//url里有key的值，就替换为value,没有的话就追加.
public static string UrlParam(string url, string ParamText, string ParamValue)
{
Regex reg = new Regex(string.Format("{0}=[^&]*",ParamText),RegexOptions.IgnoreCase);
Regex reg1 = new Regex("[&]{2,}", RegexOptions.IgnoreCase);
string _url = reg.Replace(url, "");
//_url = reg1.Replace(_url, "");
if (_url.IndexOf("?") == -1)
_url += string.Format("?{0}={1}",ParamText,ParamValue);//?
else
_url += string.Format("&{0}={1}", ParamText, ParamValue);//&
_url = reg1.Replace(_url, "&");
_url = _url.Replace("?&", "?");
return _url;
}
/// <summary>
/// 添加URL参数
/// </summary>
public static string AddParam(string url, string paramName, string value)
{
Uri uri = new Uri(url);
if (string.IsNullOrEmpty(uri.Query))
{
string eval = HttpContext.Current.Server.UrlEncode(value);
return String.Concat(url, "?" + paramName + "=" + eval);
}
else
{
string eval = HttpContext.Current.Server.UrlEncode(value);
return String.Concat(url, "&" + paramName + "=" + eval);
}
}
/// <summary>
/// 更新URL参数
/// </summary>
public static string UpdateParam(string url, string paramName, string value)
{
string keyWord = paramName + "=";
int index = url.IndexOf(keyWord) + keyWord.Length;
int index1 = url.IndexOf("&", index);
if (index1 == -1)
{
url = url.Remove(index, url.Length - index);
url = string.Concat(url, value);
return url;
}
url = url.Remove(index, index1 - index);
url = url.Insert(index, value);
return url;
}
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