/// <summary>
/// method to load food items
/// </summary>
private void LoadFoods()
{
//declare food item variable and set it as a string with no text as default
string foodItem = "";
//string array to hold tokens as they are split
string[] splitFoodArray;
//local variable to assign food items from file to array index
int index = 0;
//declare streamreader variable
StreamReader inputFile;
//open file with streamreader
inputFile = File.OpenText(foodFileName);
//validate reading file
try
{
//put file contents into array
while (!inputFile.EndOfStream)
{
//loop through file and save each food item in variable
foodItem = inputFile.ReadLine();
//split string using comma
splitFoodArray = foodItem.Split(',');
//add only the name of the food from the array
lstBoxFoodItems.Items.Add(splitFoodArray[0]);
//add the food item
myFoods[index] = new FoodItem(splitFoodArray);
//increment index
index++;
}
//close file
inputFile.Close();
}
//error if reading failed
catch(Exception ex)
{
//display error if reading didn't succeed
MessageBox.Show("Sorry, couldn't read the file. \n\nCode: " + ex.Message + "\n\nPerhaps you haven't made a list of food on the Food Log page?", "Reading Error");
}
}
/// <summary>
/// click event for the add food button, adds food item to list box
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnAddFood_Click(object sender, EventArgs e)
{
//create new instance of FoodItem class
FoodItem myFood = new FoodItem();
//call validation method
if (CheckFood(myFood))
{
//adds items if valid, using ToString method from FoodItem class
lstBoxNutrition.Items.Add(myFood.ToString());
//clear textboxes
txtBoxCalories.Clear();
txtBoxFiber.Clear();
txtBoxFoodName.Clear();
txtBoxProtein.Clear();
txtBoxServings.Clear();
txtBoxSugars.Clear();
txtBoxSodium.Clear();
}
}
/// <summary>
/// method to validate user input
/// </summary>
/// <param name="myFood"></param>
/// <returns></returns>
private bool CheckFood(FoodItem myFood)
{
//create local variables for validation
int calorie;
double serving;
double sugar;
double protein;
double fiber;
double sodium;
//ensure a name has been input
if (txtBoxFoodName.Text != "")
{
//store food name in FoodItem class
myFood.FoodName = txtBoxFoodName.Text;
//ensure calories is a valid number and between a set value
if (int.TryParse(txtBoxCalories.Text, out calorie) && (calorie <= 1000 && calorie >= 0))
{
//store calories in FoodItem class
myFood.Calories = calorie;
//ensure servings is a valid number and between a set value
if (double.TryParse(txtBoxServings.Text, out serving) && (serving <= 5 && serving > 0))
{
//store servings in FoodItem class
myFood.Servings = serving;
//ensure sugars is a valid number and between a set value
if (double.TryParse(txtBoxSugars.Text, out sugar) && (sugar <= 100 && sugar >= 0))
{
//store sugars in FoodItem class
myFood.Sugars = sugar;
//ensure protein is a valid number and between a set value
if (double.TryParse(txtBoxProtein.Text, out protein) && (protein <= 60 && protein >= 0))
{
//store protein in FoodItem class
myFood.Protein = protein;
//ensure fiber is a valid number and between a set value
if (double.TryParse(txtBoxFiber.Text, out fiber) && (fiber <= 10 && fiber > 0))
{
//store fiber in FoodItem class
myFood.Fiber = fiber;
//ensure sodium is a valid number and between a set value
if (double.TryParse(txtBoxSodium.Text, out sodium) && (sodium <= 5 && sodium > 0))
{
//store sodium in FoodItem class and return true if all fields are valid
myFood.Sodium = sodium;
return true;
}
//display error if sodium is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for sodium, between 0 and 5 grams");
txtBoxSodium.Clear();
txtBoxSodium.Focus();
return false;
}
}
//display error if fiber is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for fiber, between 0 and 10 grams");
txtBoxFiber.Clear();
txtBoxFiber.Focus();
return false;
}
}
//display error if protein is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for protein, between 0 and 60 grams");
txtBoxProtein.Clear();
txtBoxProtein.Focus();
return false;
}
}
//display error if sugars is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for sugar, between 0 and 100 grams");
txtBoxSugars.Clear();
txtBoxSugars.Focus();
return false;
