Say I want to create (n) DataTables named DT(n)... how can I go about that in a loop.
Pseudo code below
int n=99;
for (int i = 0; i < n; i++)
{
DataTable DT + n = new DataTable(); // <--- this
}
Is this possible?
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Can you use an array?Mike Cheel– Mike Cheel2014-06-05 23:10:30 +00:00Commented Jun 5, 2014 at 23:10
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No, that is not possible. But you could make an array of DataTables or some other collection of them.Matt Greer– Matt Greer2014-06-05 23:11:00 +00:00Commented Jun 5, 2014 at 23:11
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1Use Arrayamit_g– amit_g2014-06-05 23:11:11 +00:00Commented Jun 5, 2014 at 23:11
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5 Answers
Store them in a data structure.
Enumerable.Range(0,n).Select(x => new DataTable()).ToArray()
2 Comments
Tim Schmelter
or simply Enumerable.Repeat(new DataTable(), n)
Preston Guillot
@TimSchmelter That's going to give you
n references to the same instance of DataTable, not n instances of DataTable.No, you can't have dynamic variable names in C#.
You can however, put them into an array (this is a much better approach anyways):
int n=99;
DataTable[] DT = new DataTable[99];
for (int i = 0; i < n; i++)
{
DT[i] = new DataTable();
}
1 Comment
Ben Aaronson
This is much more likely to be helpful to the OP than the fancier answers.
You can't create dynamically named variables in C#. For your purpose you are better off using Arrays or Dictionaries ( http://msdn.microsoft.com/en-us/library/xfhwa508%28v=vs.110%29.aspx )
Comments
try
List<DataTable> DTs = new List<DataTable>();
int n =99;
for(int(i=0;i<n;i++)
{
DataTable DT = new DataTable();
DTs.Add(DT);
}
2 Comments
BradleyDotNET
New is VB, new is C#. They don't mix :)
The Guy with The Hat
This answer turned up in the low quality review queue, presumably because you didn't explain some of the contents. If you do explain this (in your answer), you are far more likely to get more upvotes—and the questioner actually learns something!
Can you try this one
public List<T> CreateObjects<T>(int numbers) where T: new()
{
List<T> _return = new List<T>();
for (int i = 0; i <= numbers; i++)
{
_return.Add(new T());
}
return _return;
}
to use
var myList = CreateObjects<DataTable>(100);
var myList = CreateObjects<AnyClass>(100);
use any object type
2 Comments
BradleyDotNET
While a nice, generic piece of code, this has no explanation and is effectively the same as the LINQ answer (but much more confusing since the question was never about generics).
Mudeyanse
yes I know, but this is just a example for get idea