private async Task <List <File> > GetGroupFilesAsync(Microsoft.Graph.IGroupFetcher groupFetcher, string groupMailNickname, Expression <Func <Microsoft.Graph.IItem, bool> > predicate)
{
var list = new List <File>();
Graph.IItem[] files = null;
try
{
var pagedCollection = predicate == null
? await groupFetcher.files.ExecuteAsync()
: await groupFetcher.files.Where(predicate).ExecuteAsync();
files = await pagedCollection.GetAllAsnyc();
}
catch
{
return(list);
}
foreach (var file in files)
{
var fileId = Regex.Match(file.eTag, @"{.*}").Captures[0].Value;
string url;
if (file.name.ToLower().Contains(".docx") || file.name.ToLower().Contains(".pptx") || file.name.ToLower().Contains(".xlsx"))
{
url = string.Format("{0}_layouts/15/WopiFrame.aspx?sourcedoc={1}&file={2}&action=default",
Regex.Match(file.webUrl, @"\S*/sites/\S*?/", RegexOptions.IgnoreCase).Captures[0].Value, fileId, file.name);
}
else
{
url = file.webUrl;
}
list.Add(new File
{
name = file.name,
webUrl = url,
dateTimeLastModified = file.dateTimeLastModified
});
}
return(list);
}
private async Task <List <File> > GetGroupFilesAsync(Microsoft.Graph.IGroupFetcher groupFetcher, string groupMailNickname)
{
return(await GetGroupFilesAsync(groupFetcher, groupMailNickname, null));
}