public ColumnMapping GetColumnMappingByColumn(string column)
 {
     if (!String.IsNullOrEmpty(column) && ColumnNameDict.ContainsKey(column))
     {
         return(ColumnNameDict[column]);
     }
     return(null);
 }
 public bool IsContainColumn(string columnname)
 {
     return(ColumnNameDict.ContainsKey(columnname));
 }