/// <summary>
/// Prompts the user for an integer with the question specified. It does all the data
/// validation required and doesn't return until the user provides a valid input.
/// </summary>
/// <param name="mainQuestion">The main question to ask</param>
/// <param name="promptText">The string to prompt the user with. eg. Amount: </param>
/// <returns>A MenuReturn with the entered value stored as the value</returns>
public static MenuReturn <int> PromptInt(string mainQuestion, string promptText)
{
MenuReturn <int> result = new MenuReturn <int>(false, 0);
bool canContinue = false;
while (!canContinue)
{
Console.WriteLine("\n{0}", mainQuestion);
Console.WriteLine("Type '!back' to go back");
Console.Write(promptText);
string input = Console.ReadLine();
if (input == "!back")
{
Console.Clear();
canContinue = true;
}
else
{
try
{
int amount = int.Parse(input);
canContinue = true;
result = new MenuReturn <int>(true, amount);
}
catch
{
PrintError("Please enter an integer");
}
}
}
return(result);
}
/// <summary>
/// Prompts the user for an char with the question specified. It does all the data
/// validation required and doesn't return until the user provides a valid input.
/// </summary>
/// <param name="mainQuestion">The main question to ask</param>
/// <param name="promptText">The string to prompt the user with. eg. Amount: </param>
/// <returns>A MenuReturn with the entered value stored as the value</returns>
public static MenuReturn <char> PromptChar(string mainQuestion, string promptText)
{
bool canContinue = false;
MenuReturn <char> result = new MenuReturn <char>(false, ' ');
while (!canContinue)
{
Console.WriteLine("\n{0}", mainQuestion);
Console.WriteLine("Type '!back' to go back");
Console.Write(promptText);
string input = Console.ReadLine();
if (input == "!back")
{
Console.Clear();
canContinue = true;
}
else
{
try
{
char choice = input.ToLower()[0];
canContinue = true;
result = new MenuReturn <char>(true, choice);
}
catch
{
PrintError("Please enter a character");
}
}
}
return(result);
}
/// <summary>
/// Prompts the user for an string with the question specified. It does all the data
/// validation required and doesn't return until the user provides a valid input.
/// </summary>
/// <param name="mainQuestion">The main question to ask</param>
/// <param name="promptText">The string to prompt the user with. eg. Amount: </param>
/// <returns>A MenuReturn with the entered value stored as the value</returns>
public static MenuReturn <string> PromptString(string mainQuestion, string promptText)
{
MenuReturn <string> result = new MenuReturn <string>(false, "");
bool canContinue = false;
while (!canContinue)
{
Console.WriteLine("\n{0}", mainQuestion);
Console.WriteLine("Type '!back' to go back");
Console.Write(promptText);
string input = Console.ReadLine();
if (input == "!back")
{
Console.Clear();
canContinue = true;
}
else
{
result = new MenuReturn <string>(true, input);
canContinue = true;
}
}
return(result);
}
/// <summary>
/// Runs the prompt string method with the specified mainQuestion and promptText. It also takes one condition to be tested
/// along side the regular validation. It will not leave while the condition is satisfied. If the condition is satisfied
/// it prints the condition error.
///
/// Reasoning behind this:
/// I got really tired of data validation in my menu's so I started by creating the basic PromptInt, PromptDouble, etc.
/// Those worked great and made my menu's much simpler, but I noticed that with almost all my menus I was also testing
/// one additional condition that need to be satisfied and loop until its satisfied. So I added these methods to allow
/// for the conditions. It really cleaned up (I think) my menu page code.
/// </summary>
/// <param name="mainQuestion">The main question to ask</param>
/// <param name="promptText">The string to prompt the user with. eg. Amount: </param>
/// <param name="condition">The condition to test against. If this condition is SATISFIED it will print an error, otherwise it returns the result</param>
/// <param name="conditionError">The error to print when the condition is satisfied</param>
/// <returns>A MenuReturn with the entered value stored as the value</returns>
public static MenuReturn <string> PromptString(string mainQuestion, string promptText, Func <string, bool> condition, string conditionError)
{
bool canContinue = false;
MenuReturn <string> result = new MenuReturn <string>(false, "");
while (!canContinue)
{
result = PromptString(mainQuestion, promptText);
if (result.Continue && condition(result.Value))
{
PrintError(conditionError);
}
else //Exit
{
canContinue = true;
}
}
return(result);
}
