Why Does Controls.Add Called Inside Custom Control Adds The Validator To The Parent Page
Jan 2, 2010
there is a sample code for creating a custom textbox control with built in validation posted here Building ASP.NET TextBox with Integrated Validation And Switchable Input Modes. Inside the code there is a call to Controls.Add(validator) which adds the asp.net validator control to the textbox. when the textbox is used on the page, the validator is rendered to the page although the validator is added to the textbox and not to the page!
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Oct 22, 2010
I want to create a custom control where I define several specifically named DIV sections. The code-behind logic of the custom control will perform operations on these named DIV sections. The page where the custom control is hosted needs to be able to add named controls to the DIV sections and perform operations on these named controls added to the DIV sections.
Let me explain a little further. In the custom control, I want to have code behind logic that fires the following Page Event and uses a condition to make one or another specifically named DIV section visible or not:
< _
ToolboxData("<{0}:BaseDetails runat=""server""></{0}:BaseDetails>") _
> _
Public Class BaseDetails
[code]...
how can I create a custom control which is able to generate the named DIV sections "DetailsNameDiv1" and "DetailsNameDiv2" where my custom control can check a condition and make one or the other visible. Also, I need to be able to add controls to these named DIV sections when I host the custom control and the control that I add to the named DIV section needs to let me set values of these controls from the code behind logic of the page (or usercontrol) where the custom control is being hosted (in my example, I am adding TextBox controls that I want to set the Text property from a SQL Data Reader).
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Jan 31, 2011
I have created one user control for changing the theme of the page where i have several buttons and on click of each button i am applying the theme of clicked buttons color and for that i have created several css files like red.css, blue.css , green.css etc.
now i want to apply this theme to the page but i am not able to do that from the user control as because i am not getting the stylesheet property in the page and thus i am not able to work further.
can anyone tell me how can i apply the theming from user control to the page its being called.?
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Jan 20, 2011
here is the code "when i select a value from calender customvalidator is not called . . "
[Code]....
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Jan 21, 2010
1) I've page class public partial class MyDelivery : System.Web.UI.Page
2) ASCX is in different subfolder public partial class MyControls_Hello_Bye : System.Web.UI.UserControl
I am unable to access #1 parent page class from control
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Mar 11, 2010
My original understanding was that the asp.net page lifecycle is run once for all pages and controls under normal circumstances. When I attached a control during a container's OnPreRender, I encountered a situation where the control's OnInit was not called. OK, I considered that a bug in my code and fixed as such, by attaching the control earlier.
But just today, I encountered a situation where OnInit for a control seems to be called after the normal OnInit has been done for everyone else. See stack below. It seems that during the page's PreRender, the control's OnInit is called as it is being dynamically added.
So I just want to confirm exactly what ASP.NET's behavior is? Does it actually keep track of the stage of each control's lifecycle, and upon adding a new control, it will run from the very beginning?
[HttpException (0x80004005): The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.]
System.Web.UI.ControlCollection.Add(Control child) +8678663
MyCompany.Web.Controls.SetStartPageWrapper.Initialize()
MyCompany.Web.Controls.SetStartPageWrapper.OnInit(EventArgs e)
System.Web.UI.Control.InitRecursive(Control namingContainer) +333
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Control.AddedControl(Control control, Int32 index) +198
System.Web.UI.ControlCollection.Add(Control child) +80
MyCompany.Web.Controls.PageHeader.OnPreRender(EventArgs e) in
System.Web.UI.Control.PreRenderRecursiveInternal() +80
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842
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Nov 25, 2010
Can a required field validator be called from the code behind page?We have several check boxes and some of them require the user to enter a date, but not all of them.(This is not a checkbox list, but individual checkboxes).Any 1 of 6 different checkboxes selected makes a txtBox visible for users to enter a date.If they don't select one of these checkBoxes which require a date - it doesn't matter, the form will still be valid.I don't think validation groups can work here so looking towards doing through .vbHere's the existing code:
Public
Sub chkBoxI_CheckedChanged(ByVal sender
As
[code]...
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Dec 24, 2010
here's a situation and I would appreciate your response.
I have programmatically created the Wizard control:
Page_Load(obj s, evargs e)
{
Wizard ClaimDetailWizard = new Wizard();
foreach(int item in selectedItems)
{
//create new step
//added custom control to new step
//add step to wizard
}
//added wizard to a placeholder on a page
}
Based on List I get from Session i added new steps to my wizard To each step I had added a custom control
Each custom control in tern contains another custom Gridview Control in it.
So here's the problem when the page loads for example for two steps. All is good Wizard does what it's supposed to do.
But when I try to use sorting or paging in that custom Gridview. Somehow it displays the gridview I should see in the next step of the wizard.
Also what I'm noticing through debugging. Is that when I press next in the wizard I go back to the original page where I do all of the code specified above, and it recreates the wizzard. But it goes to the next step. Is this the way wizard supposed to work? Just doesn't seem very efficient.
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Sep 10, 2010
I am using a PasswordRecovery Control and have changed one of the validators to a custom Validator, however, OnServerValidate neer seems to get called.
Can someone tell me how to get the OnServerValidate to work correctly?
