C# - Accessing Data From A Dynamically Added Custom Control?

Jan 28, 2010

I am writing a survey generating system in asp.net. i asked an ealier question about the best way to create controls that can be passed about as variables. This was problematic with user controls so i was advised to use custom controls and a quick way to do this was to inherit from the panel control and just add a bunch of standard controls the the controls collection by overriding the CreateChildControls method. This way i could create my "survey" controls,which are basically Questions in the survey. THe question controls are then dynamically added to the page. This all works well but know i have come to the point that i want to try and retrieve the values from these controls and i seem to be lost in a nether world of of viewstates and page lifecycles. I can ensure that the dynamically added text boxes have a known ID, however even if i add the parent control in the page init handler the CreateChildControls method does not run until after until after the viewstate is loaded. I cannot work out how to retreive the values from these text boxes.

View 2 Replies


Similar Messages:

C# - Accessing A Control Dynamically Added To A Placeholder During An Event

Mar 30, 2011

I'm creating an ASP.NET control dynamically based on a value selected in a dropdown; for instance the field can be a textbox or a checkbox (for now), and then it gets added to a placeholder control. However, I'm unsure how to retrieve the value - using the placeholder's FindControl method returns null although I'm specifying the ID when I create the control.

Here's my code:

[code]....

View 2 Replies

Custom Server Controls :: Composite User Control Cannot Be Added To TableRow Dynamically

Jan 21, 2011

I have a composite user control consisting of three standard table cells (a legend, an image with a tool tip, and a text field control). If I add these to a TableRow in my aspx page it works fine and produces legal HTML in my source. The below works fine ...

<tr><MyControl:dataField
ID="txtEmail"
DataType="Email"
runat="server"
/></tr>

However when I try to do the same programmatically (C#) the TableRow won't accept anything in its Controls collection that isn't a TableCell. I could make my control a nested table in its own right but I lose the alignment of my form items on the page with multiple controls, as each table aligns itself according to its contents. Is there anyway I can make the TableRow accept my control as collection of cells or do I need to do some casting or making my user control inherit some kind of TableCell attributes? I can also dynamically add my controls to a TableCell item which actually displays OK in IE but creates illegal HTML (<td><td></td><td> ... </td></td> - I assume this is illegal) in my resulting source. The code below DOES NOT work ...

[Code]....

View 4 Replies

Forms Data Controls :: Datagridview Control With Dynamically Added BoundField Columns?

Jun 2, 2010

I am having datagridview control with dynamically added BoundField columns.I want to have tetxboxes in each cell of the gridview so taht user will enter data in gridview textboxes and at last on button click it will be saved in database.

View 14 Replies

Custom Server Controls :: Usercontrol Lose All Its Properties When Dynamically Added By Code

Jan 10, 2011

when I add a custom usercontrol by code like this:

[Code]....

the compiler doesn't accept it at all...

how to access "custom usercontrol's properties" while the usercontrol itsef has been added programaticly by code.

View 9 Replies

Accessing Property Value Of A Custom Control By Another Custom Control In Design-time

Oct 18, 2010

I created an Extender which has a custom property that drills down a list XML elements from an xml file, where users can select xml elements during design-time. This works perfectly fine. However, my code only has a hardcoded xml filename (source of the xml elements list) and I need to change this by maxing the xml file user-specified.

What I did is that I created another control (panel) which has a custom property that when clicked (through the ellipsis), it will allow a developer to select the xml file which is supposed to be the source xml file that the Extenders shall use. The filedialog from custom panel's property works perfectly fine.

However, my problem now is that when I drag-drop my Extender, I cannot find a way to get the property value of the custom Panel Control which contains the xml filename. I tried creating a static variable which I thought the custom controls can share but VS2010 is breaking.

View 4 Replies

Get Id Of Dynamically Added Control?

Jan 29, 2010

i have one html table "table "and added controls it at run time as :

HtmlTableRow tabelrow = new HtmlTableRow();
HtmlTableCell tablecell = new HtmlTableCell();
Label lbl = new Label();
tablecell.Controls.Add(lbl);

then i want to get each controls by using foreach

such as (foreach control c in table.controls) or (foreach control c in tablecell.controls)but its not working.

View 1 Replies

Web Forms :: Getting State Of Dynamically Added Control?

Feb 8, 2010

I dymamically add checkBoxList to the page. How can I get checked items from it without adding it again?

View 7 Replies

Web Forms :: Can Placeholder Control Be Added Dynamically

Jun 5, 2010

Can a placeholder control be created dynamically such that you can add controls to it later on?

PlaceHolder ph_grid = new PlaceHolder();

View 9 Replies

Jquery - Validate Dynamically Added Control?

Mar 29, 2011

How can I add the dynamically added control to validation?

[Code]...

the client-side validations kicks-in. Is there a way to explicitly include the deferredly-created inputs to validations?

View 1 Replies

Web Forms :: Dynamically Added Control Doesn't Persist Value

Aug 5, 2010

[Code]....

I know that if I re-add the control during Page_Load, the posted values will be repopulated when the page is rendered; however, this is not the case when re-adding the control during the Click event and I need to add the control during an event handler.

