how to get dataTable from arraylist in which dataTable is stored?

Question

I have an ArrayList , it has a string at 0th position and DataTable at 1st position is it possible to get DataTable back?

ArrayList dataModel = new ArrayList();
DataTable dt = new DataTable();
dt.Columns.Add("A");
dt.Columns.Add("B");
dt.Columns.Add("C");
dt.Rows.Add("1","Rahul","Vapi");
dt.Rows.Add("2", "Yash", "Vapi");
dt.Rows.Add("3", "Dinesh", "vapi");

dataModel.Add("this is working for me");
dataModel.Add(dt);

I am getting this error :

Cannot implicitly convert type 'object' to 'System.Data.DataTable'. An explicit conversion exists (are you missing a cast?)

@Pikoh: sure, you should not need to use an `ArrayList` anymore. But your example doesn't help. OP has only two items, a string and a `DataTable`. So if you want to replace this with a generic collection you need to use a `List — Tim Schmelter, Feb 07 '17 at 10:46
@pikoh: because that's how OP uses the arraylist. He doesn't need a way to store multiple string-DataTable combinations which you could handle with a `List>`. There is only one string and one DataTable. Of course he should use two separate variables(local variables, properties or fields) instead or a class that encapsulates both. — Tim Schmelter, Feb 07 '17 at 10:50
Please try this Datatable to Arraylist http://stackoverflow.com/a/3573771/1849024 — imsome1, Feb 07 '17 at 10:51
@TimSchmelter yes, now i see. Anyway, i would use a `Dictionary` and that way you won't need to cast the datatable back. Or,as you say,a class. — Pikoh, Feb 07 '17 at 10:52
@pikoh: If you want to support multiple it would be much better to provide a custom class with two properties and then use a `List`. — Tim Schmelter, Feb 07 '17 at 10:54

score 1 · Accepted Answer · answered Feb 07 '17 at 10:44

1

(are you missing a cast?)

Yes.

DataTable dt = (DataTable) dataModel[1];

answered Feb 07 '17 at 10:44

Tim Schmelter

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how to get dataTable from arraylist in which dataTable is stored?

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