Web Forms :: Referencing Host Page Controls From User Control?
Feb 14, 2011
I want to use a dropdownlist control as paging options (50, 100, 150, 200) for a GridView control so I can reuse the user control on other pages that uses paging.The dropdownlist control will be in the user control page and the GridView will be on the host page. How do I reference the GridView control generically from the dropdownlist in the user control to set the PageSize property of the GridView control upon selecting one of the dropdownlist options. Any advice and if there are other means to accomplish such tasks to allow reusability.
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Oct 5, 2010
I have the following code which at the moment sits in a number of pages:
[Code]....
It sits in the page because I reference the usercontrol type 'emailSignUp' and pass data to an exposed variable 'DisplayType'. The control is located in the pages master page. Ideally what i'd like to do is put this in its own class or something, so I can just call it passing the configuration variable, but I'm unsure how this would work -
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Dec 9, 2010
I have a dropdownlist in a user control and i want to perform different functions on the basis of the host page that hosts this user control when the selected index of the dropdownlist changes e.g. when the host page is locations i want the event to load locations for the selected item in the dropdown, when the hosting page is services i want to load services for the selected item in the dropdown. What is the best possible way to achieve this scenario.
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Feb 18, 2010
I thought this would be easy but i cant find what i am looking for online
I have 2 pages, the first 1 has a button that opens another page. On this 2nd page the user selects a picture. When the user selects a picture the form closes. When they select a picture i want the image control on the first page to change.
I'm not sure how to do this, i guess i could set the image path as a session variable and reload the first page but again i'm faced with the problem of how to reference the first page from the 2nd
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Aug 30, 2010
I'm trying to reference a string from the web.config file from a ASCX user control, but I get the error message: [b]Compiler Error Message: BC30203: Identifier expected.
My code in the user control file is as follows:
<div id="header">
<h1><%= Server.HtmlEncode(Convert.ToString(ConfigurationSettings.AppSettings["Web_Title"])) %></h1>
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Do I need to import any namespaces?
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Nov 2, 2010
I have a label control on my MasterPage that is used to display error information. If an error occurs on another aspx page or a Module.vb page, how can I display the exception in the label control on my MasterPage? I tried using a Session variable, however, it would not work in my Module.vb code-behind file.
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Dec 3, 2010
I have a Data list, inside that i have a repeater, inside the repeater i have a panel.hat i want to do is reference my panel (Panel1) so that i can change the visible properties when a link button is clicked. However as this is inside a dynamic control i am a bit lost in how to reference it! This is my code
[Code]....
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Feb 27, 2011
I would like to know how to reference the asp.net text field which is in the EditItemTemplate tag of a DetailsView control to load the JQuery DatePicker when clicked in the JQuery script. Following are the code that I have, but it throws the error :
The name 'txtDateOfBirth' does not exist in the current context
JQuery at the header of the page:
[Code]....
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Jan 3, 2011
I am using a CustomValidator to compare two textbox control values in the form view. These values are not required but must be compared if a valuue is entered. The same two controls are defined in both Edit Item Template and Insert Item Template. The formview default mode is Edit.
The javascipt for the custom validator works when in Edit mode. However, when the form view is Insert, the javascript throws an error of NullReferenceException. how I can adjust my code so that the client-side javascript works for both Edit and Insert mode?
The form view is in a content page. The script is in the Head content placeholder
<script type="text/javascript">
<!--
function cvSecondaryEmail_Validate(source, args)
{
[Code].....
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Feb 15, 2011
I have an imagebutton control in the column HeaderTemplate of a gridview and want to know how to reference the imagebutton so I can add an attribute to it programmatically. Following is the code for my gridview control:
[Code]....
I can reference the checkbox control correctly with CheckBox chkbox = GridView1.FindControl("chkSelected") as CheckBox;However, I have tried the following code for the imagebutton but I get the error message Object reference not set to an instance of an object.:
[Code]....
Or is the OnInit event handler the right place to reference the control?
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Feb 16, 2011
How to I reference say a text box from my code back file? I am having issues with trying to execute an sql query from the click of a button and then place the result into that text box...
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Mar 22, 2011
i would like to ask about how can i open user control page when i click a button on parent page, also, can i call parent's method from user control page and then refresh parent page?
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Sep 10, 2010
I've got a web site that has a master page and that master page (mpMaster that has a user control ucControl1) which has a sub user control (ucControl2), this user control has a property which accepts a value. Now, I have a page that uses the master page
and on this page I have another user control (ucPageControl), I need to find a way of setting the value in ucControl2 from ucPageControl. Is this possible at all?
