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.
How can I get the placement of dynamically added control in any page event.
View 6 RepliesConsider the following code, adding 2 textboxes with the same ID (oops):
protected void Page_Load(object sender, EventArgs e)
{
string TextBoxName = "TextBox1";
Panel p = new Panel();
TextBox t = new TextBox();
t.ID = TextBoxName;
p.Controls.Add(t);
if (p.FindControl(TextBoxName) == null) // <-------*******
{
TextBox t2 = new TextBox();
t2.ID = TextBoxName;
p.Controls.Add(t2);
}
Page.Form.Controls.Add(p);
}
The code is designed to stop adding the same ID twice. However, the Panel.FindControl() method is not finding a control that was added in the previous line of code.
Am I using this in the wrong way?
I mean - sure - I could manually iterate through the controls in the next level, like:
string TextBoxName = "TextBox1";
Panel p = new Panel();
TextBox t = new TextBox();
t.ID = TextBoxName;
p.Controls.Add(t);
TextBox t2 = new TextBox();
t2.ID = TextBoxName;
bool duplicateFound = false;
foreach( Control c in p.Controls )
{
if(c.ID == TextBoxName)
{
duplicateFound = true;
break;
}
}
if( duplicateFound )
{
t2.ID = TextBoxName + "__0";
p.Controls.Add(t2);
}
But I don't understand why this isn't working, whereas Placeholder controls and UserControls work fine.
The reason I am using Panels is for CSS styling. body > div > input - but still - it isn't working.
Im trying to find out how to use the web user control .ascx with the Aspx page..
Yes I do know how to create this and drag it into the aspx page...
But I want to go a step further ,...
I want to use a dropdownlist in the aspx page
Gridview in ascx thats databind in the ascx.vb file
...........then when selecting a value in the dropdownlist (in aspx)....it changes the sql query in the ascx file and show the new data in the user control..
I have tried to look for examples...everything I found was not making sense..poor explained and the codes where all in C#..so when converting it the examples dont even work..
been researching for whole day yesterday...cant find any codes thats working...:(
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.
I dymamically add checkBoxList to the page. How can I get checked items from it without adding it again?
View 7 RepliesCan a placeholder control be created dynamically such that you can add controls to it later on?
PlaceHolder ph_grid = new PlaceHolder();
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?
I have a Promote.aspx page which has a few radcomboboxes; radTerm and radOldYear. Promote.aspx also has a radgrid which is updatable by a WebUserControl, promote.ascx. This Web user control has a few radcomboboxes, radName and radNewyr.In the promote.ascx.cs, i want to be able to find the comoboxes which are on the promote.aspx. Tried using:
RadComboBox tl = (RadComboBox)this.Page.FindControl("radTerm");
in vain!find the controls on the main page. i am calling them thru thewebusercontrol that i load in the radgrid.
[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.
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...
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.
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]....
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 RepliesI 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
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.
I would like to write the following within a div (myGallerySet) from behind code (vb.net) on pageLoad:
<div id="gallery1" class="galleryElement"> <h2>Brugges 2006</h2> <div class="imageElement"> <h3>Item 1 Title</h3> <p>Item 1 Description</p> <a href="#" title="open image" class="open"></a> <img src="images/brugges2006/1.jpg" class="full" /> <img src="images/brugges2006/1-mini.jpg" class="thumbnail" /> </div> <div class="imageElement"> <h3>Item 2 Title</h3> <p>Item 2 Description</p>
<a href="#" title="open image" class="open"></a> <img src="images/brugges2006/2.jpg" class="full" /> <img src="images/brugges2006/2-mini.jpg" class="thumbnail" /> </div> </div> <div id="gallery2" class="galleryElement"> <h2>Stock Photos</h2> <div class="imageElement">
<h3>Item 1 Title</h3> <p>Item 1 Description</p> <a href="#" title="open image" class="open"></a> <img src="images/stock/77196_6784.jpg" class="full" alt="Item 1 Title"> <img src="images/stock/77196_6784_002.jpg" class="thumbnail" alt="thumbnail of Item 1 Title">
</div> <div class="imageElement"> <h3>Item 2 Title</h3> <p>Item 2 Description</p> <a href="#" title="open image" class="open"></a> <img src="images/stock/165392_5486.jpg" class="full" alt="Item 2 Title"> <img src="images/stock/165392_5486_002.jpg" class="thumbnail"
alt="thumbnail of Item 2 Title"> </div> </div>
Basically I have images details which are stored in a database and would need to dynamically added hence, why i need to write within a div container. Any ideas how I could achieve this?
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.
I've made a pag with a content div that has min-height set to 1200 pixels, and a black bacgkround color..
When I add a bunch of lines in the .aspx page (in html) , it works perfectly, it changes the black background height to the required height if it was more than 1200 pixels.
But, if I put a PlaceHolder in side the content div, and add a bunch of lines
dynamically to the PlaceHolder, it doesn't work, the page shows the content with background of 1200 pixels of height, and at the bottom of it no more content background, but continues showing the rest of the lines
outside of the content div..
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]....
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 RepliesI've created a bunch of asp:hiddenfields dynamically at runtime in an asp.net page.
My question is this:
How do I find those hidden fields?
I have an event attached to a control that fires a javascript function, and that's where I am attempting to use JQuery to find the hidden field associated with that control.
[Code]....
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]....
Dim objDatabase As New database
objDatabase.OpenSQLConnection()
Dim objAdapter As SqlDataAdapter
Dim objDataset As New DataSet
Dim objAdapter1 As SqlDataAdapter
Dim objDataset1 As New DataSet
Dim objAdapter2 As SqlDataAdapter
Dim objDataset2 As New DataSet
i am using above code to generate dynamicaly textbox into grid view. I have 3 fix coloumns from database which i fetch at start of code.
Then i assigned it to datatable. in datatable according to Listbox item count i added more coloumn as per listbox items count.
then that datatable i i gave as datasourse to gridview. Now i inserted dynamicaly textbox to gridview in respective coloumn.
But after refreshing page all textboxes disappears....
.aspx:
<input type="file" id="file1" name="file1"/>
now i want to call the file control in .aspx.vb page. how can we call this..