修改EDI的生成方法，增加字段null报错问题

Myshipping.Application/EDI/YTEdiHelper.cs

@@ -217,6 +217,10 @@ namespace Myshipping.Application.EDI.YT
         #region 格式化每行
         public static List<System.String> formatlengthStr(string str, int length, bool formatstr = false, bool nodelsp = false)
         {
+            //2022-12-28 JHQ 传的字段是null会导致报错，这里改为如果是NULL则默认赋空字符串。
+            if (str == null)
+                str = "";
+
             str = str.Replace("\r\n", "\\");
             str = str.Replace("\n", "\\");
             str = str.Replace("\r", " ");
@@ -708,7 +712,7 @@ namespace Myshipping.Application.EDI.YT
                     + ":" + bill.ORDERNO//2	REFERENCE NO.	运编号	X(35)	一般为流水号	M
                     + ":" + bill.MBLNO//3	B\L NO.	提单号	X(20)	船公司的提单号	C
                     + ":" + bill.SERVICE//4	DELIVERY TERM	交货条款	X(9)	CY-CY(pier-pier/port):30CY-CFS(pier/port-door):29CFS-CY(door-pier/port):28CFS-CFS(door-door):27	M
-                    + ":" + formatEdiStr("txt", InttrEdi.ForWarderName.Replace("\n", " ").Replace("\r", " "))//5	BOOKING PARTY	订舱人说明	X(70)	货代方企业名称或代码	C
+                    + ":" + formatEdiStr("txt", !string.IsNullOrWhiteSpace(InttrEdi.ForWarderName)?InttrEdi.ForWarderName.Replace("\n", " ").Replace("\r", " "):"")//5	BOOKING PARTY	订舱人说明	X(70)	货代方企业名称或代码	C
                     + ":" + InttrEdi.RECEIVECODE//6	ISSUE PARTY CODE	签单人代码	X(13)	即接受订舱的人的代码	M
                     + ":"//7	ISSUE PARTY	签单人说明	X(35)	　	C
                     + ":"//8	APPLICANT	询价单位	X(13)	向船公司询价的单位代码	C
@@ -735,7 +739,7 @@ namespace Myshipping.Application.EDI.YT
                     + ":" + bill.ORDERNO//2	REFERENCE NO.	运编号	X(35)	一般为流水号	M
                     + ":" + bill.MBLNO//3	B\L NO.	提单号	X(20)	船公司的提单号	C
                     + ":" + bill.SERVICE//4	DELIVERY TERM	交货条款	X(9)	CY-CY(pier-pier/port):30CY-CFS(pier/port-door):29CFS-CY(door-pier/port):28CFS-CFS(door-door):27	M
-                    + ":" + formatEdiStr("txt", InttrEdi.ForWarderName.Replace("\n", " ").Replace("\r", " "))//5	BOOKING PARTY	订舱人说明	X(70)	货代方企业名称或代码	C
+                    + ":" + formatEdiStr("txt", !string.IsNullOrWhiteSpace(InttrEdi.ForWarderName)?InttrEdi.ForWarderName.Replace("\n", " ").Replace("\r", " "):"")//5	BOOKING PARTY	订舱人说明	X(70)	货代方企业名称或代码	C
                     + ":" + InttrEdi.RECEIVECODE//6	ISSUE PARTY CODE	签单人代码	X(13)	即接受订舱的人的代码	M
                     + ":"//7	ISSUE PARTY	签单人说明	X(35)	　	C
                     + ":"//8	APPLICANT	询价单位	X(13)	向船公司询价的单位代码	C
@@ -818,7 +822,7 @@ namespace Myshipping.Application.EDI.YT
 
                 List<System.String> ShippingList = formatlengthStr(Shipping, 70);
 
-                if (Shipping != "")
+                if (!string.IsNullOrWhiteSpace(Shipping))
                 {
                     r.WriteLine("17:" + formatListStr(ShippingList, 5) + "'");
                     icount++;
@@ -865,10 +869,10 @@ namespace Myshipping.Application.EDI.YT
                 }
 
 
-                Shipping = formatEdiStr("txt", bill.NOTIFYPARTY2);
+                Shipping = formatEdiStr("txt", !string.IsNullOrWhiteSpace(bill.NOTIFYPARTY2) ? bill.NOTIFYPARTY2 : "");
                 ShippingList = formatlengthStr(Shipping, 35);
 
-                if (Shipping != "")
+                if (!string.IsNullOrWhiteSpace(Shipping))
                 {
 
                     r.WriteLine("23::" + formatListStr(ShippingList, 6) + "'");
@@ -881,7 +885,7 @@ namespace Myshipping.Application.EDI.YT
                 Shipping = bill.AMSCONSIGNEE;
                 ShippingList = formatlengthStr(Shipping, 35);
 
-                if (Shipping != "")
+                if (!string.IsNullOrWhiteSpace(Shipping))
                 {
                     r.WriteLine("24::" + formatListStr(ShippingList, 6, true) + "'");
                     icount = icount + 1;
@@ -892,7 +896,7 @@ namespace Myshipping.Application.EDI.YT
                 Shipping = bill.AMSNOTIFYPARTY;
                 ShippingList = formatlengthStr(Shipping, 35);
 
-                if (Shipping != "")
+                if (!string.IsNullOrWhiteSpace(Shipping))
                 {
                     r.WriteLine("25::" + formatListStr(ShippingList, 6, true) + "'");
                     icount = icount + 1;
@@ -973,7 +977,7 @@ namespace Myshipping.Application.EDI.YT
                         }
                     }
                 }
-                if (strtemp != "")
+                if (!string.IsNullOrWhiteSpace(strtemp))
                 {
                     r.WriteLine(strtemp + "'");
                     icount = icount + 1;
@@ -1069,7 +1073,7 @@ namespace Myshipping.Application.EDI.YT
 
                                     for (var i = 0; i < ShippingList.Count; i++)
                                     {
-                                        if (ShippingList[i] != "")
+                                        if (!string.IsNullOrWhiteSpace(ShippingList[i]))
                                         {
                                             if (m <= 5)
                                             {
@@ -1093,7 +1097,7 @@ namespace Myshipping.Application.EDI.YT
                                         }
                                     }
                                 }
-                                if (strtemp != "")
+                                if (!string.IsNullOrWhiteSpace(strtemp))
                                 {
                                     r.WriteLine(strtemp + "'");
                                     icount = icount + 1;