View 1 Replies

Web Forms :: Event Not Firing On Dynamically Added Control

Feb 23, 2011

While I am using a "Telerik" control here it shouldn't be any different I guess;

[code]....

What happens is that the control is created and rendered;

When I change value in the Combo box a Post-Back happens.

HOWEVER, the event RadComboBoxSelectedIndexChanged does not fire. Also when I am back at the page the new value is not saved; Obviously, i recreate the control every time. If I don't I get a ViewState error. Seems to me that there some ViewState management problem, but I cannot identify it...

View 2 Replies

User Control's Elements Not Getting Initialised When Added Dynamically?

Jun 30, 2010

I've got a custom ASP.Net web user control I've built; done this enough times before but this one is misbehaving and I can't spot why.

Where the calling page includes the user control directly in its markup, all is well and the control behaves as expected.

However if the page adds this particular control dynamically (to a placeholder in the master page, which is what's calling this whole thing) the elements within it stay firmly NULL - nothing from the user control gets written to the client at all, including static content within the user control.

View 3 Replies

Event Handling For A Dynamically Added User Control?

Apr 26, 2010

I have a user control say SearchVendor.ascx which contains 4 buttons a gridview and another user control. I need to load the control dynamically actually as a modal pop up

I get this code

var uc = Page.LoadControl("~/blah/VendorProductSearch.ascx") as VPSearch;
uc.ShowVPSearch(true);
_tempPlaceHolder.Controls.Add(uc);

it works fine the control gets loaded properly but onclick of any button the second time the control disappears ?

I want the dynamically added control to remain until the user clicks on the cancel button

View 2 Replies

C# - How To Execute Javascript In A Dynamically-added User Control

Jan 30, 2010

I have a GridView of thumbnail photos within an UpdatePanel, with clickable icons in each row which each load a User Control containing a small Google Map into the relevant row. The idea is that the user can geotag (by clicking on the map) any photo in the GridView.

In the map User Control, there is some Javascript initialising the map:

function initializeMap() {
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById('Map'), {size: new
GSize(336, 200)});
// set the map controls, set the centre, etc.
}
}

Problem is: I don't know how to call the initializeMap() method. Because it's dynamically added to the page, any attempt to link it to the calling button by "onClientClick=initializeMap()" for example, gives a JS error, saying the method isn't defined.

I've tried

ClientScript.RegisterStartupScript(this.GetType(), "initializeMap", "<script type="text/javascript">alert('Here'); initializeMap();</script>");

but I don't think I'm on the right track with that one either.

View 1 Replies

Finding A Dynamically Added Control On An Aspx Page?

Dec 14, 2010

I have an asp page "A" and I've created a user control "B"

When I do A.Controls.Add(B), I would like to make an element, say a TableRow which is defined inside control "B", invisible via code behind.

When looking through Controls of "A", I cannot seem to find that table row.

View 3 Replies

Web Forms ::dynamically Added Control In Any Page Event?

Jul 23, 2010

How can I get the placement of dynamically added control in any page event.

View 6 Replies

C# - Assign Delegate Event Handler From Dynamically Added Child Control

Apr 14, 2010

I have a control that handles commenting. In this control, I have set a delegate event handler for sending an email.

I then have various types of controls, e.g. blog, articles etc, each of which may or may not have the commenting control added (which is done dynamically with me not knowing the id's), i.e. the commenting control is added outside this control. Each of these controls handles it's emailing differently(hence the event).

What I'm trying to determine, is how to assign the event in the parent control. At the moment, I'm having to recursively search through all the controls on the page until I find the comment control, and set it that way. Example below explains:

COMMENTING CONTROL

public delegate void Commenting_OnSendEmail();
public partial class Commenting : UserControl
{
public Commenting_OnSendEmail OnComment_SendEmail();
private void Page_Load(object sender, EventArgs e)
{
if(OnComment_SendEmail != null)
{
OnComment_SendEmail();
}
}
}

PARENT CONTROL

public partial class Blog : UserControl
{
private void Page_Load(object sender, EventArgs e)
{
Commenting comControl = (Commenting)this.FindControl<Commenting>(this);
if(comControl != null)
{
comCtrol.OnComment_SendEmail += new Commenting_OnSendMail(Blog_Comment_OnSendEmail);
}
}
}

EDIT:

The reason I ask is that if I search from this.Page as the initial control, I am worried about time taken to search down the control tree to find it. Each different type of page would be different in how many control it would have. On some testing, it returns back quite quickly the result.

View 1 Replies

C# - Accessing Control Created Dynamically In Code Behind?

Jul 29, 2010

i have a link button which i have created dynamically and added it to a div i want to access this link button in some other function in code behind how to do this

View 3 Replies

State Management :: How To Make An Image Control (dynamically Added To A GridView Column In It's RowDataBound Event)

Mar 28, 2010

I have a gridview that on it's RowDataBound event I dynamically add Image Controls to some columns.

The problem is that I lose these images on the next PostBack.

OBS: The GridView's EnableViewState propertie is already set to true

I know about the page lifecycle, but how can I persist these images if I have to add them on the RowDataBound event?

