In my one asp.net web page by VS 2008 I dynamically creates a set of RadioButtonList and TextBox by objects
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The current issue is I can load the web page with a set of RadioButtonLists and TextBoxs but can't find the these dynamically built controls by Me.FindControl("rdoTask" & ID) in aspx.vb file to save info assigned to these controls.
I have an asp:table control that I construct dynamically. I place a few textboxes in it within a for loop and assign their IDs in code. I'll include an abbreviated code fragment showing how I'm doing this:
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The page then displays correctly and the ID is set correctly when I view the source, but when I try to access the textbox later when the form is submitted the call to FindControl(idStr) returns null no matter what I do.
I have a Placeholder control on Employee Main Menu. Several SQL Data sources are run at page load in order to notify employees that something is due. Each "something is due" message is loaded into a unique label. Therefore the Placeholder could have several labels in them. For clarity's sake I'd like them separated by line breaks. However I understand from reading a previous forum item that "< /br>" are ignored. How can I embed a line break when PlaceHolder_Msg.Controls.Count > 1
View 2 RepliesI have a web page "Survey.aspx"
This page is in a MasterPage.
In survey.aspx, I put a PlaceHolder.
In this place holder, I dynamically add a usercontrol (for each question in a survey). That usercontrol for now is just a simple Panel with a radiobutton. For the test, I have 2 questions, so the usercontrol will be inserted 2 times in my PlaceHolder.
On a submit button added in my Survey page, I try to retrieve the value of both the radio, but I just cant find the control.
I made a recursive function to loop through all the controls, I find the "PlaceHolder1" controls, but it has no child controls. Where are the 2 panels for each questions .. both containing 1 radio.
I see them on screen, but just can't find them in my coding.
This is my Survey.aspx layout code
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This is my usercontrol layout code
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I want to make a webpage where i used a Linkbutton link for share something into an ascx page. i have called this ascx control into some webPage(aspx).
But into that ascx page i have called another ascx control to open that page as a pop into ascx page It will be displayed into aspx.
1. first ascx control display some folder to share .
2. second ascx called into first ascx to popup the friendlist(I have used ajax DragPanelExtender inside it a Datalist with check box.) for it
3. I have to show this all to share with all friends (in aspx page) likie face book share
I want to do this how can i hide and display the second ascx control into first ascx control .
By default registered control is hide. when i click to link button share it got visible but there is one button cancel on the second ascx how to hide this into first control into that hide button click.?
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I Have a webpage suppose ParentPage.aspx which contains a iframe. Under iframe i am calling another webpage Childpage.aspx . Now i want to access ParentPage controls from ChildPage and change the property of that control.
how it is possible ?
Below i am writing a code which i am trying. In this code Page.PreviousPage is always null .
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i have a gridview control i added checkbox contrl dynamically but i am not getiing the reference of checkbox in button clilck event here is my code Gridvew
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.vb code
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how to load user control dynamically on asp.net page? I am loading user control in my page_Init() event under if(!IsPostBack) but when user post the with any button click then my user control is disapper?
If i am loading control without if(!IsPostBAck) then its fine, but each time a page is posted loading of control is not good because it will slow my web site?
I have developed a web application (ASP.NET Web Forms). One of my customer has very restrictive policies. When he accesses the web page, IE shows this message:
Your security settings do not allow Web sites to use ActiveX controls installed on your computer. This page may not display correctly.
As far as I know, we don't use ActiveX controls on our page. I did a "View > Souce" and did not find anything suspect.
How can I find what part of my page refers to an ActiveX. The application uses jQuery and a few jQuery plug-ins. Is there a tool/add-in like "Fire Bug" that I can use to list the ActiveX controls referred on a page?
reading on the forums about assigning event handlers to controls that are dynamically created via code and am just not getting anywhere.In my particular case, I'm rolling through a directory of images and creating ImageButton controls on the fly and want to assign the OnCommand event to a single handler.Then, by using the CommandName (which is different for each control) I can figure out which ImageButton was clicked and act accordingly.
The snippet below (which can be found in many posts on this topic) is inside a foreach which loops through the directory and gets each FileInfo (fi).Each is then added to a PlaceHolder (phImages).
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This code compiles and runs but the event handler is never invoked when an ImageButton is clicked. I believe this is because you cannot, without some coding I'm not familiar enough to do yet, assign a handler to multiple controls.I say this because I ran into a similar problem in a Silverlight app I wrote and had to use a lambda (=>) operator to do something similar (although I admit to not knowing enough about this to know if this situation is the same).
