I have spent hours trying to figure out why my database cannot find the table I have found numerous examples and none have seemed to help. I have created a separate class to handle the database operations so I can use it on multiple pages.
Here is the code
[Table]
public class MatchItem
{
[Column(IsPrimaryKey = true, CanBeNull=false,IsDbGenerated=true)]
public int MatchID { get; set; }
[Column(CanBeNull = false)]
public string MatchNumber { get; set; }
[Column(CanBeNull = false)]
public string EventName { get; set; }
[Column(CanBeNull = false)]
public DateTime Time { get; set; }
[Column(CanBeNull = false)]
public string[] RedTeams { get; set; }
[Column(CanBeNull = false)]
public string[] BlueTeams { get; set; }
[Column(CanBeNull = false)]
public int RedFinal { get; set; }
[Column(CanBeNull = false)]
public int BlueFinal{ get; set; }
}
Here is the Data context
public class MatchDataContext:DataContext
{
public MatchDataContext(string connectionString) :
base(connectionString)
{
}
public Table<MatchItem> Matches
{
get
{
return this.GetTable<MatchItem>();
}
}
}
I made a class so I could use it on multiple pages
public class MatchDBManager
{
private static string connectionString = #"Data Source=isostore:/DB.sdf";
public MatchDBManager()
{
initialize();
}
public void initialize()
{
using (MatchDataContext Mchdb = new MatchDataContext(connectionString))
{
if (Mchdb.DatabaseExists())
{
Console.WriteLine("DB already exists");
}
else
{
Mchdb.CreateDatabase();
Console.WriteLine("DB created");
}
}
}
public void addMatchData(IList<MatchItem> data)
{
//this.clearData();
//initialize();
using (MatchDataContext Mchdb = new MatchDataContext(connectionString))
{
Mchdb.Matches.InsertAllOnSubmit(data);
Mchdb.SubmitChanges();
}
}
public IList<MatchItem> getTeamData(string teamNum)
{
IList<MatchItem> MatchList = null;
using (MatchDataContext Mchdb = new MatchDataContext(connectionString))
{
IQueryable<MatchItem> mchQuery = from mch in Mchdb.Matches where (mch.RedTeams[0] == teamNum || mch.RedTeams[1] == teamNum || mch.RedTeams[2] == teamNum || mch.BlueTeams[0] == teamNum || mch.BlueTeams[1] == teamNum || mch.BlueTeams[2] == teamNum) select mch;
MatchList = mchQuery.ToList();
}
return MatchList;
}
public IList<MatchItem> getEventData(string eventID)
{
IList<MatchItem> MatchList = null;
using (MatchDataContext Mchdb = new MatchDataContext(connectionString))
{
IQueryable<MatchItem> mchQuery = from mch in Mchdb.Matches where mch.Event == eventID select mch;
MatchList = mchQuery.ToList();
}
return MatchList;
}
private void clearData()
{
using (MatchDataContext Mchdb = new MatchDataContext(connectionString))
{
if (Mchdb.DatabaseExists())
{
Mchdb.DeleteDatabase();
}
}
}
}
I have the error The specified table does not exist[Match].
Added here is where I download
public IList<MatchItem> ParseXML(XmlReader reader)
{
//List<string> save = new List<string>();
List<MatchItem> MatchList= new List<MatchItem>();
XElement matchData;
matchData = XElement.Load(reader);
StringBuilder output = new StringBuilder();
int count = 0;
var matches = from item
in matchData.Elements("match")
select item;
foreach (XElement eachmatch in matches)
{
MatchItem mch = new MatchItem();
string Time = ((eachmatch.Element("pubdate").Value).ToString());
mch.EventName = ((eachmatch.Element("event").Value).ToString());
mch.MatchNumber = ((eachmatch.Element("mch").Value).ToString() + (eachmatch.Element("typ").Value).ToString());
string[] RT = { eachmatch.Element("red1").Value.ToString(), eachmatch.Element("red2").Value.ToString(), eachmatch.Element("red3").Value.ToString() };
string[] BT = { eachmatch.Element("blue1").Value.ToString(), eachmatch.Element("blue2").Value.ToString(), eachmatch.Element("blue3").Value.ToString() };
string RF = ((eachmatch.Element("rfin").Value).ToString());
string BF = ((eachmatch.Element("bfin").Value).ToString());
// Time = Time.Substring(0, (Time.IndexOf("+") - 1));
mch.Time = DateTime.Parse(Time);
mch.RedTeams = RT;
mch.BlueTeams = BT;
mch.RedFinal = int.Parse(RF);
mch.BlueFinal= int.Parse(BF);
mch.MatchID = count;
count += 1;
MatchList.Add(mch);
}
return MatchList;
}
This is where I call this method
void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
initializeDB();
if (e.Error == null)
{
XmlReader reader = XmlReader.Create(new StringReader(e.Result));
DownloadInfo di = new DownloadInfo();
IList <MatchItem>data= di.ParseXML(reader);
outputer(data);
addData(data.ToList<MatchItem>());
}
else
{
IList<MatchItem> data = getTeamData(strMyTeam);
outputer(data);
}
}
I ended up removing the DatabaseManager class and putting the functions in the main code
Then I output them to the screen here
public void outputer(IList<MatchItem> mch)
{
for (int i = 0; i < mch.Count; i++)
{
Score sc = new Score();
sc.Width = lsbData.Width;
sc.Height = sc.Height;
sc.Time = mch[i].Time.ToString();
sc.Event = mch[i].EventName;
sc.RT = mch[i].RedTeams[0] + " " + mch[i].RedTeams[1] + " " + mch[i].RedTeams[2];
sc.BT = mch[i].BlueTeams[0] + " " + mch[i].BlueTeams[1] + " " + mch[i].BlueTeams[2];
sc.RF = mch[i].RedFinal.ToString();
sc.BF = mch[i].BlueFinal.ToString();
lsbData.Items.Add(sc);
}
}
*note:score is a custom control that works(and worked) before the database code *
I don't see where you actually create a Match Object.
