private void JO_Tool_ReadAuthors_Click(object sender, EventArgs e)
{
//If setup for grid has already been done, just refresh the grid.
if (_gridSetupDone == true)
{
RefreshGrid();
return;
}
JO_DataGrid_Authors.AutoGenerateColumns = false;
JO_DataGrid_Authors.ColumnCount = 3;
JO_DataGrid_Authors.DataSource = BiblioQueries.GetAuthors(connection);
//Hide author id row for later to use.
JO_DataGrid_Authors.Columns[0].Name = "AuthorID";
JO_DataGrid_Authors.Columns[0].DataPropertyName = "AuthorID";
JO_DataGrid_Authors.Columns[0].Visible = false;
JO_DataGrid_Authors.Columns[1].Name = "Name";
JO_DataGrid_Authors.Columns[1].DataPropertyName = "Name";
JO_DataGrid_Authors.Columns[2].Name = "Year Born";
JO_DataGrid_Authors.Columns[2].DataPropertyName = "YearBorn";
_gridSetupDone = true;
}
private void JO_Btn_Insert_Click(object sender, EventArgs e)
{
Author author = new Author();
author.Name = JO_TextBox_Author.Text;
author.YearBorn = JO_TxtBoxYearBorn.Text;
BiblioQueries.InsertToDatabase(author, connection);
SyncAuthors();
}
private void JO_Btn_Delete_Click(object sender, EventArgs e)
{
Author author = (Author)JO_ListBox_Authors.SelectedItem;
//Sync authors list only when DeleteAuthor successfully deleted a record
if (BiblioQueries.DeleteAuthor(author.AuthorID, connection) == true)
{
SyncAuthors();
}
}
private void JO_Btn_Titles_Click(object sender, EventArgs e)
{
int rowIndex = JO_DataGrid_Authors.SelectedCells[0].RowIndex;
int authorID = (int)JO_DataGrid_Authors.Rows[rowIndex].Cells["AuthorID"].Value;
JO_DataGrid_Titles.Rows.Clear();
foreach (string item in BiblioQueries.GetTitles(authorID, connection))
{
JO_DataGrid_Titles.Rows.Add(item);
}
}
private void JO_Btn_Update_Click(object sender, EventArgs e)
{
Author oldAuthor = (Author)JO_ListBox_Authors.SelectedItem;
Author newAuthor = new Author();
newAuthor.Name = JO_TextBox_Author.Text;
newAuthor.YearBorn = JO_TxtBoxYearBorn.Text;
BiblioQueries.UpdateAuthor(oldAuthor.AuthorID, newAuthor, connection);
SyncAuthors();
}
private void SyncAuthors()
{
var watch = System.Diagnostics.Stopwatch.StartNew();
JO_ListBox_Authors.DataSource = BiblioQueries.GetAuthors(connection);
JO_Lbl_AuthorsCount.Text = JO_ListBox_Authors.Items.Count.ToString();
watch.Stop();
var elapsedMs = watch.ElapsedMilliseconds;
JO_Lbl_AuthorsTimeTaken.Text = elapsedMs.ToString() + " ms";
}
private void JO_DataGrid_Authors_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
int rowIndex = e.RowIndex;
Author author = new Author();
author.AuthorID = (int)JO_DataGrid_Authors.Rows[rowIndex].Cells["AuthorID"].Value;
if (JO_DataGrid_Authors.Rows[rowIndex].Cells["Name"].Value == null)
{
BiblioQueries.DeleteAuthor(author.AuthorID, connection);
RefreshGrid();
}
else
{
author.Name = JO_DataGrid_Authors.Rows[rowIndex].Cells["Name"].Value.ToString();
author.YearBorn = JO_DataGrid_Authors.Rows[rowIndex].Cells["Year Born"].Value.ToString();
BiblioQueries.UpdateAuthor(author.AuthorID, author, connection);
}
}
private void JO_Btn_Titles_Click(object sender, EventArgs e)
{
if (JO_ListBox_Authors.SelectedIndex == -1)
{
return;
}
var watch = System.Diagnostics.Stopwatch.StartNew();
Author author = (Author)JO_ListBox_Authors.SelectedItem;
JO_ListBox_Titles.DataSource = BiblioQueries.GetTitles(author.AuthorID, connection);
var elapsedMs = watch.ElapsedMilliseconds;
JO_Lbl_TitlesTimeTaken.Text = elapsedMs.ToString() + " ms";
JO_Lbl_TitlesCount.Text = JO_ListBox_Titles.Items.Count.ToString();
JO_ListBox_Titles.SelectedIndex = -1;
}
private void RefreshGrid()
{
JO_DataGrid_Authors.DataSource = BiblioQueries.GetAuthors(connection);
}
