i googled many samples, all show such code
Server.Transfer("/default.asp?p=news")
but i get error -An invalid character was specified in the Path parameter for the MapPath method.
can you help me?
Server.Transfer method actually doesn't support any kind of querystring specified in the path. You can try to store the query parameter in a session value instead.
Some discussions:
http://classicasp.aspfaq.com/general/why-won-t-querystring-values-work-with-server-execute/server-transfer.html
The following might be a work around to using server.transfer or response.redirect.
Response.Write "<script language=javascript>window.location.href = '/default.asp?p=news';</script>"
You would have to include your querystring on the page that does the server transfer.
Ie:
page.asp?p=news would include:
Server.Transfer("default.asp")
default.asp would include:
sParam = Request("p") '<-- Your querystring value from page.asp
This should work, or if your app isn't flexible to do this, you can use Session to pass the value. It says here which methods are allowed for passing variables using Server.Transfer: http://msdn.microsoft.com/en-us/library/ms525800%28v=vs.90%29.aspx
Related
I have a page "Demo.aspx". I need to set some parameters using post method and redirect the page to "DemoTest.aspx".
Is there any way to set parameters in post method in asp.net? I don't want to set "Querystring" due to security propose.
Also I need server side code for this. I am not able to use "Javascript" or "Jquery" for the same.
Here is some more description for the same.
Right now I am using Response.Redirect("www.ABC.Com/DemoTest.aspx?P1=2"). So the page is simply redirect to the given URL.
Now I don't want to pass that "P1" in "Querystring". Instead of query string I want to use Post method.
Please note that redirection page is not in my own application. So I cant maintain session or "Viewstate".
Thanks in advance.
Use a session variable and response.redirect to the next page.
Session["MyVariable"] = "someThing";
Response.Redirect("DemoTest.aspx");
The value stored in Session variables will be accessible across application.
you can store in session like this :
Session["id"] = "anyID";
To get values On another page you need to write
string id = Convert.ToString(Session["Id"]);
However
By default, in .NET pages post() do the things automatically.
You will need to do sumthing like this:
Server.Transfer("DemoTest.aspx", True)
Can anybody tell me how to pass a value from one web form to another web form without using a query string and session?
You can pass the Values over different pages via QueryString like:
Response.Redirect("yourNextpage.aspx?identifier=DesiredValue");
On your next page you can retrieve the value like this:
Request.QueryString["identifier"];
Other Preferred way would be Server.Transer() and Postbackurl.
Refer this link for various possible ways.
there are several ways you can pass parameters between pages.
Using a Query String
Getting Post Information from the Source Page
Using Session State
Getting Public Property Values from the Source Page
Getting Control Information from the Source Page in the Same Application
for more detail visit followng link.
http://msdn.microsoft.com/en-us/library/6c3yckfw.aspx
You could use a Querystring in this case:
Page.Response.Redirect("show.aspx?id=1");
And then read it on the other end:
int id = Page.Request.QueryString["id"];
Using PostBackURL, ex:
PostBackUrl="~/result.aspx"
and on result.cs (Page Load)
lblEmployeeNumber.Text = HttpContext.Current.Request.Form["txtEmployeeNumber"];
With Session:
For example you login the system and your id is 123123123.
string userid = 123123123;
Session["userid"] = userid;
When you go another page/pages your session is alive when your session timeout.
<system.web>
<sessionState timeout="1250"/>
</system.web>
It seems what you're looking for is something like the flash-, view- or conversation scope in Java EE and Ruby on Rails.
For ASP.NET you could perhaps take a look at this one: Is there an equivalent of JSF #ViewScope in ASP MVC?
depends on type and how much information you wish to transfer. for instance, if you want to transfer some variable (strings or integer values) you consider to use querystring (you can found here major information). for instance, if you want to transfer typed objects (class instance) you consider to use session (you can found here major information).
I have an httpModule that allows me to have custom urls, but direct the url to a specified page with additional query string info.