}
}
//display error if serving size is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for serving size, between 0 and 5");
txtBoxServings.Clear();
txtBoxServings.Focus();
return false;
}
}
//display error if calories is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for calories, between 0 and 1000");
txtBoxCalories.Clear();
txtBoxCalories.Focus();
return false;
}
}
//display error if food name is left blank
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a food name");
txtBoxFoodName.Clear();
txtBoxFoodName.Focus();
return false;
}
}
/// <summary>
/// click event for the add food button, adds food item to list box
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnAddFood_Click(object sender, EventArgs e)
{
//create new instance of FoodItem class
FoodItem myFood = new FoodItem();
//call validation method
if (CheckFood(myFood))
{
//adds items if valid, using ToString method from FoodItem class
lstBoxNutrition.Items.Add(myFood.ToString());
//clear textboxes
txtBoxCalories.Clear();
txtBoxFiber.Clear();
txtBoxFoodName.Clear();
txtBoxProtein.Clear();
txtBoxServings.Clear();
txtBoxSugars.Clear();
txtBoxSodium.Clear();
}
}
/// <summary>
/// method to validate user input
/// </summary>
/// <param name="myFood"></param>
/// <returns></returns>
private bool CheckFood(FoodItem myFood)
{
//create local variables for validation
int calorie;
double serving;
double sugar;
double protein;
double fiber;
double sodium;
//ensure a name has been input
if (txtBoxFoodName.Text != "")
{
//store food name in FoodItem class
myFood.FoodName = txtBoxFoodName.Text;
//ensure calories is a valid number and between a set value
if (int.TryParse(txtBoxCalories.Text, out calorie) && (calorie <= 1000 && calorie >= 0))
{
//store calories in FoodItem class
myFood.Calories = calorie;
//ensure servings is a valid number and between a set value
if (double.TryParse(txtBoxServings.Text, out serving) && (serving <= 5 && serving > 0))
{
//store servings in FoodItem class
myFood.Servings = serving;
//ensure sugars is a valid number and between a set value
if (double.TryParse(txtBoxSugars.Text, out sugar) && (sugar <= 100 && sugar >= 0))
{
//store sugars in FoodItem class
myFood.Sugars = sugar;
//ensure protein is a valid number and between a set value
if (double.TryParse(txtBoxProtein.Text, out protein) && (protein <= 60 && protein >= 0))
{
//store protein in FoodItem class
myFood.Protein = protein;
//ensure fiber is a valid number and between a set value
if (double.TryParse(txtBoxFiber.Text, out fiber) && (fiber <= 10 && fiber > 0))
{
//store fiber in FoodItem class
myFood.Fiber = fiber;
//ensure sodium is a valid number and between a set value
if (double.TryParse(txtBoxSodium.Text, out sodium) && (sodium <= 5 && sodium > 0))
{
//store sodium in FoodItem class and return true if all fields are valid
myFood.Sodium = sodium;
return(true);
}
//display error if sodium is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for sodium, between 0 and 5 grams");
txtBoxSodium.Clear();
txtBoxSodium.Focus();
return(false);
}
}
//display error if fiber is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for fiber, between 0 and 10 grams");
txtBoxFiber.Clear();
txtBoxFiber.Focus();
return(false);
}
}
//display error if protein is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for protein, between 0 and 60 grams");
txtBoxProtein.Clear();
txtBoxProtein.Focus();
return(false);
}
}
//display error if sugars is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for sugar, between 0 and 100 grams");
txtBoxSugars.Clear();
txtBoxSugars.Focus();
return(false);
}
}
//display error if serving size is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for serving size, between 0 and 5");
txtBoxServings.Clear();
txtBoxServings.Focus();
return(false);
}
}
//display error if calories is incorrect
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a valid value for calories, between 0 and 1000");
txtBoxCalories.Clear();
txtBoxCalories.Focus();
return(false);
}
}
//display error if food name is left blank
else
{
//display error message, clear field, set focus, and return false
MessageBox.Show("Enter a food name");
txtBoxFoodName.Clear();
txtBoxFoodName.Focus();
return(false);
}
}