//enables te add guardian button and disables the view guardian button if guardian already exists for the 'i' student and viceversa
private void RowWork()
{
if (GridView1.DataSource != null)
{
using (SampleDataContext context = new SampleDataContext())
{
for (int i = 0; i < GridView1.Rows.Count; i++)
{
LinkButton lb_add = (LinkButton)GridView1.Rows[i].FindControl("AddGuardian");
int id = Convert.ToInt32(lb_add.CommandArgument);
LinkButton lb_view = (LinkButton)GridView1.Rows[i].FindControl("ViewSingleGuardian");
guardian g_check = context.guardians.Where(x => x.std_id == id).SingleOrDefault();
if (g_check != null)
{
lb_add.Enabled = false;
lb_view.Enabled = true;
}
else
{
lb_add.Enabled = true;
lb_view.Enabled = false;
}
}
}
}
}
private void Update(int id)
{
using (SampleDataContext context = new SampleDataContext())
{
guardian g = context.guardians.Where(x => x.id == id).SingleOrDefault();
int s_id = Convert.ToInt32(txtStd_id.Text);
if (context.students.Where(x => x.std_id == s_id).Single() != null)
{
g.g_Fname = txtFname.Text;
g.g_Lname = txtLname.Text;
g.g_Address = txtAddress.Text;
g.std_id = s_id;
context.SubmitChanges();
GetData();
Clear();
}
else
{
Response.Write("<script>alert('Student ID Not Found!!')</script>");
}
}
}
protected void dltGuardian_Click(object sender, EventArgs e)
{
int i = Convert.ToInt32((sender as LinkButton).CommandArgument);
using (SampleDataContext context = new SampleDataContext())
{
guardian g = context.guardians.Where(x => x.id == i).SingleOrDefault();
g.std_id = null;
context.SubmitChanges();
context.guardians.DeleteOnSubmit(g);
context.SubmitChanges();
GridView2.DataSource = null;
}
GetData();
Clear();
}
protected void updGuardian_Click(object sender, EventArgs e)
{
hf1.Value = (sender as LinkButton).CommandArgument;
int i = Convert.ToInt32(hf1.Value);
btn_Update.Enabled = true;
using (SampleDataContext context = new SampleDataContext())
{
guardian g = context.guardians.Where(x => x.id == i).Single();
if (g != null)
{
txtFname.Text = g.g_Fname;
txtLname.Text = g.g_Lname;
txtAddress.Text = g.g_Address;
txtStd_id.Text = g.std_id.ToString();
}
}
}
protected void Delete_Click(object sender, EventArgs e)
{
HideGrid();
hf1.Value = (sender as LinkButton).CommandArgument;
i = Convert.ToInt32(hf1.Value);
using (SampleDataContext context = new SampleDataContext())
{
guardian g = context.guardians.Where(x => x.std_id == i).SingleOrDefault();
if (g != null)
{
g.std_id = null;
context.SubmitChanges();
}
student std = context.students.SingleOrDefault(x => x.std_id == i);
context.students.DeleteOnSubmit(std);
context.SubmitChanges();
Clear();
GetData();
}
}
protected void adGuardianBtn_Click(object sender, EventArgs e)
{
if (isValid())
{
using (SampleDataContext dbcontext = new SampleDataContext())
{
guardian newg = new guardian()
{
g_Fname = txtGuardianFName.Text,
g_Lname = txtGuardianLname.Text,
g_Address = txtGuardianAddress.Text,
std_id = Convert.ToInt32(hf2.Value)
};
dbcontext.guardians.InsertOnSubmit(newg);
dbcontext.SubmitChanges();
Response.Redirect("~/Guardian.aspx");
}
}
else
{
Response.Write("<script>alert('Cannot Process Request due to validation error')</script>");
}
}
private void detach_guardians(guardian entity)
{
this.SendPropertyChanging();
entity.student = null;
}
private void attach_guardians(guardian entity)
{
this.SendPropertyChanging();
entity.student = this;
}
partial void Deleteguardian(guardian instance);
partial void Updateguardian(guardian instance);
partial void Insertguardian(guardian instance);