if you have you need to include that code in the question as well. and if you haven't, that would explain why it doesn't exist.
Addition
in order to add Match Objects to a list you will have to create the objects first then add them to the list, I don't think you can create the whole list of objects before creating each individual object.
more Additional Information
the object still needs to be created before you can add items to it. that is what the error is telling you. you don't have the object to insert data into.
Match Table1 = new Match();
this creates a new Match object which allows you to access the pieces of the object and insert data into the object like this
Table1.MatchNumber = 42
you can't add to something to a memory location until you set aside that memory location for that specific person and give it a name.
when you create that class you can add functions and all sorts of fun stuff to it, but you can't use any of it until you have created a Match Object.
you can't add something to a list that doesn't exist, you have to create the Match Object first, then add it to the list
Related
I am new to C# and OOP, in general, I've kinda hit a wall I am reading in this CSV using the CSV Helper package, but there are some unwanted rows, etc so I have cleaned it up by iterating over "records" and creating a new class LineItems.
But Now I appear to be a bit stuck. I know void doesn't return anything and is a bit of a placeholder. But How can I access all the instances of LineItems outside of this function?
public void getMapper()
{
using (var StreamReader = new StreamReader(#"D:\Data\Projects\dictUnitMapper.csv"))
{
using (var CsvReader = new CsvReader(StreamReader, CultureInfo.InvariantCulture))
{
var records = CsvReader.GetRecords<varMapper>().ToList();
foreach (var item in records)
{
if (item.name != "#N/A" && item.priority != 0)
{
LineItems lineItem = new LineItems();
lineItem.variableName = item.Items;
lineItem.variableUnit = item.Unit;
lineItem.variableGrowthCheck = item.growth;
lineItem.variableAVGCheck = item.avg;
lineItem.variableSVCheck = item.svData;
lineItem.longName = item.name;
lineItem.priority = item.priority;
}
}
}
}
}
public class LineItems
{
public string variableName;
public string variableUnit;
public bool variableGrowthCheck;
public bool variableAVGCheck;
public bool variableSVCheck;
public string longName;
public int priority;
}
public class varMapper
{
public string Items { get; set; }
public string Unit { get; set; }
public bool growth { get; set; }
public bool avg { get; set; }
public bool svData { get; set; }
public string name { get; set; }
public int priority { get; set; }
}
You should write your method to return a list.
public List<LineItems> GetMapper()
{
using (var StreamReader = new StreamReader(#"D:\Data\Projects\dictUnitMapper.csv"))
{
using (var CsvReader = new CsvHelper.CsvReader(StreamReader, CultureInfo.InvariantCulture))
{
return
CsvReader
.GetRecords<varMapper>()
.Where(item => item.name != "#N/A")
.Where(item => item.priority != 0)
.Select(item => new LineItems()
{
variableName = item.Items,
variableUnit = item.Unit,
variableGrowthCheck = item.growth,
variableAVGCheck = item.avg,
variableSVCheck = item.svData,
longName = item.name,
priority = item.priority,
})
.ToList();
}
}
}
Here's an alternative syntax for building the return value:
return
(
from item in CsvReader.GetRecords<varMapper>()
where item.name != "#N/A"
where item.priority != 0
select new LineItems()
{
variableName = item.Items,
variableUnit = item.Unit,
variableGrowthCheck = item.growth,
variableAVGCheck = item.avg,
variableSVCheck = item.svData,
longName = item.name,
priority = item.priority,
}
).ToList();
I have a C# project and looking for simple solution for map one class object data to list of another class object.
This is my input class
public class RatesInput
{
public string Type1 { get; set; }
public string Break1 { get; set; }
public string Basic1 { get; set; }
public string Rate1 { get; set; }
public string Type2 { get; set; }
public string Break2 { get; set; }
public string Basic2 { get; set; }
public string Rate2 { get; set; }
public string Type3 { get; set; }
public string Break3 { get; set; }
public string Basic3 { get; set; }
public string Rate3 { get; set; }
}
This is my another class structure
public class RateDetail
{
public string RateType { get; set; }
public decimal Break { get; set; }
public decimal Basic { get; set; }
public decimal Rate { get; set; }
}
it has a object like below. (For easiering the understanding, I use hardcoded values and actually values assign from a csv file)
RatesInput objInput = new RatesInput();
objInput.Type1 = "T";
objInput.Break1 = 100;
objInput.Basic1 = 50;
objInput.Rate1 = 0.08;
objInput.Type2 = "T";
objInput.Break2 = 200;
objInput.Basic2 = 50;
objInput.Rate2 = 0.07;
objInput.Type3 = "T";
objInput.Break3 = 500;
objInput.Basic3 = 50;
objInput.Rate3 = 0.06;
Then I need to assign values to "RateDetail" list object like below.
