I have a page that redirects to another page (within the same application) via Server.Transfer. I need to do this because the original page has an object that I need to access by using the Page.PreviousPage property
View 1 RepliesFor my application, I have a page that redirects to another page (within the same application) via Server.Transfer. I need to do this because the original page has an object that I need to access by using the Page.PreviousPage property.
Once my "destination" page has been fully loaded, a local deep clone that I made of the source page's object is suddenly released from memory once I perform a postback? Is this by design--something to do with the Server.Transfer?
Page1.aspx:
Public Structure myCustomObject
Implements ICloneable
Dim someField as String = "default value" ' Default value
[code]....
At this point, EVERYTHING works as it should. Stuff got cloned over correctly and all is well.(Let's say this is on a button click event) Debug.Write(newObj.someField) ' Output: "default value"<- This is NOT "changed value from source page" for some reason when it was working literally a few lines ago! My guess is that the Server.Transfer stops any association with the source page after the new page loads.
I am trying to fix an ASP.NET application that is also written is VB and uses session variables to store the information from the logging page. In Firefox, the application runs just fine, but in IE (I am using IE 8), when I summit the logging credentials, the session variables become empty (takes me back to the logging pageThe weird thing is that when I move the privacy settings in IE (doesn't matter if high to low, or low to high) and enter the logging information again, the runs great. Also if I restart IIS 6.0 the application runs great. What's going on?
View 5 RepliesI'm trying to use classes more in my programs. I'm using classes. This is the section of the main form that is causing the problem:
If conType = Nothing Then
TaOrIbt()
End If
objGetECaptureType.CaptureType(conType)
[CODE]...
I will use the Background Intelligent Transfer Service (BITS) to transfer files from a client (laptop) to a shared folder on a server within our local network.The problem is a very slow network bandwith, if we transfer a file, the other clients canīt work, all requests to other clients (application) or viewing internet pages needs a long time.My idea is to use BITS in my tool to copy/transfer a file from client to server, also I hope to get more performance for the internet requests.
View 2 RepliesI'm using server.transfer to transfer execution of a URL to a dummy page which fetches information from the database. The trouble is that the master page interacts with the session.
global.asax:
Sub Application_BeginRequest(ByVal sender As Object, ByVal e As EventArgs)
' Fires at the beginning of each request
If Not (System.IO.File.Exists(Server.MapPath(Request.Url.LocalPath))) And Request.Url.LocalPath.ToLower
[CODE]...
Master page:
If String.IsNullOrEmpty(CStr(Session("SessionId"))) Then
Session.Add("SessionId", Guid.NewGuid().ToString)
End If
Page declaration: <%@ Page Language="vb" AutoEventWireup="false" CodeBehind="utilityCMS.aspx.vb" Inherits="utilityCMS" MasterPageFile="~/MasterPages/main.master" EnableSessionState="True" %>
Web.config snippet:
<httpModules>
<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add name="HttpModuleAggregator" type="XPIdea.Web.HttpModuleAggregator,xpidea.web.common" />
</httpModules>
I'm getting an error :
Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the <configuration><system.web><httpModules> section in the application configuration.
I should also mention that this same master page works elsewhere in the site. Session is used throughout the site as well (not just in the master page).
I'm sort of new to the vb 2008, and I would like to be able to send a file to another computer and save it on the local drive. Doesn't have to be in any certain folder, but just on the c drive. I know for the old visual basic you would use winsock for this, but in 2008, they have removed it. What and how will I do this. There will be no program on the user's computer. This is done all from one computer sending to another with no program listening on it. This computer is on my network with network sharing, so I can just do like a \computernameorIPaddress and open send the file that way.
View 2 RepliesIn my scenario, users are able to upload zip files to a.[url]....I would love to create a "daemon" which in specified time intervals will move-transfer any zip files uploaded by the users from a[url].....From the info i gathered so far,
The daemon will be an .ashx generic handler.
The daemon will be triggered at the specified time intervals via a plesk cron job
The daemon (thanks to SLaks) will consist of two FtpWebRequest's (One for reading and one for writing).
how could i implement step 3?
Do i have to read into to a memory() array the whole file and try to write that in b.example.com ?
How could i write the info i read to b[url].....?
Could i perform reading and writing of the file at the same time? No i am not asking for the full code, i just can figure out, how could i perform reading and writing on the fly, without user interaction.I mean i could download the file locally from a.example.com and upload it at b.example.com but that is not the point.
