Web Forms :: Can CheckBoxList Name Be Templated To Hyperlink?
Jan 3, 2011
I have a CheckBoxList that displays a list of category names. Its datasource fields contain the category name, rate, its HTML page identifier "pagea1234.html" among other selected fields.The CheckBoxList's DataTextField = "Name" and the DataValueField = "Rate". I would like the DataTextField - "Name" to display as a hyperlink to its respective html page ie = "www.abc.com/page_A1234.html"
I need to charge my checkboxlist1 from database, eg load fruits and vegetables. When selecting fruits, new filter based on the previous selection in my checkboxlist2. for specific search.
I am fairly new to asp.net programming. I found this custom control that uses ajax to update the contents of the control and it is working perfectly. However, I need to access some of the asp.net labels and images in the databound event so I can set their values/properties appropriately, and am not sure how to go about adding additional code or accessing these in my custom control (I have been googling endlessly with no results). My code for the custom control is below.
Imports System Imports System.Text Imports System.IO Imports System.Collections Imports System.Web Imports System.Web.UI Imports System.Web.UI.WebControls Imports Microsoft.VisualBasic Namespace myControls Public Class AjaxDivView Inherits CompositeDataBoundControl Implements ICallbackEventHandler Private _itemTemplate As ITemplate ''' <summary> ''' The ItemTemplate is used to format each item from the data source. ''' </summary> <TemplateContainer(GetType(DivViewItem))> _ <PersistenceMode(PersistenceMode.InnerProperty)> _ Public Property ItemTemplate() As ITemplate Get Return _itemTemplate End Get Set(ByVal value As ITemplate) _itemTemplate = value End Set End Property ''' <summary> ''' Register Javascript ''' </summary> Protected Overrides Sub OnPreRender(ByVal e As System.EventArgs) 'Register Refresh Function Dim eRef As String = Page.ClientScript.GetCallbackEventReference(Me, Nothing, "AjaxDivView_Result", "'" & Me.ClientID & "'", "AjaxDivView_Error", False) Dim refreshFunc As String = "function AjaxDivView_Refresh() {" & eRef & "}" Page.ClientScript.RegisterClientScriptBlock(Me.GetType(), Me.UniqueID, refreshFunc, True) MyBase.OnPreRender(e) End Sub ''' <summary> ''' Iterate through the data items and instantiate each data item in a template. ''' </summary> Protected Overloads Overrides Function CreateChildControls(ByVal dataSource As System.Collections.IEnumerable, ByVal dataBinding As Boolean) As Integer Dim counter As Integer = 0 For Each dataItem As Object In dataSource Dim contentItem As New DivViewItem(dataItem, counter) _itemTemplate.InstantiateIn(contentItem) Controls.Add(contentItem) counter = counter + 1 Next DataBind(False) Return counter End Function ''' <summary> ''' Render this control's contents in a Ul tag ''' </summary> Protected Overrides ReadOnly Property TagKey() As System.Web.UI.HtmlTextWriterTag Get Return HtmlTextWriterTag.Div End Get End Property ''' <summary> ''' Render my contents to a string and send the result back to the client ''' </summary> Public Function GetCallbackResult() As String Implements System.Web.UI.ICallbackEventHandler.GetCallbackResult Dim builder As New StringBuilder() Dim sWriter As New StringWriter(builder) Dim hWriter As New HtmlTextWriter(sWriter) Me.RenderContents(hWriter) Return builder.ToString() End Function ''' <summary> ''' Whenever I get called through AJAX, rebind my data. ''' </summary> Public Sub RaiseCallbackEvent(ByVal eventArgument As String) Implements System.Web.UI.ICallbackEventHandler.RaiseCallbackEvent Me.DataBind() End Sub Public Class DivViewItem Inherits WebControl Implements IDataItemContainer Private _dataItem As Object Private _index As Integer Public ReadOnly Property DataItem() As Object Implements System.Web.UI.IDataItemContainer.DataItem Get Return _dataItem End Get End Property Public ReadOnly Property DataItemIndex() As Integer Implements System.Web.UI.IDataItemContainer.DataItemIndex Get Return _index End Get End Property Public ReadOnly Property DisplayIndex() As Integer Implements System.Web.UI.IDataItemContainer.DisplayIndex Get Return _index End Get End Property Protected Overrides ReadOnly Property TagKey() As System.Web.UI.HtmlTextWriterTag Get Return HtmlTextWriterTag.Div End Get End Property Public Sub New(ByVal dataItem As Object, ByVal index As Integer) _dataItem = dataItem _index = index End Sub End Class End Class End Namespace
I want to read from database without using templated control like gridview, listview ...etc I am being able to read from db, but shows only the first row;
I have a gridview and one of the fields is a template field. The item template is a label and the edit template is a drop down box that all works lovely.in the Gridview1_RowUpdating event I would like to compare the original value for this template field with the new value (see if it goes from Pending to Approved). but I am struggling to find the old value for this field. I could save it to a module level variable in the GridView1_RowDataBound when I set the row to 'edit' but I think there is a better idea out there. I have tried to access the datarowview but it keeps coming back as Nothing e.g. This retuns nothing:
[Code]....
