public void AddressFormClosed()
{
//reset form and flags
addressIsOpen = false;
addressFrm = null;
//update results
//table name, field list, data grid
SelectResultsAndUpdateGrid("address", addressFieldList, address_dg);
}
private void insert_address_btn_Click(object sender, EventArgs e)
{
CloseAndNullAllSubforms();
//create new Mainform obejct to send to this form
//as refrence for addres form
MainForm newform = new MainForm();
newform = this;
//send form refrnce and set isnert flag to true
addressFrm = new AddressForm(ref newform, true);
//show and set open flag
addressFrm.Show();
addressIsOpen = true;
}
public void DeleteOrUpdateSelectedRow(string tableName, string idFieldName,
DataGridView datagridUpdate, bool isUpdate)
{
// check of rows in data grid
bool isSelected = false;
int rowId = 0;
int numRows = 0;
//number of rows in data grid
numRows = datagridUpdate.Rows.Count;
//loop though the rows
for (int i = 0; i < numRows; i++)
{
//of row selected in data grid
if (datagridUpdate.Rows[i].Selected)
{
rowId = i;
isSelected = true;
}
}
if (isSelected)
{
string idValue = datagridUpdate.Rows[rowId].Cells[0].Value.ToString();
//to debug comment / uncomment to show value of id selected
//we will send this value to the query method
//check if update or delete
if (isUpdate)
{
CloseAndNullAllSubforms();
//create new main form object to send to this
// as refrence to the student form
MainForm newform = new MainForm();
newform = this;
//send from refrence and set insert flag to false
//send id from selected row
switch (tableName)
{
case "student":
{
studentFrm = new StudentForm(ref newform, false, idValue);
//show form and set open flag
studentFrm.Show();
studentFrmIsOpen = true;
}
break;
case "user_account":
{
userAccountFrm = new UserAccountForm(ref newform, false, idValue);
//show form and set open flag
userAccountFrm.Show();
userAccountFrmIsOpen = true;
}
break;
case "staff":
{
staffFrm = new StaffForm(ref newform, false, idValue);
//show form and set open faLSE
staffFrm.Show();
staffFrmIsOpen = true;
}
break;
case "next_of_kin":
{
nextOfKinFrm = new NextOfKinForm(ref newform, false, idValue);
//show form and set open false
nextOfKinFrm.Show();
nextOfKinIsOpen = true;
}
break;
case "address":
{
addressFrm = new AddressForm(ref newform, false, idValue);
//show form and set open false
addressFrm.Show();
addressIsOpen = true;
}
break;
case "department":
{
depFrm = new DepartmentForm(ref newform, false, idValue);
//show form and set open false
depFrm.Show();
depIsOpen = true;
}
break;
case "job_role":
{
jobRoleFrm = new JobRoleForm(ref newform, false, idValue);
//show form and set open false
jobRoleFrm.Show();
jobRoleIsOpen = true;
}
break;
case "learning_aim":
{
learningAimFrm = new LearningAimForm(ref newform, false, idValue);
//show form and set open false
learningAimFrm.Show();
learningAimIsOpen = true;
}
break;
case "course":
{
courseFrm = new CourseForm(ref newform, false, idValue);
//show form and set open false
courseFrm.Show();
courseIsOpen = true;
}
break;
case "enrolment":
{
enrolmentFrm = new EnrolmentForm(ref newform, false, idValue);
//show form and set open false
enrolmentFrm.Show();
enrolmentIsOpen = true;
}
break;
}
}
else if (!isUpdate)
{
//calls delete row method on DB connection
//and sends the id value to selected row
mySqlSrc.DeleteRowWithId(tableName, idFieldName, idValue);
}
}
else
{
// if no row selcted disply to user
MessageBox.Show("No Row Selcted");
}
}
// method to manage subforms
private void CloseAndNullAllSubforms()
{
//check each form to see if open flag set
//if so close the form and null object (unset flag)
//STUDENT FORM
if (studentFrmIsOpen)
{
studentFrm.Close();
studentFrm = null;
studentFrmIsOpen = false;
}
//PRODUCT FORM
if (userAccountFrmIsOpen)
{
userAccountFrm.Close();
userAccountFrm = null;
userAccountFrmIsOpen = false;
}
//STAFF TABLE
if (staffFrmIsOpen)
{
staffFrm.Close();
staffFrm = null;
staffFrmIsOpen = false;
}
//NEXT OF KIN
if (nextOfKinIsOpen)
{
nextOfKinFrm.Close();
nextOfKinFrm = null;
nextOfKinIsOpen = false;
}
//ADDRESS TABLE
if (addressIsOpen)
{
addressFrm.Close();
addressFrm = null;
addressIsOpen = false;
}
//DEPARTMENT TABLE
if (depIsOpen)
{
depFrm.Close();
depFrm = null;
depIsOpen = false;
}
//JOB ROLE TABLE
if (jobRoleIsOpen)
{
jobRoleFrm.Close();
jobRoleFrm = null;
jobRoleIsOpen = false;
}
//LEARNING AIM TABLE
if (learningAimIsOpen)
{
learningAimFrm.Close();
learningAimFrm = null;
learningAimIsOpen = false;
}
//COURSE TABLE
if (courseIsOpen)
{
courseFrm.Close();
courseFrm = null;
courseIsOpen = false;
}
//ENROLEMT TANLE
if (enrolmentIsOpen)
{
enrolmentFrm.Close();
enrolmentFrm = null;
enrolmentIsOpen = false;
}
}