List<RateDetail> lstDetails = new List<RateDetail>();
//START Looping using foreach or any looping mechanism
RateDetail obj = new RateDetail();
obj.RateType = //first iteration this should be assigned objInput.Type1, 2nd iteration objInput.Type2 etc....
obj.Break = //first iteration this should be assigned objInput.Break1 , 2nd iteration objInput.Break2 etc....
obj.Basic = //first iteration this should be assigned objInput.Basic1 , 2nd iteration objInput.Basic2 etc....
obj.Rate = //first iteration this should be assigned objInput.Rate1, 2nd iteration objInput.Rate2 etc....
lstDetails.Add(obj); //Add obj to the list
//END looping
Is there any way to convert "RatesInput" class data to "RateDetail" class like above method in C#? If yes, how to iterate data set?
Try this:
public class RatesList : IEnumerable<RateDetail>
{
public RatesList(IEnumerable<RatesInput> ratesInputList)
{
RatesInputList = ratesInputList;
}
private readonly IEnumerable<RatesInput> RatesInputList;
public IEnumerator<RateDetail> GetEnumerator()
{
foreach (var ratesInput in RatesInputList)
{
yield return new RateDetail
{
RateType = ratesInput.Type1,
Break = Convert.ToDecimal(ratesInput.Break1, new CultureInfo("en-US")),
Basic = Convert.ToDecimal(ratesInput.Basic1, new CultureInfo("en-US")),
Rate = Convert.ToDecimal(ratesInput.Rate1, new CultureInfo("en-US"))
};
yield return new RateDetail
{
RateType = ratesInput.Type2,
Break = Convert.ToDecimal(ratesInput.Break2),
Basic = Convert.ToDecimal(ratesInput.Basic2),
Rate = Convert.ToDecimal(ratesInput.Rate2, new CultureInfo("en-US"))
};
yield return new RateDetail
{
RateType = ratesInput.Type3,
Break = Convert.ToDecimal(ratesInput.Break3),
Basic = Convert.ToDecimal(ratesInput.Basic3),
Rate = Convert.ToDecimal(ratesInput.Rate3, new CultureInfo("en-US"))
};
}
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
}
And use:
var list = new RatesList(new List<RatesInput>() { objInput });
foreach (var item in list)
{
Console.WriteLine(item.Basic);
}
You can use Reflection to get the properties info like this:
var props = objInput.GetType().GetProperties();
var types = props.Where(x => x.Name.StartsWith("Type"))
.Select(x => x.GetValue(objInput)).ToList();
var breaks = props.Where(x => x.Name.StartsWith("Break"))
.Select(x => x.GetValue(objInput)).ToList();
var basics = props.Where(x => x.Name.StartsWith("Basic"))
.Select(x => x.GetValue(objInput)).ToList();
var rates = props.Where(x => x.Name.StartsWith("Rate"))
.Select(x => x.GetValue(objInput)).ToList();
List<RateDetail> lstDetails = new List<RateDetail>();
for (int i = 0; i < types.Count; i++)
{
lstDetails.Add(new RateDetail
{
RateType = types[i].ToString(),
Break = Convert.ToDecimal(breaks[i]),
Basic = Convert.ToDecimal(basics[i]),
Rate = Convert.ToDecimal(rates[i])
});
}
I've been trying to implement Lucene to make the searching on my website faster.
My code currently works, however, I think I am not correctly making use of Lucene. Right now, my search query is productName:asterisk(input)asterisk - I can't imagine this is what you're supposed to do to find all products where productName contains input. I think it has something to do with the way I save the fields to a document.
