Custom Server Controls :: C#.net Automatic Event Wiring "partially" Not Working?
Feb 2, 2010
I'm trying to write my first server control. It's supposed to be a pager (like in the GridView Control Pageing-"thingy").
(It looks something like this : 1 2 3 4 5 6 7 8 9 10 ...)
I'm trying to implement it by making the control inherit Table properties and then adding two rows. One row has a hidden field that has the current selected page and the other has LinkButtons in individual TableCells.
The problem I'm facing is that the LinkButton.Click event only fires on the first 10 linkButtons but not the dots (...). What I mean is, when I press the dots (...) it renders like this: .... 11 12 13 14 15 16 17 18 19 20 ... BUT when I press any of these LinkButtons the control just "reloads" itself and renders from 1 to 10 ... (and the Event never fires) I don't know what I'm doing wrong but I think it has something to do with the "override" functions because I don't know which to use. I have tried quite a few but haven't found the right way to do this. The Code I got so far:
[Code]....
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Feb 15, 2010
the page can be seen here [URL]
the client side validation is working for the adding date and time, but there is no validation firing for the count and room fields, I think i have coded them all the same, see sample for time and room below, maybe somebody see's something i missed? the validation group fires when the add button is clicked. also if possible I would like to get validation messages to appear in a validationsummary control that I already have coded and that is working when using the edit/update the rows presented with existing data.
[code]....
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Sep 3, 2010
Iam developing a custom checkbox control deriving from the 'compositecontrol' which i need to use it for a composite control purpose.
public
class
TngCheckBox :
CompositeControl
{
i have written the required properties which are working fine except the "checked" property. here is my code for 'checked' property. i tried both the below ways (commented one and not commneted) . the problem is the 'checked' value is not setting the value at the get set part of the property.its assigning the value at the design time , but when i check and uncheck its not updating the property value.which is resulting me wrong .
[Code]....
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Oct 15, 2010
Iam developing a custom checkbox control deriving from the 'compositecontrol' which i need to use it for a composite control purpose.
public
class
TngCheckBox :
CompositeControl
{
i have written the required properties which are working fine except the "checked" property. here is my code for 'checked' property. i tried both the below ways (commented one and not commneted) . the problem is the 'checked' value is not setting the value at the get set part of the property.its assigning the value at the design time , but when i check and uncheck its not updating the property value.which is resulting me wrong .
[Code]....
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Jan 13, 2010
When I implement Custom web control inheriting ASP.NET Menu Ajax is not working. I try to Override Render method and generate Li's rather than table.I try to use Control Adapters, but when I am not using adapters for some pages ithe base adapter is generating just hyperlinks with span. I do not want this way. So I can not use these.
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Nov 16, 2010
I built a webcontrol showing a complex user interface with a lot of javascript. Basically my webcontrol is similar to : [URL]
Now that most the user interface is working properly, I'm stuck with the following issue: I want to add a button (html button tag) which has to trigger an event. I have been able to declare the event, the event args, the delegate,etc. The page using my control may assign a handler and that handler is called correctly when I explicitely call OnServerControlClick (The name I gave to the event). I cannot make the link between the button in the user interface and the event in the webcontrol source code. When the button is clicked, I get an error message saying a dangerous Request.Form value has been detected.
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Aug 28, 2010
I have a base server control class for all my user controls. Inside this class I have the following declaration:
[Code]....
Concrete user controls used in the application are used always inside a ModalPopupExtender object and the popup it is always handled with server-side code. This means that there are no controls binded to the OkControlID and CancelControlID properties of the ModalPopupExtender.
The responsibility to show the Modal Popup is then given to the aspx that has code like this in the ASPX file...
[Code]....
To hide the modal Popup the aspx just implement the event handler
[Code]....
Last, the event firing is responsibility of the concrete UserControl class that can use any way to do it's work and then fire teh event. This is done through this code:
[Code]....
The problem I am facing to is that in the OnItemSaved of the super class the ItemSaved EventHandler is always null and so the event it's never fired on the aspx page. Where am I doing wrong?
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Apr 5, 2010
I come from the Windows forms side and started using ASP.NET. I have not found how to use event handlers properly.Basically I want to create a shopping cart web control. When a purchase has been made I want to raise an event with products in the purchase. I would like to have the shared/static event and delegate on the web control and then, maybe in Global.asax (if not possible elsewhere) handle that event.
How can I do this? It seems I cannot access objects from other pages/controls.
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Dec 21, 2010
I have a radgrid with multiple filters including DateTimePicker for From DateTime To DateTime.
[Code]....
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Jun 18, 2010
while i was using flash movie on my application nobody was able to watch it . However I know the reason that is flash plugin should be installed on client side. So here i want to deploy a msg or utility to install a flash plugin as:
there should be a button having text install flash plugin now and on clicking it setup should execute on client side so that it will run setup and every body will be able to watch it.
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Jan 16, 2010
I have build a composite control containing a Label, TextBox and a ImageButton. The idea:
Label text | textbox | imagebutton used for triggering an event
This textbox has a build-in validation.
When the imagebutton is set, i will use this imagebutton as a trigger. This imagebutton has an onclick event. Nou my problem is the following:
When i have my textbox on a form an click a button to validate my textbox validation takes place correctly.
If my textbox has the imagebutton enabled and i click this imagebutton validation takes place.
