.net - Suitable Method To Implement Caching In Asp.net?
May 14, 2012
I need to implement caching in Asp.net web application My need to store data with different ID's. So which method is better ?
Use a dictionary variable. Insert the data (key as ID and data as value).
Dim mDict As New Dictionary(Of String, String)
mDict .Add(bID, uwtTree.WriteXmlString(True, True))
Cache.Insert("mTree", mDict)
[Code]....
Which method is the best way ? Or is there any other method exists ? I am using .Net 3.5 /IIS 7 (VB.Net).
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Aug 17, 2010
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.
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Mar 17, 2012
I've already asked this question on several forums, but without any good explanation of why the code above cannot be converted from C# to Visual Basic. The code is actually from this forum, written in C#. (the source)
[Code]...
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Nov 10, 2010
I want to implement an extension method in VB.NET that will clone an object of type T.Say, I want
Dim cust1 as New Customer() //...
Dim cust2 as New Customer() //...
cust2 = cust1.Clone()
[code]....
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Feb 8, 2011
I'd like to implement a common method on most of the forms, but not all.Let's call the method 'FormCleaner'.
I'd like to recursively call each forms FormCleaner method and ignore cases where the form has no such method.[code]...
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Jul 5, 2011
Suppose I have the following construct:
Public Sub SomeMethod()
Try
doSomething()
Catch ex as Exception
[code]...
And I would like to write handleException(ex). Suppose my class has different options of handling events:
Public Enum ExceptionHandlingType
DisplayInMessageBox 'Display in msgbox
ThrowToCaller 'Raise the error to the caller routine
[code]...
Below is my attempt at writing "handleException". It seems no matter what I do, if the object was set with Exception mode of "ThrowToCaller" then the stack trace gets all messed up when I use handleException(). How can I just have a clean stack trace generated when the option is "ThrowToCaller" (every other option seems like it is working fine)
Public Sub handleException(ex as Exception)
Select Case mExceptionHandling
Case ExceptionHandlingType.DisplayInMessageBox
MsgBox(ex.Message)
[code]...
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Jan 13, 2012
I have the following
Private Structure FadeLabel
Dim Alpha As Byte
Dim Color As Color
[CODE]...
Which I picked up from this thread: [URL]
What I'd like to do is 'implement' the BringToFront method so that when I use the 'FadeLabel' structure I can also call it's method 'BringToFront'.
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Mar 15, 2008
I'm binding a DataGridView to a BindingSource to a LINQ IEnumerable, I found that the BindingSource.Find method throws an exception because .Find isn't implemented in IEnumerable (and the BindingSource just passes the call to it's DataSource). I need to use BindingSource.Find to select/highlight a particular row in the DataGridView.
Is there a feasable way to extend my DataContext to support this behavior w/o breaking anything else? I expected to find the code out there already, but I've searched exaustively with no luck.Without it, I cannot "move" the BindingSource using .Position and that's a pretty common use of the BindingSource I think.
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Aug 3, 2011
What is the suitable type for these 3 syntax in vb.net? i can't find in this page url..I've tried to convert the first one to -->byval ID() as byte is not working
1. unsigned char *ID
2. unsigned short*Count,
3.unsigned long*Minute
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Jun 16, 2011
what version of devexpress is more subtable for vb.net 2008?
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Dec 6, 2010
I have created the user control which has two predefined components namely:
1.TextBox(which is used for searching name of items)
2.DatagridView(used for displaying name of item which are similar to text enetred in TextBox)
When we drop this usercontrol on any form then the code which written during creation of user control must be automatically created behind the form and which must be modificial...
I have used VB.NET 2008 and SQL server 2005.
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Aug 6, 2008
I have a GridView and some textboxes, etc whose BindingSource is a list of business objects.
Problem comes when my business objects are updated programmatically. My objects implement INotifyPropertyChanged, and I raise the PropertyChanged event when the object is updated. When the object changed happens to be the selected row in the GridView.
I get the following exception: System.InvalidOperationException
DataBinding cannot find a row in the list that is suitable for all bindings.
How can I solve this?
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Mar 24, 2010
I use VB in Visual Studio 2008 Pro. I've created a few solutions using the Crystal Reports tools. I found them easy to work with & easy to do things, (export to different formats, refresh reports, write an automated service that ran & saved reports, etc...)Is CR in VB 2010? If so - which version of VS 2010 do you need to buy to get it?OR - is the reporting services in VS a suitable replacement? Is there a viewer / preview like the CR tools? Can you create a standalone app to refresh reports & export them to different formats? Which version of VS 2010 would I need to purchase to get these?At home - I use Win 7 media centre (a fantastic piece of software). Are there any development 'goodies' in Visual Basic 2010 for Win 7 Media Centre?
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May 19, 2009
Code as follows:
[Code]...
it's telling me that I cannot show the DateTimePicker1 value in the label because the types are different. How do I tell the label to convert the date format for display? I've tried .string() but it didn't like that.
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Dec 21, 2011
I want when I create a node in a tree View object could enable a button and when remove all of the nodes disable my button again.How can I do this and which event is suitable for this work.
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Oct 26, 2008
I am trying to find a suitable way to convert any word from any language to I2OF5 Barcode.In most basic terms, what I am thinking is constructing a numerical representation of a word by making use of ASCW function and I am planning to do that by a single pass through the variable that holds the word. Maybe I will use the first two digits for language ID and maybe the last two digits for storing the string length information in order to reduce the possibility of collisions that may appear.
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Apr 17, 2011
I am developing a iimage veiwer.
1. i need to resize the form to a suitable size depending upon the heght and width of my image
2. their are two buttons one should always be at the bottom right corner and other always at the top right corner.
3. How do i make the picture fade in.
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Sep 16, 2010
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?
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Jan 8, 2010
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]...
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Jul 27, 2009
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.
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Jul 5, 2010
Is there a way to disable asp.net caching on selected page. It would be nice if this can be done from the web.config.
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Feb 24, 2011
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
context.Response.Clear()
context.Response.ClearHeaders()
context.Response.ClearContent()
[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.
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Jan 19, 2012
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)
[Code]....
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Aug 6, 2010
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.
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Mar 19, 2012
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.
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Sep 29, 2010
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.
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Nov 19, 2011
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?
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Oct 5, 2009
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?
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Feb 27, 2009
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
[code]....
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Oct 19, 2010
Consider a MyForm class that contains a shadowed implementation of Show(). It also contains a CreateForm() method, which accepts an instance of the form and calls the shadowed sub:
[Code]....
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