I'm adding controls from code behind but I dont know how to add an event for each control
X below is from the for loop
Code behind
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What I would like to do is to access libServiceActions CommandArgument in code behind to set db tabel with the values thats passed.
I am working on a web form using VS 2010. The controls I've added previously to this form will show in the drop down list in code behind and are available to add events too. However any new controls I've added for last week or so are not visible in the list. I cannot access their events. I have scoured the forums and tried everything I can think of, nothing works.
View 5 RepliesWhile I am using a "Telerik" control here it shouldn't be any different I guess;
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What happens is that the control is created and rendered;
When I change value in the Combo box a Post-Back happens.
HOWEVER, the event RadComboBoxSelectedIndexChanged does not fire. Also when I am back at the page the new value is not saved; Obviously, i recreate the control every time. If I don't I get a ViewState error. Seems to me that there some ViewState management problem, but I cannot identify it...
How can I get the placement of dynamically added control in any page event.
View 6 RepliesAt run-time I add a dropdownlist but when user selects an item there is no event for:
SelectedIndexChanged
CODE THAT ADDS THE DROPDOWNLIST TO THE PANEL:
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AND, THE EVENT HANDLER:
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In one of the steps of a wizard control are 2 dropdownlist which data come from 2 distinct queries and cascade from the 1st one to the 2nd one. Where and how can code for that data binding and cascading be placed since it seems codebehind window for both of the dropdownlists cannot be found in VS property or event windows?
View 3 RepliesI am not trying to activate an event or run a subroutine from a control from the masterpage, I am trying to activate or run from VB codebehind of the master page.
I have a button in a content page with a particular .click even that I want to activate from the masterpage codegehind periodically.
Also, how do I access or run a subroutine in a content page from codebehind in a master page.
I add one or more textbox controls to a repeater itemtemplate during OnItemDataBound.
The textbox controls are instantiated and then added to a placeholder.
My problem is getting the user entered values from those dynamically added textboxes. They do not seem to exist in the repeater items collection.
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I am having difficulties how to construct my question, but if I have to put it simply the situation is that I have categories of products. I have an aspx with a repeater on the left that lists the categories. And I want the products to be listed on the right. Category number is variable so I made an ascx with a DataList in it. When I try to do foreach category, ascx = new ascx(); then the DataList within this ascx control is null.
ps: what I want to do is to preload all the products (thre is not much) and hide the divs and fadein fadeout them using jQuery when a category div is clicked.
rightnow it is using jQuery.load(); and I don't like how the images load, cuz they download from top to bottom. Progressive gifs alsdo not an option. site demo is here [URL]
I'm creating an ASP.NET control dynamically based on a value selected in a dropdown; for instance the field can be a textbox or a checkbox (for now), and then it gets added to a placeholder control. However, I'm unsure how to retrieve the value - using the placeholder's FindControl method returns null although I'm specifying the ID when I create the control.
Here's my code:
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I have a user control say SearchVendor.ascx which contains 4 buttons a gridview and another user control. I need to load the control dynamically actually as a modal pop up
I get this code
var uc = Page.LoadControl("~/blah/VendorProductSearch.ascx") as VPSearch;
uc.ShowVPSearch(true);
_tempPlaceHolder.Controls.Add(uc);
it works fine the control gets loaded properly but onclick of any button the second time the control disappears ?
I want the dynamically added control to remain until the user clicks on the cancel button
I have the following code in Page_Init (actually in a function called by Page_Init in response to a __doPostBack call)
System.Web.UI.WebControls.DropDownList ddlGroup = new System.Web.UI.WebControls.DropDownList();
rowString = rowNumber.ToString();
I have a control that handles commenting. In this control, I have set a delegate event handler for sending an email.
I then have various types of controls, e.g. blog, articles etc, each of which may or may not have the commenting control added (which is done dynamically with me not knowing the id's), i.e. the commenting control is added outside this control. Each of these controls handles it's emailing differently(hence the event).
What I'm trying to determine, is how to assign the event in the parent control. At the moment, I'm having to recursively search through all the controls on the page until I find the comment control, and set it that way. Example below explains:
COMMENTING CONTROL
public delegate void Commenting_OnSendEmail();
public partial class Commenting : UserControl
{
public Commenting_OnSendEmail OnComment_SendEmail();
private void Page_Load(object sender, EventArgs e)
{
if(OnComment_SendEmail != null)
{
OnComment_SendEmail();
}
}
}
PARENT CONTROL
public partial class Blog : UserControl
{
private void Page_Load(object sender, EventArgs e)
{
Commenting comControl = (Commenting)this.FindControl<Commenting>(this);
if(comControl != null)
{
comCtrol.OnComment_SendEmail += new Commenting_OnSendMail(Blog_Comment_OnSendEmail);
}
}
}
EDIT:
The reason I ask is that if I search from this.Page as the initial control, I am worried about time taken to search down the control tree to find it. Each different type of page would be different in how many control it would have. On some testing, it returns back quite quickly the result.
I have a gridview that on it's RowDataBound event I dynamically add Image Controls to some columns.
