I have a masterpage that contains a user control. The usercontrol uses callbacks for various operations. However, every time a callback is issued from the user control it is propagated down to the pages that inherit from the master page. How do I determine the id of the control that issued the callback so that I can stop these callbacks from destroying the state of the pages?
View 1 Repliessender.GetType().Name returns me "default.aspx".How do I get the name or identify the control that caused the page postback (Page_Load() event)?
[Code]....
I have a <asp:Wizard> that is only applicable for a logged-out user. If the user is currently logged in, he/she is redirected to another page. On one of the wizard steps, as part of the wizard, I ask for credentials via the <asp:Login> control and log in the user. This presents a problem.
According to MSDN: "When a user uses the Login control to log in to a Web site, all data in the view state and all post data is lost. Do not perform actions in the LoggedIn event that rely on the view state."
Because of this, my Wizard control forgets the step it's on after the login process. MSDN recommends: "If you embed the Login control in a WizardStep object, explicitly set the ActiveStepIndex property in a Page_Load event handler if the user is authenticated. The Wizard control does not automatically advance to the next WizardStep object in this scenario."
However, because all view state is lost, the redirect for logged-in users kicks in, sending the user away from the page. What's the best way to determine, at page load, which of the states the user is in?
Already logged in some time ago; needs to be redirected. Was just logged in from inside the wizard; needs to reach the next wizard step.
I have a simple application with a GridView bound to a LinqDataSource and a DetailView that displays a row from the GridView when it's selected. This works as expected. But now I'm placing the GridView and DetailView in separate TabPanels in an asp.net ajax Tab Control.
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>
<asp:TabContainer ID="CourseFinder" runat="server" ActiveTabIndex="0">
<asp:TabPanel ID="ResultsTab" runat="server" HeaderText="Results" >
</asp:TabPanel>
<asp:TabPanel ID="DetailTab" runat="server" HeaderText="Detail">
</asp:TabPanel>
</asp:TabContainer>
and my code behind file
protected void Page_Load(object sender, EventArgs e)
{
CourseFinder.Tabs[0].Controls.Add(Results);
CourseFinder.Tabs[1].Controls.Add(DetailsView1);
}
When I run the page I'm getting
[ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index]
System.Collections.ArrayList.get_Item(Int32 index) +7483656
System.Web.UI.WebControls.GridViewRowCollection.get_Item(Int32 index) +13
_Default.Results_SelectedIndexChanged(Object sender, EventArgs e) in c:Documents and
SettingsAdministratorMy DocumentsVisual Studio
2008WebSitesWebSite1Default.aspx.cs:35
The line of code getting the error is the one attempting to get the SelectedIndex from the GridView and update my DetailView.
GridViewRow row = Results.Rows[Results.SelectedIndex]; I stepped through the code with the debugger and SelectedIndex is not negative and it's not larger than the number of rows in the GridView. So I'm confused why simply placing the controls inside a Tab is causing this error?
I'm doing a menu that loads levels dynamicly, when you click on a item the next level is loaded asynchronously. For each menu item I have a user control. Every user control is declared in its parent, for example, the "secondlevelcontrol" has the reference to "thirdlevelcontrol".With this level of nesting, I want to manage the asynchronous calls on every user control so, when the first level is loaded the javascript to load the second is loaded too. When the second level is loaded the javascript to load the third is loaded too.
To do asynchronous calls I'm implementing ICallbackEventHandler interface. As you can see in the examples, controls are added to the page as plain html. The method "ProcessOnLoadEvent" executes all lines of the "OnLoad" event of the user control.An example of the implementation is this for the user control of fourth level:
public string GetCallbackResult()
{
return _callbackRendering;
}
[code]...
I have searched high and low on this error, but my problem stems back to which control is causing this problem. In theory the problem starts when someone goes to a specific tab and clicks a button to download a PDF file. After doing that if I use a dropdownlist the error pops up.I have checked the code etc. just cannot figure out which control is triggering the error. I can identify the control that is the problem?
View 14 RepliesI have a usercontrol that uses a callback to update itself. If I add the control to the aspx page everything works fine. However, when i add the control using Page.LoadControl and Control.Add on a Placeholder i get the following error: "The target 'ctl00$ContentPlaceHolder1$ctl00' for the callback could not be found or did not implement ICallbackEventHandler". I tryed assigning the ID of the control also which failed with the same error. I am using asp.net 2.0.
View 11 RepliesI have a a dropdown on a page
<asp:DropDownList ID="drpName" AutoPostBack="true" AppendDataBoundItems="true" runat="server" ></asp:DropDownList>
and I on occasion want to add items to it using javascript/jquery.
When I select the items that have been added and it does a postback I get the following error:
Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
I have a Gridview that I am using in a User Control. The grid loads great and my paging buttons that exist outside of the grid itself work properly. When I click my delete button inside the grid, I am getting an invalid postback message. How should I handle this? My control raises one event by the way.
View 22 RepliesI am starting a new website based on an existing one that I already have up and working. I copied the old website files into a new folder but it will not run. The error suggets that I need to add a reference. So my question is . . . how can I identify the references that are included in the original site?
