Web Forms :: Operation Is Not Valid Due To Current State Of Object
Sep 8, 2013
I'm facing a very serious issue like application is throwing an error "Operation is not valid due to current state of an object" when have a post back. My page has a grid view with text box inside without paging because it's a delivery page, I was googling and understood this error can over come by addingÂ
<appSettings><addkey="aspnet:MaxHttpCollectionKeys"value="2001"/></appSettings> in web.config file, I added the same with more value, but system is still throwing the same error.
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May 23, 2010
I am facing some problem when i try to see my report in report server.
I publish my report in report server. when i call
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http://localhost/Reports/ and click on my report it gives a SSRS error "Operation is not valid due to the current state of the object".
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Mar 29, 2011
I am using static class to do every job related to Database. In this class Connection Object is static but i am creating command object in the method. I read a form post here [URL] about creating connection object local. If we do like that how can we use Connection pooling? There is an example code below.
I am creating a connection object with pooling (Validate Connection=True; Min Pool Size=10; Max Pool Size=200; Incr Pool Size=10; Decr Pool Size=5;). I am expecting to use connection pool by static connection object (this obje has a connection poll) with dynamicly created commands. Am I wrong? Sometimes i am getting "System.InvalidOperationException: Operation is not valid due to the current state of the object." error. Is it because static connectin object?
[code]....
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Apr 12, 2010
I am now building the NerdDinner tutorial from asp.net/mvc.
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Apr 2, 2010
I want to remove checked items from checklistbox (winform control) in class file method which i am calling asynchronously using deletegate. but it showing me this error message:-
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i have tried invoke required but again got the same error. Sample code is below:
[code]....
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Apr 16, 2010
I'm encrypting the web.config in our web sites using aspnet_regiis. However, I want the ability to export the encryption key so if we need to move from Machine A to Machine B, asp.net will be able to decrypt it. When I run aspnetregiis -px "NetFrameworkConfigurationKey" c:keys.xml -pri, I get the following : 'Key not valid for use in specified state'. I've seen all kinds of responses online but they don't seem to apply. It's not an invalid key because when I use aspnet_regiis to encrypt sections of the web.config, they encrypt fine.
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Jan 7, 2011
I moved over an older 1.1 asp.net project to a new win 2008 web server and since me move I am getting this error on a lot of my reports that have charting in them. I added back in the owc11 and the microsoft.office.interop.owc11 references tot he project but am still getting the errors. in my code behind it points to this reference. Dim cht As New Microsoft.Office.Interop.OWC11.ChartSpace
[Code]....
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Mar 15, 2010
while comeing back from page2 to page1 I need to load the checkboxes in the same state when the page navigated from Page1 to page2.Below is the code that I have written.All the loops and conditions get executed as expected,but when the page loads all the checkboxes are unchecked,even thouse which were checked.I am not able to understand why the code is not giving the expected result?
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Mar 7, 2010
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Aug 19, 2010
We have an applicaiton that was converted to the new framework using the wizard in Visual Studio 2008. When we install the applicaiton in production and change the iis settings to use the 2.0 framework we start to see these errors in the event viewer on the web servers. We are using SQL Server Session State and have 3 web servers in a load balancer. Object reference not set to an instance of an object.</Message><StackTrace> at System.Web.SessionState.SessionStateModule.PollLockedSessionCallback...
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Jul 16, 2010
I have a problem.This particular code when used on local machine is working fine, but when it is used on serverit gives an error like " Object reference not set to an instance of an object.Exception Details: System.NullReferenceException: Object reference not set to an instance of an object._isRefresh = _refreshState == (bool) Session["__ISREFRESH"]; "
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Nov 3, 2010
global.asax:-I have defined a struct (my_struct)-I add a List of structs (List<my_struct>) to Application["MyList"] In default.aspx:-I have defined the exact struct (my_struct) and want to cast the Application["MyList"] object to the List of structs.
example: x = (List<my_struct>)Application["MyList"];
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Mar 1, 2011
private
static
void ReadKey(SymmetricAlgorithm
algorithm)
{
byte[] converted =
Convert.FromBase64String(ConfigurationManager.AppSettings["Key"]);
byte[] bytes =
UnicodeEncoding.ASCII.GetBytes(("$@|T"));
algorithm.Key = ProtectedData
.Unprotect(
converted,
bytes,
DataProtectionScope.LocalMachine);
}
I am getting the following exception "Key not valid for use in specified state"
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Nov 9, 2010
[Code]....
