I'm not sure I wrote the headline right, but I've got a service that holds a password in memory. It's notification thing, and so will be running 24/7 ideally.
It uses a password to some other resources that I send to it at startup in a UPD packet.
I'd like to find a way to instruct windows never to stick that value in the disk cache so if the worst happened, the theoretical bad guy couldn't pick apart the cache and find the password.
I've tried applying several suggestions found on the web, but still experiencing cached results when querying CRM 2011 with linq. My web.config reads as follows, which is supposed to disable result caching:[code]I can live with that, but it would be nicer, instead of recreating the context, to have a way of ensuring no caching either in code or in web.config.
I'm using interop.msxml2.dll to open XML and txt files off an Internet server. The response that is received from the server is stored in my application's variables. I've recently noticed that the application doesn't always update the information when it goes to download a file that it has already downloaded in the past. For example, if it downloaded a file off the server when it started up, then when it attempted to download the new, changed file 5 minutes later, it would still return the same value as the first one. Even after closing the application, it would still return the incorrect, older value. How to stop this "caching" of data, and only allow the program to download the latest file off the server.
I currently have a control that called MyGridview that inherits Gridview. It has a paging template within it for customized paging options, and I'm at the point where I want to cache the initial datasource for better performance.I haven't done this in a long time, so perhaps there is a different solution these days with the newer frameworks.Before, I simply used a Cache object that was named whatever the gridview was named. I couldn't use the same gridview name through the application though.Is there a best way to have a cache object, or some other object like a session within the control to store those unique datasets for paging and sorting?
I'm pulling data from a Lotus Notes database, this works fine but when I change the data and pull it again, it doesn't take the changes, a restart solves this so it must be getting cached somewhere, how do I prevent it?[code]...
Is it possible to cache dataset which is accessible globally.Example: One windows service creates a dataset and caches it.Another Web Application and Windows application references that cache and populates in datagrid.
I'm having a http handler that is retrieving images from the file system on the server. I need to cache these images on the client side(browser). For that thing i'm doing the following code
The thing happening with this is ... When i switch between the tabs its taking it from the cache... but when i hit the browsers refresh button its again going to the file system on the server. how to cache these images on the client side.
P.S: Cant do markup caching for all the pages im my application.
I've been playing around with implementing an abstract base class that using reflection accomplishes SQL to Object mapping.
I did some benchmarks and decided I wanted to implement a caching strategy for the property info of the objects (to prevent future lookups on them). My first instinct was to try and implement something like this.
Public MustInherit Class BaseModel Implements IFillable Private Shared PropertyCache As List(Of PropertyInfo)
I have been googling for hours and trying to figure this out, and I just can't.I have 1 webbrowser control on a form, webbrowser1. Once I load a page, say google.com, if I use webbrowser1.refresh() or webbrowser1.navigate("google.com"), it's not reloading the page, it has it cached so it's just reloading the cache. This is terribly apparent especially on pages like forums or craigslist.
I'm making a webbrowser for the pc's on my school, but I want to clear cache & clear cookies everythime someone exit's the webbrowser. Is there a simple code for it?
A quick question on caching dataset objects. How can I know if the data is changed in Sql when caching data? I don't want to specify time constraints but used a strategy where data is changed in sql and I have to refresh my cache?
We have data that's updated nightly in a database residing in the same instance as my app's database. So to save on database calls, I want to cache this static-for-the-day data into a List(Of MyObject). From a theory point of view, should this cached List(Of ) be cached in the presentation layer code, via a global variable? Should it be in a global variable in the .DLL?I'm thinking in the .DLL, because I created a service layer, which is exposed publicly to the GUI and makes calls to the data access layer inside the .DLL:
Public Shared Function Search(ByVal criteria As Core.Other.Customer) As List(Of Core.Other.Customer) ' TODO: Check the customer cache to see if it has been populated yet. If not, populate it. If 1 = 1 Then
I am trying to implement image caching for a web application and I found some code on the Internet that implements an HttpHandler that does this. The code was in C# and since my web app is written in VB, I decided to convert the code to VB. I managed to convert everything except the following code (in bold):
public class FileExtensionCollection : ConfigurationElementCollection { public override ConfigurationElementCollectionType CollectionType {
[CODE]...
From what I can understand, the two properties above provide a way to access the FileExtension collection either using an integer or a string index. My problem is that I do not know how to convert this in VB.
