Looping notes. The DataTable class allows the use of the foreach-loop and its enumerator. But iterating over the items in a DataRow can be confusing.
An example. We use 2 public instance properties. These are Rows, which returns a typed collection of rows, and ItemArray, which returns a collection of cell values boxed in objects.
using System;
using System.Data;
class Program
{
static void Main()
{
DataTable table = GetTable();
foreach (DataRow row in table.Rows)
{
foreach (var item in row.ItemArray)
{
Console.WriteLine(item);
}
}
}
static DataTable GetTable()
{
DataTable table = new DataTable();
table.Columns.Add("Size", typeof(int));
table.Columns.Add("Category", typeof(string));
table.Columns.Add("Name", typeof(string));
table.Columns.Add("Date", typeof(DateTime));
// Use 1 row for simplicity.
table.Rows.Add(15, "dog", "Spot", DateTime.Now);
return table;
}
}Item: 15
Item: dog
Item: Spot
Item: 11/3/2020 5:33:27 AM
Field foreach. You can also use the generic Field method that receives one type parameter. We can loop over Rows with foreach, and then use Field to get each cell.
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Sam Allen is passionate about computer languages. In the past, his work has been recommended by Apple and Microsoft and he has studied computers at a selective university in the United States.
