大约有 734 项符合查询结果（耗时：0.0224秒） [XML]
LINQ query on a DataTable
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VB Version: Dim results = From myRow In myDataTable.AsEnumerable _ Where myRow.Field("RowNo") = 1 _ Select myRow
– Jeff
Jul 29 '09 at 20:46
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Copy to clipboard in Node.js?
...'s certainly not the best way, but it works.
I'm on Windows and created a VB.NET application:
Module Module1
Sub Main()
Dim text = My.Application.CommandLineArgs(0)
My.Computer.Clipboard.SetText(text)
Console.Write(text) ' will appear on stdout
End Sub
End Module
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Using LINQ to concatenate strings
...eturns a scalar value. Examples from T-SQL include min, max, and sum. Both VB and C# have support for aggregates. Both VB and C# support aggregates as extension methods. Using the dot-notation, one simply calls a method on an IEnumerable object.
Remember that aggregate queries are executed immediat...
ASP.NET MVC View Engine Comparison
...ers
IntelliSense
can choose any language with a CodeDom provider (e.g. C#, VB.NET, F#, Boo, Nemerle)
on-demand compilation or precompiled views
Cons:
usage is confused by existence of "classic ASP.NET" patterns which no longer apply in MVC (e.g. ViewState PostBack)
can contribute to anti-pattern...
Best general SVN Ignore Pattern?
...SVN ignore pattern with TortoiseSVN and Subversion CLI for native C++, C#/VB.NET, and PERL projects on both Windows and Linux platforms. It works well for me!
Formatted for copy and paste:
*.o *.lo *.la #*# .*.rej *.rej .*~ *~ .#* .DS_Store thumbs.db Thumbs.db *.bak *.class *.exe *.dll *.mine ...
Remove unused references (!= “using”)
... is a feature Visual Studio 2008 already supports. Unfortunately, only for VB .NET projects.
I have opened a suggestion on Microsoft Connect to get this feature for C# projects too:
http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=510326
If you like this feature as...
Max or Default?
...get around this limitation by casting to a nullable within your select. My VB is a little rusty, but I think it'd go something like this:
Dim x = (From y In context.MyTable _
Where y.MyField = value _
Select CType(y.MyCounter, Integer?)).Max
Or in C#:
var x = (from y in context...
Problem with converting int to string in Linq to entities
Is there anyway I can achieve this?
Note, that in VB.NET there is no problem use the first snippet it works just great, VB is flexible, im unable to get used to C#'s strictness!!!
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What is the C# equivalent of NaN or IsNumeric?
...in way to do this, such as javascript's NaN() or IsNumeric() (was that VB, I can't remember?).
15 Answers
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Identify if a string is a number
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Well, VB.NET's IsNumeric() internally uses double.TryParse(), after a number of gyrations that are needed (among other things) for VB6 compatibility. If you don't need compatibility, double.TryParse() is just as simple to use, and ...