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May 15, 2010
My Question is related to access the rows in one page and putting conditions in another page.I need to check whether a datagrid has row in it or not. DataGrid is in .aspx page. Based on this checking i need to write a condition in .ascx page.the .ascx on which condition is checked is linked to .aspx page. Meaning that UserControl1.ascx is Register with Default.aspx pageI am using VS 2003let me know if any input is needed from my side.
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Aug 28, 2010
In ASP control such as LinkButton, is it possible to have the URL http://xyz.com that is used in the
OnClientClick = "window.open('http://xyz.com', '',.....)" be referenced from the Web.Config file ?
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Nov 10, 2010
I have created a class within the App_Code called shared_methods.vb where I use methods that are frequently used within several pages.
I have a hyperlink control within the masterpage that i want to change the NavigateUrl depedning on what page. Just for better coding i would like to define the variable holding the hyperlink with my shared_method.vb.
I have:
Dim hl_back As HyperLink = CType(Master.FindControl("hl_master_back"), HyperLink)
This works within a page but not within shared_methods.
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Nov 14, 2010
I have a series of dynamic controls that I'm adding to a page. These are listboxes.
I am adding a handler dynamically e.g. AddHandler listboxname.SelectedIndexChanged, AddressOf listboxSelectedChanged
However, this subroutine looks as follows:
Public Shared Sub listboxSelectedChanged(ByVal sender As Object, ByVal e As System.EventArgs)
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Mar 3, 2010
I am working on a page called Edit.aspx and on that page is a User Control.
Note: I need to access the User Control from a button that is on the Edit Page. Once I get a handle of the User Control then I need to access a DataList on that user control and finally I need to get the ID of a dropDownList
on the User Control
This is all the code I have,Goal: From the Edit page I want to drill backwards to the UserControl/DataList/DropDownList
'Geting the user control
Dim ctrl2 As UC_SiteTemplate2 = CType(Page.LoadControl("~/UC/SiteTemplate2.ascx"), UC_SiteTemplate2)
'accessing drop down list from user control
Dim xListNumber1 As DropDownList = New DropDownList()
xListNumber1 = ctrl2.FindControl("DDLOrderList1")
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Jan 20, 2010
In a User Control, I need to add a Div to the end of its parent's page. I've done this in a number of ASPX pages, where I put the code to generate the Div and its contents in the page's PreRender event handler, and it works fine. But when I try to do the same thing in the PreRender event handler for the User Control, I get the following error:
The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.How do I accomplish this in a User Control?
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Oct 16, 2010
referencing a control inside the createuserWizard template of the createuserStep
I tried like this:
Dim lastn As TextBox = CType(CreateUserWizard1.FindControl("LastNameTxt"), TextBox)
and like that:
[code]....
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Jan 11, 2010
i have:
- Default.aspx;
- user1.ascx: 1st user control containing repeater;
- user2.ascx: 2nd user control containing a detail view of row.
In page.aspx i dinamically load the repeater inside a user1.ascx.
after i want to dinamically load the 2nd user control also in default.aspx by a button inside a user1.ascx.
How i can do this? I can't load user2.ascx inside user1.ascx but only in aspx page.
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Nov 5, 2010
I have a page called main.apsx and on that page I have a multiview with a couple of view panes. In main.aspx I also have an have a buttons.ascx file with a few link buttons. When these buttons are clicked I want them to show the the selected view panels in multiview in main.aspx.
I cant seem to figure out where to put the action code for the link buttons. Do I put it into my buttons.ascx.cs file or into main.aspx.cs? I presume in buttons.ascx.cs, but if I do that, how will the buttons find the multiview control?
This is the code for on of my buttons in buttons.ascx.cs
[Code]....
When I run it like this is gives an error
The name 'MultiView1' does not exist in the current
The name 'View1' does not exist in the current
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Mar 4, 2011
I have a Web User Control that is sitting in a Tabcontainer on a web page. The user control is on tab 1 and has a listview control in it. In the listview control I have a textbox called txtWorkOrderID. In tab 2 I have a gridview with a button in one of the columns. When the button is clicked I want to grab the ID from the row I'm on and fill the txtWorkOrderID with it on tab 1. I've got things to work as far as grabing the ID and switching back to tab 1, but I keep getting a null reference when I try to put the value into the txtWorkOrderID which tells me its not finding the control. I am using .netVB in VS10. how to reference the textbox in the control on tab 1. here is what I have so far. [Code]....
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Nov 16, 2010
I have little strange question. I would like to Validate my Page Controls on the button click which is there in the User Control. This user control is placed on the Page. If I check Page.IsValid property on button click event, it returns false. But Validation Summary message doesn't popup. So user doesn't know what's happening. It will not save the information and it won't give the validation message too.
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Apr 6, 2010
we just started using Master Pages for our website and are having a problem referencing a control outside of our formview.
This label is located on the content section:
[Code]....
How to we reference this label accordingly?
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