Does anyone have any ideas other than recording the data in the RowDataBound event please?
I'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:
[Code]....
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'm working on a user control that renders couple nested divs (a rounded corner box to be frank). This is a templated user control, which means that user can put any control he wants into the header, body or footer of this box. Everything is working fine, except the fact that server-side controls can't be retrived from my box. Take a look at this code:
[Code]....
Now codebehind of that control:
[Code]....
I have cut out all the unimportant stuff.Now when I use this control:
[Code]....
I want to access controls in page codebehind file (on Page Load): LiteralNewses.Text=""; but compiler returns an error that LiteralNewses doesn't exist. Also FindControl method can't find this literal.Any tips on what's wrong with this code? According to MSDN, setting TemplateInstance to Single ensures that controls from template will be accessible but not in my case...
I've been assigned changes to make to an ASP.NET project. The WebForm I'm working on needs to dynamically display and hide controls in response to user actions.
So far, so good. My approach would be to create a little JavaScript. However, on this page, the markup is part of a template for a Telerik control (which I know nothing about). I'm not sure the ramifications of this. Can I still use JavaScript for templated markup?
I tried to insert some existing JavaScript in the page. The first problem I have is my use of <%= ControlName.ClientID %>, which produces an error because the name of the control in the template is not seen to exist by ASP.NET.
Is there another way to do this, or am I just going to run into more problems?
I've been reading about it and abstracted both M and C from MVC. My question here is just to help me understend how the View works, here it goes:
I've got 2 tables: List and Item, both of them have repositories and controllers, in the Lists View i want it to be possible for me to add and remove Items. The Item will not have a page of its own, everything will be done in the List Create and Edit page. I tried using EditorFor, DisplayFor, they dont seem right. Is it? How could I do that?
Curiosity: if I added another table: PossibleItems, which contains the possible values for the Items (o rly?) and will have its own page for including possible items, how would it go? This might seem like an exercise from a MVC Tutorial book .
Can I seek some advice here if I want to incorporate some automated scaffolding in my MVC 2 web application what is the best way to go? Should I be considering: MVC 2 Templated Helpers, or Dynamic Data (with support for Entity Framework) Roughly speaking I want to layout my own website layout in MVC 2 but then:
for high usage use cases custom define the page, for CRUD maintenance pages hook the website menu to point to some scaffolded auto-generated pages (i.e. it is for this item that I ask the above question). I've had a look at the Dynamic Data pages where you can add/edit/delete all aspects of an EF entity, so it's this type of thing I'm after (e.g. have an Edit Person menu link that when click launches an auto maintenance page for Person)
The idea being here is that the only acceptable items in "ItemTemplates" are the tabitem types. There are many asp.net controls that use this, for example the ScriptManager class only allows you to specify certain types of objects under its various collections. Maybe thats the key to this.. I want to add a collection as opposed to a template. The idea is that in code I will then iterate over each "tabItem" and create the tab as I want it to look (probably rendering div's etc). Ive had a look at most of MSDN link on how to create templated controls but it doesnt seem to do exactly what I want it to. Would be grateful for some assistance.
In my web application I want to log certain user interactions etc, like "User ABC joined Group XYZ" Therefore I want to set up a logging mechanism that logs into a Mssql database. I'm now trying to find a good database design to achieve flexibility.
First of all, I don't want to log strings like "User ABC joined Group XYZ". I'd like to separate the content "ABC" and "XYZ" from the template. So I'm looking for a templated logging database.
Something like this: table: UserLog
IDLog int primary key [code]......
