Consider this code:
Partial Public Class MyAspNETClass
Inherits System.Web.UI.Page
Protected Shared MyVariable As String
Is Myvariable a variable used local for each instance of the page ? Or that variable is "shared" for all users accessing my page? Is MyVariable saved in server memory, or is it saved on the viewstate of aspx page?
Possible Duplicate: Use of var keyword in C# Hi, I am pretty new in C#,I would like to know the best practices in declaring variables.I know it is possible to use VAR (explicit declaration) or the DataType when declaring a variable (implicit).
View 3 RepliesI am able to access the controls of ".aspx" file in ".aspx.cs" directly without any declaration in ".aspx.cs" or in designer.cs. How is this possible? This is happeing only if I open website as using File System.
Create a new ASP.NET web site application with Visual Studio 2008. So following three files will be created automatically
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How btnSave is being recognized by .cs file without defining it anywhere as an object of System.Web.UI.WebControls.Button?
I get a message - "Function without an 'As' clause" for HMAC_MD5 and "Variable declaration without an 'As' clause" for Key and Value. But the code works. But the messages still exists. Is there a way to fix this to avoid the messages?
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im developing an asp.net website application but suddenly all changes i make to the page in the visual studio designer are not being saved for some reason. Every thing i do in the code behind file is saved with out any problem, also if i edit the .aspx file but in sourceview, the changes are saved, but if i drag a control from the toolbox onto the page designer and set some properties and then save, nothing will have been saved when i close and re-open the page, all changes are lost.
View 1 Repliesim developing an asp.net website application but suddenly all changes i make to the page in the visual studio designer are not being saved for some reason. Every thing i do in the code behind file is saved with out any problem, also if i edit the .aspx file but in sourceview, the changes are saved, but if i drag a control from the toolbox onto the page designer and set some properties and then save, nothing will have been saved when i close and re-open the page, all changes are lost. Its confusing and i have no idea why.Edit: also this happens on only one aspx file. All the other files edits are saved.[URL]
View 2 RepliesI have a user control in which I have declared a connection string as a private class variable.
I have a bunch of cascading dropdown lists in this control.
In one of my subroutines PopulateDdlPostalCodes I get an error "Connection was not initialized".
In all the other subs that use Conn, the class variable is being recognized.
If I duplicate the declaration of Conn in this sub then all works ok.
Why is this sub different than all the others?
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I have a custom control in an aspx page that has a property named Size
public int Size
{
get { return Convert.ToInt32(ViewState["CreativeSize"]); }
set { ViewState["CreativeSize"] = value; }
}
This property is set in the aspx page to a value lets say 500 during a postback called by a Button control that is in the page (not in the custom control).
I also have a button inside the custom control that raises a postback like this
protected void btnUpload_Click(object sender, EventArgs e)
{
if (fuBannerfile.HasFile)
if (fuBannerfile.FileContent.Length / 1024 > this.Size)
;//code here not important
}
When this event is called the "this.Size" property is 0. I also noticed during debugging that during Page_Load of the page, if i access the property like this:
int size = customControlId.Size;
the property is set to 500. But after that when the debugger reaches the event inside the control the property is 0.
I have a web site with some aspx pages. There are occasions when a button on a page is clicked and instead of executing the code written on button click, the page simply reloads and losses values that was entered in various controls on the page.
This does not happen everytime, but randomly. This erratic behaviour is not restricted to any one page , but happens throughout the site. What could be the reason ?
I've defined a session variable in my Session_Start procedure
void Session_Start(object sender, EventArgs e)
{
<other stuff>
string sAdmin= bAdmin.ToString();
Session["SessionAdmin"] = sAdmin;
}
Then in my masterpage I want to use the Session Variable to conditionally show some links in a list.
How do I write the Boolean expression to correctly access the session variable SessionAdmin?
Here's what I have:
<div id="menu">
<ul>
<li><a href="/EmployeeTime.aspx">Employee Time</a></li>
<% if ( *** a Boolean expression involving Session variable "SessionAdmin" *** ) {%>
<li><a href="/Employee.aspx">Employees</a></li>
<li><a href="/ProductLine.aspx">Product Lines</a></li>
<li><a href="/Task.aspx">Tasks</a></li>
<li><a href="/Type.aspx">Work Types</a></li>
<li><a href="/Activity.aspx">Activities</a></li>
<%} %>>
</ul>
</div>
How do I correctly define my boolean expression? I've been looking, but haven't found the right syntax.
