动态修改WF流程

 

        private void aaa(object sender, EventArgs e)
        {
            Console.WriteLine("Fix Activity");

            WorkflowChanges changes = new WorkflowChanges(this);    //声明一个修改活动的代理对象
            CodeActivity activity = new CodeActivity();
            activity.ExecuteCode += new EventHandler(activity_ExecuteCode);
            CompositeActivity subContainer = (CompositeActivity)changes.TransientWorkflow.Activities["sequenceActivity1"];  //从代理对象中取出容器
            subContainer.Activities.Add(activity);
            this.ApplyWorkflowChanges(changes); //提交修改
        }

 

 

 

        //动态添加的
        void activity_ExecuteCode(object sender, EventArgs e)
        {
            WorkflowChanges changes = new WorkflowChanges(this);
            SequenceActivity workflowContainer = (SequenceActivity)changes.TransientWorkflow.GetActivityByName("sequenceActivity2");
            InvokeWorkflowActivity subWorkflow = new InvokeWorkflowActivity("subWorkflow");
            subWorkflow.TargetWorkflow = typeof(Workflow3);    //子流程
            workflowContainer.Activities.Add(subWorkflow);
            this.ApplyWorkflowChanges(changes);
        }

 

 

 

            WorkflowChanges wfchange = new WorkflowChanges(this);
            CompositeActivity comactivity = wfchange.TransientWorkflow;
            RuleDefinitions ruleDefinitions = (RuleDefinitions)comactivity.GetValue(RuleDefinitions.RuleDefinitionsProperty);
            RuleConditionCollection conditions = ruleDefinitions.Conditions;
            RuleExpressionCondition condition1 = (RuleExpressionCondition)conditions["条件1"];
            (condition1.Expression as CodeBinaryOperatorExpression).Right = new CodePrimitiveExpression(1);
            this.ApplyWorkflowChanges(wfchange);