // Need user to select a file
{
// Set open file dialog properties
OpenFileDialog myOpenFileDialog = new OpenFileDialog();
if (this.linkLabelInput.Enabled) // already have a file selected so start there
{
myOpenFileDialog.InitialDirectory = Path.GetDirectoryName(this.linkLabelInput.Text);
}
myOpenFileDialog.Filter = "Text Files|*.txt"; // All inputs are text files
myOpenFileDialog.Multiselect = false;
myOpenFileDialog.Title = "Select Problem " + myProblem.ProblemNumber + " Input File";
// Show the dialog and check if user clicked OK.
if (myOpenFileDialog.ShowDialog() == DialogResult.OK)
{
this.linkLabelInput.Text = myOpenFileDialog.FileName;
this.linkLabelInput.Enabled = true; // Allow hyperlink
}
}
}
/// <summary>
/// Capture the click event for the file output button. This button exports the current solution to a .csv file.
/// </summary>
/// <param name="sender">Built-in parameter.</param>
/// <param name="e">Built-in parameter.</param>
private void buttonOutputFile_Click(object sender, EventArgs e)
{
// Set file dialog properties
OpenFileDialog myOpenFileDialog = new OpenFileDialog();
myOpenFileDialog.Filter = "Comma-Separated Values Files|*.csv"; // Only write CSV
myOpenFileDialog.Title = "Select Output File";
myOpenFileDialog.Multiselect = false;
// Show the dialog and check if user clicked OK.
if (myOpenFileDialog.ShowDialog() == DialogResult.OK)
{
// Determine whether to append or overwrite
bool append = false;
if (File.Exists(myOpenFileDialog.FileName))
{
DialogResult result = MessageBox.Show("Append to existing file contents? (Otherwise, file contents will be overwritten.)",
"File Append", MessageBoxButtons.YesNoCancel);
if (result == DialogResult.Yes)
{
append = true;
}
else if (result == DialogResult.No)
{
append = false;
}
else
{
return; // Early return
}
}
else
{
append = false;
}
// Write problem information to file
ProjectEulerProblem myProblem = this.MyCurrentProblem();
List <string> lines = new List <string>();
if (!append) // Write headers
{
lines.Add(string.Join(",", "Full Description", "Number", "Title", "Link",
"Solution", "Time To Solve"));
}
lines.Add(string.Join(",", myProblem.ToString(), myProblem.ProblemNumber, myProblem.Title,
this.linkLabelHyperlink.Text, this.labelSolution.Text, this.labelTimeElapsed.Text));
try
{
if (append)
{
File.AppendAllLines(myOpenFileDialog.FileName, lines);
}
else
{
File.WriteAllLines(myOpenFileDialog.FileName, lines);
}
}
catch // catch any IO exception - could make more specific in future iterations
{
MessageBox.Show("Unexpected error writing to file. Check file permissions and try again.", "Unexpected Error",
MessageBoxButtons.OK);
}
}
}
