I am trying to decipher the correct syntax for using JObject Parse when I need to have one of the values set by a variable. This is for using Algolia to push a new object to my search index.
songIndexHelper.PartialUpdateObject(JObject.Parse(#"{""ApprovalFL"":"true",
""objectID"":"'+Accepted.Value+'"}"));
I receive Accepted.Value from my function argument. For example, Accepted.Value could equal something like 98. Also, true should be formatted as boolean instead of a string. The above is my attempt. How should I fix my syntax?
I'm following this documentation from Algolia: https://www.algolia.com/doc/api-reference/api-methods/partial-update-objects/
For more context, here is the above line in the function:
public ActionResult Index(int? Accepted, int? Denied)
{
var accountInfo = EntityDataAccess.GetAccountInfoByUserID(User.Identity.GetUserId());
if(accountInfo == null || accountInfo.AdminFL == false || accountInfo.LabelFL == true)
{
return RedirectToAction("Index", "Home");
}
else
{
if(Accepted != null)
{
EntityDataAccess.AcceptSong(Accepted.Value);
var songIndexHelper = HttpContext.Application.Get("SongIndexHelper") as IndexHelper<SongAlgoliaModel>;
songIndexHelper.PartialUpdateObject(JObject.Parse(#"{""ApprovalFL"":""true"",
""objectID"":""Accepted.Value""}"));
}
This should produce what you are looking for:
String json = "{\"ApprovalFL\":true,\"objectID\":" + Accepted.Value.ToString() + "}";
which is:
{"ApprovalFL":true,"objectID":98}
songIndexHelper.PartialUpdateObject(JObject.Parse(#"{""ApprovalFL"":""true"",
""objectID"":""Accepted.Value""}"));
should be:
songIndexHelper.PartialUpdateObject(JObject.Parse(#"{""ApprovalFL"":true,
""objectID"":" +Accepted.Value+ "}"));
The key is to use + to concatenate in the value of Accepted, and not wrap true in quotes.
Another approach I would suggest is not using strings at all. Consider an approach like:
var bob = new { ApprovalFL = true, objectID = Accepted.Value};
var obj = JObject.FromObject(bob);
songIndexHelper.PartialUpdateObject(obj);
Below is my code which gives an error:
Cannot implicitly convert type 'System.Collections.Generic.List' to 'string[]'
I tried several times to solve the error. But I failed to do so.
if any body can suggest what could be the solution.. Thanks :)
public GetContentResponse GetContent(abcServiceClient client, QueryPresentationElementIDsResponse querypresentationelementresponse)
{
GetContentRequest GetContentRequest = new GetContentRequest();
GetContentResponse contentresponse = new GetContentResponse();
querypresentationelementresponse = presentationElementId(client);
List<string[]> chunks = new List<string[]>();
for (int i = 0; i < querypresentationelementresponse.IDs.Length; i += 25)
{
chunks.Add(querypresentationelementresponse.IDs.Skip(i).Take(25).ToArray());
contentresponse = client.GetContent(new GetContentRequest()
{
IDs = chunks // here i get this error
});
}
return contentresponse;
}
You're trying to assign a List to a string array. Convert the list to an array.
Since you haven't specified exactly where the error was I suppose it's when you're assign the IDs variable.
The following code would solve it:
public GetContentResponse GetContent(abcServiceClient client, QueryPresentationElementIDsResponse querypresentationelementresponse)
{
GetContentRequest GetContentRequest = new GetContentRequest();
GetContentResponse contentresponse = new GetContentResponse();
querypresentationelementresponse = presentationElementId(client);
List<string> chunks = new List<string>();
for (int i = 0; i < querypresentationelementresponse.IDs.Length; i += 25)
{
chunks.AddRange(querypresentationelementresponse.IDs.Skip(i).Take(25));
contentresponse = client.GetContent(new GetContentRequest()
{
IDs = chunks.ToArray()
});
}
return contentresponse;
}
I'm not sure what type IDs is or what line is giving you that error, but if I had to guess, I think its IDs = chunks.
It sounds like you are trying to convert a list to a string array. You need to use a method to convert using toArray().
Edit: Ok, you have an array of string arrays. You need to grab the correct one with:
IDs = Chunks.ToArray()[index]
Where index is the correct array. Not terribly familiar with the libraries you are working with, so I unfortunately cannot elaborate. However, to take a wild guess, try using i in place of index.
I must be missing something, but I can't seem to figure out how to get an Attribute by Name/String, only by an Integer, which is likely to change (the Attribute Name is not).