My code:
LuceneHelper.cs
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data.Entity.Migrations.Model;
using System.Linq;
using System.Threading.Tasks;
using Lucene.Net;
using Lucene.Net.Analysis;
using Lucene.Net.Analysis.Standard;
using Lucene.Net.Documents;
using Lucene.Net.Index;
using Lucene.Net.QueryParsers;
using Lucene.Net.Search;
using Lucene.Net.Store;
using Rentpro.Models;
using RentPro.Models.Tables;
using RentProModels.Models;
namespace RentPro.Helpers
{
public class LuceneHelper
{
private const Lucene.Net.Util.Version Version = Lucene.Net.Util.Version.LUCENE_30;
private bool IndicesInitialized;
private List<Language> Languages = new List<Language>();
public void BuildIndices(DB db)
{
Languages = GetLanguages(db);
Analyzer analyzer = new StandardAnalyzer(Version);
List<Product> allProducts = db.GetAllProducts(true, false);
foreach (Language l in Languages)
{
BuildIndicesForLanguage(allProducts, analyzer, l.ID);
}
IndicesInitialized = true;
}
private void BuildIndicesForLanguage(List<Product> products, Analyzer analyzer, int id = 0)
{
using (
IndexWriter indexWriter = new IndexWriter(GetDirectory(id), analyzer,
IndexWriter.MaxFieldLength.UNLIMITED))
{
var x = products.Count;
foreach (Product p in products)
{
SearchProduct product = SearchProduct.FromProduct(p, id);
Document document = new Document();
Field productIdField = new Field("productId", product.ID.ToString(), Field.Store.YES, Field.Index.NO);
Field productTitleField = new Field("productName", product.Name, Field.Store.YES, Field.Index.ANALYZED);
Field productDescriptionField = new Field("productDescription", product.Description, Field.Store.YES, Field.Index.ANALYZED);
Field productCategoryField = new Field("productCategory", product.Category, Field.Store.YES, Field.Index.ANALYZED);
Field productCategorySynonymField = new Field("productCategorySynonym", product.CategorySynonym, Field.Store.YES, Field.Index.ANALYZED);
Field productImageUrlField = new Field("productImageUrl", product.ImageUrl, Field.Store.YES, Field.Index.NO);
Field productTypeField = new Field("productType", product.Type, Field.Store.YES, Field.Index.NO);
Field productDescriptionShortField = new Field("productDescriptionShort", product.DescriptionShort, Field.Store.YES, Field.Index.NO);
Field productPriceField = new Field("productPrice", product.Price, Field.Store.YES, Field.Index.NO);
document.Add(productIdField);
document.Add(productTitleField);
document.Add(productDescriptionField);
document.Add(productCategoryField);
document.Add(productCategorySynonymField);
document.Add(productImageUrlField);
document.Add(productTypeField);
document.Add(productDescriptionShortField);
document.Add(productPriceField);
indexWriter.AddDocument(document);
}
indexWriter.Optimize();
indexWriter.Commit();
}
}
public List<SearchProduct> Search(string input)
{
if (!IndicesInitialized)
{
BuildIndices(new DB());
return Search(input);
}
IndexReader reader = IndexReader.Open(GetCurrentDirectory(), true);
Searcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new StandardAnalyzer(Version);
TopScoreDocCollector collector = TopScoreDocCollector.Create(100, true);
MultiFieldQueryParser parser = new MultiFieldQueryParser(Version,
new[] { "productDescription", "productCategory", "productCategorySynonym", "productName" }, analyzer)
{
AllowLeadingWildcard = true
};
searcher.Search(parser.Parse("*" + input + "*"), collector);
ScoreDoc[] hits = collector.TopDocs().ScoreDocs;
List<int> productIds = new List<int>();
List<SearchProduct> results = new List<SearchProduct>();
foreach (ScoreDoc scoreDoc in hits)
{
Document document = searcher.Doc(scoreDoc.Doc);
int productId = int.Parse(document.Get("productId"));
if (!productIds.Contains(productId))
{
productIds.Add(productId);
SearchProduct result = new SearchProduct
{
ID = productId,
Description = document.Get("productDescription"),
Name = document.Get("productName"),
Category = document.Get("productCategory"),
CategorySynonym = document.Get("productCategorySynonym"),
ImageUrl = document.Get("productImageUrl"),
Type = document.Get("productType"),
DescriptionShort = document.Get("productDescriptionShort"),
Price = document.Get("productPrice")
};
results.Add(result);
}
}
reader.Dispose();
searcher.Dispose();
analyzer.Dispose();
return results;
}
private string GetDirectoryPath(int languageId = 1)
{
return GetDirectoryPath(Languages.SingleOrDefault(x => x.ID == languageId).UriPart);
}
private string GetDirectoryPath(string languageUri)
{
return AppDomain.CurrentDomain.BaseDirectory + #"\App_Data\LuceneIndices\" + languageUri;
}
private List<Language> GetLanguages(DB db)
{
return db.Languages.ToList();
}
private int GetCurrentLanguageId()
{
return Translator.GetCurrentLanguageID();
}
private FSDirectory GetCurrentDirectory()
{
return FSDirectory.Open(GetDirectoryPath(GetCurrentLanguageId()));
}
private FSDirectory GetDirectory(int languageId)
{
return FSDirectory.Open(GetDirectoryPath(languageId));
}
}
public class SearchProduct
{
public int ID { get; set; }
public string Description { get; set; }
public string Name { get; set; }
public string ImageUrl { get; set; }
public string Type { get; set; }
public string DescriptionShort { get; set; }