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Jun 26, 2013
With respect to my previous questionListview Checkbox checked using jquery . The code works fine and it checks for any checkbox checked in listview and returns a alert msg but now it does not check for any required field validators in the page. I the checkbox is checked it fires button click event. I need to check for validators also and after that only it must check for checkbox validation. The link for previous question is [URL] .....
I need to merge the code for required field validation check with checkbox check.
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Dec 1, 2010
I am writing a custom control by inheriting "Control".
I wany the custom control to have multiple control nested inside it i.e. my custom control can have other controls in it.
How can I do it, would I have to implement any interface or what.
At the end, I want the code to look something like this.
[Code].....
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Dec 17, 2010
I created my custom validator in one project, something like that:
[Code]....
he composite control in another project. I added a reference of the custom validator project to the composite control project. I have a textbox in a composite control and I would like to validate this textbox by the composite control I created. But how can I do that? How can I create the custom validator instance that is linked to the custom validator I created?
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Nov 15, 2010
I have a weird design. I have page called A, it has control called C1 which has a control called C1-1 which has a control called C-1-1-1. C-1-1-1 is inside a modal popup extender. Whenever their is a postback, the C-1-1-1 's Pre_Render is called twice, first with the correct values and parameters which seem right. And second with all values seemingly reset (sounds like a new object construction).
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Jun 11, 2010
I have to access the parent form's controls inside an event handler method on my user control's code behind.
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Aug 21, 2010
I want to write own control which can contain other. And I want to define content of the control in the .aspx file where the control is defined. I have written such control. But now I have issue with ViewState of inner controls of my control. The following samle illustrates the issue: I defined two asp:DropDownList ID="ddl1" and ID="ddl2" One of them is inside of my control and other is outside. When posback is occurred asp:DropDownList ID="ddl1 loses state and becomes empty. How to say ASP.net to store state of inner controls defined by this way?
MyControl.ascx:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MyControl.ascx.cs" Inherits="DynamicControls.Controls.MyControl" %>
<div class="box"> [code]....
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Dec 20, 2010
created a Custom Textbox Control that is intended to be a "masked date" textbox, so that I can handle different ways a user might enter in a date and make it work no matter what.I did this by creating a custom control with 3 separate Textboxes one for month,one for day one for year,then do some handling for different things that could be entered and it would all work.
The problem I am having is,when I add this control to the page,if I do an alert to check the Text value of the custom control it just gives me "[ServerControl1]" even if I enter in a date.
I tried doing an AutoPostback after entering so that it would refesh the Viewstate to have the values of the textboxes but the control doesnt seem to actually postback, even though I have it enabled.accessing the Textbox value after someoen
has entered a date?first custom control I have created and have been using google.
My Server Control Code is as follows:
[Code]...
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Sep 18, 2013
Is it necessary to give Control to Validate control in Custom Validator?
If yes then why this will happen?
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Aug 19, 2010
I have used calender web user control inside my project where i took textbox,button and calender...but after dragging onto my aspx page..i am unable to access this textbox,calender and button on aspx page..
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Jan 13, 2010
I've been trying to get a custom validator component working that ensures at least one checkbox from a checkboxlist has been checked. I've been used some code I found on dotnetjunkies.com but the client-side validation didn't work. I've been attempting to modify it to get the client-side javascript validation to work with no luck. Basically, I compile the below code into a DLL and add it to my bin folder.
[Code]....
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Mar 27, 2010
I am getting an error while calling a javascript from a dropdownlist which is placed inside a modal pop-up panel. if i am ebeding a small script like onchange="javascript:alert('hello');", it works fine. But if i m using <script> </script> for embeding a javascript its showing 'object doesn't support this property' error. when i debugged it the compiler does not get into the javascript function.
Below is a screenshot of that page.
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Oct 6, 2010
I am having a strange issue.
I have a file upload control and a custom validator to check the file size.
When the file size is small and when I hit upload button it hits the breakpoint on the custom validator BUT strangely when the file size is big it does NOT hit the custom validator and see the following IE error.
Internet Explorer cannot display the webpage
Diagnose Connection Problems
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Apr 27, 2010
what is the reason its never get in to the customvlidator event?
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Sep 15, 2010
I am running the code below in a .net 2.0 content page.There are no containers such as wizard etc. When I click on the submission button for debugging purposes I get 'Nothing'. why I can't access the 'controlToValidate'?
Protected Sub validateCharacter(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs)
If Page.IsPostBack Then
Dim validationControl As CustomValidator = DirectCast(source, CustomValidator)[code]....
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Mar 30, 2010
Is it possible to have a validator inside of a User Control? If so, does anyone have a snippet of code from a working example?
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Sep 8, 2010
I have an ASP.NET custom control with several asp:panel controls that have various questions for users in them. When the control loads I need to set a Session object to the default panel (first question). This worked when I had the objects and code in a web form, but I moved them to a custom web control, and now when I try to access that control in the Load event of the custom control it says the default panel control is null. It seems that the controls are not created when the Load event is firing. Evidently the order of loading controls is different between web forms and custom controls. Can someone explain to me where the controls inside the custom control will become available to use?
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