When you declare a local variable (inside a method), is it automatically disposed when the method ends? Or should I still use variable.Dispose() ?
View 16 RepliesI am using a lot of variables in my code and like to have them listed or printed. How can I do that?
View 3 RepliesI am a Visual Basic 2008 user (under Visual Studio 2008) and I have numerous local variables in my project. How can I list them to a file or to a printer?
View 2 RepliesIs it possible to get the name of a local variable from a reference to the variable? For example, I can get the names and values of a calling function's parameters like this:
Dim frame As New StackFrame(1)
Dim pInfos() As ParameterInfo = frame.GetMethod().GetParameters()
Is there some way to get the same information for a calling function's local variables? This is kind of what I have in mind:
Sub SomeSub()
Dim count As Integer = 10
Dim average As Single = 45.67
[Code]......
I want to know how you can export data from a disconnected database that could be access or ms sql to an sql server database.
Here is the scenario:
I have several software in a remote sites on either sql or ms access databases as back-ends...and I have another sql server database that i want to consolidate data from the remote sites.
One solution I have been thinking about is to use email to send incremental backups of the databases to the main database using a separate piece of software and have another one on the main server to pull that data into the database.
Basically am looking at setting up the remote databases as linked servers at the main database and then having incremental backups sent by email to the main database.
I have thought of replication but the internet link at the sites is terrible.
Is that a good implementation? If yes
How do i get to send the incremental backups and get them imported?(the code)
Tools:
Visual basic 2008 standard edition..Net 3.5
SQL Server 2005.
32 bit architecture.
I was reviewing the MSDN documentation on VB.Net's little-used Static keyword for local variables. My question is not about how Static works (I personally plan to avoid using it as it seems like it could cause grief to future programmers who don't notice the side-effects.) My question is about this statement in the docs:[code]So can anyone interpret the above statement for me in a way that makes sense? Or is this a bug in the documentation? It's been there since the VS 2005 version of the docs and is still present in the Visual Studio 11 version.
View 2 RepliesI am wondering if you have a class and in the class you have a function which executes a sqlcommand. Which would u use ? the local variable declaration or the private member command variable.Assuming that the class has a private field called m_Cmd as OracleCommand..i am using oracle db so i use oraclecommand , if sql server then it should be sqlCommand.[code]
View 3 Replieswhen an exception occures, I want to save the data available on the stack and log it. how can I serialize all the available local variables and save them?
View 1 RepliesWhen I want to maintain code readability and keep things neat. I would create temp variables . Below is one of my functions that uses it. Is it a bad practice? I would create temp variables cost more memory ?
Private sub test(byref transac as transaction , byref txntime as string )
Dim cmd as OracleCommand = nothing
Dim Adapter As OracleDataAdapter = nothing
Dim SQLStr As New StringBuilder
[Code] .....
I came across a number of new Private Shared variables (of type Hashtables(Of String), initialized in the declaration) added to a partial class for a very large (DataContext-derived) class. This seems sensible to me in one sense because they never change, and making these shared variables ensures that they won't get re-initialized every time a function is called. However, these variables are only used within the scope of one function in the class, and I fear the private namespace of this DataContext-derived class is getting rather polluted, and having these sorts of things exposed at such a high level might be confusing to others reading the code in the future.
Would there be negative performance impact to making these local variables within the function where they are used, or is there some better way to handle this? Basically we are using these 3 hashtables to determine whether anything within particular subsets of properties changed (using GetModifiedMembers and then using the Overlaps function of the hashset to see if any of the modified members correspond to members we care about).
Edit: I caved and took the time to write my own test program, which confirmed that there is a cost to using local variables (which I assume applies generally to all cases -- I doubt there's any case where a shared variable would be slower unless using the shared variable requires some additional logic to do so properly): [Code]
So in this particular case, using the local variable costs about 200%. But in most cases (including my own), the time is probably negligible compared to the overall task. So I guess the question now becomes, how do people generally feel about improving code maintainability at the cost of negligible but known performance impacts?
I as part of the support VB code for a larger ASP project, I need to read back the existing data from an Access database, to see if user has changed a value.
I'm reading the existing data back into a DataView using the following function:
Public Shared Function GetPolicyStatus(ByVal intPolicyID As Integer) As DataView
Dim strConString As String
Dim conMyData As OleDbConnection
[Code]....
I just recently learned about the uses of static local variables in VB.NET and wondered about it's potential use in lazy loading properties.
Consider the following example code.
Public Class Foo
Implements IFoo
End Class
[Code].....