In my composite control i have implicity set imagebutton.CausesValidation = false;
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Jun 18, 2010
I have a user control SearchCriteriaCtrlr.ascx(see below).In this user control, I have a javascript code for filtering listbox values.I am firing this javascript for
<asp:TextBox ID="txtSearch" runat="server" onkeyup="FilterItems(this.value)"></asp:TextBox>
Problem:The problem is, my filter javascript is not working
SearchCriteriaCtrlr.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="SearchCriteriaCtrlr.ascx.cs"
Inherits="TimecardAdmin.SearchCriteriaCtrlr" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<link href="Styles/Site.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
//variables for holding different values
var ddlText, ddlValue, ddl, lblMesg;
function CacheItems()
{
//Array for holding Text
ddlText = new Array();
//Array for holding Value
ddlValue = new Array();
//Listbox value
ddl = document.getElementById("<%=lstSource.ClientID %>");
//Looping through all values of listbox
for (var i = 0; i < ddl.options.length; i++)
{
ddlText[ddlText.length] = ddl.options[i].text;
ddlValue[ddlValue.length] = ddl.options[i].value;
}
}
window.onload = CacheItems;
//function for filtering items
function FilterItems(value)
{
ddl.options.length = 0;.....................
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Oct 20, 2010
Iam developing a custom server control of radiobuttton. it is working fine with the all the properties i wrapped except the grouping . somehow the grouping is not working .
[Code]....
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Mar 1, 2010
I an expanding on the HotGridView control (http://msdn.microsoft.com/en-us/magazine/cc163612.aspx). During testing I noticed the "AutoGenerateCheckBoxColumn" behavior was returning true even if the user did not specify the a value in the markup but I expect it to return False if not value is supplied by the user - can anyone shed some light on why the AutoGenerateCheckBoxColumn is always true if not explicitly set to False in the markup?
[Code]....
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Apr 14, 2010
I have a custom control that renders a button. I'm trying to attach a server click event but it isn't firing. My code is:
protected override void CreateChildControls()
{
btnRangeGo = new Button();
btnRangeGo.CssClass = "divSearchGo";
btnRangeGo.Text = Resources.CORE_Resource.S0C29; // Go
btnRangeGo.Click += new EventHandler(btnRangeGo_Click);
// Tried with no luck:
// this.Controls.Add(btnRangeGo); // Needed so OnClick gets registered
// Page.Controls.Add(btnRangeGo); // Needed so OnClick gets registered
}
private void btnRangeGo_Click(object sender, EventArgs e)
{
int i = 1;
}
OnRender:
btnRangeGo.RenderControl(writer);
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May 10, 2010
My CompositeControl creates dinamically several RadioButtonLists according to the DataSource information. These controls are added to the Controls list and rendered in CreateChildControls event.
I need to create a LinkButton that clear a specific RadioButtonList selection and do a postback, to load the DataSource information again (some selections changes the data that need to be loaded from the database). For each RadioButtonList, I've put a LinkButton and assigned the Click Event to a method inside the same CompositeControl, to do the RadioButtonList cleaning.
Unfortunatelly, the LinkButton doesn't trigger the Click Event. In HTML code, the link has the "onclick" attribute setted with the asp.net event, but when clicked, nothing happens.
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Jul 22, 2010
am creating a custom server control and there are textbox and button.
I want to add event button to let user execute his/her own code.
I mean my event must show in Events menu at VS (like Property)...
the following image show :
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Apr 6, 2010
For test purposes I have created a simple button control that extends CompositeControl. I am able to place it on the page with a <asp:Content... and the Click event Bubbles without problem from the Control.
Now, here is the problem I am facing Due to design requirement I need to read the assembly and the classname from a table and dynamically create the control and add it to the <asp:Content. And when I do that the click event will not fire! Where am I going wrong.
Here is the code in the ButtonControl.cs
namespace Reports.Web.ServerControls {
[DefaultProperty("Text")]
[ToolboxData("<{0}:ButtonControl runat=server></{0}:ButtonControl>")]
public class ButtonControl : CompositeControl {
protected override void CreateChildControls() {
Button btn = new Button();
[Code]....
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Oct 1, 2010
i have develop a custom control as shown below
[Code]....
[Code]....
Now in page load event i am trying to a access textbox (txtData) of my custome control as shown below
[Code]....
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Dec 2, 2010
Header controls like create ,delete are created by using templated user controls (ITemplate) .
The controls are working in all pages except the last page when paging is enabled in grid view.
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Nov 12, 2010
How to create event handlers for Composite Controls. I have created a composite control with label, textbox and button. Like this
[code].....
Now how to write the code once a event fires like text changed or click.
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Jul 29, 2010
I have a custom ascx user control on my page that includes a dropdownlist. There is an nSelectedIndexChanged event handler that is connected to this dropdownlist. The first time the user selects a value, the page does a postback and the logic executes correctly. However, if the user then goes to change their selection, the event handler does not get triggered.
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Feb 11, 2011
I have a DetailsView control bound to an ObjectDataSource within a User Control (.ascx). It appears that the DetailsView.OnDataBound event is being fired on every page load or postback.
I do not see this behavior with a similiar DetailsView directly placed on an aspx page.
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Jan 3, 2011
Hope this is the correct forum for this question. I am using VWD 2010 an have a web project and get the following error upon execution:
Parser Error Message: Unknown server tag 'custom:AjaxValidator'.
My code is as follows in the .cs file:
[Code]....
[Code]....
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Mar 25, 2010
how we can access the Remove button event of the Collection Editor dialogue box?
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