I think this database structure would give me enough flexibility to add/remove/edit specific log types (like 'User ABC did something else'). For example I might want to add some information to a specific log entry for future entries. Therefore I create a new UserLogTemplate that references the same UserLogType. That is how I would achieve downward compatibility.
Does anyone have an example for how to create a Dynamically Templated Listview with prefernces page to specify which columns & column order)? Also the listview would also have Edit, delete and insert options if possible. And uses the n-tier approach with Bus Layer and does NOT use LINQ.
I'm putting together a templated, databound control. Presently it works with the following syntax... <cc:ItemChooserControl ID="ItemChooser" runat="server"> <TitleTemplate> <h4><%# DataBinder.Eval(Container.DataItem, "DisplayName") %></h4> </TitleTemplate> </cc:ItemChooserControl>
Problem
What I would like though is that the shorter, simpler Eval would work instead. <h4><%# Eval("DisplayName") %></h4> What I get however when using straight Eval is an error: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
Code
I'm databinding to a custom HtmlTableCell... public class TitleTemplateTableCell: HtmlTableCell, INamingContainer { private object m_DataItem; public virtual object DataItem { get { return m_DataItem; } set { m_DataItem = value; } } }
With the following custom DataBind (non-related code removed)...
foreach (object dataItem in dataSource) { TitleTemplateTableCell title = new TitleTemplateTableCell(); TitleTemplate.InstantiateIn(title); // TitleTemplate is the template property title.DataItem = dataItem; title.DataBind(); }
I'm creating a custom templated composite control. If there is no 'ItemTemplate' specified in the mark-up, how do I create a default template programmatically?
I have a databound grid with a templated field column that is a checkbox. When the user checks the checkbox, it will autopostback and update the row to indicate the box's check state.
My first attempt was to simply use the OnCheckedChanged method, but when this gets called, I have no way to know which row the checkbox came from. Thus, I don't know which row to update.
Can anyone suggest a method to determine which row the checkbox that fired the oncheckedchanged event came from? Or can you suggest a better way to achieve what I need to do?
I cannot bind the checkbox to the data column because I do not want the checkbox disabled in select mode, and do not wish to require the user to enter edit mode to change the value. I also need all rows to be editable. So, the best route seems to be in a templated column.
How to change the values in gridview on text change of templated control without databind again?the value of templated text boxes should change If i change the value of one of the templated textbox then accordingly(By mathematical calculations) the vlaues of all tempated textboxes should also change.
I have a ObjectDataSource and a ListView referencing it.
I have created a Templated User Control (see: http://msdn.microsoft.com/en-us/library/36574bf6.aspx) and placed it in the ListView's InsertItemTemplate It has one template <ContentTemplate>. Inside that template, I've defined a couple of server controls with their properties = '<%# Bind("colName") #>'.
how to "discover" hyperlink in some text and convert that hyperlink in html hyperlink with asp.net (or javascript). For example, if a user enter this text:
You found it at [URL]
How can i found and convert in html like :
You found it at <a href='http://www.foo.com'>http....</a>
Basically, I have a custom templated control with a custom data container class. When a developer adds an instance of my control to a page, they can define the controls in the LayoutTemplate however they like, as follows:
I would like my control to automatically move the "ml_errormessage" (databound content from Container.ErrorMessage - hard coded token in the property) to be a class of its containing element to make it easier for jQuery to use a selector to find the element and dynamically insert the error message client side. More importantly, I would like it moved out of the way so the class name doesn't get replaced by the content and jQuery can find it as many times as it needs to during the page lifecycle. In other words, I would like the output to look like this without the developer changing the input template or resort to using custom controls in the template:
I would like to move the value using the controls collection rather than resorting to string parsing of the output, if possible. However, when I interrogate the collection in an override of OnPreRender, the control in the template looks like this in the debugger:
As you can see the "ml_errormessage" value is nowhere to be found. Upon analysis of the DataBind event of the Control class using Reflector, I see that it delegates the binding behavior to each control. In other words, each control handles its own databinding. However, since I have no way of knowing in advance what control types will be in the template, how can this change be done?
Note: an acceptable alternative would be to add a new HtmlGenericControl (span) in the exact spot where the "ml_errormessage" is and add it as a class to this new control.On a side note, is there an easy way to get the control's output to indent for easy reading during debugging?
