数据表比率

也许像这样的东西可以用?

private Dictionary<String, Int32> GetCounts(DataTable dt)
{
    var result = new Dictionary<String, Int32>();

    foreach (DataRow row in dt.Rows)
    {
        foreach (var v in row.ItemArray)
        {
            string key = (v ?? string.Empty).ToString();

            if (!result.ContainsKey(key))
            {
                result.Add(key, 0);
            }

            result[key]++;
        }
    }

    return result;
}