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Documentation and code cleanup/organization

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This commit is contained in:
kougyokugentou 2020-05-01 21:56:24 -07:00
parent 9b34935a47
commit ac449d5224
2 changed files with 91 additions and 36 deletions
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58
Form1.cs
View File

@ -177,8 +177,11 @@ namespace DBWizard
}
}
//Convert student photo to byte array for saving to db.
//Also used to see if the photo is too large for the db blob type.
/* Convert student photo to byte array for saving to db.
* Also used to see if the photo is too large for the db blob type.
* INPUT: Object
* OUPUT byte[] array
*/
private byte[] ObjectToByteArray(Object obj)
{
if (obj == null)
@ -191,8 +194,11 @@ namespace DBWizard
return ms.ToArray();
}
//Convert student photo from byte array to object.
// Convert a byte array to an Object
/* Convert student photo from byte array to object.
* Convert a byte array to an Object
* INPUT: byte[] array
* OUTPUT: object
*/
private Object ByteArrayToObject(byte[] arrBytes)
{
@ -217,6 +223,7 @@ namespace DBWizard
errorProvider1.SetError(tb, "");
}
//Validates any given combobox to ensure an item is selected.
private void ComboBox_Validating(object sender, CancelEventArgs e)
{
ComboBox cb = (ComboBox)sender;
@ -241,6 +248,9 @@ namespace DBWizard
{ errorProvider1.SetError(phoneNumberNumericUpDown, ""); }
}
/* Checks to see if provided email address is valid
* by matching against an email address regex i stole from the interweb.
*/
private void emailAddressTextBox_Validating(object sender, CancelEventArgs e)
{
//email address regex
@ -251,6 +261,11 @@ namespace DBWizard
errorProvider1.SetError(emailAddressTextBox, "");
}
/* Validation of DOB Date Time Picker does not really do any validation
* other than check the basic, most probable case of the date is still today.
* Yes, the Student can literally be born yesterday, and in 12th grade.
* Paradox, ahoy!
*/
private void dob_dateTimePicker_Validating(object sender, CancelEventArgs e)
{
if(dob_dateTimePicker.Value == DateTime.Now)
@ -259,6 +274,8 @@ namespace DBWizard
{ errorProvider1.SetError(dob_dateTimePicker, ""); }
}
//Since not sure if student ID textbox can contain numbers
//this is seperate from generic textbox which is only letters.
private void student_idTextBox_Validating(object sender, CancelEventArgs e)
{
TextBox tb = (TextBox)sender;
@ -276,12 +293,16 @@ namespace DBWizard
return;
}
//Button to clear the form, exactly as it says on the tin.
private void clear_button_Click(object sender, EventArgs e)
{
ClearForm();
}
// clears the form
/* clears the form
* Does this by looping through all the controls and setting them to null
* or to default values. Be sure to set student textbox tag to DefaultImage.
*/
private void ClearForm()
{
foreach(Control c in this.Controls)
@ -310,6 +331,8 @@ namespace DBWizard
nud.Value = nud.Minimum;
}
//Be sure to set the student textbox tag to DefaultImage
//or you will be in for a really bad time.
if(c is PictureBox)
{
PictureBox pb = (PictureBox)c;
@ -334,6 +357,7 @@ namespace DBWizard
} //ClearForm()
//Clears the found student combobox.
private void ClearFoundStudentsComboBox()
{
foundStudents_comboBox.DataSource = null;
@ -342,6 +366,11 @@ namespace DBWizard
foundStudents_comboBox.SelectedIndex = -1;
}
/* Implements main search functionality by taking in whatever
* is typed in the search box. If the enter key is pressed,
* will execute search of the db based on last name and return
* found results or not found to the foundStudents combobox.
*/
private void search_textBox_KeyDown(object sender, KeyEventArgs e)
{
List<Student> foundStudents = new List<Student>();
@ -364,7 +393,10 @@ namespace DBWizard
e.SuppressKeyPress = true;
}
//TODO:Populate the form based on the found student.
/* When the user clicks on a found student,
* automatically populate the form based on the found student
* and that student's parent.
*/
private void foundStudents_comboBox_SelectionChangeCommitted(object sender, EventArgs e)
{
Student foundStudent = foundStudents_comboBox.SelectedItem as Student;
@ -401,7 +433,13 @@ namespace DBWizard
phoneNumberNumericUpDown.Value = stuParent.PhoneNumber;
emailAddressTextBox.Text = stuParent.EmailAddress;
} //foundStudents_comboBox_SelectionChangeCommitted
/* Deletes a student.
* Note that you must FIRST, FIND the student, then click on them
* in the drop-down menu to have the form populate, then this
* function will work to delete both the student and the parent
* from the backend database.
*/
private void delete_button_Click(object sender, EventArgs e)
{
if (studentDbID.Value <= 0)
@ -420,6 +458,11 @@ namespace DBWizard
MessageBox.Show("Student deleted from database.");
}
#region redundancy
/* This whole region of code simply implements the File menu
* which only calls the previously programmed delegates for saving a student,
* or creating a new student. Henceforth, I present to you the redundancy region.
*/
private void exitWithoutSavingToolStripMenuItem_Click(object sender, EventArgs e)
{
Environment.Exit(0);
@ -443,5 +486,6 @@ namespace DBWizard
{
save_button_Click(save_button, EventArgs.Empty);
}
#endregion
} //Form1
}

69
SqliteDataAccess.cs
View File

@ -152,6 +152,24 @@ namespace DBWizard
// ***************** Read *****************
/* Gets a single Parent from the db given the parent_id db field.
* INPUT: int parent_id
* OUTPUT: Parent
*/
public Parent GetParentByID(int parent_id)
{
using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
{
string strQuery = "SELECT * FROM parents WHERE parent_id=@id;";
var output = cnn.Query<Parent>(strQuery, new { id = parent_id });
var parList = output.ToList();
Parent parent = parList[0];
return parent;
}
}
// ***************** Update *****************
/* Update a parent to the SQL database.
@ -182,6 +200,23 @@ namespace DBWizard
// ***************** Delete *****************
/* Deletes a parent record from the database.
* INPUT: Parent
* OUTPUT: void
*/
internal void DeleteParent(Parent par_in)
{
//protect query from 0 or negative indexes.
if (par_in.parent_id <= 0)
return;
using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
{
string strQuery = "DELETE FROM Parents WHERE parent_id=@parent_id;";
cnn.Execute(strQuery, par_in);
}
}
#endregion
#region Misc
@ -200,8 +235,10 @@ namespace DBWizard
}
}
#endregion
/* Returns the list of available schools from the DB to fill the Schools drop-down.
* INPUT: no args
* OUTPUT: List<School>
*/
internal List<School> GetSchools()
{
using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
@ -212,33 +249,7 @@ namespace DBWizard
return output.ToList();
}
}
public Parent GetParentByID(int parent_id)
{
using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
{
string strQuery = "SELECT * FROM parents WHERE parent_id=@id;";
var output = cnn.Query<Parent>(strQuery, new { id = parent_id });
var parList = output.ToList();
Parent parent = parList[0];
return parent;
}
}
internal void DeleteParent(Parent par_in)
{
//protect query from 0 or negative indexes.
if (par_in.parent_id <= 0)
return;
using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
{
string strQuery = "DELETE FROM Parents WHERE parent_id=@parent_id;";
cnn.Execute(strQuery, par_in);
}
}
#endregion
private static string LoadConnectionString(string id = "Default")
{