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Questions tagged [keynotfoundexception]

For issues relating to the .NET KeyNotFoundException.

The KeyNotFoundException is an Exception of the .NET that is thrown when the key specified for accessing an element in a collection does not match any key in the collection.

KeyNotFoundException uses the HRESULT COR_E_KEYNOTFOUND, which has the value 0x80131577.

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Best way to handle a KeyNotFoundException

I am using a dictionary to perform lookups for a program I am working on. I run a bunch of keys through the dictionary, and I expect some keys to not have a value. I catch the KeyNotFoundException right where it occurs, and absorb it. All other…
Dan McClain
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When KeyNotFoundException is thrown, how do I see which key wasn't found?

A System.Collections.Generic.Dictionary is throwing KeyNotFoundException, but I can't see which key is supposedly missing. How do I determine this?
aknuds1
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Which mechanism is a better way to extend Dictionary to deal with missing keys and why?

There is a minor annoyance I find myself with a lot - I have a Dictionary that contains values that may or may not be there. So normal behaviour would be to use the indexer, like this: object result = myDictionary["key"]; However,…
Keith
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KeyNotFoundException with using HtmlEntity.DeEntitize() method

I am currently working on a scraper written in C# 4.0. I use variety of tools, including the built-in WebClient and RegEx features of .NET. For a part of my scraper I am parsing a HTML document using HtmlAgilityPack. I got everything to work as I…
Sebastian Brandes
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Having trouble getting NUnit's Assert.Throws to work properly

I could have sworn that I've used NUnit's Assert.Throws to determine whether or not a particular exception gets thrown from a method, but my memory has failed me before. I read this post here on SO, but it didn't answer my question, as I know the…
Dave
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C# dictionary<> missing key

When i do val = dict["nonexistent key"] i get System.Collections.Generic.KeyNotFoundException Is there a way i have my dictionary call a member function with the key as a param to generate a value? -edit- Maybe i should of been more specific. I want…
user34537
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Dictionary.GetKey Returns False Even Though Key Is Present - GetHashCode/Equals Already Overridden

This is in C#. I have a problem whereby Dictionary.ContainsKey returns false even though I know the key to be in there. I don't have any code to show unfortunately. The code is not easy to pull together; it is spread across multiple classes and…
ck.
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Xamarin Studio creates files with wrong namespace

i'm currently using Xamarin Studio and i'm developing an app with the MvvmCross framework. My issue is that, when I try to create a new file in my folder named "Views", the namespace does not contain the ".Views". I have Xamarin.Client.iOS instead…
Alexandre D.
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C# Dictionary throws KeyNotFoundException when key exists

I am storing a 2D array that represents a distance matrix between vectors as a Dictionary. My implementation of DistanceCell has two string fields representing the vectors being compared. class DistanceCell { public string…
StrangerLoop
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CRM 2011 KeyNotFoundException exception

I am new to CRM development. I have a Custom Entity "customer". This Entity has a Field called "defaultcustomer", which can be TRUE or FALSE. I am working on a Plug-In where i need to set the "defaultcustomer" to FALSE for all the "Customers". I am…
Yaqub Ahmad
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How to add files to archive using SevenZipSharp

First of all what I want to do: I have a list of files I'd like to add to the same archive. The folder structure to this files should be included to the archive. The problem I have is that I can not add files to an existing archive. When I use…
wol
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KeyNotFoundException : The given key was not present in the dictionary

I am receiving KeyNotFoundException whenever I try to access the key in dictionary. I have a PricingRules class which has a dictionary: public class PricingRules { Dictionary pricing_rules; public PricingRules() { …
Syed Hussain
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Can't connect to MySQL database due to KeyNotFoundException

Not sure why I get an error every single time i try to connect. I tried so many things. When i type the wrong password while connecting manually it says access not granted or whatever so I know it connects but when it connects I get this weird…
user5977154
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'The given key was not present in the dictionary' - but the key exists

I am currently developing a MS Dynamics CRM 2013 - Plugin. When I try to assign a string-value to a key of a field of an entity it gives me the 'keynotfound'-exception. This leaves me clueless, because I can verify the key is existing. The key I…
ChrisJu
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KeyNotFoundException at dictionary with string key

I failed to get value with string key ... Dictionary dateDic = new Dictionary(); ... public void GetDataList(string _code, int _startDate, int _limit, out List _list) { _list = (from data in…
user2523112
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