如果Object是Dictionary类型，直接返回
如果Object是NameValueCollection类型，则添加到Dictionary里
如果Object是Hashtable类型，添加到Dictionary里
...其他键值类型请自己完善
如果Object非上述类型，则用IL语言将其转换成Dictionary类型，
具体代码如下：
public static Dictionary<string, object> ConvertFromObject(object obj)
{
if (obj is Dictionary<string, object>)
return (Dictionary<string, object>)obj; var nvc = obj as NameValueCollection;
if (nvc != null)
{
Dictionary<string, object> dict = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
foreach (string key in nvc.Keys)
dict.Add( key, nvc[key]);
return dict;
} var hs = obj as Hashtable;
if (hs != null)
{
Dictionary<string, object> dict = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
foreach (string key in hs.Keys.OfType<string>())
dict.Add(key, hs[key]);
return dict;
}
var type = obj.GetType();
lock (dictionaryCache)
{
Func<object, Dictionary<string, object>> getter;
if (dictionaryCache.TryGetValue(type, out getter) == false)
{
getter = CreateDictionaryGenerator(type);
dictionaryCache[type] = getter;
}
var dict = getter(obj);
return dict;
}
}
private static Func<object, Dictionary<string, object>> CreateDictionaryGenerator(Type type)
{
var dm = new DynamicMethod((string.Format("Dictionary{0}", Guid.NewGuid())), typeof(Dictionary<string, object>), new[] { typeof(object) }, type, true);
ILGenerator il = dm.GetILGenerator();
il.DeclareLocal(typeof(Dictionary<string, object>));
il.Emit(OpCodes.Nop);
//Dictionary<string, object> dic = new Dictionary<string, object>();
il.Emit(OpCodes.Newobj, typeof(Dictionary<string, object>).GetConstructor(Type.EmptyTypes));
il.Emit(OpCodes.Stloc_0); foreach (var item in type.GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
string columnName = item.Name;
il.Emit(OpCodes.Nop);
il.Emit(OpCodes.Ldloc_0);
il.Emit(OpCodes.Ldstr, columnName);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Callvirt, item.GetGetMethod());
if (item.PropertyType.IsValueType)
{
il.Emit(OpCodes.Box, item.PropertyType);
}
il.Emit(OpCodes.Callvirt, typeof(Dictionary<string, object>).GetMethod("Add"));
}
il.Emit(OpCodes.Nop); il.Emit(OpCodes.Ldloc_0);
il.Emit(OpCodes.Ret);
var func = (Func<object, Dictionary<string, object>>)dm.CreateDelegate(typeof(Func<object, Dictionary<string, object>>));
return func;
}