public string Price { get; set; }
public string Category { get; set; }
public string CategorySynonym { get; set; }
public static SearchProduct FromProduct(Product p, int languageId)
{
return new SearchProduct()
{
ID = p.ID,
Description = p.GetText(languageId, ProductLanguageType.Description),
Name = p.GetText(languageId),
ImageUrl =
p.Images.Count > 0
? "/Company/" + Settings.Get("FolderName") + "/Pictures/Products/100x100/" +
p.Images.Single(x => x.Type == "Main").Url
: "",
Type = p is HuurProduct ? "HuurProduct" : "KoopProduct",
DescriptionShort = p.GetText(languageId, ProductLanguageType.DescriptionShort),
Price = p is HuurProduct ? ((HuurProduct)p).CalculatedPrice(1, !Settings.GetBool("BTWExLeading")).ToString("0.00") : "",
Category = p.Category.Name,
CategorySynonym = p.Category.Synonym
};
}
}
}
How I call the LuceneHelper:
public ActionResult Lucene(string SearchString, string SearchOrderBy, int? page, int? amount)
{
List<SearchProduct> searchResults = new List<SearchProduct>();
if (!SearchString.IsNullOrWhiteSpace())
{
LuceneHelper lucene = new LuceneHelper();
searchResults = lucene.Search(SearchString);
}
return View(new LuceneSearchResultsVM(db, SearchString, searchResults, SearchOrderBy, page ?? 1, amount ?? 10));
}
LuceneSearchResultsVM:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Dynamic;
using System.Web;
using RentPro.Models.Tables;
using System.Linq.Expressions;
using System.Reflection;
using Microsoft.Ajax.Utilities;
using Rentpro.Models;
using RentPro.Helpers;
using RentProModels.Models;
namespace RentPro.ViewModels
{
public class LuceneSearchResultsVM
{
public List<SearchProduct> SearchProducts { get; set; }
public bool BTWActive { get; set; }
public bool BTWEXInput { get; set; }
public bool BTWShow { get; set; }
public bool BTWExLeading { get; set; }
public string FolderName { get; set; }
public string CurrentSearchString { get; set; }
public string SearchOrderBy { get; set; }
public int Page;
public int Amount;
public String SearchQueryString {
get
{
return Translator.Translate("Zoekresultaten voor") + ": " + CurrentSearchString + " (" +
SearchProducts.Count + " " + Translator.Translate("resultaten") + " - " +
Translator.Translate("pagina") + " " + Page + " " + Translator.Translate("van") + " " +
CalculateAmountOfPages() + ")";
}
set { }
}
public LuceneSearchResultsVM(DB db, string queryString, List<SearchProduct> results, string searchOrderBy, int page, int amt)
{
BTWActive = Settings.GetBool("BTWActive");
BTWEXInput = Settings.GetBool("BTWEXInput");
BTWShow = Settings.GetBool("BTWShow");
BTWExLeading = Settings.GetBool("BTWExLeading");
FolderName = Settings.Get("FolderName");
SearchProducts = results;
CurrentSearchString = queryString;
if (searchOrderBy.IsNullOrWhiteSpace())
{
searchOrderBy = "Name";
}
SearchOrderBy = searchOrderBy;
Amount = amt == 0 ? 10 : amt;
int maxPages = CalculateAmountOfPages();
Page = page > maxPages ? maxPages : page;
SearchLog.MakeEntry(queryString, SearchProducts.Count(), db, HttpContext.Current.Request.UserHostAddress);
}
public List<SearchProduct> GetOrderedList()
{
List<SearchProduct> copySearchProductList = new List<SearchProduct>(SearchProducts);
copySearchProductList = copySearchProductList.Skip((Page - 1) * Amount).Take(Amount).ToList();
switch (SearchOrderBy)
{
case "Price":
copySearchProductList.Sort(new PriceSorter());
break;
case "DateCreated":
return copySearchProductList; //TODO
default:
return copySearchProductList.OrderBy(n => n.Name).ToList();
}
return copySearchProductList;
}
public int CalculateAmountOfPages()
{
int items = SearchProducts.Count;
return items / Amount + (items % Amount > 0 ? 1 : 0);
}
}
public class PriceSorter : IComparer<SearchProduct>
{
public int Compare(SearchProduct x, SearchProduct y)
{
if (x == null || x.Price == "") return 1;
if (y == null || y.Price == "") return -1;
decimal priceX = decimal.Parse(x.Price);
decimal priceY = decimal.Parse(y.Price);
return priceX > priceY ? 1 : priceX == priceY ? 0 : -1;
}
}
}
Any help would be greatly appreciated.
Example input list of products:
Query:
SELECT Product.ID, Product.Decription, Product.Name FROM Product
Desired results:
SQL Server query equivalent:
SELECT Product.ID, Product.Decription, Product.Name FROM Product WHERE Product.Name LIKE '%Zelf%' OR Product.Decription LIKE '%Zelf%'
Basically, Zelf is the input. I want to find all matches with product descriptions or product names that contain the input string.
ucene not allows to use ? or * as starting symbols of the searching term. To overcome this issue you need to store in your index a sub-strings from any position of word to it end position. E.g. for word test you should put to index
test
est
st
t
I recommend to use separate field for that. Java example for case if you have a short field with one word like a product name.
for(int i = 0; i < product.SafeName.length()-1; i++){
Field productTitleSearchField = new Field("productNameSearch", product.SafeName.substring(i, product.SafeName.length()), Field.Store.NO, Field.Index.ANALYZED);
}
After this you can use following query string
productNameSearch:(input)asterisk or use a PrefixQuery for searching product names containing input.
