Forms Data Controls :: Load The Same UserControl Multiple Times?
Jan 27, 2011
I have a simple UserControl that I've created that simply allows a user to enter the date. For the time being, it has a single Textbox with ID="tbDate". I am trying to dynamically add this control multiple times via (for example) `placeholder.Controls.Add(LoadControl())` but am receiving the error "An entry with the same key already exists". I could, perhaps, change the ID of the elements but then it would be difficult to grab the value entered by the user.
I am using forms authentication, and a session object to hold user information once the user is authenticated.
I am able to login and log out. I am able to log in and use the "remember me" functionality of the forms authentication.
When attempting to test the "remember me" functionality, the master page load event contains code to check the forms authentication & remember me, and retrieve user info from the database to automatically log the user in. This fires correctly, and the screens all load with the user successfuly logged in, and the users info is successfully stored in a session object.
Without touching anything on the screen, a moment passes and then the master page load event spontaneously fires again, Page.User.Identity.Name still contains the user name, however the session variable is now null, and throws an error.If I tell it to run past this error, it does, and the application continues to function normally, withthe session variables set correctly.
Its almost as if that second firing is ina different session, or something.
I have no problem posting code, but I have a profile class holding / handling the session communication, etc so it is a bit cumbersome.
This is the problem. My datalist, which connects to an Objectdatasource (I implemented custom paging) becomes populated with data only half of the time. When I go to the aspx page which contains that datalist (from another page), sometimes, the datalist fully loads, but sometimes only the header shows up. The header just contains hard-coded text whereas the body (itemtemplate portion) contains things that are binded to the objectdatasource. I thought I would mention this since the problem might have something to do with how things in asp.net bind.
The strange part of this is that when I was testing and debugging within VWD 2010, the datalist loaded fully everytime and I had no issues. When I placed my files on the IIS web server, this is when the problems started happening.What could the problem be? The speed of the IIS web server vs VWD's "internal server"? My page_load, init_load, etc methods are empty for this aspx page. The datalist is solely handled by the objectdatasource_selecting method. Should I explicit call something from one of those early lifecycle methods to ensure proper datalist loading?
The problem is that BindHeaders is called multiple times. I was expecting it to fire only once since a very similar code I used to customize the GridView control to use our mapping utility on the headers works this way.
I have developed an application using Visual Studio 2008. I have a hirerchical gridview and on every row i have a "Payment" button which actually inserts a payment entry in database. Here is the sample screen of that gridview so u have an idea what i am doing. Problem is that whenever user pressed the button of "PAYMENT" it is inserting multiple records in database..it should only fire once and i am failed to understand why its firing multiple times. Refer this link for my payment screen: [URL]
I have UserControl that has asp control(<asp:Button runat="server" ID="btn" />) and I want to render it. I tried 1
[Code]....
It doesn't works because it says that each control that has runat="server" must be in Form.I also tried 2:Because loader.Form is null, I create HtmlForm and added the ctrl to it and then added HtmlForm to loader's Control, BUT it says that it has 2 HtmlForm. So, instead I "injected" HtmlForm to loader like this [Code]....
Now no error is occurred, BUT StringWriter is empty. don't tell me to add Page to solution and override OnRender. I want to do it as I mentioned above.
In my page I would like to load multiple gridview one by one (with or without update panel). Once the page loads I want gridview one to start loading then the next one load and so for the other gridviews.
While the gridview is loading the gridview should show loading gif.
I have a select statement that is supposed to be filling grid with information from an income table. It's only supposed to pull if the income is from the current fiscal year or is less than 1 year old. Currently, what it does is pull multiples of rows and also rows from past income years but only if there is a mixture. For instance, if a person has income from 2005 and 2010 what it will show is this
Income 2005 Income 2005 Income 2010 Income 2010 Income 2010
Does anyone know what I've done wrong? BTW, those results are exact, old income is shown twice, current is shown 3X
Can you tell me how it is better to load classes from the same assembly for multiple times? I will explain:
I have a usercontrol that loads the class from assembly A.DLL using (MyAbstractClass)Assembly.Load(path).CreateInstance(type) each time requested page loads. The control can appear on the page many times (about 20-30) and each of them can load the different type from A.DLL...so if control exists on page 20 times, 20 times (MyAbstractClass)Assembly.Load(path).CreateInstance(type) has been executed.
The question is performance...
Does ASP.NET caches DLLs already loaded dynamically? After first (MyAbstractClass)Assembly.Load(path).CreateInstance(type)and first IO, will ASP.NET load A.DLL from cache on other executions ? Or I need to implement some kind of assemblies caching myself?
If I need to implement caching myself, what is the best and fastest way to do it?
Using Forms authentication, for some reason my login page is called 9 times. it causes some browsers to show "too many redirects!". Even with no javascript and nothing in the page_load event, it is called 9 times.
I have an application that uses an aps:GridView. The GridView is populated using a DataSource that calls a Stored Procedure. The DataSource passes parameters to the Stored Procedure based on some text fields. The page has been running slower than wanted, so I was doing some checking.
I ran SQL Profiler while loading the page, and saw the Stored Procedure was being called twice. I stepped through the code and found out that in the Page Load Complete event was where this was happening. In this event, I set the value of a parameter for the Stored Procedure, then did a DataBind on the GridView to pick up the data. As I was stepping through the code, I watched the SQL Profiler. When I got to the step of setting the parameter, the Stored Procedure had not yet been called. When I stepped through that and got to the DataBind command (before running that step), the SQL Profiler showed that the Stored Procedure had been called. Then I did the DataBind and the StoredProcedure was called again.
My question is, how do I get the parameters set, and get the GridView data bound, and only call the StoredProcedure once? If I comment out the DataBind step, the StoredProcedure never does get called (which seems really strange to me...).
so here is the setup. I am building a page that has a listview, a datapager, and 3 datapagerfield (2 x NextPreviousPagerField, 1 x NumericPagerField), and a objectdatasource to tide all of this together.
It was all working fine until I put a breakpoint into the SelectMethod specified in the objectdatsource control. It seems like that for each datapagerfield control, it is calling the selectmethod and selectcount method. Hence, whenever a user paged, it calls the database 6 times instead of 2 (I don't have caching turned on atm). If I remove one datapagerfield, it will remove 2 calls.
Now this is build in asp.net 3.5 SP1 in VS2008. When I copied the same code files to a asp.net 4.0 VS2010 solution, it duplicate call seems to be gone.
In my project i need to collect customer bank details like bank Name ,Account type ,bank balance etc etc ... what would be the best way to design such that it allows us add multiple bank details to a single customer ?? and after we enter all the details all the banks details should appear in the same screen .
I have a data grid in which I have to display around 12,000 records. Even if I do paging it is difficult to display all the records. Is there any other control or something else so that I can display all these records. Even if I make these as alphabetical also, some times I have to load 1000 records in a page which is difficult.
I created a search page with a lot of different functions. The page takes about 6 seconds to load so I'd like to work on making it faster. I first want to see what functions are taking the most time. I originally tried adding Response.Write(Date.Now()) throughout the code but didn't yield accurate results. I'm guessing it that's because .NET doesn't compile things linearly?
I have a DetailsView control bound to an ObjectDataSource within a User Control (.ascx). It appears that the DetailsView.OnDataBound event is being fired on every page load or postback.
I do not see this behavior with a similiar DetailsView directly placed on an aspx page.
in my aspx page i have some controls loadded dynamic and other one loaded static, when i am loading the user control dynamically,the dynamic usercontrols loaded successfully, but all static control inside page will be removed! i load the user control using the bellow code inside PlaceHolder. this is my code in aspx page:
