Web Forms :: Change UserControl Display Before The Page Renders?
Jun 18, 2010
I have a requirement to hide certain buttons in a standard MOSS page. The buttons are generated by a Microsoft UserControl and some buttons must be hidden before displayed to the user. This page cannot be customized, so the only approach is to have an httpmodule which would use some Javascript and C# to hide the unwanted buttons. So my question is during which event should the javascript be used to pick out the DOM elements and set their visible property? Can anyone give a code example?
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Mar 1, 2010
I have a UserControl I created for Navigation that is added to a master page. In a host page, I have a drop down list that I would like to change the value of a dropdownlist in the user control when changed.
I've tried to use the findControl to get the Hyperlink control I'd like to change the value of, but it's always returning nothing. I am thinking this is because the control is nested in a master page. how I can change the value of this item based on the value of a dropdownlist in the aspx page?
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Jan 22, 2010
I have a page for webparts and have a usercontrol in the declarativecatalog. The user control had a gridview. I need to click (select) an item (row) in the gridview and change the selected value of the DDL in the parent (I guess this is the appropriate term) page.
<%@ Page Language="VB" MasterPageFile="~/MyStuff/MyStuff.master" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="MyStuff_Default" title="MyStuff" %>
[code]...
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Jun 8, 2010
I have alistview which Renders all images from the folder to display in the imageSlider but the Problem is in the javescript,i cannot rander all images and put it in the javascript, I wrote By hand One Image(id,description) on the javaScript so it displayed one image only i want to render all images ids and descriptions in the javascript which will be in the slider.data array
[Code]....
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Jul 23, 2010
I have on my Page a Label control and custom UserControl. I want that, when something appears in the UserControl, it shoud change e.g the Label's Text property (as I mentioned, the Label doesn't belong to the UserControl). How to do that ?
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Oct 27, 2010
My asp.net web app uses a master page which contains an 8k jpg of the company logo. Whenever I load a page or do a refresh, all of the non-master page html renders first, then the master page logo is shown, pushing all the html down a few lines. It's very annoying. Is there anything I can do to prevent that from happening?
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Oct 7, 2010
Old hand at ASP.NET, new to the UpdatePanel. I have a reporting page which executes a fairly length SQL query... takes about 10 seconds right now. What I would like to do is have my page fully render, with some placeholder text (Loading...) and then have the UpdatePanel kick off the actual time-consuming reporting process and render the report when it's done.
So... my theory is to use RegisterStartupScript() to kick this off and drop the string from GetPostBackEventReference() to trigger the UpdatePanel update. Some problems crop up:
1) Can I actually use GetPostBackEventReference w/ the UpdatePanel or do I need to trigger it some other way? Use this method on a button inside the Update Panel?
2) What event gets triggered when the postback reference is the UpdatePanel? It's not clear to me. I've got to call my databinding code somewhere! Again, maybe I need to use a button inside?
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Feb 23, 2011
I have a usercontrol which is used for search. Depending on which page the usercontrol is I have change the position of controls.
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Oct 3, 2012
I want to use same functionality in Ajax:Accordion. Looking for the code for this as well as instead of label in user control i want to bind the grid view.
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Aug 30, 2010
Is it possible to change the ascx file used by a usercontrol at runtime?
For example in my page i have
<ctl:SampleControl runat="server" />
in the web.config I have
<controls>
<add tagPrefix="ctl" tagName="SampleControl" src="~/UserControls/SampleControl.ascx" />
</controls>
At runtime I would like to be able to change the ascx to another path, it would still be inheriting from the same usercontrol codebehind, it would just be a different template.
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Oct 12, 2010
there's a label control on my master page..if its value is "Value1" ,I want this CSS Sprite to display on my webform..if the Value is "Value2"..the CSS sprite should use some different image..just the image needs to be changed ..nothing else in that Sprite..
I found out that I can use "FindControl" method to find out what value that Label Control of Master Page's currently got..
Now how do I change that image on the banner ?? How do I go about it ? Also that CSS Sprite now is a user control named "myBanner.ascx"(earlier was an aspx file)..Now do I need to make 2 diff usercontrols or I can implement some logic in one usercontrol itself ?
Should I make 2 copies of this "myBanner.ascx" with JUST the "image name" changed in its CSS ???
Hope its not confusing..Actually I am lost :/
What I want is ONE banner which has been made using CSS Sprite ..Now if the "Label Control's "value in the master page is "Value1" then the image to be used on that banner is "IMAGE1" else if "Label Control's" value is "Value2" then "IMAGE2" should be used in that sprite..
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May 13, 2010
i try to use userControl to display SqlDataReader data.
in the main page
public SqlDataReader Data2;
...
<uc1:WebUserControl ID="WebUserControl1" RData1="<%=Data2 %>" runat="server" />
and in the userControl
Repeater1.DataSource = RData1;
Repeater1.DataBind();........