Have experience with web scripting languages and SQL but am still getting used to VB.Currently using VS2008 to create a simple app in VB 2008 that uses a WebBrowser control. The user navigates to a web page, hits a button, and then every minute the web browser automatically refreshes, gets the page length, and alerts if the page length has changed by more than 100 chars.Unfortunately, I am noticing that VB uses the cached version of the page when it refreshes (I am using WebBrowser.Refresh, but have also tried using WebBrowser.Navigate(same page as before)). Is there any way that I can delete just that page in the cache without clearing the whole thing from my application before it reloads and calculates the new page length?
I'm using a technique similar to Rick Strahls example, but have notcied using google's speed tracer that
Resource Caching : @10.88s - The following resources specify a "Vary" header that disables caching in most versions of Internet Explorer. Fix or remove the "Vary" header for the following resources:The question is Which versions of internet explorer? If I include a way of only outputting Vary for all browsers except early version of internet explorer, will this get resolved?
I am developing a windows forms smart client that uses Fluent Nhibernate 1.1 and NHibernate 3.0 for persistence. Due to legacy code I have had no option but to create a single session that handles all client level CRUD operations. This tends to leave the Nhibernate session in a stale state. So I have made the decision to use QueryOver to eliminate this stale data issue, as I was under the impression that query results were not cached. This doesn't seem to be the happening as the results returned from NHibernate seem to be cached. My question is does the default implementation of QueryOver use some sort of caching when the results are returned?
- I'm working on a windows forms application (.NET 4.0). - My form contains a 'Fast Line' chart using the Microsoft chart control included in VS2010. - The chart gets filled with about 20,000 datapoints. - My application then starts receiving market data from a server via DDE (Dynamic Data Exchange) in real-time and adds it the chart.
Note: I have no control over the server and so I have to deal with DDE only even though it's an outdated technology. VS doesn't support DDE anymore and so I use the Ndde library which works like a charm.
Private Sub StartDDE() 'first we connect to the DDE server: Dim client As DdeClient = New DdeClient("ServerApplication", "Bid")
Basicly I'm downloading XML files with the Webclient class for processing and caching in a local database. There are three different categories of data, each contains 1 to n numbers of XML files. To retrieve the XML file I ask the server with following parameters in the URL:
I am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this
Imports System.Data.SqlClient Imports System.Linq Public Class Form1
[code]....
I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.
I'm interested in Windows performance especially the number of disk reads and writes per second. Windows knows for performance data. Does anyone know have to collect this data programatically?
How would I find the letter for the hard disk? e.g C:
Because I know some computers have different letters insetad of C.
Also, on a slightly different topic (I didnt think it was worth starting a new thread for it), I need a program to start during the start up of the computer it is on, am I right in saying I need to create a shortcut (which I think is a .lnk file?) and then put that in the startup folder. I'm doing this in code, but I was wondering what information I need in the shortcut file.
I am using the following code to get the Disk I/O on various servers. For now I am just retrieving the DiskReadsPerSec to get a feel for it. The return data gives a uint32 for each drive on the server and a total. My questions is what is the time frame that this represents? Is this at the second that my code polls the drive or is this over the last few seconds or do I need to do multiple runs to get an average.
My intention is to build a graph for each drive so I wonder how often I need to poll the drive to get a acurate value.
Public Shared Function GetDriveIO(ByVal strip As String) As Boolean Dim oConn As New ConnectionOptions() Dim lnglist As New List(Of Long)
I want to do low level disk I/O using Visual Basic 2008.Particularly, I want to do track/sector read/writes to a disk (or equivalent hardware)Also important is to discover number of tracks/sectors available.
namespace of "system.runtime.caching" does not exist but in object explorer and microsof exist.i use microsoft visual studio 2010 and .net framework 4.0.i also cant use this name space(System.IO.MemoryMappedFiles & System.Runtime.Caching.MemoryCache)
any body know what is the problem. i want my program after doing something (opening a file or any thing that can do something my program use more memory.)use memory like startup run.
I am trying to get the HDD Disk Drive information from the DeviceIOControl(,,,,,) function with IOCTL_DISK_GET_DRIVE_LAYOUT_EX control code.
Here are the problems :
1. The DeviceIOControl function returns(as from output buffer) DRIVE_LAYOUT_INFORMATION_EX structure. Which contains some data types i am unable to get. I used. Uint32 instead of Dword. Long instead of Large_Integer.
2. DRIVE_LAYOUT_INFORMATION_EX structure contains a union declaration as mentioned on MSDN , HOW TO GET A UNION in VB.NET or vb 6.
3. Still when i tried declaring the data types as mentioned earlier gives an error (Value does not fall within the expected range.) executing the DeviceIOControl Method.
I am trying to calculate the total size on disk of all files in a directory. However, it does not appear to be working.
Here is my code behind:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim dInfo As New DirectoryInfo("C:WebsitesHKM3TempUpload")
