c# model对象转换为url的参数形式

using System.Web;
using System.Reflection;
/// <summary>
/// Model对象转换为uri网址参数形式
/// </summary>
/// <param name="obj">Model对象</param>
/// <param name="url">前部分网址</param>
/// <returns></returns>
public static string ModelToUriParam(this object obj, string url = "")
{
PropertyInfo[] propertis = obj.GetType().GetProperties();
StringBuilder sb = new StringBuilder();
sb.Append(url);
sb.Append("?");
foreach(var p in propertis)
{
var v = p.GetValue(obj, null);
if (v == null)
continue;

sb.Append(p.Name);
sb.Append("=");
sb.Append(HttpUtility.UrlEncode(v.ToString()));
sb.Append("&");
}
sb.Remove(sb.Length - 1, 1);

return sb.ToString();
}