In case if you have several words in you field and for you will be enough to have some reasonable length of your input, then it will better to add for this field a NGramTokenFilter. You if have limit on your input string from n to m you should create a NGram Token Filter with n minGram and m maxGramm. If you has word test and you limit 2 to 3 you will have in your index words
te
tes
es
est
st
After this you can search via string
ngrammField:(input)
This doesn't answer your question but it is safer to use the using block in C#. In your current code, calling dispose can throw.
You're doing:
IndexReader reader = IndexReader.Open(GetCurrentDirectory(), true);
Searcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new StandardAnalyzer(Version);
//...
reader.Dispose();
searcher.Dispose();
analyzer.Dispose();
Which can be replaced with:
using (IndexReader reader = IndexReader.Open(GetCurrentDirectory(), true))
using (Searcher searcher = new IndexSearcher(reader))
using (Analyzer analyzer = new StandardAnalyzer(Version))
{
//Do whatever else here.. No need to call "dispose".
}
The above is pretty much a try -> finally statement where it tries to do whatever is in the using statement. If anything throws, the finally block disposes the resources opened/allocated.
Another way (comma operator.. if all variables are of the same type) is:
using (whatever foo = new whatever(), whatever bar = new whatever(), ...)
{
//do whatever here..
}
I'm currently working on parsing a csv file that was exported by another application. This application exported the data in a strange way. This export is from accoutning and it looks similar to this..
I'm trying to figure out a way to read the csv file, then split up the multiple 'All Accounts' values and 'Amt' Values so that M200 and 300.89 is another entry, M300 and 400.54 are another entry, and M400 and 100.00 are another entry. So after inserting this single row into the database, I should actually have 4 rows like so..
This is how I'm currently reading and inserting into the database.
List<RawData> data = new List<RawData>();
try
{
string text = File.ReadAllText(lblFileName.Text);
string[] lines = text.Split('\n');
int total = 0, reduced = 0;
foreach (string line in lines)
{
RawData temp = new RawData(line);
total++;
if (!(temp.FirstAccount.Length == 0 || temp.FirstAccount == "1ST-ACCT-NO"))
{
reduced++;
data.Add(temp);
}
}
}
catch (IOException ex)
{
Console.WriteLine("Unable to read file. " + ex.ToString());
MessageBox.Show(ex.ToString());
}
try
{
foreach (RawData rData in data)
{
tCarsInTransit cit = new tCarsInTransit
{
FIRST_ACCT_NO = rData.FirstAccount,
ACCOUNT_NO_DV = rData.AccountNoDv,
ACCT_NO = rData.AcctNo,
ACCT_NO_L = rData.AccNoL,
ACCT_NUM_DV = rData.AcctNumDv,
ACCT_PFX = rData.AcctPfx,
ACCT_PFX_PRT = rData.AcctPfxPrt,
ACCT_TYPE_DV = rData.AcctTypeDv,
ADV_NO = rData.AdvNo,
ALL_PRT_FLAG = rData.AllPrtFlag,
AMT = rData.Amt,
AMT_GLE = rData.AmtGle,
BASE_GLE = rData.BaseGle,
CNT_CAT = rData.CntCat,
COLD_PRT_FLAG = rData.ColdPrtFlag,
COST_DV = rData.CostDv,
COST_OVRD_FLAG_DV = rData.CostOvrdFlagDv,
CR_ACCT_DV = rData.CrAcctDv,
CR_ACCT_DV_GLE = rData.CrAcctDvGle,
CROSS_POSTING_FLAG = rData.CrossPostingFlag,
CROSS_POST_CAT = rData.CrossPostCat,
CTRL_NO = rData.CtrlNo,
CTRL_TYPE_DV = rData.CtrlTypeDv,
DESC_REQD_DV = rData.DescReqdDv,
DR_ACCT_DV = rData.DrAcctDv,
GL_DIST_ACCT_DV = rData.GLDistAcctDv,
GL_DIST_DV = rData.GLDistDv,
GRP_NO_DV = rData.GrpNoDv,
ID_PORT_DATE_TIME_FMT_CAT = rData.IdPortDateTimeFmtCat,
INACTIVITY_DV = rData.InactivityDv,
JOIN_COL = rData.JoinCol,
JRNL_DATE = rData.JrnlDate,
JRNL_PFX = rData.JrnlPfx
};
tCIT.tCarsInTransits.Add(cit);
tCIT.SaveChanges();
lblMessage.ForeColor = System.Drawing.Color.Green;
lblMessage.Text = "Finished uploading. ";
}
}
catch (DbEntityValidationException ex)
{
foreach (var eve in ex.EntityValidationErrors)
{
Console.WriteLine("Entity of type \"{0}\" in state \"{1}\" has the following validation errors:",
eve.Entry.Entity.GetType().Name, eve.Entry.State);
foreach (var ve in eve.ValidationErrors)
{
Console.WriteLine("- Property: \"{0}\", Error: \"{1}\"",
ve.PropertyName, ve.ErrorMessage);
}
}
throw;
}
I am not sure how to accomplish this. The above currently inserts the csv file into Sql Server the exact way the csv file was exported. Any ideas would greatly be appreciated! Thanks!
