diff --git a/Cyberpipe.suo b/Cyberpipe.suo
index 9fb7248..2c67d44 100644
--- a/Cyberpipe.suo
+++ b/Cyberpipe.suo
Binary files differ

diff --git a/Cyberpipe.suo b/Cyberpipe.suo
index 9fb7248..2c67d44 100644
--- a/Cyberpipe.suo
+++ b/Cyberpipe.suo
Binary files differ
diff --git a/MainFrm.cs b/MainFrm.cs
index 5822ae8..e269862 100644
--- a/MainFrm.cs
+++ b/MainFrm.cs
@@ -2506,7 +2506,7 @@
                                 if ((pipelineType == "给水") || (pipelineType == "天然气") || (pipelineType == "燃气"))
                                 {
                                     GSOFeatures fs = Intersect_PointLayerByType(polygon, pipelineType, "阀门");
-                                    list.Add(fs);
+                                    if (fs != null) list.Add(fs);
                                 }
                             }
                         }
@@ -2523,7 +2523,7 @@
                         for (int i = 0; i < m_PipelineLayerNames.Count; i++)
                         {
                             GSOFeatures fs = Intersects_Pipeline(polygon, m_PipelineLayerNames[i]);
-                            list1.Add(fs);
+                           if(fs!=null) list1.Add(fs);
                         }
 
                         FrmAllPipelineStatis frm1 = new FrmAllPipelineStatis(0, pipeLineDis, list1, dataGridViewX1, toolStripNumbers, toolStripFeatureLength, globeControl1, panelOfTable);
@@ -2547,7 +2547,7 @@
                                         f.HighLight = true;
                                     }
                                 }
-                                list2.Add(fs);
+                                if(fs!=null) list2.Add(fs);
                             }
                         }
 
@@ -2578,7 +2578,7 @@
                                         if ((accname.IndexOf("井") > 0) || (accname.IndexOf("孔") > 0) || (accname.IndexOf("篦") > 0))
                                         {
                                             GSOFeatures fs = Intersect_PointLayerByType(polygon, pipelineType, dataset.Tables[0].Rows[j][0].ToString());
-                                            listWell.Add(fs);
+                                            if (fs != null)  listWell.Add(fs);
                                         }
                                     }
                                 }
@@ -2650,7 +2650,7 @@
                         List<GSOFeatures> listBSQ = new List<GSOFeatures>();
 
                         GSOFeatures bsqFeatures = PolygonIntersectAnalysis(e.Polygon, "标识器");
-                        listBSQ.Add(bsqFeatures);
+                        if(bsqFeatures != null) listBSQ.Add(bsqFeatures);
 
                         FrmBSQDuoBianXingStatis bsqFrm = new FrmBSQDuoBianXingStatis(workWellLen, globeControl1, listBSQ);
                         bsqFrm.Show(this);
@@ -2666,7 +2666,7 @@
                         List<GSOFeatures> listBSQ1 = new List<GSOFeatures>();
 
                         GSOFeatures bsqFeatures1 = PolygonIntersectAnalysis(e.Polygon, "标识器");
-                        listBSQ1.Add(bsqFeatures1);
+                        if(bsqFeatures1 != null) listBSQ1.Add(bsqFeatures1);
 
                         FrmBSQDuoBianXingStreet frm2 = new FrmBSQDuoBianXingStreet(globeControl1, bsqFeatures1);
                         frm2.Show(this);