How to load a user control dynamically in a page?
I have a page that contains radioButtons. Each click on a radio button loads a user control (.ascx) in the page.
What I am doing is loading all controls at the same time, but set their visibility to false. When a user clicks a radiobutton I set the visibility of the specific user control to true.
As a result I am loading all the user controls on each postback.
I have a Gridview that I am trying to add Paging to, however when the 2nd page is selected I get my EmptyDataText.n reviewing multiple sites and forums they have stated to send your Datatable to a Session - What am I missing here?
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I have the following code, i add code for required validator, but when you make selection from dropdown to create the table, the page generates an error. Should the logic be somewhere else to add it to the table? i mean, dont they have to be there so when you submit the form, it fires the validation?
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Here is the error that comes up, when i make a selection from my dropdown that creates the table.
Line: 938
Error: Sys.WebForms.PageRequestManagerServerErrorException: Control 'rfvtxtCam1' referenced by the ControlToValidate property of 'rfvtxtCam1' cannot be validated.
i am building my objectdatasource dynmically when certain buttons are clicked on the page.. and with that the gridview is being displayed with the results of the objectdatasource that was built.
So my gridview code looks like this:
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How can i enable sorting and paging if the datasource is being built on button click event?
I have a PlaceHolder control inside of a ListView that I am using to render controls from my code behind. The code below adds the controls:
TextBox tb = new TextBox();
tb.Text = quest.Value;
tb.ID = quest.ShortName.Replace(" ", "");
((PlaceHolder)e.Item.FindControl("ph_QuestionInput")).Controls.Add(tb);
I am using the following code to retrieve the values that have been entered into the TextBox:
foreach (ListViewDataItem di in lv_Questions.Items)
{
int QuestionId = Convert.ToInt32(((HiddenField)di.FindControl("hf_QuestionId")).Value);
Question quest = dc.Questions.Single(q => q.QuestionId == QuestionId);
TextBox tb = ((TextBox)di.FindControl(quest.ShortName.Replace(" ","")));
//tb is always null!
}
But it never finds the control. I've looked at the source code for the page and the control i want has the id:
ctl00_cphContentMiddle_lv_Questions_ctrl0_Numberofacres
For some reason when I look at the controls in the ListViewDataItem it has the ClientID:
ctl00_cphContentMiddle_lv_Questions_ctrl0_ctl00
Why would it be changing Numberofacres to ctl00? Is there any way to work around this?
UPDATE:
Just to clarify, I am databinding my ListView in the Page_Init event. I then create the controls in the ItemBound event for my ListView. But based on what @Womp and MSDN are saying the controls won't actually be created until after the Load event (which is after the Page_Init event) and therefore are not in ViewState? Does this sound correct?
If so am I just SOL when it comes to retrieving the values in my dynamic controls from my OnClick event?
UPDATE 2:
So i changed the code i had in my Page_Init event from:
protected void Page_Init(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
//databind lv_Questions
}
}
to:
protected void Page_Init(object sender, EventArgs e)
{
//databind lv_Questions
}
And it fixed my problem. Still a little confused as to why I want to databind regardless of whether it's a postback or not but the issue is resolved.
I have the following on my aspx page
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Then in my code behind i have the following set up in 4+ button events, since each button serves a different purpose.. Prior to this past week, i was only working with 2 gridviews on the page.. that were linked to this datasource.. so everything was fine.. but recently had to add a Datalist to display the results a certain way.. I got it all working, but now that more records are in the table the datalist is growing in length on the page and cant figure out how to modify the current code to enable paging without having to redesign the logic all together to get it enabled.
Based on what i have below and above, is there a solution i can implement to implement paging ONLY for the Datalist? Or if it cant be specific, if enabled, will it affect the gridview that is already configured to enable paging, which already works?
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I'm running into a weird issue that I can't find an answer for anywhere I've looked (and I've looked a ton).I built a web deployment project with Visual Studio 2008 Team System on my old Win XP machine. This has always worked flawlessly and installed everywhere. I can also copy this MSI to my new Windows 7 Ultimate machine and it again installs just fine.
