using System.Data;
using System.Text;

namespace YLErp.Helpers
{
    public static class DataTableHelper
    {
        public static string ToStringContent(this DataTable dataTable)
        {
            if (!IsNotEmpty(dataTable)) return string.Empty;
            var stringContent = new StringBuilder();
            foreach (DataRow row in dataTable.Rows)
            {
                for (int i = 0; i < dataTable.Columns.Count; i++)
                {
                    stringContent.Append(dataTable.Columns[i].ColumnName + ":" + row[i].ToString().Trim());
                    stringContent.Append(i == dataTable.Columns.Count - 1 ? "\r\n" : "\t");
                }
            }
            var result = stringContent.ToString();
            return result;
        }

        public static bool IsNotEmpty(this DataTable dataTable)
        {
            if (dataTable != null && dataTable.Rows.Count > 0)
                return true;
            else
                return false;
        }

        public static string ToStringContent(this IDataReader dr)
        {
            if (dr == null) return string.Empty;
            var stringContent = new StringBuilder();
            for (int i = 0; i < dr.FieldCount; i++)
            {
                stringContent.Append(dr.GetName(i) + ":" + (dr.IsDBNull(i) ? "" : dr.GetValue(i)));
                stringContent.Append(i == dr.FieldCount - 1 ? "\r\n" : "\t");
            }
            var result = stringContent.ToString();
            return result;
        }
    }
}