大约有 4,759 项符合查询结果（耗时：0.0310秒） [XML]
Select N random elements from a List in C#
I need a quick algorithm to select 5 random elements from a generic list. For example, I'd like to get 5 random elements from a List<string> .
...
Is there a string math evaluator in .NET?
...s String = "1 + 2 * 7"
Dim result As Double = sc.Eval(expression)
Edit - C# version.
MSScriptControl.ScriptControl sc = new MSScriptControl.ScriptControl();
sc.Language = "VBScript";
string expression = "1 + 2 * 7";
object result = sc.Eval(expression);
MessageBox.Show(result.ToString(...
Escape double quotes in a string
...ither case - there is a single escaped " in it. This is just a way to tell C# that the character is part of the string and not a string terminator.
share
|
improve this answer
|
...
How can I reliably determine the type of a variable that is declared using var at design time?
I'm working on a completion (intellisense) facility for C# in emacs.
8 Answers
8
...
How does comparison operator works with null int?
... it seems that nothing <> 1 = null in VB whereas null != 1 = true in C# - I have been using LinqPad to test the statements
– Luke T O'Brien
May 24 '17 at 10:13
2
...
Checking to see if a DateTime variable has had a value assigned
Is there an easy way within C# to check to see if a DateTime instance has been assigned a value or not?
9 Answers
...
Are string.Equals() and == operator really same? [duplicate]
...s an example using double (from Joseph Albahari’s note to §7.9.2 of the C# language specification):
double x = double.NaN;
Console.WriteLine (x == x); // False
Console.WriteLine (x != x); // True
Console.WriteLine (x.Equals(x)); // True
He goes on to say that the double.Equa...
Best Practice for Forcing Garbage Collection in C#
In my experience it seems that most people will tell you that it is unwise to force a garbage collection but in some cases where you are working with large objects that don't always get collected in the 0 generation but where memory is an issue, is it ok to force the collect? Is there a best practi...
How to pass an array into a SQL Server stored procedure
...
AS
BEGIN
SET NOCOUNT ON;
SELECT ID FROM @List;
END
GO
Now in your C# code:
// Obtain your list of ids to send, this is just an example call to a helper utility function
int[] employeeIds = GetEmployeeIds();
DataTable tvp = new DataTable();
tvp.Columns.Add(new DataColumn("ID", typeof(int))...
Change File Extension Using C#
I have many file types: pdf, tiff, jpeg, bmp. etc.
My question is how can I change file extension?
I tried this:
5 Answers
...