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Apr 14, 2013
In my asp.net +vb+access web i have made a login page and the code is as under
Dim connectString As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:webauth.mdb"
Dim con As OleDbConnection = New OleDbConnection(connectString)
con.Open()
Dim cmd As New OleDbCommand("select * from Users where userid =@userid and Password=@password", con)
cmd.Parameters.AddWithValue("@userid", txtUserName.Text)
[Code] ....
I am getting error The connection was not closed. The connection's current state is open.
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May 7, 2015
I would like to ask why I encounter this error when multiple user accessing in my online page.
Here is the error message.
Execute Reader requires an open and available Connection's current state is connecting.
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Jun 14, 2010
I have a validator that check an input.
i what that the validator displayed "valid" if the value is valid, and "invalid" if the value is hasnt passed the validation.
can manage without adding an additional label for the valid state(by setting the visibility: true/false)?
does the validator control has am alternative value, or i have to override it?
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Jan 26, 2011
I bind textbox to a property of an object. After running the app, if the value of textbox is changed, I expect the object to update this property .This does not happen. I also understand that I am recreating the object from viewstate on postback, which is wrong. how to persist the state of object on postbacks all.
[Code]....
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Mar 14, 2010
I want to be able to get the current bound object in the ItemTemplate of a ListView control.
Here's an example of what I want to do:
<asp:ListView ID="UserList" runat="server">
<LayoutTemplate>
<asp:PlaceHolder ID="itemPlaceHolder" runat="server" />
</LayoutTemplate>
<ItemTemplate>
//How can I get the current bound object in here?
</ItemTemplate>
</asp:ListView>
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Jul 29, 2010
I'm really drawing a blank on this one. I've been working on globalization but the DateTime seems to always revert back to the CurrentThread's culture.
I've got a textbox with the date expressed as a string:
// the CurrentThread's culture is de-DE
// My test browser is also set to de-DE
IFormatProvider culture = new System.Globalization.CultureInfo("de-DE",
true);
// en-US culture, what I'd ultimately like to see the DateTime in
IFormatProvider us_culture = new System.Globalization.CultureInfo("en-US",
true);
// correctly reads the textbox value (22.7.2010 into a datetime)
DateTime dt= DateTime.Parse(txtStartDate.Text, culture,
System.Globalization.DateTimeStyles.NoCurrentDateDefault);
// correctly produces a string 7/22/2010
string dt2 = dt.ToString(us_culture);
At this point I want a DateTime that's in en-US I've tried both:
DateTime dt3 = Convert.ToDateTime(dt2, us_culture);
DateTime dt3 = DateTime.Parse(dt2, us_culture);
But both produce de-DE DateTimes. My motivation in asking this question is the rest of the business logic is going to be calling dt2.toString() and will result in an incorrect date time string. I realize I could change toString() to be toString(us_culture) but I'd rather not change all of the rest of the business logic to accomodate this change.
Is there a way to get a DateTime in a culture other than the CurrentThread's culture?
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Jan 20, 2011
I am trying to write a code that I can attach to a .aspx page using <!--#include file="newcode.aspx"-->. What I am trying to do is check to see if they have an current or active session and redirect them if they don't. It seems like this should be pretty
simple, but I have not been able to get anything to work. This is only being used on One page. What I have tried is:
[code]...
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Oct 6, 2010
I have a section in my web app that displays the user's name, the current datetime and a logout link. What i would also like to display is the time left for the session.Is this possible? I'm using an ajax timer to give the user the real time, so if i could display also the time that is left for the session to end would be great.
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Jul 24, 2010
In my application there is a functionality to show an excel sheet.Due to some reason we need to uninstall Microsoft Office.
Now the above functionality is not working and I am getting following error.
COM object with CLSID {00024500-0000-0000-C000-000000000046} is either not valid or not registered.
how do I resolve this without re-installing Microsoft Office?
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Apr 8, 2010
I would like to know if anyone knows of any way or software that will give me a count of the number of unique users to use my site in the last 5 minutes. I want to make some updates to my site during the day but I want to check to see if there is slow traffic then I can do it but if it's busy I can wait till a later time.
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Mar 14, 2011
Given an instance of a control SomeControl that is in a some file (could be a usercontrol/ascx, or an aspx) how can I get a reference to the class to which it belongs?
In a usercontrol, SomeControl.NamingContainer seems to be reliable.
In a page that inherits from a MasterPage, this will return a reference to the ContentPlaceHolder, not the actual class that defines the aspx. What I would want in that case is SomeControl.Page
Parent will return the parent control in the heirarchy so isn't much use.
Is there any method for getting this directly regardless of what kind of thing it is?
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