Untitled

using System;
using System.Text;

            var str = Context.Field("pPaymentDescriptionRawData").Text;
            
            if (!string.IsNullOrEmpty(str))
            {
                String[] kwords = new[] {"по договору", "по дог.","по дог","по ген. согл. ","ПО КОНТРАКТ №","ПО ДОГОВОРУ","ПО ДОГ.","ПО ДОГ","ДИЛ. ДОГ."};
                String[] arr = str.Split(kwords, StringSplitOptions.RemoveEmptyEntries);
                //>DMA
                if (arr.Length <= 1)
                {
                   kwords = new[] {"дог"};
                   arr = str.Split(kwords, StringSplitOptions.RemoveEmptyEntries); 
                }
                //<DMA
                if (arr.Length > 1)
                {
                    String rightPart = arr[1].Trim();
                    //>DMA
                    //String[] arr2 = rightPart.Split(' ');
                    if (rightPart.IndexOf("от") > 0)
                    { 
                        if (rightPart.Substring(rightPart.IndexOf("от")-1, 1) != " ")
                        {
                           rightPart = rightPart.Substring(1, rightPart.IndexOf("от")-1) + ' ' + rightPart.Substring(rightPart.IndexOf("от"));
                        }
                    } 
                    String[] arr2 = rightPart.Split(' ');
                    //><DMA
                    if (arr2.Length > 2)
                    {
                        String docNum = arr2[0].Length > 2 ? arr2[0] : arr2[1];
                        docNum = docNum.Replace("\r\n","").Replace(" ","").Replace(".N","").Replace("№","").Replace("\n","").Trim();
                        // String dt = arr2[0].Length > 2 ? arr2[2] : arr2[3];
                        String dt = arr2[0].Length == 1 ? arr2[3] : arr2[1].ToLower().Contains("от") && arr2[1].Length > 2 ? arr2[1].Replace("ОТ","").Replace("от","").Replace("\r\n","") : arr2[2];
                        bool isDate = false;
                        var dtTemp = DateTime.Now;
                        dt = dt.Trim();
                        dt = dt.Length > 10 ? dt.Remove(10) : dt;
                        Context.Field("txtPaymentDescAgreementNum").Text = docNum;
                        isDate = DateTime.TryParse(dt, out dtTemp);
                        if(isDate)                 
                        Context.Field("txtPaymentDescAgreementDate").Text = dt;
                    }
                }
            }