Usage Of HttpContext.Items Dictionary Object

Feb 1, 2011

When and how do I use the Httpcontext.items dictionary object?

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Can you iterate through a dictionary object that can contain a object and enum types

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do something here...

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Sep 23, 2010

What would be the best way to deserialize this

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Server.TransferRequest Is Not Preserving HttpContext.Items

Sep 13, 2010

I've just updated my ASP.Net code from HttpContext.RewritePath(targetPath) to use the .Net 3.5 function: HttpContext.Server.TransferRequest(targetPath,true)

However, I now no longer have any of the custom HttpContext.Items that I added, before the transfer.

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Web Forms :: Using HttpContext.Current.Items To Store Information?

Oct 27, 2010

I was under the impression that you could use the HttpContext.Current.Items collection to pass information between pages but it doesnt seem to workLets say i have a Page1 ButtonClick, the button click handler stores a value in the collection like so; HttpContext.Current.Items("Test1") = "Test"Then i do Response.Redirect("Page2.aspx").In the Form_Load of Page2, HttpContext.Current.Items("Test1") contains nothing. Why does this not work when its all part of the same postback?This would be perfect, because i wouldnt need to worry about clearing the values between requests because they would automatically get cleared each time the page was posted back.

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Mar 3, 2011

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HttpContext.Current.Items Reused Across Multiple Http Requests?

Jan 27, 2011

I'm using HttpContext.Current.Items to make a Per-Request Cache Store. I'm hitting to many Cache entries over different http requests.

It seems that HttpContext.Current.Items is reused across multiple http requests. Is it normal?

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State Management :: System.Web.HttpContext.Current.Items Not Working?

Jul 21, 2010

In a page (not default) I have:

Protected
Sub Page_Load(ByVal sender
As
Object,
ByVal e
As System.EventArgs)
Handles
Me.Load
Try
loginRep = BusinessLogic.SR.GetUserName("99999")
System.Web.HttpContext.Current.Items.Clear()
System.Web.HttpContext.Current.Items.Add("RepId",loginRep)

I don't any errors and when in the run in the immediate window:

? System.Web.HttpContext.Current.items("RepId") in the immediate window on THAT page I get the OBJECT.

Then I have a hyperlink with navigateurl to the next page "~/ActCnt.aspx"

On that page, ActCnt.aspx, when in the code I have:

Protected
Sub Page_Load(ByVal sender
As
Object,
ByVal e
As System.EventArgs)
Handles
Me.LoadIf
Not Page.IsPostBack
Then
Dim loginRep
As BusinessLogic.SalesRep = System.Web.HttpContext.Current.Items("RepId")

In the immediate window ? System.Web.HttpContext.Current.Items("RepId") returns a String that is equal to "RepId".

Even if I change it to not be an object, but a string I only get the Name "RepId" of the keypair. I have NEVER gotten the actual value.

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C# - How To Use Html Dictionary<string,object> Parameter

Jul 15, 2010

If a html helper takes a idictionary as a parameter, how do I use it?I tried:<%= Html.Blah( new { id = "blah" }) %>

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Web Forms :: Can Bind A DropdownList To A Dictionary Object Directly On The Page

Mar 17, 2011

I've got a Dictionary<string, string> object I'm creating:-

[Code]....

and I wanted to bind this to a dropdownlist. I know this is possible in code-behind, but is it possible to do this directly on the asp: control, something like

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Web Forms :: Dropdownlist.items.findbyValue(value) - Getting Object Reference Not Set To An Instance Of An Object

Jan 13, 2010

I am trying to use

[Code]....

with values I get from a database but I am getting Object reference not set to an instance of an object.

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Dec 30, 2010

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Dec 23, 2010

I have a class that maintains a static dictionary of cached lookup results from my domain controller - users' given names and e-mails.My code looks something like:

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lock(/* something */)
{
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C# - Workaround For HttpContext.HideRequestResponse Being Internal? Detect If HttpContext.Request Is Really Available?

