diff --git a/MECF.Framework.UI.Client/TrayThickness/HistoryData/HistoryCoatingSqlHelp.cs b/MECF.Framework.UI.Client/TrayThickness/HistoryData/HistoryCoatingSqlHelp.cs
index ccba8d2..c4c5cd5 100644
--- a/MECF.Framework.UI.Client/TrayThickness/HistoryData/HistoryCoatingSqlHelp.cs
+++ b/MECF.Framework.UI.Client/TrayThickness/HistoryData/HistoryCoatingSqlHelp.cs
@@ -52,7 +52,7 @@ namespace MECF.Framework.UI.Client.TrayThickness.HistoryData
                         $"or ring_outer_number = '{name}'";
 
             var dtAll = QueryDataClient.Instance.Service.QueryData(cmdAllName);
-            if (dtAll.Rows.Count != 0)
+            if (dtAll !=null && dtAll.Rows.Count != 0)
             {
                 for (int i = 0; i < dtAll.Rows.Count; i++)
                 {
@@ -104,6 +104,9 @@ namespace MECF.Framework.UI.Client.TrayThickness.HistoryData
             try
             {
                 var dt = QueryDataClient.Instance.Service.QueryData(cmd);//只能界面用
+                if (dt == null || dt.Rows.Count == 0)
+                    return null;
+
                 for (int i = 0; i < dt.Rows.Count; i++)
                 {
                     if (dt.Rows[i].ItemArray.Length != 0)
@@ -140,6 +143,10 @@ namespace MECF.Framework.UI.Client.TrayThickness.HistoryData
             try
             {
                 var dt = QueryDataClient.Instance.Service.QueryData(cmd);//只能界面用
+
+                if (dt == null || dt.Rows.Count == 0)
+                    return null;
+
                 for (int i = 0; i < dt.Rows.Count; i++)
                 {
                     if (dt.Rows[i].ItemArray.Length != 0)
@@ -173,15 +180,11 @@ namespace MECF.Framework.UI.Client.TrayThickness.HistoryData
             {
                 string tray_numbers = "";
                 string sSql = $"select * from tray_thickness_data where tray_guid like '{tray_guid}'";
-                DataSet ds = DB.ExecuteDataSet(sSql);
-                if (ds == null)
-                {
+                DataSet ds = DB.ExecuteDataset(sSql);
+                if (ds == null || ds.Tables[0].Rows.Count == 0)
                     return false;
-                }
-                if (ds.Tables[0].Rows.Count == 0)
-                {
-                    return false;
-                }
+                
+               
                 tray_numbers = "'" + ds.Tables[0].Rows[0]["tray_number"].ToString() + "','" + ds.Tables[0].Rows[0]["tray_inner_number"].ToString() + "','" + 
                     ds.Tables[0].Rows[0]["ring_inner_number"].ToString() + "','" + ds.Tables[0].Rows[0]["ring_outer_number"].ToString() + "'";
               
@@ -206,11 +209,10 @@ namespace MECF.Framework.UI.Client.TrayThickness.HistoryData
             {
                 string pm_Cmd = "";
                 string sSql = $"select * from pm_thickness_data where pm_guid like '{pmName}' ";
-                DataSet ds = DB.ExecuteDataSet(sSql);
+                DataSet ds = DB.ExecuteDataset(sSql);
                 if (ds == null  || ds.Tables[0].Rows.Count==0)
-                {
                     return false;
-                }
+                
                 pm_Cmd = $"'{ds.Tables[0].Rows[0]["pm_minor_cycle"].ToString()}','{ds.Tables[0].Rows[0]["pm_major_cycle"].ToString()}'";
                 
                 
@@ -236,7 +238,10 @@ namespace MECF.Framework.UI.Client.TrayThickness.HistoryData
             try
             {
                 string sSql = $"select * from tray_thickness_data where tray_guid like '{tray_guid}'";
-                DataSet ds = DB.ExecuteDataSet(sSql);
+                DataSet ds = DB.ExecuteDataset(sSql);
+                if (ds == null || ds.Tables[0].Rows.Count == 0)
+                    return false;
+
                 string cmd = "select tray_coating_thickness , tray_max_thickness,tray_label from tray_thickness_main where ";
                 cmd += $"tray_number='{ds.Tables[0].Rows[0]["tray_number"].ToString()}' " +
                     $"or tray_number = '{ds.Tables[0].Rows[0]["tray_inner_number"].ToString()}' " +
@@ -245,12 +250,11 @@ namespace MECF.Framework.UI.Client.TrayThickness.HistoryData
                     
                 string timeCmd = $" ORDER  BY  create_time DESC LIMIT 4";
                 
-                ds = DB.ExecuteDataSet(cmd+ timeCmd);
+                ds = DB.ExecuteDataset(cmd+ timeCmd);
 
                 if (ds == null || ds.Tables[0].Rows.Count == 0)
-                {
                     return false;
-                }
+
                 for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                 {
                     double coating = double.Parse( ds.Tables[0].Rows[i]["tray_coating_thickness"].ToString());
@@ -279,19 +283,22 @@ namespace MECF.Framework.UI.Client.TrayThickness.HistoryData
             try
             {
                 string sSql = $"select * from pm_thickness_data where pm_guid like '{pmId}'";
-                DataSet ds = DB.ExecuteDataSet(sSql);
+                DataSet ds = DB.ExecuteDataset(sSql);
+                if (ds == null || ds.Tables[0].Rows.Count == 0)
+                    return false;
+
+
                 string cmd = "select pm_coating_thickness , pm_max_thickness,pm_label from pm_thickness_main where ";
                 cmd += $"pm_cycle='{ds.Tables[0].Rows[0]["pm_minor_cycle"].ToString()}' " +
                            $"or pm_cycle = '{ds.Tables[0].Rows[0]["pm_major_cycle"].ToString()}'";
                 
                 string timeCmd = $" ORDER  BY  create_time DESC LIMIT 2";
 
-                ds = DB.ExecuteDataSet(cmd + timeCmd);
+                ds = DB.ExecuteDataset(cmd + timeCmd);
 
                 if (ds == null || ds.Tables[0].Rows.Count == 0)
-                {
                     return false;
-                }
+
                 for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                 {
                     double coating = double.Parse(ds.Tables[0].Rows[i]["pm_coating_thickness"].ToString());