You can use LINQ-to-DataSet with Enumerable.Any:
String author = "John Grisham";
bool contains = tbl.AsEnumerable().Any(row => author == row.Field<String>("Author"));
Another approach is to use DataTable.Select:
DataRow[] foundAuthors = tbl.Select("Author = '" + searchAuthor + "'");
if(foundAuthors.Length != 0)
{
// do something...
}
Q: what if we do not know the columns Headers and we want to find if any cell value
PEPSIexist in any rows'c columns? I can loop it all to find out but is there a better way? –
Yes, you can use this query:
DataColumn[] columns = tbl.Columns.Cast<DataColumn>().ToArray();
bool anyFieldContainsPepsi = tbl.AsEnumerable()
.Any(row => columns.Any(col => row[col].ToString() == "PEPSI"));
You should be able to use the DataTable.Select() method. You can us it like this.
if(myDataTable.Select("Author = '" + AuthorName.Replace("'","''") + '").Length > 0)
...
The Select() funciton returns an array of DataRows for the results matching the where statement.
You can use Linq. Something like:
bool exists = dt.AsEnumerable().Where(c => c.Field<string>("Author").Equals("your lookup value")).Count() > 0;
you could set the database as IEnumberable and use linq to check if the values exist. check out this link
LINQ Query on Datatable to check if record exists
the example given is
var dataRowQuery= myDataTable.AsEnumerable().Where(row => ...
you could supplement where with any
DataRow rw = table.AsEnumerable().FirstOrDefault(tt => tt.Field<string>("Author") == "Name");
if (rw != null)
{
// row exists
}
add to your using clause :
using System.Linq;
and add :
System.Data.DataSetExtensions
to references.
Source: Stackoverflow.com