In addittion, if I add a static TemplateColumn with an Image Control and I set it's ImageUrl propertie inside the RowDataBound event it will obviously persist between postbacks. The problem is that I don't know how many columns with images I'll have, it's defined on the datasource.

[Code]....

View 8 Replies

Accessing ToolKitScriptManager/ScriptManager From Custom Control?

Aug 7, 2010

I'm writing a custom class library that contains custom controls (not user controls).I have some embedded javascript files that need to be registered on the page.Now since this is a class library, how do I detect whether or not to use a ToolKitScriptManager or ScriptManager?Page.ClientScript is a ClientScriptManager, but would I do if the page has the new ToolKitScriptManager?

View 1 Replies

Accessing Value From The Controls Within A Dynamically Loaded Web User Control?

Jul 31, 2010

I have created a web user control (MemberDetails.ascx) which is loaded dynamically on a page (Member.aspx) for my website. The control has some TextBoxes. I want to store the values inputted by a user in these TextBoxes to a database on the click event of a button that is on the Member.aspx page (i.e. not a part of user control).

I'll use a small code for example.

Member.ascx page:

[Code]....

View 1 Replies

Custom Server Controls :: Persist Data In A Dynamically Populated ListBox In A User Control

Aug 19, 2010

I am trying to persist data in a dynamically populated ListBox in a user control. Here are the details

I have a user control which contains a a listBox and button. On Page_Load of user control I am populating the ListBox control with some values. On Click of button, I am trying to fetch the values which I have selected in ListBox. Though this seems very simple and straight forward I am unable to fetch values.

My Page_Load Function

void Page_Load(object sender, EventArgs e)
{
If(!IspostBack)
{
listBox.items.Add("Item1");
listBox.items.Add("item2");
listBox.items.Add("item3");
}
}

My Click Function

Protected Void Button1_Click(object sender, EventArgs e)
{
string strValue = listBox.SelectedValue
}

I have placed brake point at Page_Load and on click function, I am seeing that the moment the breakpoint hits Page_Load function (before If (!Ispostback)) , listBox.SelectedIndex is becoming -1.

One more thing here is, I am placing this user control in an SharePoint application page to be specific checkin.aspx page . ( I know this should not be done, but that is the requirement for me)

View 5 Replies

Web Forms :: Accessing Custom WebPart Control Using HTML Browser DOM

Jun 10, 2010

does anyone know how to access a webpart using the HTML Document Object Model? for example: for a given page which contains a webpart manager and a webpartzone.

[Code]....

I cant access the custom control using the HTML DOM Like this: HtmlDocument doc = HtmlPage.Document;
HtmlElement element = doc.GetElementById("HostTest");
HtmlElement element1 = doc.GetElementById("silverlightControlHost");
HtmlElement element2 = doc.GetElementById("WebPartZone3");
HtmlElement element2Parent = element2.Parent;
HtmlElement element3 = doc.GetElementById("SLRoomConsumerPart1"); //element3 does not return anything at all just Null!

all of the other elements are returned except for element 3 which returns a null! Any controls (regardless if it is a custom control, ASP control, Usercontrol . i tried it by replaceing the custome control with an aspnet button. i go t a null value as well) placed in the <ZoneTemplate> Tag of the <WebpartZone> is not returned using the HTML DOM. I find this stupid and pointless, as the whole point of a webPart is that you can place all sorts of controls in it :
customcontrols, usercontrols html controls, html server controls, aspnet controls and you cant seem to get access to those controls using the HTML DOM model in codeBehind
<asp:WebPartZone ID="WebPartZone3" runat="server" Height="90%" Width="
<ZoneTemplate>
<cc1:SLRoomConsumerPart ID="SLRoomConsumerPart1" runat="server" />
</ZoneTemplate>
</asp:WebPartZone>
HtmlDocument doc = HtmlPage.Document;
HtmlElement my_WeBpart_Element = doc.GetElementbyId("myCustomWebPartControl1")
can anyone point me to a solution or a work around as i am trying to access the dom from silverlight 3 but should be exactly the same as doing it from the webpart'shosting page's code behind. so that i can reference the controls inside my web part from the code behind of the custom page once i get hold of the webPart Element referece.

View 6 Replies

Custom Server Controls :: Accessing User Control Over Multiple Projects?

Dec 10, 2010

I have a piece of code that is just HTML. It was previously created as a user control. Within the application i'm working with there are two seperate websites that are interlinked to make one website. There is a documents section where users do not need to login and a data section where users need to login. The design was implemented long before I was hired. My problem is I want to use the code from the documents website with the data website but I can't seem to register the control. I only one this piece of code in one place so when it is updated it doesn't have to be in multiple places. I tried setting "src=http://website/doc/doc.ascx" but this errors out saying

<%@ Register Src="http://website/doc/doc.ascx" TagName="docs" TagPrefix="temp" %>

Parser Error Message: The file '/documents/http://website/doc/doc.ascx' does not exist.

It adds the directory as part of the src. How can I have it point to this location http://website/doc/doc.ascx ?

View 7 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved