C# .net 接口接收不同类型参数

public ActionResult ccbwx_notifyurl()
{

#region 请求参数
Hashtable has = new Hashtable();
System.Collections.Specialized.NameValueCollection collection;
//if (this.HttpContext.Request.HttpMethod.ToUpper() == “POST”)
//{
collection = this.HttpContext.Request.Form;
foreach (string k in collection)
{
string v = (string)collection[k];
if(!has.ContainsKey(k))
{
has.Add(k, v);
}

}
//}

collection = this.HttpContext.Request.QueryString;
foreach (string k in collection)
{
string v = (string)collection[k];
if (!has.ContainsKey(k))
{
has.Add(k, v);
}
}
try
{
if (this.HttpContext.Request.InputStream.Length > 0)
{
#region body=raw、binary
try
{

Int32 strLen, strRead;
System.IO.Stream str = Request.InputStream;
strLen = Convert.ToInt32(str.Length);
byte[] strArr = new byte[strLen];
strRead = str.Read(strArr, 0, strLen);

String strmContents = System.Text.Encoding.UTF8.GetString(strArr);
//strmContents = System.Text.Encoding.ASCII.GetString(strArr);
//strmContents = System.Text.Encoding.Default.GetString(strArr);
Dictionary dir = JsonConvert.DeserializeObject<Dictionary>(strmContents);
foreach (KeyValuePair dv in dir)
{
if (!has.ContainsKey(dv.Key))
{
has.Add(dv.Key, dv.Value);
}
}
}
catch { }
#endregion

#region
try
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(this.HttpContext.Request.InputStream);
XmlNode root = xmlDoc.SelectSingleNode(“xml”);
XmlNodeList xnl = root.ChildNodes;

foreach (XmlNode xnf in xnl)
{
if (!has.ContainsKey(xnf.Name))
has.Add(xnf.Name, xnf.InnerText);
}
}
catch { }
#endregion
}
}
catch (Exception ex)
{

}

#endregion

return Content(“success”);

}