Forms Data Controls :: Databinding To FormView Child Control Programatically?
Mar 2, 2010
I'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.
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Apr 8, 2010
i have the following scenario: one formview. when in editmode there is a child formview linked to the other by a column value. i need to take the value of one of the values of parent formview controls and set it to a textbox of child formview in insert mode. I wish to know which event should I use in codebehind to bind both controls? (that escenario will have paging and must keep the binding as if it was master detail)
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Sep 15, 2010
I am using a form view control which has two binded textbox. Now at this level it works fine and the textboxes show the values from database. But when i insert a panel inside the form view and move these two textboxes inside the panel, they dont show any values. What could be the reason for this?
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May 18, 2010
I am trying to bind a FormView on runtime in codebehind (instead of using predefined datasource).
[Code]....
GetCase will return a DataTable with just 1 row.Then on my aspx:
<asp:FormView DefaultMode="ReadOnly" runat="server" ID="FormView1" DataKeyNames="complaint_ID">
<ItemTemplate>
<asp:Label ID="lblComplaintID" runat="server" Text="<% Eval('case_ID'); %>" />
</ItemTemplate>
</asp:FormView>
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Mar 21, 2010
I have a formview bound to a sqldatasource control. I want to set one of the insert parameters when I click on one of several buttons (outside the formview).
In my sqlDS I have:
<InsertParameters>
<asp:Parameter
Name="benType"
Type="byte"
/>
<asp:Parameter
Name="benName"
Type="String"
/>
<asp:Parameter
Name="benDesc"
Type="String"
/>
</InsertParameters>
I want to set the "benType" depending on which button I've pressed (I don't want/need it to be visible in the InsertTemplate). I tried adding this line to the codebehind for the button click:
formview1.ChangeMode(FormViewMode.Insert)
formview1_datasource.InsertParameters(0).DefaultValue = 2
This doesn't work...what is the best way to set the insertParameter from outside the formview?
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Dec 27, 2010
I have a very simple form that contains a FormView Control Bound with a SqlDataSource, The DefaultMode of the FormView control is "Insert". I noticed that when I run the page for the first time, the databinsing and databound events of the FormView Control occurs after the PreRender Event of the page ! I know very well the life cycle of a page, but I dont know when the data binding occurs in the life cycle of a page and if it can differ from a control to another.
Is there an article or a tutorial explaining all those things.
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Sep 3, 2010
So we use formviews all over the place that recently we've started putting user controls inside that have databinding controls inside them. In this instance it's a grid so
<formview>
<edititemtemplate>
<dynamiccontrol DataField="name" />
<customGrid DataField="addresses">
<columns>
<dynamiccontrol DataField="city" />
</columns>
</customGrid>
</edititemtemplate>
</formview>
That's the basic sitch. We have the customGrid, a usercontrol, bind to a collection on the main DataItem, and it contains dynamiccontrols (DD4) in its column templates so stuff in the cells displays right. (in reality, the customGrid is inside a dynamiccontrol like all the other fields here and is loaded based on ui hints, I've just stuck it in the pseudo-markup here for illustration). This works a charm, up until you try and update the formview. At that point, the FormView grabs all the keys from all the dynamiccontrols in its edititemtemplate, including keys and values from dynamiccontrols insde the customGrid control. Obviously this doesn't work as those are for an "address" object or something, and the formview is bound to a "person" object. What i desperately need is a way, inside customGrid, to stop FormView from getting out all the dynamiccontrol keys and values inside it. Overriding DataBindChildren doesn't work, nor DataBind. I don't know at what point or how the FormView queries its instantiated template for all the 2-way databinding controls it has inside it, but if I could get at that maybe I could figure something out. Or else, if I could make the customGrid stop sending back all the values inside it.
I tried overriding the formview's OnItemUpdating but that only so much; I can remove entries from the e.NewValues collection if they don't exist on the DataItem, but that doesn't if your custom sub control is binding items with fields of the same name as your main dataitem. There must be a way to abort this 2 way databinding in the custom control.
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Nov 15, 2010
I am trying to bind companyID value into a NavigateURL string property of a hyperlink which happens to be in the itemtemplate of the readonly formview control. Here is the code:
[Code]....
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Apr 20, 2010
I have a fairly simple form:
[code]....
However, once the update is finished (and I call e.Cancel = true), the LoginView control does not databind its children... so they are all blank. The FormView's viewstate is still fine, as all the rest of the controls outside of the LoginView appear fine. I even handle the FormView_DataBound event and a Trace shows that the FormView is being databound on postback.
Why then is the LoginView not keeping its ViewState/being databound? Here's a sample code snippet showing the flow:
[code]....
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Jul 21, 2010
since APS.Net 4.0 I have a curious problem with an event.
There is a FormView and inside of the EditItem there is a GridView. In the Footer of the GridView I put Controls for inserting records.
