public static void RedirectToPage(string destinationPg, HttpContext context, NameValueCollection qsVals)
{
if (context == null)
{
throw new ArgumentNullException("context", "You must pass the current HttpContext object for this method to function.");
}
else if (context.Response == null || context.Request == null)
{
throw new Exception("Specified HttpContext must contain both a valid request and response object.");
}
string redirectUrl = PageRedirect.GetUrlPefix(destinationPg);
System.Text.StringBuilder sb = new System.Text.StringBuilder();
if (qsVals != null)
{
for (int i = 0; i < qsVals.Count; i++)
{
sb.AppendFormat("&{0}={1}", context.Server.UrlEncode(qsVals.Keys[i]), context.Server.UrlEncode(qsVals[i]));
}
}
redirectUrl += "?ReturnUrl=" + PageRedirect.GetCurrentPageEncoded(context) + sb.ToString();
context.Response.Redirect(redirectUrl, true);
}
public static void SendBackToCallingPage(string destinationPg, HttpContext context, NameValueCollection additionalParams, params string[] includedParams)
{
if (context == null)
{
throw new ArgumentNullException("context", "You must pass the current HttpContext object for this method to function.");
}
else if (context.Response == null || context.Request == null)
{
throw new Exception("Specified HttpContext must contain both a valid request and response object.");
}
if (string.IsNullOrEmpty(destinationPg))
{
throw new ArgumentNullException("desinationPg", "You must specify the destination page you want to redirect to.");
}
string responseUrl = PageRedirect.GetUrlPefix(destinationPg);
System.Text.StringBuilder sb = new System.Text.StringBuilder();
if (includedParams.Length > 0)
{
// We're using a delegate to define an 'anonymous' method, since the Array.ConvertAll
// requires that we create a 'Converter' delegate pointed to a method, but this
// saves the overhead of having a 'real' method call for one line of code.
string[] lVals = Array.ConvertAll <string, string>(includedParams, new Converter <string, string>(delegate(string val) { return(val.ToLower()); }));
HttpRequest req = context.Request;
for (int i = 0; i < req.QueryString.Count; i++)
{
if (lVals.Contains(req.QueryString.GetKey(i).ToLower()))
{
sb.AppendFormat("&{0}={1}", context.Server.UrlEncode(req.QueryString.GetKey(i)), context.Server.UrlEncode(req.QueryString.Get(i)));
}
}
}
if (additionalParams != null)
{
for (int i = 0; i < additionalParams.Count; i++)
{
sb.AppendFormat("&{0}={1}", context.Server.UrlEncode(additionalParams.GetKey(i)), context.Server.UrlEncode(additionalParams[i]));
}
}
string qs = sb.ToString();
if (!string.IsNullOrEmpty(qs))
{
responseUrl += "?" + qs.TrimStart('&');
}
context.Response.Redirect(responseUrl);
}