EDIT: Here is the RawData class.
class RawData
{
public string FirstAccount { get; set; }
public string AccountNoDv { get; set; }
public string AcctNo { get; set; }
public string AccNoL { get; set; }
public string AcctNumDv { get; set; }
public string AcctPfx { get; set; }
public string AcctPfxPrt { get; set; }
public string AcctTypeDv { get; set; }
public string AdvNo { get; set; }
public string AllPrtFlag { get; set; }
public string Amt { get; set; }
public string AmtGle { get; set; }
public string BaseGle { get; set; }
public string CntCat { get; set; }
public string ColdPrtFlag { get; set; }
public string CostDv { get; set; }
public string CostOvrdFlagDv { get; set; }
public string CrAcctDv { get; set; }
public string CrAcctDvGle { get; set; }
public string CrossPostingFlag { get; set; }
public string CrossPostCat { get; set; }
public string CtrlNo { get; set; }
public string CtrlTypeDv { get; set; }
public string DescReqdDv { get; set; }
public string DrAcctDv { get; set; }
public string GLDistAcctDv { get; set; }
public string GLDistDv { get; set; }
public string GrpNoDv { get; set; }
public string IdPortDateTimeFmtCat { get; set; }
public string InactivityDv { get; set; }
public string JoinCol { get; set; }
public string JrnlDate { get; set; }
public string JrnlPfx { get; set; }
public RawData(string csvString)
{
string[] citData = csvString.Replace(", ", "").Replace(".,", ".").Split(',');
try
{
FirstAccount = citData[0];
AccountNoDv = citData[1];
AcctNo = citData[2];
AccNoL = citData[3];
AcctNumDv = citData[4];
AcctPfx = citData[5];
AcctPfxPrt = citData[6];
AcctTypeDv = citData[7];
AdvNo = citData[8];
AllPrtFlag = citData[9];
Amt = citData[10];
AmtGle = citData[11];
BaseGle = citData[12];
CntCat = citData[13];
ColdPrtFlag = citData[14];
CostDv = citData[15];
CostOvrdFlagDv = citData[16];
CrAcctDv = citData[17];
CrAcctDvGle = citData[18];
CrossPostingFlag = citData[19];
CrossPostCat = citData[20];
CtrlNo = citData[21];
CtrlTypeDv = citData[22];
DescReqdDv = citData[23];
DrAcctDv = citData[24];
GLDistAcctDv = citData[25];
GLDistDv = citData[26];
GrpNoDv = citData[27];
IdPortDateTimeFmtCat = citData[28];
InactivityDv = citData[29];
JoinCol = citData[30];
JrnlDate = citData[31];
JrnlPfx = citData[32];
}
catch (Exception ex)
{
Console.WriteLine("Something went wrong. " + ex.ToString());
}
}
}
EDIT 2: AllAccounts in the images is acutally 'AccountNoDv' and there are actually many different fields that have multiples like 'AccountNoDv'(AllAccounts) but we might be removing those as this is not a final export. As of right now the two fields I'm worried most about are AccountNoDv and Amt.
Try something like this:
foreach (string line in lines)
{
RawData temp = new RawData(line);
var AllAccounts = temp.AccountNoDv.split(' ');
var Amts = temp.Amt.split(' ');
if (AllAccounts.Length() == Amts.Length() && Amts.Length() > 1) {
// We have multiple values!
reduced++;
for (int i = 0; i < AllAccounts.Length(); i++) {
RawData temp2 = RawDataCopy(temp); // Copy the RawData object
temp2.AccountNoDv = AllAccounts[i];
temp2.Amt = Amts[i];
total++;
data.Add(temp2);
}
}
else {
total++;
if (!(temp.FirstAccount.Length == 0 || temp.FirstAccount == "1ST-ACCT-NO"))
{
reduced++;
data.Add(temp);
}
}
}
And:
private RawData RawDataCopy(RawData copyfrom) {
// Write a function here that returns an exact copy from the one provided
// You might have to create a parameterless constructor for RawData
RawData RawDataCopy = new RawData();
RawDataCopy.FirstAccount = copyfrom.FirstAccount;
RawDataCopy.AccountNoDv = copyfrom.AccountNoDv;
RawDataCopy.AcctNo = copyfrom.AcctNo;
// . . . . . . . .
RawDataCopy.JrnlPfx = copyfrom.JrnlPfx;
return RawDataCopy;
}
Then also add a parameterless constructor to your RawData class:
public RawData()
{
}
Perhaps it would be sexier to implement the ICloneable interface and call the Clone() function instead of the RawDataCopy function, but it gets the idea across.
In Linq you can use SelectMany to increase the number of elements in a list. Here is a rough example of how this could be done. I make the assumption that the number of sub elements in AllAccounts and Amt is the same. A more robust solution would check for these issues.