HOWEVER, when I rebuild that exact same web deployment project on my new Win7 machine, also using VS2008, the MSI will build OK, but when I then run it to install my software I get a dialog box telling me "the installer was interrupted." Interestingly, when I built this MSI in my new environment one additional warning popped up during the build process, which was "Unable to copy the schema file '(null)'"After many searches and reading different web pages, I know this has to do with these two registry keys:
[HKEY_LOCAL_MACHINESOFTWAREMicrosoftVisualStudio9.0DeploymentSchema]
"DefaultMSISchemaFile"="c:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\Deployment\Vspkgs\..\VsdSchema\Schema.msi"
"DefaultMSMSchemaFile"="c:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\Deployment\Vspkgs\..\VsdSchema\Schema.msm"
Yet, everything checks out. All permissions are correctly configured, etc., etc.Then, when I enable the built-in administrator account and log in as that, and then rebuild this same web deployment MSI the "Unable to copy the schema file '(null)'" warning no longer appears. Then when I log back out, log back in as myself and then run this newly built MSI it installs fine, just like the original one that was built on XP.I also tried uninstalling VS2008 and re-installing it as the super user, but that also didn't change anything. And yes, I did also configure devenv.exe to run as administrator.
Has anybody seen this? Or is it a requirement that you can only compile deployment projects as the super user? That cannot be right.I've been thrashing for more than five days and for the life of me cannot figure this out. Of course, I can run as the super user when developing, but I thought the new security model in Win7 was designed exactly so you don't have to.
I was attempting to use a gridview, but found that it was a little to restrictive in terms of formatting. So I'm using a DataReader and a StringBuilder (using the Append method to attach to the Literal control) to build a form. The form is pretty simple: labels, radio buttons, and textboxes. The appended data was practically taken from a classic asp page (with just some minor tweeking). For the most part there will always be 5 records on the form to loop through and save (sometimes less...never more).
Now comes the tricky part. I want to save the information on my form, but I'm not sure how to proceed. Do I use the Append method to add a save button to my form. And if so, how do I save the data (I couldn't use the codebehind could I)? Do I use an asp:Button and if so, will it recognize the form since it was build dynammically?
I have a table control that I am building dynamically and inside one cell I am placing a LinkButton inside it and wiring up an event. Although the event for the LInkButton never fires.
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I have a dialogue window that contains an Accordion Control that is dynamically built. The only thing that appears on my source page is the opening and closing tags for the control. The panes and the controls that appear on the panes are all added dynamically based on records in a database.
Now here is my situation, if a certian action is performed on one of the controls then I want to save that controls data and make it no longer available for use, this was easily accomplished by having the control hide itself. An issue arises though when I have hidden all of the controls on a certain pane, the header for the pane still exists and this is not the desired result.
What I would like is to be able to dynamically remove the entire contents of the control and then re-build it. Due to the timing of the events in the page post back sequence, a simple call to the method that builds the control will not work and if an explanation is required I will provide one. Also, looping through all of the panes and the controls on each pane will not work since after the first pass through the loop the panes collection is mutated, the enum table for the control is no longer correct since the initial pane has been removed, as a result the for loop throws an error.
Can any one come up with a way that I can clear out the control, keeping only the basic empty structure, and re-build it all in a single post to the server?
I want to change the text of the user name text box which is inside a log in view on selected index chaged event of a drop down list.
this is my code:
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but both ddl and tb are null
Anyone knows how can I find the controls in code behind?
I built a user control that displays a drop down list of states. I'm using it, but if I try to put it in a listview control, all I get is the frop down with nothing in it.
View 3 RepliesI've never had to dynamically change the head of a webpage before and can't quite seem to get it. As mentioned in the title, the webpage is the child of a very simple master page. Here's what i've got:
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I've tried :
Ctype(Me.Header.FindControl("head"), ContentPlaceHolder).InnerHtml
+= "<script type = 'text/javascript' src='" & Me.Master.get_root_rel() & "Sections/SectionJSFiles/EditFunctions.js' /></script>"
as well as
Me.Master.Head.InnerHtml += (same as above)
What I am trying to do here is I want to add the dynamically created labels in the Panel on the Webpage and not directly on the Webpage. My panel has scroll bars and thus when I scroll horizontally or vertically only the background moves whereas the labels are static to the page. And some labels are even visible on the panel borders on scrollbars (some on the page outside the panel) which are suppose to be placed inside the Panel. So when I scroll either of the ways even the labels should move along with the background image. So how can I make these labels stick to the Panel and not the Page? How do I do it?
View 3 Repliesi create textbox dynamically (not in page_load)
for example
dim t as new textbox
t.text ="wywyr"
t.id="wrytwry"
panel1.controls.add(t)
after that when i want to get the value from this one i cant.
i searched all the controls that i add into panel1
For
Each Control
In panel1.Controls
Dim s
As
String = Control.GetType.ToString
and it doesnt show nothing
how do i get the value from the dynamically generated textbox ?