The problem is that I lose these images on the next PostBack.
OBS: The GridView's EnableViewState propertie is already set to true
I know about the page lifecycle, but how can I persist these images if I have to add them on the RowDataBound event?
In addittion, if I add a static TemplateColumn with an Image Control and I set it's ImageUrl propertie inside the RowDataBound event it will obviously persist between postbacks. The problem is that I don't know how many columns with images I'll have, it's defined on the datasource.
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I have searched around but unable to find a solution that will work. I have a link button that is created dynamically during the page load. It is given an ID (obviously). There is a script manager on the page. I have the controls added to a panel in the updatepanel (updatePanel1). There is a dynamic label that is also created with each link button. I can get a response from the linkbutton click event during a postback on the second time clicking the linkbutton, but I am getting a complete postback instead of the asyncpostback for that control. During the creation of the dynamic linkbuttons, I am also creating a dynamic trigger for each button and adding it to the updatePanel1. The Click event is not firing the method without doing a complete page postback.
View 4 RepliesI m trying to load a new tab which should load WebUserControl2.ascx on button_clickbut I m coming across this eror: A Zone can only be added to the Page in or before the Page_Init event.I have a webpart in WebUserControl2.ascx which should load FeaturedControl.ascx.Well, i m getting the error when i click on button at :
Private Sub LoadTab2()
Dim uc2 As UserControl = CType(LoadControl("WebUserControl2.ascx"), UserControl)
tp2.HeaderText = "Tab2"
tc1.Tabs.Add(tp2)
tp2.Controls.Add(uc2)
End Sub
Where, tc is tabcontainer, tp is tab panel.
i have taken a data list.in that i have added a imagebutton field that is bind to a image field of database.i want that when the image is clicked from the datalist that should be shown to the other image field in web page
View 4 RepliesHow would you call a Javascript Function from CodeBehind on Page Load event without : Ajax (ScriptManager), Response.Write ?
View 2 Repliesive created my own custom control, now in the code behind of the custom control file i can add Name.Click += new EventHandler(name); but on the codebehind of the page where ive used the custom control i cannot, is there anyway i can regsiter it as an available attribute to add? my code below and on the image the test codebehind click is not available, how can i get it?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class LargeButton : System.Web.UI.UserControl
{
public string JSFunc { get; set; }
public string SSFunc { get; set; }
public string ImgName { get; set; }
public string LinkText { get; set; }
protected void Page_Load(object sender, EventArgs e)
{
Link.Attributes.Add("onclick", "javascript:"+ JSFunc + ";");
Link.HRef = "javascript:;";
Link.Title = LinkText;
Img.Src = "~/App_Themes/" + Page.Theme + "/Images/Icons32/" + ImgName;
Img.Alt = LinkText;
//Link.ServerClick += new EventHandler(asd);
}
}
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="LargeButton.ascx.cs" Inherits="LargeButton" %>
<a ID="Link" runat="server" class="MenuItemLarge" clientidmode="Static" >
<img ID="Img" align="center" runat="server"/>
<br />
<%= LinkText %>
</a>
<MB:LgButton runat="server" ID="Save"
JSFunc="Save(this)"
ImgName="save_32.png"
LinkText="Save" />
All of my columns are bound in the Gridview. On OnRowDataBound event, I am adding some custom styles like underlines and colors to the text of the columns. Sorting of data is working fine but I am losing my custom styles when I sort. I am using the generic sorting code for the GridView.
How I can keep my custom styles on sorting that I added during OnRowDataBound event.
I am getting started with a new web site using Web Developer Express 2008.
On the default.aspx source, I dragged a button control in between div.
<input id="Button1" type="button" value="button" /> was inserted.
But according to the tutorial, I should get asp control in the form <asp:control ....>
I have checked the top line of the page contains this line:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>
I want to be able to show the record that was just inserted after add_button_click event. I run the insert from mycommand and then set mycommand2 to run the read to populate a details view. I have a feeling I am going about this the wrong way. The insert fires correctly but the details view does not populate.
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I'm trying to use the codebehind to add a click event to a TableCell..I basically want the user to be able to click a cell and cause a server side click event so that I can call a method with the GUID of the item in the cell...seems this functionality should already be built-in but I've been unable to find much in the way of instruction
View 2 RepliesI add linkbutton controls dynamically to a panel, this works fine, but I also add eventhandlers to them like this.. AddHandler mLink.Click, AddressOf mLink_OnClick But when I click the linkbutton links, the event never happend. I have one updatepanel wrapped around some panels. What could be wrong?
View 3 RepliesI've inherited an ASP.NET project that has poorly designed HTML; in one section, the tags are wrapped with an tag to allow for "click the row to view the information" functionality. The code is:
<asp:LinkButton ID="ViewArticle" runat="server" CommandName="Navigate" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "id") %>' >
<tr runat="server" class="list_item">
<td>some data</td>
<td>some data</td>
<td>some data</td>.........
How do I go about tying a JavaScript "onclick" event to the codebehind?