/// <summary>
/// 创建md5摘要,规则是:按参数名称a-z排序,遇到空值的参数不参加签名
/// </summary>
/// <param name="key">参数名</param>
/// <param name="value">参数值</param>
/// key和value通常用于填充最后一组参数
/// <returns></returns>
public virtual string CreateMd5Sign(string key, string value)
{
StringBuilder sb = new StringBuilder();
ArrayList akeys = new ArrayList(Parameters.Keys);
akeys.Sort();
foreach (string k in akeys)
{
string v = (string)Parameters[k];
if (null != v && "".CompareTo(v) != 0 &&
"sign".CompareTo(k) != 0 && "key".CompareTo(k) != 0)
{
sb.Append(k + "=" + v + "&");
}
}
sb.Append(key + "=" + value);
string sign = MD5Util.GetMD5(sb.ToString(), GetCharset()).ToUpper();
return(sign);
}