I have a wizard control. When someone clicks a button within the wizard control I automatically advance to the next step (rather than forcing them to click next). However, this seems to cause the session state variable not to be saved. I've done some research and noticed that Response.Redirect does hard redirects that truncate page execution - and that you can add a false parameter to prevent this...what I'm wondering is if the wizard control is doing the same thing and if so, if I can add a parameter to this as well?
View 1 Repliessales.aspx.vb
Custom function which stores the current DATE into todayDate. I use this function to convert system date into SQL friendly date.
sales.aspx
I used Data Grid and SQL Data source.
SelectCommand="select * from sales where aab = 110026"
I want my select statement should take the date from todayDate.
i.e.: SelectCommand="select * from sales where aab = todayDate"
How to write this statement in correct syntax.
I want to write own control which can contain other. And I want to define content of the control in the .aspx file where the control is defined. I have written such control. But now I have issue with ViewState of inner controls of my control. The following samle illustrates the issue: I defined two asp:DropDownList ID="ddl1" and ID="ddl2" One of them is inside of my control and other is outside. When posback is occurred asp:DropDownList ID="ddl1 loses state and becomes empty. How to say ASP.net to store state of inner controls defined by this way?
MyControl.ascx:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MyControl.ascx.cs" Inherits="DynamicControls.Controls.MyControl" %>
<div class="box"> [code]....
Is it possible to use a session variable in the markup aspx page ?
Cause I have a gridview that use an sqldatasource and in the UpdateCommand I want to include a the session variable : session("username").
Ex :
UpdateCommand="UPDATE departments SET DEP_name = @DEP_name, DEP_active = @DEP_active, DEP_date_stamp = CONVERT (CHAR(8), GETDATE(), 112) + ' ' + CONVERT (VARCHAR(8), GETDATE(), 108),
DEP_user_stamp = <% session("username") %> WHERE (DEP_mnc = @original_DEP_mnc)">
This give me an error :
Server tags cannot contain <% .... %> constructs.
I have a memory leak somewhere that I cant find. Every few days my server will crash, and just before that I log a ton of SQL errors stating that it is "out of memory".
I cant find it anywhere, all of my connections are being disposed like so:
[Code]....
Then I call the connection from my pages like so:[Code]....
That is all pretty straight forward. The connection is disposed because it is implementing the USING clause. I am opening the connection in my connection manager class, and not where it is being utilized?Or, could the problem be in the below method I am using to populate a SqlDataReader:[Code]....
Now, at first it appears as though this could be the problem because the Connection isn't part of a USING clause, however doesn't the 'Data.CommandBehavior.CloseConnection' pretty much do the same thing. This makes sure that the connection is closed when the reader is closed, right? Here is how I call that above reader from my login page code behind:[Code]....
So the DataReader will get closed even without the .Close() because it is in the USING, and the connection should get closed because I specified it in the ExecuteReader paramters right?
At some point in the last month, two web application projects that I've been working on have stopped showing updates to aspx and ascx files until IIS is restarted, or the website they belong to is reset. This seems to be very random and I can't find any reason in the web.config sections that would cause this change. What are some good places to look for a source to this issue?Current caching parts of web.config: Removing the outputCacheProfile and restarting IIS made no difference.
<caching>
<outputCacheSettings>
<outputCacheProfiles>
<add name="ClientResourceCache" location="None" enabled="true" duration="3600" varyByParam="*" varyByContentEncoding="gzip;deflate"/>
</outputCacheProfiles>
</outputCacheSettings>
</caching>
Commening out the staticConent and restarting also made no difference
<staticContent>
<clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="1.00:00:00">
</clientCache>
</staticContent>
<caching>
<profiles>
<add extension=".gif" policy="DontCache" kernelCachePolicy="CacheUntilChange" duration="0.00:01:00" location="Any" />
<add extension=".png" policy="DontCache" kernelCachePolicy="CacheUntilChange" duration="0.00:01:00" location="Any" />
<add extension=".js" policy="DontCache" kernelCachePolicy="DontCache" duration="00:01:00" location="Any" />
<add extension=".css" policy="DontCache" kernelCachePolicy="DontCache" duration="00:01:00" location="Any" />
<add extension=".jpg" policy="DontCache" kernelCachePolicy="CacheUntilChange" duration="0.00:01:00" location="Any" />
<add extension=".jpeg" policy="DontCache" kernelCachePolicy="CacheUntilChange" duration="0.00:01:00" location="Any" />
</profiles>
</caching>
We've also tried adding .ascx and .aspx extensions with CacheUntilChange which made no difference. Other sites with these same settings aren't having the issue. Edit: Originally this state that there also was no update when the project was built, I haven't personally been able to confirm that issue but was told by another developer that was occurring.