Could you explain how I get Attributes by name/string? The string "active" attempt produces this error:
Error 82 The best overloaded method match for 'System.Collections.Generic.List<Amazon.SimpleDB.Model.Attribute>.this[int]' has some invalid argumens
Thank you!
Hairgami
using (sdb = AWSClientFactory.CreateAmazonSimpleDBClient(accessKeyID, secretAccessKeyID))
{
String selectExpression = string.Format("select * from apps where appid = '{0}'", appID);
SelectRequest selectRequestAction = new SelectRequest().WithSelectExpression(selectExpression);
SelectResponse selectResponse = sdb.Select(selectRequestAction);
if (selectResponse.IsSetSelectResult())
{
SelectResult selectResult = selectResponse.SelectResult;
foreach (Item item in selectResult.Item)
{
//Works fine
Amazon.SimpleDB.Model.Attribute id = item.Attribute[1];
//How can I do this:
Amazon.SimpleDB.Model.Attribute id = item.Attribute["active"];
}
}
else
{
}
}
You're trying to access a System.Collections.Generic.List<T> like it's an associative array, which it's not. The Enumerable.FirstOrDefault method could be used to achieve something similar:
Amazon.SimpleDB.Model.Attribute id =
item.Attribute.FirstOrDefault(attr => attr.Name == "active");
I have an ArrayList that import records from a database.
Is there any method to check whether the arrayList contains schname that i want to match to another list which is an api?
List<PrimaryClass> primaryList = new List<PrimaryClass>(e.Result);
PrimaryClass sc = new PrimaryClass();
foreach (string item in str)
{
for (int a = 0; a <= e.Result.Count - 1; a++)
{
string schname = e.Result.ElementAt(a).PrimarySchool;
string tophonour = e.Result.ElementAt(a).TopHonour;
string cca = e.Result.ElementAt(a).Cca;
string topstudent = e.Result.ElementAt(a).TopStudent;
string topaggregate = e.Result.ElementAt(a).TopAggregate;
string topimage = e.Result.ElementAt(a).TopImage;
if (item.Contains(schname))
{
}
}
}
This is what I have come up with so far, kindly correct any errors that I might have committed. Thanks.
How about ArrayList.Contains?
Try this
foreach( string row in arrayList){
if(row.contains(searchString)){
//put your code here.
}
}
Okay, now you've shown that it's actually a List<T>, it should be easy with LINQ:
if (primaryList.Any(x => item.Contains(x.PrimarySchool))
Note that you should really consider using foreach instead of a for loop to iterate over a list, unless you definitely need the index... and if you're dealing with a list, using the indexer is simpler than calling ElementAt.
// check all types
var containsAnyMatch = arrayList.Cast<object>().Any(arg => arg.ToString() == searchText);
// check strings only
var containsStringMatch = arrayList.OfType<string>().Any(arg => arg == searchText);
I got one big question.
I got a linq query to put it simply looks like this:
from xx in table
where xx.uid.ToString().Contains(string[])
select xx
The values of the string[] array would be numbers like (1,45,20,10,etc...)
the Default for .Contains is .Contains(string).
I need it to do this instead: .Contains(string[])...
EDIT : One user suggested writing an extension class for string[]. I would like to learn how, but any one willing to point me in the right direction?
EDIT : The uid would also be a number. That's why it is converted to a string.
Help anyone?
spoulson has it nearly right, but you need to create a List<string> from string[] first. Actually a List<int> would be better if uid is also int. List<T> supports Contains(). Doing uid.ToString().Contains(string[]) would imply that the uid as a string contains all of the values of the array as a substring??? Even if you did write the extension method the sense of it would be wrong.
[EDIT]
Unless you changed it around and wrote it for string[] as Mitch Wheat demonstrates, then you'd just be able to skip the conversion step.
[ENDEDIT]
Here is what you want, if you don't do the extension method (unless you already have the collection of potential uids as ints -- then just use List<int>() instead). This uses the chained method syntax, which I think is cleaner, and
does the conversion to int to ensure that the query can be used with more providers.
var uids = arrayofuids.Select(id => int.Parse(id)).ToList();
var selected = table.Where(t => uids.Contains(t.uid));
If you are truly looking to replicate Contains, but for an array, here is an extension method and sample code for usage:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ContainsAnyThingy
{
class Program
{
static void Main(string[] args)
{
string testValue = "123345789";
//will print true
Console.WriteLine(testValue.ContainsAny("123", "987", "554"));
//but so will this also print true
Console.WriteLine(testValue.ContainsAny("1", "987", "554"));
Console.ReadKey();
}
}
public static class StringExtensions
{
public static bool ContainsAny(this string str, params string[] values)
{
if (!string.IsNullOrEmpty(str) || values.Length > 0)
{
foreach (string value in values)
{
if(str.Contains(value))
return true;
}
}
return false;
}
}
}
Try the following.
