如何反序列化和序列化构建过程中的参数的TFS

问题描述

我想创建一个使用TFS 2013 API的新版本的定义。我不得不提到的流程模板中包含多个自定义活动和参数。在创建生成定义，一些属性值的需要进行动态更新。于是，我试着用下面code反序列化工艺参数为：

I am trying to create a new build definition using TFS 2013 API. The process template that I have to refer contains several custom activities and parameters. While creating the Build Definition, some of the Property value needs to be updated dynamically. So I tried to Deserialize the process parameters using below code:

IDictionary<string, object> processParams = WorkflowHelpers.DeserializeProcessParameters(defaultTemplate.Parameters);

这code总是引发异常如下：

This code always throwing below exception:

An unhandled exception of type 'System.Xaml.XamlObjectWriterException' occurred in System.Xaml.dll

Additional information: No matching constructor found on type 'System.Activities.Activity'. You can use the Arguments or FactoryMethod directives to construct this type.

这是很无奈，我不能让尚未摆脱这种错误。

This is really frustrating and I can't get rid of this error yet.

我也试图反序列化使用下面code中的工艺参数为：

I have also tried to deserialize the process parameters using below code:

using (StringReader stringReader = new StringReader(parameterValues))
{
    object obj = XamlServices.Load(
          ActivityXamlServices.CreateReader(
              new XamlXmlReader((TextReader)stringReader, new XamlXmlReaderSettings { LocalAssembly  = System.Reflection.Assembly.GetExecutingAssembly() }
    )));
}

这个工作，但是当我把它序列化再次使用 XamlServices.Save（作家的XamlWriter，对象实例）方法，参数得到了改变这是不符合构建工作流程兼容。

This works but when I serialize it again using XamlServices.Save(XamlWriter writer, object instance) method, the parameters got changed which is not compatible with build workflow.

那么，怎样才能在这里我更新生成过程参数？可以在 WorkflowHelpers 类可以用其他方式使用吗？或者有没有其他的办法，这样它就总是体现在构建定义更新的工艺参数。任何帮助高度AP preciated。

So, how can I update the build process parameters here ? Can the WorkflowHelpers class can be used in other ways ? Or is there any other way to update the process parameters so that it gets reflected in the build definition. Any help is highly appreciated.

推荐答案

这是现在工作的罚款。
下面是新的code：

This is working fine now.Below is new code:

IDictionary<string, object> processParams = WorkflowHelpers.DeserializeProcessParameters(defaultTemplate.ProcessParameters);

而不是 defaultTemplate.Parameters ，我需要通过 defaultTemplate.ProcessParameters

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