diff --git a/.vs/SGGL_SeDin/v17/.wsuo b/.vs/SGGL_SeDin/v17/.wsuo
index 801c4d5d..12d33752 100644
Binary files a/.vs/SGGL_SeDin/v17/.wsuo and b/.vs/SGGL_SeDin/v17/.wsuo differ
diff --git a/SGGL/FineUIPro.Web/HJGL/WeldingManage/WeldJointList.aspx.cs b/SGGL/FineUIPro.Web/HJGL/WeldingManage/WeldJointList.aspx.cs
index 10b5c993..7486a93c 100644
--- a/SGGL/FineUIPro.Web/HJGL/WeldingManage/WeldJointList.aspx.cs
+++ b/SGGL/FineUIPro.Web/HJGL/WeldingManage/WeldJointList.aspx.cs
@@ -426,20 +426,20 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                               select new
                               {
                                   SizeSum = g.Sum(x => x.Size)
-                              }).FirstOrDefault().SizeSum;
+                              }).FirstOrDefault()?.SizeSum;
                 var FieldSum = (from x in q
                               where x.JointAttribute == "安装口"
                               group x by x.UnitWorkId into g
                               select new
                               {
                                   SizeSum = g.Sum(x => x.Size)
-                              }).FirstOrDefault().SizeSum;
+                              }).FirstOrDefault()?.SizeSum;
                 var AllSum = (from x in q
                               group x by x.UnitWorkId into g
                               select new
                               {
                                   SizeSum = g.Sum(x => x.Size)
-                              }).FirstOrDefault().SizeSum;
+                              }).FirstOrDefault()?.SizeSum;
                 proSum = (proSum != null) ? proSum : 0;
                 FieldSum = (FieldSum != null) ? FieldSum : 0;
                 ShopSumSize = proSum.ToString() ;