Let's say I use context.RewritePath to rewrite "Custom/Path" to a "/Path.aspx?queryKey=value"
When I try to recieve the "queryKey" query parameter, it doesn't exist because the Request.Path is still "Custom/Path".
How do I get the Request.Path to be "/Path.aspx?queryKey=value" so that I can get query string info?
You could use "../Path.aspx?queryKey=value", if you need to go back one directory.
Also, you would probably want to add a false for the rebaseClientPath option.
Say in my 'Page_init()' of "a.aspx" i just have 'server.transferrequest("b.aspx").
This works great, displays the content for "b.aspx" and the browserurl still stays at "a.aspx".
Happy days.
However does anyone know how to see this url from my "b.aspx" (the resulting page)?.
The usual request.rawurl and request.url.absoluteuri both return the current page as "b.aspx".
Server.TransferRequest performs an asynchronous execution of the specified URL. This means that your client has no clue of was is going on at the server so from your client perspective it's the same page.
If you need to change the actual page (which is the most common) then use Response.Redirect.
Maybe before you do the transfer you could save the information you need somewhere, then retrieve it when it's needed again.
You can use PreviousPage to get source page that makes server transfer :
string previousPagesUrl = PreviousPage.Request.RawUrl;
EDIT : #maxp, as an answer to your comment, PreviousPage only works for Server.Transfer and cross page postback.
You'll get null for PreviousPage if :
the source page redirects to the destination page.
a link at source page forwards the page to destination page.
NameValueCollection headers = new NameValueCollection();
headers["RawUrl"] = HttpContext.Current.Request.RawUrl;
Server.TransferRequest("b.aspx", true, null, headers);
And then use Headers["RawUrl"] in b.aspx.
Have you tried this method:
public void Transfer(string path, bool preserveForm )
http://msdn.microsoft.com/en-us/library/caxa892w.aspx
I currently got in the same problem, and I found out that Server object has this parameter on transfer method that gives you the posibility to preserve the original request form or not.
In ASP.NET, is there any way to get the real raw URL?
For example, if a user browse to "http://example.com/mypage.aspx/%2F", I would like to be able to get "http://example.com/mypage.aspx/%2F" rather than "http://example.com/mypage.aspx//".
I would of course like a clean way to do it, but I can live with a hacky approach using reflection or accessing obscure properties.
At the moment, I try to use the uri in the Authorization-header (which works), but I cannot rely on that always being there.
EDIT:
What I really want to do is to be able to distinguish between "http://example.com/mypage.aspx/%2F" and "http://example.com/mypage.aspx/%2F%2F".
It looks like ASP.NET first converts "%2F%2F" into "//" and then converts the slashes into a single slash.
So just re-encoding it is not going to work.
I wasn't able to test this because it only works in IIS and not the ASP.NET Development Server that is part of Visual Studio, but try:
Request.ServerVariables[ "HTTP_URL" ]
The following code works for me:
IServiceProvider serviceProvider = (IServiceProvider)HttpContext.Current;
HttpWorkerRequest workerRequest = (HttpWorkerRequest)serviceProvider.GetService(typeof(HttpWorkerRequest));
string realUrl = workerRequest.GetServerVariable("HTTP_URL");
Note that this only works when running on the IIS and not under f.x. ASP.NET Development Server!
Thanks to Lucero for the answer in another thread and Zhaph for pointing me to the thread.
See also:
Get the exact url the user typed into the browser
Server.HtmlEncode(Request.RawUrl);
The raw URL is defined as the part of the URL following the domain information. In the URL string http://www.contoso.com/articles/recent.aspx, the raw URL is /articles/recent.aspx. The raw URL includes the query string, if present.
see also:link text
I can't test here, but this might be what you need:
Request.Url.AbsoluteUri
Request.RawUrl will return the application relative path(including querystring info) while Request.Url will return the complete path(including querystring info).
For more information, see "Making sense of ASP.NET paths".
Well, you could just encode it back to the url-encoded version.
Get the url from the request and urlencode only the query string part and then concatenate them