.net - Case Insensitive String Compare In LINQ-to-SQL

May 8, 2009

I've read that it's unwise to use ToUpper and ToLower to perform case-insensitive string comparisons, but I see no alternative when it comes to LINQ-to-SQL. The ignoreCase and CompareOptions arguments of String.Compare are ignored by LINQ-to-SQL (if you're using a case-sensitive database, you get a case-sensitive comparison even if you ask for a case-insensitive comparison). Is ToLower or ToUpper the best option here? Is one better than the other? I thought I read somewhere that ToUpper was better, but I don't know if that applies here. (I'm doing a lot of code reviews and everyone is using ToLower.)

[Code]....

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Linq Join On Parameterized Distinct Key CASE INSENSITIVE?

Oct 7, 2010

To revisit a previous question with a further stipulation..Anyone know how to do the following, IGNORING CASE?

[Code]...

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Dec 8, 2006

Is there any way to use Dim Str as String = "UPPERlower"Str.Contains("UpperLower") and have it return true?

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Sep 8, 2010

I've been using text.indexof() to see if a string is located inside another string, however is it it possible to do a case sensitive/insensitive search option? I've been looking around Google and not having much luck with it.

A huge bonus would be if it could count the number of occurrences inside the string!

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Case Insensitive Contains Method

Oct 29, 2009

I am using the contains method to look through an array to find matches, however I notice that when I use it it is case sensitive. Is there another method I can use to do a case insensitive search or some way to modify the contains method to search case insensitively? [code]

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Sep 9, 2011

I am using this code to get a list of files in a folder:

Dim files() As String = (From file In New IO.DirectoryInfo(myFolder).GetFiles Where file.Extension = ".exe" Select file.Name).ToArray

This works fine, but the problem is that it selects only files with the extension of "exe" & skips files that have an "EXE" extension. Is there any way to make it case-insensitive, to make it return any combination of upper/lower case letters in the extension?

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Jul 21, 2010

I dislike WPF's inability to interpret text in a case-insensitive way.Are there any tools (i.e. VS plugins) out there that will take my VB .NET code and handle the case-sensitivity issues for me?Edit: Now with examples.

Input:

<Dockpanel DockPanel.Dock="Bottom">
<Label Content="(c) blahblah" HorizontalAlignment="Left" Name="Label2" VerticalAlignment="Bottom" Opacity=".75" Background="White" DockPanel.Dock="bottom"/>
</DockPanel>

Output:

<DockPanel DockPanel.Dock="Bottom">
<Label Content="(c) blahblah" HorizontalAlignment="Left" Name="Label2" VerticalAlignment="Bottom" Opacity=".75" Background="White" DockPanel.Dock="Bottom"/>
</DockPanel>

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Nov 28, 2010

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my question is what are the advantages of c# over vb knowing that both get compiled to MSIL so there is almost no performance difference between the two languages?

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I have spend a couple of hours trying to figure out why my generic Dictionary(Of String, String) is not ignoring case.Here is my code:

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[code].....

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Apr 15, 2012

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<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element minOccurs="0" maxOccurs="unbounded" ref="condition" />
<xs:element minOccurs="0" maxOccurs="unbounded" ref="filter" />
[Code] .....

This wouldn't build in a VB project because VB.NET is case insensitive. I tried deleting one set of and/or, but when the XML is created, it simply ignores the selected value. I also tried appending an X at the end of one the sets which also failed. Is there a way to make this work? I also tried updating the XSD so it just had two values without success. The interesting thing to note is that default is set to "and" and while debugging it will set it to and, it doesn't actually produce the node attribute of it just generates.

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Create A Case-Insensitive TextBox?

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Overcome XML Case Sensitive - Insensitive?

Jan 6, 2012

I have a project to read xml files. It comes from a web service. But it can come sometimes with different attributes.

The standart xml file is like this:
<xml ....>
<car carname="Opel">Opel

[code].....

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Process Name Check Needs To Be Case Insensitive

Oct 25, 2009

I put this at the top of my project:
Option Compare Text

Here is the sub that contains the process name check:
Sub AC3()
Dim ProcessList As System.Diagnostics.Process()
ProcessList = System.Diagnostics.Process.GetProcesses()
Dim Proc As System.Diagnostics.Process
For Each Proc In ProcessList
[Code] .....

No errors, but it only checks the lowercase hack/cheat/inject. I need it to be case insensitive when checking it.

Figured it out and tested and it works. I put, right after dim procname...
procname = procname.ToLower()
works great.

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Dec 27, 2011

I am working on a program for a client and will need a feature to search for strings from an array without case sensitivity. This currently works, but it is case sensitive. I commented out the code for readability.

' Declare array for goldSmithingExpertise and add items.
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[code]....

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VS 2010 List.Contains Case-insensitive Lookup

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If I have a list of filenames in a list, how can I do a case-insensitive lookup?

Dim files As List(Of String) = IO.Directory.GetFiles(myFolder).ToList
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'do something
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The above snippet will only do a case sensitive search.

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Jun 10, 2009

I am searching through files and only want to include files with certain extensions. Right now I have what is below but it would be stupid to do it that way for 3 or more file types and it isn't completely case insensitive.

If ext = ".jpg" Or ext = ".JPG" Then

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[code].....

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Sub SearchSubKeys(ByVal root As RegistryKey, ByVal searchKey As String)
Dim matchtype As String = Nothing
Dim str(5) As String

[Code].....

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Jul 13, 2009

I'm having trouble when trying to do a case-insensitive query on a table. Right now the query is:

txtQuery = "SELECT Status, RankingSearchEngines FROM [tbl-DATA-Client-Keywords] WHERE [Client-ID-Code] = '" & clientNo & "' AND lower(Keyword) LIKE '" & sField(0) & "';"

The actual query executed is:

SELECT Status, RankingSearchEngines FROM [tbl-DATA-Client-Keywords] WHERE [Client-ID-Code] = '1402' AND lower(Keyword) LIKE 'flyer printing';

I have an entry 'Flyer Printing' in the database, and this query works perfectly without the case-insensitive check.I'm not sure if this is an OleDB issue, as I've never had this sort of problem with SQLPlus, or anything else

The exception being thrown is:

IErrorInfo.GetDescription failed with E_FAIL(0x80004005).

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Feb 3, 2012

I am using a path comparison to find any children tags which works well when there is only 1 tag selected. This is my code for when multiples tags are selected but it is not working. Can you point me in the right direction?

Single Tag Selection (working)
Dim tagpath = uxTags.SelectedItem.Text
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[code]...

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[code].....

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Case-sensitive Languages Vs Insensitive Languages?

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Not sure if this is just a bad habit, or a valid way of doing things, but for large complex report queries spanning bunches of tables, I often get my aggregate stats by summing a Case statement.For example:

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[code].....

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such as this:-

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2 fred

[code]....

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Dim UnassignedSubSvc =
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there is two datatable at some datasetsone of them is tbl1 and fileds is (pcode,points) other table is tbl2 and fields is (pcode,stoped)"pcode" is equal at two tables

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I have the following example datatable:[code]And now the user should be able to compare multiple periods. In this example the user chose two periods: 1.1.2010 - 31.12.2010 and 1.1.2011 - 31.12.2011. The result of the example should be:[code]

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[code].....

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