But when I fire a markup defined RowCommand of that GridView then the same event is getting fired for the Parent FormView. First I had 'Insert' as the CommandName and so I was getting the Error that my FormView had to be in insert mode to insert a record. Then I changed the RowCommand of the GridView to 'xxx' and I got also the RowCommand 'xxx' at the RowCommand eventhandler of the Parent FormView.
The project was migrated from .Net 3.5 a few days ago, but nothing was manually changed in the code/markup. And the problem was not there with the "old" framework.
[Code]....
Of course, I could simply change the CommanName of the LinkButton e.g. to 'InsertChild' but I would like to know:
Is this a known change or a bug of ASP.Net 4.0?
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Oct 15, 2010
I need to programmatically fill DropDownList in FormView and can't find the proper event to do it. I keep getting "'GenreList' has a SelectedValue which is invalid because it does not exist in the list of items" or "Bind, Eval can only be used in databound control" depending on the event. Sample code follows (there's no attempts to bind a DropDownList there ):
[Code]....
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May 4, 2010
I have a FormView with an EditTemplate.And the EditTemplate contains an ascx control:
<asp:FormView
ID="fvTicketUpdate"
runat="server"
[code]...
The contents of the ascx control has TextBox and DropDownList controls binding to the results of the FormView's ObjectDataSource through Text='<%# Eval("field1") %>'and SelectedValue='<%# Eval("field2") %>'.This works fine and I have been building all of my front end pieces like this as <asp:Panels> rendering as FieldSets that go 100% across the screen.And we call these areas "strips" accross the screen.But now I've run into a problem.One TextBox and one DropDown bind fine to a Ticket Object.But the DropDownList that works has its <asp:ListItems> hardcoded before hand.Now I have DropDownList that gets populated through a WebService in the ascx's
code behind like this:
public partial class UserControls_FormControls_PntipUpdtFaaInfo :
System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
[code]...
The Problem I think is the FormView is trying to do its Bind to the objectDataSource before its child ascx control is loaded in the Edit Template.And I am getting this error:
Databinding methods such as Eval(),XPath(),and Bind() can only be used in the context of a databound control.Meaning that the control must already be databound to bind the selectedValue to a Property of the TicketObject.Is there an easy way to force the order of loading to make the PntipUpdtFaaInfo control load and have its Page_Load execute and bind ddlEquip before the FormView does its first dataBind and executing its Evals?Otherwise I have to take out the eval on the ddlEquip SelectedValue attribute and go to the Parent Page and hack and force everything to happen when it needs to.This layout has worked out well for me.All of the ascx area strips across the screen share the same Validation Summary for example.It allows me to think about one section at a time and the Properties to the Business Obect and CRUD methods as I go.But this is a big brick wall I've hit.
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Apr 16, 2010
How can we programmatically select a row in GridView control based on the datakey.That means, I know the Primary key of the row which I want to select. So how would I select that particular row?P.S. I dont want to select it based on Index.
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Jan 27, 2010
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.).
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May 28, 2010
In my application i have a 'Result.aspx' page. In this page i have a dropdownlist which is acting as a master for a gridview. I want that when the user loads this page then the dropdownlist automatically has the value which user selected on another page and for this i am using querystring in the page load event as follows
ddlSelectCoupon.SelectedValue =Request.QueryString("partID")
I have set the autopostback of dropdownlist to True
My problem is if i am assigning the value to dropdownlist this way then my child gridview is not updating. Also, what is the best page event for assingning this value
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Jun 4, 2010
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."
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Aug 4, 2010
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.
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May 3, 2010
I 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.
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Nov 8, 2010
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?
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Dec 23, 2010
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?
[Code]....
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Jul 14, 2010
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.
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Feb 8, 2010
I am attempting to show/hide a control (txtInpatientType) when a user views individual records on a FormView (frmData) depending on the value stored in another control (txtPatientType). For example, if txtPatientType.Text = "Inpatient" then txtInpatientType.Visible needs to be True. Very simple code follows.
[Code]....
txtPatietType and txtInpatientType are both ReadOnly. txtInpatientType.Visible = false by default.
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Jun 15, 2010
I have a formview with an insert item template. I have added two dropdown controls that are databound to two different database tables to this insert template. However, when I click the 'InsertQuery' for the Accessdatasource neither of these controls are available as 'Parameter source options'.Out of interest, if I take these dropdown controls out of the formview and put them on the page they then become available to use.
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Sep 7, 2010
I have a calendar control where a user selects a date and then inputs info into a FormView control. Underneath the FormView is a GridView that shows all data from the SelectedDate on the calendar control. However, when the date is selected, all the information from the table ( from all dates ) is displayed.
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And the code behind:
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Apr 7, 2010
Im using Nested DataList in My Application. But i m not able to find control Inside Child DataList. (I want to Find Label Control In ItemDataBound Of ChildDataList)
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