As far as i can see, this has a few advantages over the usual implementation, primary your inability to access the variable outside of the property, as well as not having to use an additional variable.
My question to you is: Which of those is the "right" way to do it? I know that static variables have additional overhead, but is it bad enough to create, in my personal opinion, unclearer code that can be misused easier? How much performance do you lose compared to the "traditional" method? How does it matter for small classes compared to huge factories?
I need to get data from reports fields to open others windows forms or other reports, How I can get the values of reports fields to pass to local C# o VB.net variables? After many time ... With this upgrade making click on any Textobject on the Report the ClickPage event fire and in that sub is possible to get the Textobject data. You have to upgrade to Crystal Report 2008 SP 3.6, Link below [URL]
Private Sub crViewer_ClickPage(ByVal sender As Object, ByVal e As CrystalDecisions.Windows.Forms.PageMouseEventArgs) Handles crViewer.ClickPage
If Not IsNothing(e.ObjectInfo.Text) Then
Clipboard.Clear()
Clipboard.SetText(e.ObjectInfo.Text)
Me.CallBackForm(e.ObjectInfo.Name.ToUpper.Trim, e.ObjectInfo.Text)
End If
End Sub
Will the list in this shared method keep its state throughout the life of the method? Or will a new list be created every time this method is called?
[Code]...
Im trying to build an error-logger that loggs running values that is active in the function that caused the error. (just for fun so its not a critical problem)When going in break-mode and looking at the locals-tab and autos-tab you can see all active variables (name, type and value), it would be useful to get hold of that for logging purposes when an error occur and on some other occasions.For my example, I just want to find all local variables that are of type string and integer and store the name and value of them.
View 1 RepliesI am trying to make a copy of an existing database, I use .net framework data provider for SQL Server.I get error "Unable to connect to source server for Transfer" when it runs to oPackage.Execute().
oConnection = oPackage.Connections.New("what the providerID should be?")
oStep = oPackage.Steps.New
oTask = oPackage.Tasks.New("DTSTransferObjectsTask")[code]......
I moved my web application to a server and im getting this error below, but on my localhost it works great. Im finding that the error has to have something to do with the dataset not pulling back any data, when I do a for each statement. But the weird thing is that I do a for each statement on another page and it works fine. Here is my for each statement, that im assuming doesnt work. The reason im assuming it b/c when i test it on local it works fine:
Dim retObj As New ClassLibrary1.sql_class
For Each row As DataRow In retObj.sel_all_email_list(company).tables(0).rows
email += row("EMAIL_ADDRESS") & "/"
Next
[code]....
Error:Exception Details: System.IndexOutOfRangeException: Cannot find table 0.
I am trying to use an Asynchronous HTTPListener to create a simple web server in VB .Net (Not ASP) This will be run as a desktop application. My only goal is to be able to request Server Variables from the client. Is there any way to do this from within a HTTPListenerWebServer? I am using the code from the MSDN VB .Net Samples:
[Code]...
I created two forms in asp.net, there are test1.aspx and test2.aspx. The test1 page contains one submit button. If the user clicks this, I do transfer to the test2 page by using server.transfer method. In this situation, the browser will show the test2 page content but the address bar of the browser will show the test1 page location. When the user clicks the refresh button of the browser or F5, the test1 page is worked and the submit button is worked. I don't want to work this. I want to refresh the test2 page. How could I do that? I don't want to use response.redirect.
View 2 Repliesi am creating a software that needs to transfer data between client and server. i m storing the data in client in a database. but how does server access every clients data.
View 9 RepliesHow would i send different types (.png/.bmg/.mp3) of file over a tcpconnection (server / client)
View 2 RepliesI have a host page with multiple user controls in it. Some of these controls have a user created property named Enabled, and is boolean.In some controls the default value for Enabled is set to False. In the host page, I am able to access the property and set it to True. The control does what it is supposed to.On this host page there is a "Run Report" button which executes a Server.Transfer to a "Results" page.In the codebehind of the results page, control values from the PreviousPage are checked via other user created Properties for the controls and added to a ParamterList.
I am attempting to check the Enabled property of the controls on the PreviousPage, however when this is done, it appears that the Enabled property is set to that of the default (in this case False), and not what I had set it to on the page when it loaded.Does the value of this property need to be put into a hidden text box or something so its value is available after the ServerTransfer? It seems like any control which contains a value is retrievable via the PreviousPage and its user created property, but any variable set inside of the control is reset back to its default value.