diff --git a/SGGL/FineUIPro.Web/FineUIPro.Web.csproj b/SGGL/FineUIPro.Web/FineUIPro.Web.csproj
index 1d4f35f8..84bb1c21 100644
--- a/SGGL/FineUIPro.Web/FineUIPro.Web.csproj
+++ b/SGGL/FineUIPro.Web/FineUIPro.Web.csproj
@@ -49,6 +49,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <Prefer32Bit>false</Prefer32Bit>
+    <LangVersion>7.2</LangVersion>
   </PropertyGroup>
   <PropertyGroup>
     <SignAssembly>false</SignAssembly>
diff --git a/SGGL/FineUIPro.Web/HJGL/WeldingManage/PipelineListPDMSIn.aspx.cs b/SGGL/FineUIPro.Web/HJGL/WeldingManage/PipelineListPDMSIn.aspx.cs
index 97621059..6a53ca01 100644
--- a/SGGL/FineUIPro.Web/HJGL/WeldingManage/PipelineListPDMSIn.aspx.cs
+++ b/SGGL/FineUIPro.Web/HJGL/WeldingManage/PipelineListPDMSIn.aspx.cs
@@ -893,17 +893,17 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                         result.Add("第" + (i + 1).ToString() + "行," + "探伤类型" + "," + "此项为必填项！" + "|");
                     }
 
-                    string col7 = pds[i].H;
+                    string col7 = Convert.ToString(pds[i].H);
                     if (!string.IsNullOrEmpty(col7))
                     {
                         pipeline.DesignTemperature = col7;
                     }
-                    string col8 = pds[i].I;
+                    string col8 = Convert.ToString(pds[i].I);
                     if (!string.IsNullOrEmpty(col8))
                     {
                         pipeline.DesignPress = col8;
                     }
-                    string col9 = pds[i].J;
+                    string col9 = Convert.ToString(pds[i].J);
                     if (!string.IsNullOrEmpty(col9))
                     {
                         var TestMedium = getTestMedium.FirstOrDefault(x => x.MediumName == col9);
@@ -918,12 +918,12 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                             pipeline.TestMediumName = col9;
                         }
                     }
-                    string col10 = pds[i].K;
+                    string col10 = Convert.ToString(pds[i].K);
                     if (!string.IsNullOrEmpty(col10))
                     {
                         pipeline.TestPressure = col10;
                     }
-                    string col11 = pds[i].L;
+                    string col11 = Convert.ToString(pds[i].L);
                     if (!string.IsNullOrEmpty(col11))
                     {
                         var PressurePipingClass = getPressurePipingClass.FirstOrDefault(x => x.PressurePipingClassCode == col11);
@@ -938,7 +938,7 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                             pipeline.PressurePipingClassCode = col11;
                         }
                     }
-                    string col12 = pds[i].M;
+                    string col12 = Convert.ToString(pds[i].M);
                     if (!string.IsNullOrEmpty(col12))
                     {
                         try
@@ -951,7 +951,7 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                             result.Add("第" + (i + 1).ToString() + "行," + "管线长度(m)格式输入有误" + "|");
                         }
                     }
-                    string col13 = pds[i].N;
+                    string col13 = Convert.ToString(pds[i].N);
                     if (!string.IsNullOrEmpty(col13))
                     {
                         var LeakMedium = getLeakMedium.FirstOrDefault(x => x.MediumName == col13);
@@ -966,12 +966,12 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                             pipeline.LeakMediumName = col13;
                         }
                     }
-                    string col14 = pds[i].O;
+                    string col14 = Convert.ToString(pds[i].O);
                     if (!string.IsNullOrEmpty(col14))
                     {
                         pipeline.LeakPressure = col14;
                     }
-                    string col15 = pds[i].P;
+                    string col15 = Convert.ToString(pds[i].P);
                     if (!string.IsNullOrEmpty(col15))
                     {
                         var PurgeMethod = getPurgeMethod.FirstOrDefault(x => x.PurgeMethodCode == col15);
@@ -987,12 +987,12 @@ namespace FineUIPro.Web.HJGL.WeldingManage
 
                         }
                     }
-                    string col16 = pds[i].Q;
+                    string col16 = Convert.ToString(pds[i].Q);
                     if (!string.IsNullOrEmpty(col16))
                     {
                         pipeline.VacuumPressure = col16;
                     }
-                    string col17 = pds[i].R;
+                    string col17 = Convert.ToString(pds[i].R);
                     if (!string.IsNullOrEmpty(col17))
                     {
                         var material = getMaterial.FirstOrDefault(x => x.MaterialCode == col17);
@@ -1007,10 +1007,10 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                             pipeline.PipeMaterialCode = col17;
                         }
                     }
-                    pipeline.Remark = pds[i].S;
+                    pipeline.Remark = Convert.ToString(pds[i].S);
 
                     // 以下是焊口信息
-                    string col19 = pds[i].T;
+                    string col19 = Convert.ToString(pds[i].T);
                     if (string.IsNullOrEmpty(col19))
                     {
                         result.Add("第" + (i + 1).ToString() + "行," + "焊口号" + "," + "此项为必填项！" + "|");
@@ -1079,7 +1079,7 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                         result.Add("第" + (i + 1).ToString() + "行," + "材质2" + "," + "此项为必填项！" + "|");
                     }
 
-                    string col22 = pds[i].W;
+                    string col22 = Convert.ToString(pds[i].W);
                     string col27 = ""; 
                     if (pds[i].AB!=null)
                     {
@@ -1125,7 +1125,7 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                     }
 
 
-                    var col23 = pds[i].X;
+                    var col23 = Convert.ToString(pds[i].X);
                     if (col23!=null)
                     {
                         try
@@ -1143,7 +1143,7 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                         result.Add("第" + (i + 1).ToString() + "行," + "达因" + "," + "此项为必填项！" + "|");
                     }
 
-                    var col24 = pds[i].Y;
+                    var col24 = Convert.ToString(pds[i].Y);
                     if (col24!=null)
                     {
                         try
@@ -1180,7 +1180,7 @@ namespace FineUIPro.Web.HJGL.WeldingManage
 
                     }
 
-                    string col25 = pds[i].Z;
+                    string col25 = Convert.ToString(pds[i].Z);
                     if (!string.IsNullOrEmpty(col25))
                     {
                         var weldType = getWeldType.FirstOrDefault(x => x.WeldTypeCode == col25);
@@ -1238,7 +1238,7 @@ namespace FineUIPro.Web.HJGL.WeldingManage
                     {
                         result.Add("第" + (i + 1).ToString() + "行," + "焊缝类型" + "," + "此项为必填项！" + "|");
                     }
-                    string col26 = pds[i].AA;
+                    string col26 = Convert.ToString(pds[i].AA);
                     if (!string.IsNullOrEmpty(col26))
                     {
                         var JointAttribute = BLL.DropListService.HJGL_JointAttribute();