I wrote a program that gets the name, family and age of student, saves them in the database and shows them in DataGridView
. I can see added student after adding it in DatagridView
but I can't click it. Error is index out of range (index -1 does not have value)
private void btnRegister_Click(object sender, EventArgs e)
{
try
{
string name = txtName.Text;
string family = txtFamily.Text;
int age = int.Parse(txtAge.Text);
foreach (var item in Database.tbl_student)
{
if (item.Name.Trim().ToLower().Equals(name.Trim().ToLower())
&& item.Family.Trim().ToLower().Equals(family.Trim().ToLower()))
{
MessageBox.Show("this student is duplicate..");
return;
}
}
Database.tbl_student.Add(new Student() { Name = name, Family = family, Age = age });
dataGridView1.DataSource = null;
dataGridView1.DataSource = Database.tbl_student;
} catch(Exception error)
{
MessageBox.Show(error.Message);
}
}