如何获得expando对象的价值#

Question

首先,我将txt文件读入文件夹,然后用expando对象水合对象.

但是现在我想从这些对象中获取一些值来填充listview(winforms).

private void Form1_Load(object sender, EventArgs e)
{                  
    string pattern = "FAC*.txt";
    var directory = new DirectoryInfo(@"C:\\TestLoadFiles");
    var myFile = (from f in directory.GetFiles(pattern)
                  orderby f.LastWriteTime descending
                  select f).First();

    hydrate_object_from_metadata("FAC",listBox3);
    hydrate_object_from_metadata("BL", listBox4);

    this.listBox3.MouseDoubleClick += new MouseEventHandler(listBox3_MouseDoubleClick);
    this.listBox1.MouseClick += new MouseEventHandler(listBox1_MouseClick);
}

void hydrate_object_from_metadata(string tag, ListBox listBox)
{
    SearchAndPopulateTiers(@"C:\TestLoadFiles", tag + "*.txt", tag);
    int count = typeDoc.Count(D => D.Key.StartsWith(tag));

    for (int i = 0; i < count; i++)
    {
        object ob = GetObject(tag + i);
        ///HERE I WOULD LIKE GET DATA VALUE FROM ob object
    }
}

Object GetObject(string foo)
{
    if (typeDoc.ContainsKey(foo))
        return typeDoc[foo];
    return null;
}

void SearchAndPopulateTiers(string path, string extention, string tag)
{
    DirectoryInfo di = new DirectoryInfo(path);
    FileInfo[] files = di.GetFiles(extention);

    int i = 0;
    foreach (FileInfo file in files)
    {
        var x = new ExpandoObject() as IDictionary<string, Object>;

        string[] strArray;
        string s = "";

        while ((s = sr.ReadLine()) != null)
        {
            strArray = s.Split('=');

            x.Add(strArray[0],strArray[1]);

        }

        typeDoc.Add(tag+i,x);
        i++;
    }
}

那么有可能在expando对象上获得价值吗？

Answer 1

var eo = new ExpandoObject();
object value = null;

方法#1:动态

dynamic eod = eo;

value = eod.Foo;

方法#2:IDictionary

var eoAsDict = ((IDictionary<String, Object>)eo);

if (eoAsDict.TryGetValue("Foo", out value))
{
    //  Stuff
}

foreach (var kvp in eoAsDict)
{
    Console.WriteLine("Property {0} equals {1}", kvp.Key, kvp.Value);
}

你不会说是什么typeDoc(是另一个ExpandoObject吗？),但如果你投入x它,并且x是一个ExpandoObject,你可以x退回去,它仍然是一个.x被输入作为IDictionary<String, Object>对该循环内部的引用的事实既不在这里也不在那里.GetObject()返回也没关系object; 输入的引用object可以指任何东西.GetObject()返回的东西的类型是返回的实际内容中固有的,而不是对它的引用.

因此:

dynamic ob = GetObject(tag + i);

要么

var ob = GetObject(tag + i) as IDictionary<String, Object>;

...取决于您是否更愿意以ob.Foo或作为属性访问ob["Foo"].