修复更新AMYields_TR表时，更新状态出错的Bug.

BLL/NTFBLL.cs

@@ -206,7 +206,7 @@ namespace MOKA_Factory_Tools.BLL
         {
             // 赋新值;
             model.Test01 = model.FinalTest = TestResult ? "PASS" : "FAIL";
-            model.Test02 = "NULL";
+            model.Test02 = "null";
             model.ReDo = "0";
             ResultType = model.ResultType = TestResult ? "OncePass" : "RealFail";
             if (!TestResult)
@@ -459,7 +459,8 @@ namespace MOKA_Factory_Tools.BLL
         {
             // 赋新值;
             model.Test01 = model.FinalTest = TestResult ? "PASS" : "FAIL";
-            model.Test02 = "NULL";
+            model.Test02 = "null";
+            model.Test03 = "null";
             model.ReDo = "0";
             ResultType = model.ResultType = TestResult ? "OncePass" : "RealFail";
             if (!TestResult)
@@ -538,7 +539,7 @@ namespace MOKA_Factory_Tools.BLL
             }
             #endregion
             #region 测试第3次
-            if (redo0Model.Test02.ToLower() != "null" && redo0Model.Test03.ToLower() == "null")
+            else if (redo0Model.Test02.ToLower() != "null" && redo0Model.Test03.ToLower() == "null")
             {
                 if ( redo0Model.Test01.ToLower().Equals("pass") && redo0Model.Test01.ToLower().Equals("pass") )
                 {
@@ -592,7 +593,7 @@ namespace MOKA_Factory_Tools.BLL
             }
             #endregion
             #region 测试第4次;
-            if ( redo0Model.Test03.ToLower() != "null" )
+            else if ( redo0Model.Test03.ToLower() != "null" )
             {
                 if ( redo0Model.Test01.ToLower() == "pass" && redo0Model.Test02.ToLower() == "fail" && redo0Model.Test03.ToLower() == "pass" && redo0Model.FinalTest.ToLower() == "pass" && redo0Model.ResultType.ToLower() == "ntf")
                 {