But i keep getting this error
Cannot create an object of type 'System.Data.SqlClient.SqlDataReader' from its string representation '<%=Data2 %>' for the 'RData1' property.
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Oct 12, 2010
I added this code in my ascx file [URL]..When it was aspx file..the image(location is "Images" folder in my project now..was flickr earlier) would display alright..but when I made this page into a user control and added it in my webform, the image's vanished..I have tried changing the path many times but its not working..The user control is inside of "usercontrols" named folder..image inside of "images" named folder in my page and my aspx page's at root level only..so I changed the image path in the css of usercontrol as follows:-
background-image: url(../images/myImage.jpg);
even tried
background-image: url(../../images/myImage.jpg);
and this
background-image: url(~/images/myImage.jpg);
but the Sprite image just won't display
Everything else in the usercontrol is getting displayed well ..just that image's missing..whats wrong?
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Dec 6, 2012
In my repeater m using linkbutton for paging. I want javascript or code... My question is at run time when I am clicking on linkbutton its color get change... When I click on another button its color get reset...
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Mar 7, 2011
I try to run each control and then check what html did it render.
But this seems to me as an inaccurate method as whenever we add or remove the properties, or events of the control,the rendered HTML changes. Is there any book/tutorial/article to explain what is the standard HTML rendered by each asp.net control.
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Jul 20, 2010
The menu control when used on the newly released VS2010 with ASP.Net version 4.0 renders vertically briefly, then renders horizontally. This causes a 1/2 second annoying flash of the menu in vertical form before it disappears and renders horizontally as intended. If you choose to render the menu as a table this problem doesn't happen, but if you choose to render the menu as a list (using <ul><li>) then if happens every time, but is hidden on development systems where response is quick enough such that the rendering vertically is not visible to the naked eye. How can I cause the rendering to be horizontal (without the brief vertical rendering)?
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Jul 17, 2010
This is page load
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{ [code]...
But in my ascx.cs when IButton1_Click is trigered My name is null
private string _sname;
protected void Page_Load(object sender, EventArgs e)
{ [code]...
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Apr 6, 2010
im creating site with usercontrols. I have repeater, inside it is another repeater with usercontrol. My problem is passing BindedValue to usercontrol.Bindings works fine and binds the value i need but it cannot pass the value to usercontrol. When i type it manually it works, when i bind it, it passes null (!).I've tried get,set, functions (ondatabound, onload, oninit), accessing control from code with no luck. Ive read and tried to do all the google solutions but with no luck. (even with creating usercontrol inheritance)
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May 29, 2010
I have usercontrol, I have develop menu there like this
[Code]....
This user control i put several pages. When i goto that perticular page i want change background image of menu item which related to that page.
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Mar 31, 2010
What is the proper way to set the selectedvalue of a DDL inside a web user control? My current structure is PAGE > USERCONTROL [FORMVIEW] > USERCONTROL [DROPDOWNLIST]Inside my FORMVIEW user control, I am setting the value of my DROPDOWNLIST user control through an exposed property located within the DROPDOWNLIST user control, called SelectedLocation. However when I changeMode of the FORMVIEW control, depending on where I call my method to bind myROPDOWNLIST, it will either bind it twice or won't bind it all.
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Oct 27, 2010
i have some usercontrols in "~/Pages/"
my URL will be like ~/Default.aspx?p=Login or ~/Default.aspx?p=ContactUser
now i need to get the QueryString("p") and depend of that i want to load my UserControl To the Default.aspx Page
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Feb 16, 2010
I have a ListView bound to a database view (vw_Reunions). The Eval statements in the ItemTemplate render the data in vw_Reunions just fine but I have one in the LayoutTemplate that doesn't display. Can anyone tell me why?
[Code]....
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Sep 2, 2010
Ok, everyone knows that the z-index is messed up in IE8 and that requires patches or workarounds...
What I can't seem to find a solution to is the white background on the DynamicMenu parts of a Menu control. Setting the background color to transparent or not setting it all doesn't seem to have any effect. This is only a problem in IE8, Firefox 3.6.8 renders the dynamic menus without the white background.
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Sep 27, 2010
There are 2 UserControls UC1 and UC2, and there is one more class C. I want to share the same instance of c in both UserControls. I know that this can be possible with properties in both UC's and by registering UC2 in UC1 or vice versa. But I want the solution to be loosely coupled. Any best possible way without touching the Actual Page (which hosts UC's)? So i need some best possible way between UCs transfering C.
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Apr 20, 2010
I am developing a usercontrol, in this case a toolbar. Some of the buttons on the toolbar will interact with other objects on the page which are not part of the toolbar. (In this case a map) So the toolbar code behind wants to say something like this:
[code]....
My problem is that MyMap does not exist in the design environment of the usercontrol and therefore produces an error when it is referenced. So my question is, How is this typically handled? Can the usercontrol reference another control that does not exist within itself?
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