So after you have loaded your data list:
var expandedData =
data.SelectMany(item =>
// split amount (will just return one item if no spaces)
item.Amt.Split(" ".ToCharArray())
// join this to the split of all accounts
.Zip(item.AllAccounts.Split(" ".ToCharArray()),
// return the joined item as a new anon object
(a,b) => new { amt=a, all=b }),
// take the original list item and the anon object and return our new item
(full,pair) => { full.Amt = pair.amt; full.AllAccounts = pair.all; return full; }));
You will now have a list of your data items with the multiple items expanded into the list.
I don't have test data to test so I might have some minor typos -- but I put in lots of comments to make the Linq as clear as possible.
Here is is simple example I wrote in LinqPad for myself to make sure I understood how SelectMany worked:
string [] list = { "a b c d","e","f g" };
var result = list.SelectMany((e) =>
e.Split(" ".ToCharArray()),
(o,item) => new { org = o, item = item}).Dump();
I have a list of dates (currently there are 4000 in the selected result)
I am trying to put the results in a chart,
The Class looks like this
public class DisplayObjectDates
{
public int Month { get; set; }
public int Year { get; set; }
public int day { get; set; }
public DateTime fulldatetime { get; set; }
public int CountedDate { get; set; }
}
I have a list of the class
private static List<DisplayObjectDates> SortedDatesDays = new List<DisplayObjectDates>();
and I add to the list like this after calling from EF and getting a returned list
if (SortedDatesDays.Count() == 0)
{
var addDisplayObjectDatesYear = new DisplayObjectDates();
addDisplayObjectDatesYear.Year = contextreturned.change_time.Year;
addDisplayObjectDatesYear.Month = contextreturned.change_time.Month;
addDisplayObjectDatesYear.day = contextreturned.change_time.Day;
addDisplayObjectDatesYear.fulldatetime = contextreturned.change_time;
addDisplayObjectDatesYear.CountedDate = 1;
SortedDatesDays.Add(addDisplayObjectDatesYear);
}
else
{
foreach (var VARIABLE in SortedDatesDays)
{
if (VARIABLE.day == contextreturned.change_time.Day && VARIABLE.Month == contextreturned.change_time.Month && VARIABLE.Year == contextreturned.change_time.Year)
{
VARIABLE.CountedDate = VARIABLE.CountedDate++;
}
else
{
var addDisplayObjectDatesYear = new DisplayObjectDates();
addDisplayObjectDatesYear.Year = contextreturned.change_time.Year;
addDisplayObjectDatesYear.Month = contextreturned.change_time.Month;
addDisplayObjectDatesYear.day = contextreturned.change_time.Day;
addDisplayObjectDatesYear.fulldatetime = contextreturned.change_time;
addDisplayObjectDatesYear.CountedDate = 1;
SortedDatesDays.Add(addDisplayObjectDatesYear);
}
}
}
This gives me an error
Collection was modified; enumeration operation may not execute.
so I change the
foreach (var VARIABLE in SortedDatesDays)
to
foreach (var VARIABLE in SortedDatesDays.ToList())
and now i get out of memory exeption
At the end of the day I need to count how many times an event happened on a certain date
I need to put this into a form that i can then use in a chart (DEVEXPRESS)
I am not sure if i should use linq or the current system.
All out of ideas any help with the corrent way in doing this would be greatly appreciated
thanks
a0011010011
I actually thought that foreach (var VARIABLE in SortedDatesDays.ToArray()) will solve the problem as I use it often.
In that case, try the following.
...
else
{
// create a temporary collection for storing new items
var list = new List<DisplayObjectDates>();
foreach (var VARIABLE in SortedDatesDays)
{
if (...) { ... }
else
{
var addDisplayObjectDatesYear = new DisplayObjectDates();
...
// place it to the new list instead
list.Add(addDisplayObjectDatesYear);
}
}
// merge lists
SortedDatesDays.AddRange(list);
}
While you are assigning FullDateTime DisplayObjectDates object ... I prefer to say you to reconstruct your class it may be something like this ... it also help your program to use less memery ..
public class DisplayObjectDates
{
public int Month { get { return fulldatetime.Month; } }
public int Year { get { return fulldatetime.Year; } }
public int day { get { return fulldatetime.Day; } }
public DateTime fulldatetime { get; set; }
public int CountedDate { get; set; }
}
Then sort your initializing function
if (SortedDatesDays.Count() == 0)
{
var addDisplayObjectDatesYear = new DisplayObjectDates();
addDisplayObjectDatesYear.fulldatetime = contextreturned.change_time;
addDisplayObjectDatesYear.CountedDate = 1;
SortedDatesDays.Add(addDisplayObjectDatesYear);
}
else
{
foreach (var VARIABLE in SortedDatesDays)
{
if (VARIABLE.fulldatetime.Date == contextreturned.change_time.fulldatetime.Date)
{
VARIABLE.CountedDate = VARIABLE.CountedDate++;
}
else
{
var addDisplayObjectDatesYear = new DisplayObjectDates();
addDisplayObjectDatesYear.fulldatetime = contextreturned.change_time;
addDisplayObjectDatesYear.CountedDate = 1;
SortedDatesDays.Add(addDisplayObjectDatesYear);
}
}
}