If a server control was declared like this
<my:customControl id="cc1" runat="server">
</my:customControl>
is it possible to access the text between the tags?
I have an XSLT transform I am using to process an XML file, inserting it into the body of my aspx page.Reference the following for background information:
background on xml/xslt
I have the following in my xml file:
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl" [code].....
In the following page what is Container? There was no declaration of Container in anywhere in the page. How and why is it used?
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I work in VS 2008. Whenver I add a server control(Label) and set it properties in aspx.vb and build the solution, I get the error "Label1 not declared". While analyzing this issue I noticed that the event handler statements for the Label1 where not added in the designer.asp.vb file. These statement would actually be added automatically when I drag and drop a control to my webpage.
I would also like to inform the scenario after which this problem came to me. I was working in VS 2008 , VS 2005 and VS 2003 in the same machine.Could this have caused the issue ?
Now each and everytime when I add a control, I am adding the "With Events" code in the designer page to make my build succesfull which makes me to spend more efforts.
I have searched the web for the answer and saw that mostly variables are saved in viewstate on page.prerender event. Then the value of the variable is set back in page load event.However, when I save a variable in viewstate on prerender or load events, how can viewstate store the value of the variable after it is changed dynamically on codebehind?
Let's say, after page is loaded, user clicked a button which changes the value of the variable in its onClick event. Then the postback event raised since the button was clicked. According to me, the new value should have been lost and cannot be saved in the viewstate if the variable is saved in the viewstate only in prerender event. Because on postback the prerender event wont fire and the value cannot be saved.
Shouldn't I save the variable in the viewstate just before the postback event rises?? If so, how can viewstate store the new value of the variable if the viewstate is saved in prerender event?
What am I missing here?I get the error Declaration Expected @ myPostData=
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Dim encoding As New ASCIIEncoding()
Dim RateXML
As
String =
"123"
'Format the Data
Dim myPostData
As
Byte()
myPostData = encoding.GetBytes(RateXML)
^^^^^^^
I have been getting this error a lot lately with some of my users, and I had a couple of concerns with view state and I have read so many articles but I am still lost..
1. I use masterpage on all the pages and I need viewstate for some of the pages but..
There is a page where a user will fill out the information and then submit this data to a cgi server, and it is where I get most of the Client Disconnected errors, what would happen if I disable viewstate when they click on that button?
Now when a user browses from one page to another, does the view state from the previous page get deleted? If not how would I delete it?
Does the master page have its own viewstate? Would I be able to make sure none of items on my master page are using the viewstate?
I have a shopping cart page (Cart.aspx) that has a button that will (sometimes) post to a third party payment gateway, if payment is necessary. The payment gateway will process the payment and then do a silent post to my website (Order.aspx) so I can update the order status.
Order.aspx always throws an invalid viewstate error, even though viewstate is disabled on the page.
What's happening is that Cart.aspx (which has viewstate enabled) posts to the payment gateway, and the gateway will post it back as part of the silent post. Even though Order.aspx has viewstate disabled and validation disabled, it still tries to validate the __viewstate field it's being given.
I know setting EnableViewState=false will disable the rendering of the __viewstate field, but if another page provides the field, shouldn't it still skip validation? I tried calling ViewState.Clear() on the Page_Init event of Order.aspx, but ViewState is apparently empty. how to get around this? I don't want to disable ViewState on Cart.aspx (in some cases it may be necessary), but I can't figure out how to clear it on Order.aspx.
Any tips How to figure out where is memory leak in my Facebook app, its ASPX using Facebook toolkit DLL and I am afraid the bug may be in that CS library.
The problem is that after one week uptime, server is running out of memory and needs to be rebooted, there are quite many users and I cannot run debugger on this "production server", so I would need to simulate somehow use on my local PC.