//add books to user's borrowed book list
protected void GridView_Book_RowCommand(object sender, GridViewCommandEventArgs e)
{
conn = new OleDbConnection(connectionString);
string bookID = null;
try
{
if (e.CommandName == "BorrowBook")
{
string bookTitle = e.CommandArgument.ToString();
conn.Open();
cmd = new OleDbCommand("Select ID FROM Book where BookName='" + bookTitle + "'", conn);
int x = (int)cmd.ExecuteScalar();
if (x != 0)
{
bookID = cmd.ExecuteScalar().ToString();
}
OleDbCommand insertIntoBorrowedBooks = new OleDbCommand("insert into BorrowedBook([BorrowedBookID],[BorrowedUserID],[State],[BorrowDate]) values (?,?,?,?)", conn);
insertIntoBorrowedBooks.Parameters.Add(new OleDbParameter("BorrowedBookID", int.Parse(bookID)));
insertIntoBorrowedBooks.Parameters.Add(new OleDbParameter("BorrowedUserID", int.Parse(Session["userID"].ToString())));
insertIntoBorrowedBooks.Parameters.Add(new OleDbParameter("State", OleDbType.Boolean)).Value = true;
insertIntoBorrowedBooks.Parameters.Add(new OleDbParameter("BorrowDate", OleDbType.Date)).Value = System.DateTime.Now;
insertIntoBorrowedBooks.ExecuteNonQuery();
conn.Close();
GridView_Book.DataBind();
}
}
catch (Exception exp1)
{
Label2.Text = exp1.Message;
}
}
protected void btn_addBook_Click(object sender, EventArgs e)
{
OleDbConnection connection = new OleDbConnection(connectionString);
try
{
connection.Open();
OleDbCommand insert = new OleDbCommand();
insert.Connection = connection;
insert.CommandType = CommandType.Text;
insert.CommandText = "insert into Book ([BookName],[BookAuthor],[BookPublishedIn],[ISBN],[BookEdition],[BookCategory]) values (?,?,?,?,?,?)";
insert.Parameters.Add(new OleDbParameter("BookName", txt_bookTitle.Text));
insert.Parameters.Add(new OleDbParameter("BookAuthor", txt_bookAuthor.Text));
insert.Parameters.Add(new OleDbParameter("BookPublishedIn", int.Parse(txt_year.Text)));
insert.Parameters.Add(new OleDbParameter("ISBN", int.Parse(txt_isbn.Text)));
insert.Parameters.Add(new OleDbParameter("BookEdition", txt_volume.Text));
insert.Parameters.Add(new OleDbParameter("BookCategory", int.Parse(droplist_bookCategory.SelectedValue)));
insert.ExecuteNonQuery();
lbl_errorAddBook.Text = "Successfully added a new book!";
connection.Close();
GridView_Book.DataBind();
}
catch
{
}
}
protected void BookViewTypes_SelectedIndexChanged(object sender, EventArgs e)
{
if (BookViewTypes.SelectedValue == "AllBook")
{
GridView_Book.DataSourceID = "DataSource_AllBook";
GridView_Book.DataBind();
//disable the borrowed books
foreach (GridViewRow row in GridView_Book.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
string bookTitle = row.Cells[1].Text;
if (bookTitle != null && bookIsBorrowed(bookTitle) == true)
{
LinkButton theButton = (LinkButton)row.FindControl("btn_borrowBook");
if (theButton != null)
{
theButton.Enabled = false;
theButton.Text = "Borrowed";
}
}
}
}
}
if (BookViewTypes.SelectedValue == "AvailableBook")
{
GridView_Book.DataSourceID = "DataSource_AvailableBook";
GridView_Book.DataBind();
//for all available book make enable borrow book button
foreach (GridViewRow row in GridView_Book.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
LinkButton theLinkButton = (LinkButton)row.FindControl("btn_borrowBook");
if (theLinkButton != null)
{
theLinkButton.Enabled = true;
}
}
}
}
if (BookViewTypes.SelectedValue == "BorrowedBook")
{
GridView_Book.DataSourceID = "DataSource_BorrowedBook";
GridView_Book.DataBind();
//for all borrowed book show that its borrowed and disable the borrow book button
foreach (GridViewRow row in GridView_Book.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
LinkButton theButton = (LinkButton)row.FindControl("btn_borrowBook");
if (theButton != null)
{
theButton.Enabled = false;
theButton.Text = "Borrowed";
}
}
}
}
}
