我有以下与反射相关的问题,我有一个类似下面的方法:

  [TestMethod()]
 public void steamAccess()
        {
            testRead = new TestRead();
            SteamMap a = new SteamMap();

           // Preparing the parameters of the CSV actions
            a.writeMessageParams.UIItemEditText = TestContext.DataRow["SearchQuery"].ToString();

           //Read and Execute the TestMethod
            testRead.Read(a, TestContext);
        }


这是一个CodedUITest,SteamMap是一个类(uiTest map)。
WriteMessageParams是一个类,实际上真正的方法是WriteMessage,但是该类允许我覆盖WriteMessage方法在测试中使用的字符串,并且我计划在其中更动态地制作这部分代码Read方法。 :

   a.writeMessageParams.UIItemEditText = TestContext.DataRow["SearchQuery"].ToString();


我的问题发生在testRead.Read上下文中,如下所示:

当此方法运行时,我可以访问相应实例中的所有操作(在我的情况下为a),如果应该使用我知道的a.writeMessageParams.UIItemEditText上下文,则如何获取信息不是问题,问题是如何使前面提到的代码像我尝试的那样动态运行:

/* I've done this because I know that each method that is supposed to end up with Params, for example a method called WriteMessage, it's class is called WriteMessageParams*/

public void Read(object obj, TestContext testContext)
{
//simplified code
//trying to access/get to the current instance's WriteMessageParam class
Object testObj = obj.GetType().GetMember(subMethod.Code + "Param");

//null
MessageBox.Show(testObj.GetType().ToString());

// trying to access the UIItemEditText field ( which is declared as public) and modify it accordingly
FieldInfo subMethodField = testObj.GetType().GetField("UIItemEditText");
subMethodField.SetValue(testObj,testContext.DataRow[subMethod.CsvColumn].ToString());
}


我已经阅读了这篇文章,并尝试了一些尝试
https://msdn.microsoft.com/en-us/library/6z33zd7h%28v=vs.110%29.aspx

我的问题是我拥有实例的对象,并且尝试访问该对象的类并修改该类的field。

我将不胜感激,
谢谢

编辑1:
这是我尝试访问的类的样子:

public partial class SteamMap
    { //simplified to what classes/methods interest me

            public virtual writeMessageParams writeMessageParams
        {
            get
            {
                if ((this.mwriteMessageParams == null))
                {
                    this.mwriteMessageParams = new writeMessageParams();
                }
                return this.mwriteMessageParams;
            }
        }

public class writeMessageParams
    {

        #region Fields
        /// <summary>
        /// Type 'test' in text box
        /// </summary>
        public string UIItemEditText = "test";
        #endregion
    }
    }


编辑2-我尝试使用GetNestedType,仍然没有成功。

Object testObj = obj.GetType().GetNestedType("writeMessageParams",BindingFlags.Public);
 MessageBox.Show(testObj.GetType().ToString());

最佳答案

如果我了解你,你会有一个像

public partial class SteamMap
{

    private writeMessageParams mwriteMessageParams ;

    public virtual writeMessageParams  writeMessageParams1
    {
        get
        {
            if ((this.mwriteMessageParams == null))
            {
                this.mwriteMessageParams = new writeMessageParams();
            }
            return this.mwriteMessageParams;
        }
    }

    public class writeMessageParams
    {
        public string UIItemEditText = "test";
    }
}


(您的代码无法编译,因为您同时将writeMessageParams作为类和属性,因此我将属性更改为writeMessageParams1)

而且您想更改UIItemEditText,您可以这样做

public void UpdateUI(object obj, string newValue)
{
    var property = obj.GetType().GetProperty("writeMessageParams1");

    var writeMessageParams1 = property.GetValue(obj);


    var uiFld = wp.GetType().GetField("UIItemEditText");

    uiFld.SetValue(writeMessageParams1, newValue);

}


可以这样称呼

SteamMap sm = new SteamMap();
Write(sm, "Hello");


关键是对属性使用.GetProperty,对字段使用.GetField

10-02 11:02