I'm trying to implement an ASP.NET DataBoundControl that supports two-way databinding. Unfortunatelly I can't find any documentation on how to do this on the web and even Dino Esposito in his ASP.NET 2.0 Advanced Topics only handles one-way databinding (also the contact form on his blog isn't working). Can anyone provide me with documentation or samples on how to do this?
View 2 Replieshow to implement a custom role provider which has support for parent and child roles?
I have a requirement to have high level Role permissions as per the usual Role provider functionality. However, I also have a requirement to further breakdown permissions into sub roles. I toyed with the idea of having further role instances for sub permissions but I'd prefer to have a native solution which allows for sub roles.
For instance:
[IT]
[IT] > [Admin]
[Extranet]
[Extranet] > [Admin]
In this scenario, the "Admin" role is actually 2 distinct roles, one for IT and one for Extranet scenarios. Ideally, there is no association between the 2 "Admin" roles because they are unique sub roles.
[Edit]: Following Igor's comment I feel I should clarify. The aspnetdb is already hosting multiple applications and therefore the use of the Application Name is not possible to segregate the sub roles as it is already being used to seperate the roles by application.
i need to know what control in asp .net 2.0 to use to get this layout:
i need to display 8 videos at a time using 2 rows with 4 columns, but the control should also have paging (to display 8 items per page).
i've thought of using a formview but the paging for formview is per one article content / datarow only.
i'm also thinking of using gridview but i am not so sure if i can get this layout.
I wanted to make a simple data-entry web application, thinking Dynamic Data would save me time.
But it turns out that the GridView doesn't even support basic user interface scenarios such as inserting a new row.
Since the project I'm building will incorporate this scenario a lot, I'm considering creating my own grid-view control that does exactly what I need.
Is it difficult to develop a web control that supports dynamic data? Are there a lot of complicated hooks that rely on closed-source functionality in the .NET framework?
Or is it as simple as making the control data-bindable and having a DataSourceObject property?
Is it possible Custom Paging in Listview, And also how to add css class for Datapager control?
View 1 RepliesMy problem is that I have a different format table for each section in my form. And I would like to bind data to these tables. A repeater I don't think is going to work. It would be great if I can do it like this:
[Code]....
Where the "+ 1" is the next record from that datasource --which is bound in code behind. Is there anyway, I can accomplish this without resorting to dynamically created tables.
I want to create a ListBox control that supports display of items in two columns. It also needs to support selecting multiple items.
and the ListBox items should be CheckBox. What I need to do?
I have read your article from aspsnippets.com about custom paging it really work, but there are a problem that if there are more record in database (2000 to 5000) than  number of page index  will be goes in large number. like 1 to 200, any way which can divide it  like 12345678910...2000.
View 1 RepliesI've created a templated user control by following the example on the microsoft support pages. I won't post it all but the important part of the CS file looks as follows:
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I'm not sure if the whole _CurrentDataItem business is required, I don't think so.The problem I've got, is that I've tried nesting it inside a FormView control so I can use it to display a record from a database. My ASPX looks like this:
[Code]....
Now, the bound properties (TitleText and TitleSubText) bind correctly, but the nested / template content is blank when the page loads. I'm not sure if this is something to do with the order in which everything is loaded or because I'm missing some code in the SimpleTemplate to get it to bind (etc.).
i have an Gridview with BoundFiled, for the bound field headertext alo coming from the table, but i dont know how to bind the headertext and data. i have used below code
<asp:BoundField runat="server" DataField="column1_data" HeaderText = DataBinder.Eval '<%# Bind("column1_text") %>'/>
but getting error as "The BoundField control with a two-way databinding to field column1_text must have an ID."
I have a asp:repeater control which I am using to display a photo and the Name. So for this I have to execute SQL query and unfortunately I dont have the control of the database - table design. So the photo comes from one table and the Name comes from another table. I wrote 2 sql queries to get both these information created 2 sqldatareader. So now I have to bind the repeater control to both of these reader. But I know it does not work. Is there any other way I can do this? I even tried to nest a repeater control inside another. But that does not work anyway.
View 2 RepliesI have a strange problem. I have made a PagedRepeater control, which inherits from the Repeater, from a tutorial I saw here: http://www.4guysfromrolla.com/articles/020905-1.aspx. It's in VB and I'm in C#, and it didn't quite have all the features I was lookingfor, so, I've modified it quite a bit. I added support for a SqlDataSource control, as well. The only problem is, that it always returns the first item from the SqlDataSource, even when the CurrentPageIndex on the PagedDataSource is set to a different value.
View 1 RepliesI've got a FormView control for which I'm Viewing, Inserting and Updating to a MS SQL Database.
Instead of adding a SqlDataSource control to the page, I've created it in the code behind and declaring the properties/attributes for it during Page_Load.
At the moment, everything is bound and working fine, but I'm having an issue Databinding to the child controls in my FormView with parameters set in the code behind.
This is where I'm at.
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[Code]....
So, I need to be able to bind the DS.InsertParameters.Add("PageTitle", ---) with the txPageTitle control in the Insert Template, same with the PageURL to txPageURL. Is there any easy way to do this from the code behind? I can't seem to find a way to add a parameter without needing to assign it a value.
Bringing back to life an old post that I dont believe ever got solved: http://forums.asp.net/t/1562245.aspxThis may be an old thread .... but no answer was ever given ... and I too have a radio button list and DDL and am stuck in the EXACT same place. If I check one of the two data bound radio buttons, the DDL should repopulate with a different set of results. This works just fine EXCEPT .... the DDL cannot be databound. If I set SELECTEDVALUE of the control to a bind I get this error:Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.I have followed the advice on this page from various users, all to no avail....surely this can be done, and I assume quite simply. Anyone know the answer?
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I have a composite control inside a repeater. I am trying to set the controls public properties inline like so (this is a simplified example):
<uc1:Control runat="server" ID="id" Value='<%# Eval("value") %>'>
When I place the repeater inside a user control INSIDE ANOTHER user control and onto the page this works - the property is correctly set, if I inspect it inside the EnsureChildControls() method of the custom control the composite control's Value propertyis set to Eval("value") as intended.
How can i implement Custom Paging for ListView control using row_number in sql server 2005 stored procedure.
View 2 Repliesi've created a webform with one gridview having connected with the database using datasource. i.e password database with three colomn .
now want to insert the custom dropdown button using server control for each column.
when i select the dropdown list the list should display the value as required.
e.g if i click the uname dropdownlist then it should show the list of names.
if i click on pwd dropdownlist then it should show the list of numbers.
if i select any one of the value in the dropdown list then it should insert into the
database.
can i get code on this type of question...?
I'm trying to extend the GridView control to enable sorting and paging for any situation.
When using my control I am fetching data from a database and filling a DataSet with it, then binding the GridView upon every page load. My first question would be, is this the correct approach?
To sort the GridView I am overriding the OnSorting method which stores the sort expression and direction in the ViewState, then creates a DataView and utalises the Sort method to sort the underlying data. It then sets the Data Source to this DataView and rebinds the GridView.
Paging is handled by OnPageIndexChanging which simply sets the PageIndex property and again rebinds the GridView.
My problem is; when any control causes a postback my GridView is no longer sorted, presumably because it is persistently rebound. If I don't rebind it then the GridView is empty on postback since the data isn't automatically stored in the ViewState. I have considered saving the data source in the ViewState but I would assume that this is bad practice for large amounts of data? - also DataViews are not seralisable.
The only solution I can think of currently is to override OnDataBound and sort the data every time. This results in a double sort when paging triggers a postback which seems inefficient. Code illustration of this below,
[Code]....
I'm looking for the cleanest 'best practice' solution as this is a learning exercise more than anything else.
I am in search to find a control that supports Flash (.swf - files).. Important is that the control is supported in moste Browsers
and important is also that it will be possible to click on this control to open up a new Browser with an URL attached.
What is commonly used for this purpose ?
I'd like to implement a custom paging template for my formview that displays numeric paging as well as next/previous buttons. The pre-defined templates only appear to have numeric first last as an option. Can anyone recommend a good article that covers this?
View 2 RepliesI have read many online articles showing how to implement custom paging with stored procedure and objectdatasource control. So I know the benefits of custom paging on large result sets and I know how to implement it.
In my application, I have a stored procedure which is using ROW_NUMBER and taking parameters such as startIndex, pageSize etc. I also have method in my DAL who call this stored procedure and on my page I have GridView and ObjectDataSource control and they are calling DAL methods and everything is working perfectly fine.
Now I want to implement GridView paging without ObjectDataSource control by calling the DAL methods manually. I dont want to use ObjectDataSource control because I need manual access to the DataTable my DAL methods return which I think I dont have if I use ObjectDataSource control.
how to implement paging without ObjectDataSource control
What is the best method of checking to see if ajax hover control is possible with a browser?
View 1 RepliesI have built a custom control. when i add this custom control in my page twice or more then the it write only one time of its render contest data.
View 4 RepliesWhat if, I'm not using the LOGIN CONTROL but rather creating a Custom Control for Login. Is it possible to have user roles and a site map that redirects to its own destination when the user login?
View 1 RepliesI have a custom control which inherit from the Table class and in the constructor, it takes a an integer as an argument. There is no empty constructor.
Is there a way for the user to set that variable in the properties window after they drag the control onto a form.
I know some .NET controls, you can set the source for the parameter to different things like another control's property, QueryString using just the properties window.
Right now, I have to create the control dynamically. I read the query string and then created the object.