string input = "someString";
string[] toSearchFor = GetSearchStrings();
var containsAll = toSearchFor.All(x => input.Contains(x));
LINQ in .NET 4.0 has another option for you; the .Any() method;
string[] values = new[] { "1", "2", "3" };
string data = "some string 1";
bool containsAny = values.Any(data.Contains);
Or if you already have the data in a list and prefer the other Linq format :)
List<string> uids = new List<string>(){"1", "45", "20", "10"};
List<user> table = GetDataFromSomewhere();
List<user> newTable = table.Where(xx => uids.Contains(xx.uid)).ToList();
How about:
from xx in table
where stringarray.Contains(xx.uid.ToString())
select xx
This is an example of one way of writing an extension method (note: I wouldn't use this for very large arrays; another data structure would be more appropriate...):
namespace StringExtensionMethods
{
public static class StringExtension
{
public static bool Contains(this string[] stringarray, string pat)
{
bool result = false;
foreach (string s in stringarray)
{
if (s == pat)
{
result = true;
break;
}
}
return result;
}
}
}
This is a late answer, but I believe it is still useful.
I have created the NinjaNye.SearchExtension nuget package that can help solve this very problem.:
string[] terms = new[]{"search", "term", "collection"};
var result = context.Table.Search(terms, x => x.Name);
You could also search multiple string properties
var result = context.Table.Search(terms, x => x.Name, p.Description);
Or perform a RankedSearch which returns IQueryable<IRanked<T>> which simply includes a property which shows how many times the search terms appeared:
//Perform search and rank results by the most hits
var result = context.Table.RankedSearch(terms, x => x.Name, x.Description)
.OrderByDescending(r = r.Hits);
There is a more extensive guide on the projects GitHub page: https://github.com/ninjanye/SearchExtensions
Hope this helps future visitors
Linq extension method. Will work with any IEnumerable object:
public static bool ContainsAny<T>(this IEnumerable<T> Collection, IEnumerable<T> Values)
{
return Collection.Any(x=> Values.Contains(x));
}
Usage:
string[] Array1 = {"1", "2"};
string[] Array2 = {"2", "4"};
bool Array2ItemsInArray1 = List1.ContainsAny(List2);
I believe you could also do something like this.
from xx in table
where (from yy in string[]
select yy).Contains(xx.uid.ToString())
select xx
So am I assuming correctly that uid is a Unique Identifier (Guid)? Is this just an example of a possible scenario or are you really trying to find a guid that matches an array of strings?
If this is true you may want to really rethink this whole approach, this seems like a really bad idea. You should probably be trying to match a Guid to a Guid
Guid id = new Guid(uid);
var query = from xx in table
where xx.uid == id
select xx;
I honestly can't imagine a scenario where matching a string array using "contains" to the contents of a Guid would be a good idea. For one thing, Contains() will not guarantee the order of numbers in the Guid so you could potentially match multiple items. Not to mention comparing guids this way would be way slower than just doing it directly.
You should write it the other way around, checking your priviliged user id list contains the id on that row of table:
string[] search = new string[] { "2", "3" };
var result = from x in xx where search.Contains(x.uid.ToString()) select x;
LINQ behaves quite bright here and converts it to a good SQL statement:
sp_executesql N'SELECT [t0].[uid]
FROM [dbo].[xx] AS [t0]
WHERE (CONVERT(NVarChar,[t0].[uid]))
IN (#p0, #p1)',N'#p0 nvarchar(1),
#p1 nvarchar(1)',#p0=N'2',#p1=N'3'
which basicly embeds the contents of the 'search' array into the sql query, and does the filtering with 'IN' keyword in SQL.
I managed to find a solution, but not a great one as it requires using AsEnumerable() which is going to return all results from the DB, fortunately I only have 1k records in the table so it isn't really noticable, but here goes.
var users = from u in (from u in ctx.Users
where u.Mod_Status != "D"
select u).AsEnumerable()
where ar.All(n => u.FullName.IndexOf(n,
StringComparison.InvariantCultureIgnoreCase) >= 0)
select u;
My original post follows:
How do you do the reverse? I want to
do something like the following in
entity framework.
string[] search = new string[] { "John", "Doe" };
var users = from u in ctx.Users
from s in search
where u.FullName.Contains(s)
select u;
What I want is to find all users where
their FullName contains all of the
elements in `search'. I've tried a
number of different ways, all of which
haven't been working for me.
I've also tried
var users = from u in ctx.Users select u;
foreach (string s in search) {
users = users.Where(u => u.FullName.Contains(s));
}
This version only finds those that
contain the last element in the search
array.
The best solution I found was to go ahead and create a Table-Valued Function in SQL that produces the results, such as ::
CREATE function [dbo].[getMatches](#textStr nvarchar(50)) returns #MatchTbl table(
Fullname nvarchar(50) null,
ID nvarchar(50) null
)
as begin
declare #SearchStr nvarchar(50);
set #SearchStr = '%' + #textStr + '%';
insert into #MatchTbl
select (LName + ', ' + FName + ' ' + MName) AS FullName, ID = ID from employees where LName like #SearchStr;
return;
end
GO
select * from dbo.getMatches('j')
Then, you simply drag the function into your LINQ.dbml designer and call it like you do your other objects. The LINQ even knows the columns of your stored function. I call it out like this ::
Dim db As New NobleLINQ
Dim LNameSearch As String = txt_searchLName.Text
Dim hlink As HyperLink
For Each ee In db.getMatches(LNameSearch)
hlink = New HyperLink With {.Text = ee.Fullname & "<br />", .NavigateUrl = "?ID=" & ee.ID}
pnl_results.Controls.Add(hlink)
Next
Incredibly simple and really utlizes the power of SQL and LINQ in the application...and you can, of course, generate any table valued function you want for the same effects!
I believe that what you really want to do is:
let's imagine a scenario
you have two database
and they have a table of products in common
And you want to select products from the table "A" that id has in common with the "B"
using the method contains would be too complicated to do this
what we are doing is an intersection, and there is a method called intersection for that
an example from msdn:
http://msdn.microsoft.com/en-us/vcsharp/aa336761.aspx#intersect1
int [] numbers = (0, 2, 4, 5, 6, 8, 9);
int [] numbersB = (1, 3, 5, 7, 8);
var = commonNumbers numbersA.Intersect (numbersB);
I think what you need is easily solved with intersection
Check this extension method:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace ContainsAnyProgram
{
class Program
{
static void Main(string[] args)
{
const string iphoneAgent = "Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like...";
var majorAgents = new[] { "iPhone", "Android", "iPad" };
var minorAgents = new[] { "Blackberry", "Windows Phone" };
// true
Console.WriteLine(iphoneAgent.ContainsAny(majorAgents));
// false
Console.WriteLine(iphoneAgent.ContainsAny(minorAgents));
Console.ReadKey();
}
}
public static class StringExtensions
{
/// <summary>
/// Replicates Contains but for an array
/// </summary>
/// <param name="str">The string.</param>
/// <param name="values">The values.</param>
/// <returns></returns>
public static bool ContainsAny(this string str, params string[] values)
{
if (!string.IsNullOrEmpty(str) && values.Length > 0)
return values.Any(str.Contains);
return false;
}
}
}
from xx in table
where xx.uid.Split(',').Contains(string value )
select xx
Try:
var stringInput = "test";
var listOfNames = GetNames();
var result = from names in listOfNames where names.firstName.Trim().ToLower().Contains(stringInput.Trim().ToLower());
select names;
var SelecetdSteps = Context.FFTrakingSubCriticalSteps
.Where(x => x.MeetingId == meetid)
.Select(x =>
x.StepID
);
var crtiticalsteps = Context.MT_CriticalSteps.Where(x =>x.cropid==FFT.Cropid).Select(x=>new
{
StepID= x.crsid,
x.Name,
Checked=false
});
var quer = from ax in crtiticalsteps
where (!SelecetdSteps.Contains(ax.StepID))
select ax;
string texto = "CALCA 40";
string[] descpart = texto.Split(' ');
var lst = (from item in db.InvItemsMaster
where descpart.All(val => item.itm_desc.Contains(val))
select item
).ToList();
Console.WriteLine("ITM".PadRight(10) + "DESC".PadRight(50)+"EAN".PadRight(14));
foreach(var i in lst)
{
Console.Write(i.itm_id.ToString().PadRight(10));
Console.Write(i.itm_desc.ToString().PadRight(50));
Console.WriteLine(i.itm_ean.ToString().PadRight(14));
}
Console.ReadKey();
string[] stringArray = {1,45,20,10};
from xx in table
where stringArray.Contains(xx.uid.ToString())
select xx
Dim stringArray() = {"Pink Floyd", "AC/DC"}
Dim inSQL = From alb In albums Where stringArray.Contains(alb.Field(Of String)("Artiste").ToString())
Select New With
{
.Album = alb.Field(Of String)("Album"),
.Annee = StrReverse(alb.Field(Of Integer)("Annee").ToString())
}