private void btnSave_Click(object sender, EventArgs e)
{
try
{
errorProvider.SetError(txtRelationName, null);
if (txtRelationName.Text.Trim().Length <= 0)
{
errorProvider.SetError(txtRelationName, "You must enter a relation name, please try again !");
return;
}
if (txtRelationName.Text.ToLower() == "select" || txtRelationName.Text.ToLower() == "from" || txtRelationName.Text.ToLower() == "where")
{
errorProvider.SetError(txtRelationName, "Relation name is not valid ( not match with keyword 'select', 'from', 'where') ");
return;
}
foreach (var item in this.probDatabase.ListOfRelationNameToLower())
{
if (item.Equals(txtRelationName.Text.ToLower(), StringComparison.OrdinalIgnoreCase))
{
errorProvider.SetError(txtRelationName, "This relation name has already existed in the database, please try again !");
return;
}
}
ProbScheme scheme = this.probDatabase.Schemes.SingleOrDefault(c => c.SchemeName.ToLower() == cbo_SchemeName.Properties.Items[cbo_SchemeName.SelectedIndex].ToString());
ProbRelation relation = new ProbRelation();
relation.RelationName = txtRelationName.Text.ToLower();
relation.Scheme = scheme;
relation.InsertSystemRelation();
relation.CreateTableRelation();
this.probDatabase.Relations.Add(relation);
if (MessageBox.Show("Add successfully.Do you want add a new relation name ?", "Question", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes)
{
txtRelationName.Focus();
txtRelationName.Text = null;
this.frm__new_relation_Load(sender, e);
}
else
{
this.Close();
}
}
catch (Exception EX)
{
MessageBox.Show(EX.Message);
}
}
private void btnSave_Click(object sender, EventArgs e)
{
errorProvider.SetError(txtNewNameRelation, null);
if (txtNewNameRelation.Text.Trim().Length <= 0)
{
errorProvider.SetError(txtNewNameRelation, "You did not enter a relation name");
return;
}
if (txtNewNameRelation.Text.ToLower() == "select" || txtNewNameRelation.Text.ToLower() == "from" || txtNewNameRelation.Text.ToLower() == "where")
{
errorProvider.SetError(txtNewNameRelation, "Relation name is not valid ( not match with keyword 'select', 'from', 'where') ");
return;
}
if (this.CurrentNameRelation == txtNewNameRelation.Text.Trim().ToLower())
{
return;
}
if (this.CurrentNameRelation != txtNewNameRelation.Text.Trim().ToLower())
{
foreach (var item in this.probDatabase.ListOfRelationNameToLower())
{
if (item.Equals(txtNewNameRelation.Text.ToLower()))
{
errorProvider.SetError(txtNewNameRelation, "This relation name has already existed in the database ");
return;
}
}
}
ProbRelation relation = this.probDatabase.Relations.SingleOrDefault(c => c.RelationName.ToLower() == CurrentNameRelation);
this.probDatabase.Relations.Remove(relation);
relation.DropTableByTableName();
relation.DeleteRelationById();
relation.RelationName = txtNewNameRelation.Text.Trim();
relation.InsertSystemRelation();
relation.CreateTableRelation();
relation.InsertTupleIntoTableRelation();
this.probDatabase.Relations.Add(relation);
MessageBox.Show("Rename relation successful", "Notification", MessageBoxButtons.OK, MessageBoxIcon.Information);
this.Close();
}
