Develop Reference

Lucene .NET searching

Hi i am trying to make autocomplete system using Lucene library to search over 170K records.
But there is a litle problem.
For example when i search for Candice Gra(...), it brings records like
Candice Jackson
Candice Hamilton
Candice Hayes
Bu not Candice Graham to make Lucene find Candice Graham i need to type Candice Graham exactly.
Here is the code that i'm building query.
Directory directory = FSDirectory.Open(new DirectoryInfo(context.Server.MapPath("
ISet<string> stopWordSet = new HashSet<string>(stopWords);
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30, stopWordSet);
IndexReader indexReader = IndexReader.Open(directory, true);
Searcher indexSearch = new IndexSearcher(indexReader);
//Singe Field Search
var queryParser = new QueryParser(Version.LUCENE_30,
"Title",
analyzer);
string strQuery = string.Format("{0}", q);
var query = queryParser.Parse(strQuery);
If i build strQuery like this (* appended to the query)
string strQuery = string.Format("{0}*", q);
But using this way brings irrelevant records too.
For example if i search Candice Gra(...) again it returns records like
Grass
Gravity
Gray (etc.)
By the way i used KeywordAnalyzer and SimpleAnalyzer but these are not worked either.
Any ideas?

You should escape your spaces if you want them included in the search;
var query = queryParser.Parse(QueryParser.Escape(strQuery));

I think you need to put a AND keyword between these two words.
"Candice" AND "Gra"
http://lucene.apache.org/core/2_9_4/queryparsersyntax.html#AND

Linq 2 Sql - Getting the Id of the newly inserted row - Not working?

Lets assume this code:
Classified classified = new Classified();
classified.Title = title;
classified.IsActive = true;
user.Classifieds.Add(classified);
dContext.SubmitChanges();
Response.Redirect(string.Format("/classifieds/post/?cid=", classified.Id));
Well, classifiedId has no value, Since i am redirected to http://www.mysite.loc/classifieds/post/?cid=
anyone?

The problem is in your string format:
Response.Redirect(string.Format("/classifieds/post/?cid={0}", classified.Id));
You forgot to include the {0} so it knows where to place the ID.

Linq: Except(null)

I know the title of this question is obscure, but I don't know how to describe exactly just in a few words. What I want is to do a simple statistic on web page visitors. When people visi the page, it's IP will be stored in database, I count the IP to see how many visit times for a page, but I don't want to conclude my IP for sure. So my code is:
WebStatDataContext dc = new WebStatDataContext(_connString);
var query = from v in dc.VisitorInfos
where v.IP == "208.xxx.xxx.69"&&v.Site==site
select v.IP;
var all = from v1 in dc.VisitorInfos
where v1.Site==site
select v1.IP;
int result = all.Except(query).Count();
return result;
However, I found that it returns "1", if "query" is null. If "query" is not null, the result is correct. What happens here?

Filtering related data in a DataGridView

I have a DataGridView that pulls data from a couple tables similarly to this setup. It works great. Good post and answer. Continuing with the example in that post, I now want to create a filter that yields all transactions in the DataGridView that apply to a specific account by using a LIKE parameter on the account description.
I have a solution by checking the accounts table for the description and obtaining the IDAccount value then using that value in the DataGridView filter, but I was hoping there would be a more automated way using bindings.
Any ideas? Thank you for your suggestions.
Edit:
Supposing I have a TextBox control called AccountDescriptionBox, I'd like to be able to do something like
dataGridView1.Filter = string.Format("{0} LIKE '{1}'", "IDAccount", AccountDescriptionBox.Text);
Obviously, this won't work as IDAccount is an integer, not a string. The solution I mention above is
string filter = string.Empty;
Regex searchTerm = new Regex(Regex.Escape(AccountDescriptionBox.Text).Replace('\\', '.'), RegexOptions.IgnoreCase);
var accts = from acct in dataSet1.Accounts
let matches = searchTerm.Matches(acct.Description)
where matches.Count > 0
select acct.ID;
for (int i; i < accts.Count() - 1; i++)
{
filter += string.Format("IDAccount = {0} OR ",accts.ElementAt(i));
}
filter += string.Format("IDAccount = {0}",accts.Last());
dataGridView1.Filter = filter;
This works, but is cumbersome. I'd rather do it through bindings if there's a way.

Check out DataView class. It allows you to sort and filter records and also perform simple SQL-like manipulations.

I don't believe there is a way to do this directly with data bindings. I posted the solution as an edit in response to #CodeBlend's comments.

Is there a way to access the columns in a Dapper FastExpando via string or index?

I am pulling in a Dapper FastExpando object and want to be able to reference the column names dynamically at run time rather than at design/compile time. So I want to be able to do the following:
var testdata = conn.Query("select * from Ride Where RiderNum = 21457");
I want to be able to do the following:
foreach( var row in testdata) {
var Value = row["PropertyA"];
}
I understand that I can do:
var Value = row.PropertyA;
but I can't do that since the name of the property i'm going to need won't be known until runtime.
The answer from this SO Question doesn't work. I still get the same Target Invocation exception. So...
Is there any way to do what I want to do with a Dapper FastExpando?

Sure, it is actually way easier than that:
var sql = "select 1 A, 'two' B";
var row = (IDictionary<string, object>)connection.Query(sql).First();
row["A"].IsEqualTo(1);
row["B"].IsEqualTo("two");

Regarding the portion of the title "or index?" - I needed to access results by index since the column names being returned changed sometimes, so you can use a variation of Sam Saffron's answer like this:
var sql = "select 1, 'two'";
var row = (IDictionary<string, object>)connection.Query(sql).First();
row.Values.ElementAt(0).IsEqualTo(1);
row.Values.ElementAt(1).IsEqualTo("two");

There a simple way to access fields direct below sample
string strConexao = WebConfigurationManager.ConnectionStrings["connection"].ConnectionString;
conexaoBD = new SqlConnection(strConexao);
conexaoBD.Open();
var result = conexaoBD.Query("Select Field1,Field2 from Table").First();
//access field value result.Field1
//access field value result.Field2
if (result.Field1 == "abc"){ dosomething}