View 3 RepliesIt may not suitable forum to post this.I'm a ASP.NET developer, I'm just doing a small corrections in a site developed in classic asp.i want to know how to idendify whether the Recordset has records or not? like in asp.net we use dt.Rows.Count In Classic ASP?
View 9 RepliesI want to make a statistical record to identify how many visitors come using web proxies to my asp.net mvc site. How to identify them?
View 1 RepliesI need to handle 404 exceptions differently than all other types of them. What is the best way to identify those 404 exceptions (distinguish them from other exceptions)?
The problem is that there is no a special exception class for 404 errors, I get regular System.Web.HttpException with Message = "File does not exist."
Should I just use exception's message for it or is there a better way?
I am creating a userprofile type of thing in my site i want to show all user SKYPE status whether online or offline how to do
View 1 RepliesDoes anybody know how to properly identify CMYK images in ASP.NET using C#? When I check the Flags attribute of a Bitmap instance, I get incorrect results.
I have created three images to test this: cmyk.jpg, rgb.jpg and gray.jpg. These are respectively CMYK, RGB and Grayscale images.
This is my test code:
[Code]....
This produces the following output:
I have checked the actual images and cmyk.jpg really is a CMYK image.
Apparently, this is a "known issue". Alex Gil had the same problem in WPF (see this question: How to identify CMYK images using C#) and he managed to solve it by using a BitmapDecoder class to load the images. I'm a bit uncomfortable using that solution in ASP.NET because it requires me to add references to WindowsBase.dll and PresentationCore.dll and I'm not sure I want those in a web project.
Does anyone know of any other pure .NET solutions to check if an image is in the CMYK format that I can safely use in ASP.NET?
How will we identify which is the version of the .net framework are used for developing from an application we got without code
View 4 RepliesI've got an application that needs to do some work on startup (before the first request is in). I've added the initialization code in the global.asax file (Application_start method) but this code doesn't seem to be hit after an iis reset is performed.Is there an event which is triggered in an asp.net application when an iis reset has occurred?
View 2 RepliesI have a WCF service that will be using basic authentication and would like to be able identify "who" is trying to use the service. I know that the HttpContext.Current is NULL and in the WCF service, but do not know what the alternative is to get the username.
For the website, I can use:
userName = HttpContext.Current.Request.ServerVariables["LOGON_USER"];
How do I get userName in the WCF Service?
I got one problem while doing one TAPI application based project in C#. I'm using ITAPI3.dll
My problem is.. i'm not getting incoming call information. To get the incoming call information, i'm using the get_callinfo function, but it is showing empty message.
I have an ASP.Net app with a lot of pages in it.My problem is to uniquely identify every page in my app. now the app might have pages with just the page name eg: home.aspx and can have pages with query strings eg:testPage.aspx?q1=1&q2=2.what i have been thinking is since every URL in my app is unique I could use the page name + all query string params concatenated(key and value) to identify the page uniquely.eg:home.asp home testPage.aspx?q1=1&q2=2 -> testpageq11q22.Is this the correct way to go or is there a better way to do it.The reason I want to do this is I need to add at run time some meta data information from a database for each of the pages.The PageID then becomes my unique ID which I can then map all my meta data info in the db to.
[code]...
would potentially point to the same page (where the optional param gives me some kind of meta information thats is not being used to generate the content on the page)
I have two DataSet were mention below DataSet1 & DataSet2. DataSet1 records are already in User Database table. I would like to insert the DataSet2 records to User table, Before going to insert the Dataset2, I am trying to check the duplicate records in DataSet2 Compare with DataSet1. How to identify the duplicate records in DataSet2 using LINQ. I want to Get the List of Duplicate record set. Or Return the True Or False.
Note: In User table SiteId and UserName is Combinational primary key Records.
I know how to identify the current user during a specific browsing session and can thus control the data, etc, made visible to that individual user. I also know how to find out how many users logged in within the recent past, using:
Membership.GetNumberOfUsersOnline()
.... which I believe calculates the number of users who have logged in within the past 15 minutes. However, I would like to know if there is any way to identify all the users who are logged in at a point in time. Is this possible?
I have a UserControl (UC) which is in an UpdatePanel. When the UC is loaded, I run a recursive method to set tooltip for all Button, LinkButton, and DropDownList in this UC. The problem is sometimes I only update 1 control in the UC such as a DropDownList, but I have to call the recursive method on all controls of the UC. I was wondering whether there is any way to identify which controls is updated in the UpdatePanel so that I can update correctly these controls.
View 1 Repliesi created a signup page and enter those values in database. Now i want to create a login page and have to check the details from the data base, whether the user registered or not?
View 1 RepliesI have a stored procedure which is composed of three unions of three different views.
After the views are Unioned together, they are placed into a temporary table.
I need to somehow keep track of the data which comes from the second view, "View2".
Specifically I will later need to compare all Ages of people from the second view.
How can I do this? Here is an example of my unioned views
Select Name,Age,Gender from View1
UNION
Select Name,Age,Gender from View2
UNION
Select Name,Age,Gender from View3