DataColumn Name from DataRow (not DataTable)

Question

I need to iterate the columnname and column datatype from a specific row. All of the examples I have seen have iterated an entire datatable. I want to pass a single row to a function to do a bunch of conditional processing. I want to separate the conditional processing for ease of readability.

This is what I have:

private void doMore(DataRow dr)
{
    foreach (DataColumn c in dr.ItemArray)  //loop through the columns. 
    {
        MessageBox.Show(c.ColumnName.ToString());
    }
}

The error returned is

System.InvalidCastException: Unable to cast object of type 'System.String' to type 'System.Data.DataColumn'.

How would I get the column name from the row or do I have no choice and must pass the entire datatable to the function?

Answer 1

You would still need to go through the DataTable class. But you can do so using your DataRow instance by using the Table property.

foreach (DataColumn c in dr.Table.Columns)  //loop through the columns. 
{
    MessageBox.Show(c.ColumnName);
}