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DataTable.Columns Property

Gets the collection of columns that belong to this table.

Namespace:  System.Data
Assembly:  System.Data (in System.Data.dll)

public DataColumnCollection Columns { get; }

Property Value

Type: System.Data.DataColumnCollection
A DataColumnCollection that contains the collection of DataColumn objects for the table. An empty collection is returned if no DataColumn objects exist.

The DataColumnCollection determines the schema of a table by defining the data type of each column.

The following example prints each value of each row in a table using the Columns property.

private void PrintValues(DataTable table)
{
    foreach(DataRow row in table.Rows)
    {
        foreach(DataColumn column in table.Columns)
        {
            Console.WriteLine(row[column]);
        }
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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