Apr 9, 2010

We're migrating an application to use IIS7 integrated mode. In library code that is designed to work either within the context of an HTTP request or not, we commonly have code like this:

if (HttpContext.Current != null &&
HttpContext.Current.Request != null) {
// do something with HttpContext.Current.Request
} else {
// do equivalent thing without HttpContext..
}

But in IIS7 integrated mode the check for HttpContext.Current.Request throws an exception whenever this code is called from Application_Start.

protected void Application_Start(object sender, EventArgs e)
{
SomeLibrary.DoSomethingWithHttpContextCurrentDetection();
}

Results in:

System.Web.HttpException: Request is not available in this context

How can I detect whether the request is really available without wrapping these calls in an exception handler and taking action based on whether an exception is generated or not.

Looking at HttpContext in Reflector I see it has an internal bool HideRequestResponse field but it's internal so I can only get to it with reflection and that's fragile. Is there a more official/approved way to determine if it's ok to call HttpContext.Request?

This blog post about the subject says not to use HttpContext, but how, in generic library code, can you determine if it's ok to use HttpContext?

http://mvolo.com/blogs/serverside/archive/2007/11/10/Integrated-mode-Request-is-not-available-in-this-context-in-Application_5F00_Start.aspx

I'm using the work-around mentioned there which is to use Application_BeginRequest and an initialized field to only initialize once as part of BeginRequest, but that has to be done in every calling application whereas I'd prefer to make the library code more robust and handle this situation regardless of where it's called from.

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Usage Of "object Sender And EventArgs E"?

Jul 15, 2010

I am a beginner ASP.NET C# developer and have a question about a concept. When I declare a function, I have something generic like:

public void sample_function(object sender, EventArgs e)

{
//function code

}
What I want to know is what does the "object sender and EventArgs e" stand for? How can I use these?

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Feb 26, 2011

public class Package
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}
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C# - Load An XML Document Into Dictionary<string,string> Object?

Apr 29, 2010

I need to load an XML document into my Dictionary<string,string> object.XML looks like:

<nodes>
<node id="123">
<text>text goes here</text>
</node>
</nodes>

How can I do this using XmlDocument?I want readability over performance, and I find XmlReader to be hard to read b/c you have to keep checking the node type.

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DataSource Controls :: Create A Dictionary... Where Can Get Dictionary Database Or World Lists (english To English , English To Hindi?

Mar 5, 2010

I want to create a Dictionary... where i can get Dictionary database or World lists (english to english , english to hindi)

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.net - Add Custom Object To DropDownList Items?

Jul 11, 2010

I'm using DropDownList within my WebApplication. I need to keep additional piece of information with each Item on list. How can I achieve this?

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C# - Reorder Items In DataView Object?

Jan 24, 2010

I have a DataView object with productID and productName,i get all items from Products Table and store them in Cache.I want to get items that user bought in order he bought them without using another query or joining tables. ie.

Products DataView
1. Foo
2. Foo2
3. Foo3

Filtering to ProductsBoughtByUser using RowFilter (productID in (1,3))
UserProducts DataView
1.Foo
3.Foo3

Now user first bought Foo3, how do i reorder items based on correct ( chronological ) Array. ie 3 1

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C# - Add / Remove List Of Items For Single Object

Sep 13, 2010

For my site, I have a list of users and a list of events. I will be assigning users to each event. I have a table named EventUsers to hold this data:

EventUsers
EventID | UserID
1 | 123
1 | 456
2 | 789

On my page, I want to be able to add and remove users for a certain event. I could have a dropdown populated with users and an "Add" button next to it, then when I want to add a user, I pick one and click "Add". There would be a grid below it displaying all the users for the event, with "Delete" buttons for each one. The downside to this is that a database call is made for every Add and Delete.

Another option is to have two listboxes on the page - one on the left containing all users in the database, and another on the right which will contain users for the given event, and I can just add or remove from the list on the right. Then when I'm done, I click save, and it makes one database call. The only issue is that if I'm removing and adding, I'll have to delete every record in my EventUsers table for that event, and then add the changes. I've run into this before, and I've always gone with the dropdown method. What's the preferred method here?

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