private async Task <bool> BookFetching()
{
_listOfISBN.Clear();
foreach (var isbn in ISBN_List_Class.GetISBN_List())
{
FirstRootObject listOfBooks = await FirstScreen_class.GetFirst_details(Convert.ToString(isbn), "ISBN");
foreach (var item in listOfBooks.items)
{
try
{
_listOfISBN.Add(
new FirstBookList_Class
{
smallthumbnail = (string.IsNullOrEmpty(item.volumeInfo.imageLinks.smallThumbnail)) ?
"Null value" : Convert.ToString(item.volumeInfo.imageLinks.smallThumbnail),
category = (string.IsNullOrEmpty(string.Join(" ", item.volumeInfo.categories))) ?
"cant access" : string.Join(" ", item.volumeInfo.categories),
PDFAvailable = (string.IsNullOrEmpty(Convert.ToString(item.accessInfo.pdf.isAvailable))) ?
false : Convert.ToBoolean(item.accessInfo.pdf.isAvailable),
title = (string.IsNullOrEmpty(item.volumeInfo.title)) ?
"not available" : Convert.ToString(item.volumeInfo.title).Trim(),
textSnippet = (string.IsNullOrEmpty(Convert.ToString(item.searchInfo.textSnippet))) ?
"Not available" : Convert.ToString(item.searchInfo.textSnippet),
//textSnippet= item.searchInfo.textSnippet,
previewLink = (item.volumeInfo.previewLink == null) ?
"not available" : Convert.ToString(item.volumeInfo.previewLink),
ID = item.id,
ISBN_number = (string.IsNullOrEmpty(String.Join(" ", item.volumeInfo.industryIdentifiers[0].identifier)) ?
"Not available" : String.Join(" ", item.volumeInfo.industryIdentifiers[0].identifier))
//ISBN_number = Convert.ToString(isbn)
//textSnippet= item.searchInfo.textSnippet
}
);
}
catch (Exception)
{
continue;
}
}
}
return(true);
}
private async Task SearchedBookFetch(string searchText)
{
FirstRootObject listOfBooks = await FirstScreen_class.GetFirst_details(searchText, "Text");
_listOfISBN.Clear();
if (listOfBooks.totalItems != 0)
{
foreach (var item in listOfBooks.items)
{
try
{
_listOfISBN.Add(
new FirstBookList_Class
{
smallthumbnail = (string.IsNullOrEmpty(item.volumeInfo.imageLinks.smallThumbnail)) ?
"Null value" : Convert.ToString(item.volumeInfo.imageLinks.smallThumbnail),
category = (string.IsNullOrEmpty(string.Join(" ", item.volumeInfo.categories))) ?
"cant access" : string.Join(" ", item.volumeInfo.categories),
PDFAvailable = (string.IsNullOrEmpty(Convert.ToString(item.accessInfo.pdf.isAvailable))) ?
false : Convert.ToBoolean(item.accessInfo.pdf.isAvailable),
title = (string.IsNullOrEmpty(item.volumeInfo.title)) ?
"not available" : Convert.ToString(item.volumeInfo.title).Trim(),
textSnippet = (string.IsNullOrEmpty(Convert.ToString(item.searchInfo.textSnippet))) ?
"Not available" : Convert.ToString(item.searchInfo.textSnippet),
previewLink = (item.volumeInfo.previewLink == null) ?
"not available" : Convert.ToString(item.volumeInfo.previewLink),
ID = item.id,
ISBN_number = (string.IsNullOrEmpty(String.Join(" ", item.volumeInfo.industryIdentifiers[0].identifier)) ?
"Not available" : String.Join(" ", item.volumeInfo.industryIdentifiers[0].identifier))
//textSnippet= item.searchInfo.textSnippet
}
);
}
catch (Exception)
{
continue;
}
}
}
else
{
await DisplayAlert("Result not found", "Please try another/valid search", "ok");
}
}