C# - Set Properties And Create Events For User Control?
Dec 1, 2010
I'm creating a web user control in asp.net using C# in which i can select a date from a calendar and display it in a textbox. when i select a date from the calender it has to be displayed in the textbox. now i need to set my own properties by which i can select datetime patterns in cs codefile. for example
usercontrol1.dd-mm-yyyy.
this is one example. now i want all the datetime patterns of "en-us". when i use that usercontrol in another page i want to set any of the properties(datetime patterns) to that control.
public partial class DateControl : System.Web.UI.UserControl
{
string dateformat;
public string Dateformat
{
[Code].....
i said that i want set properties for my user control and create events for that..
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Nov 5, 2010
I am creating a user control that I wish to have inner properties as well as normal attributes. Although the actual function of the control has nothing to do with, say, UpdatePanel, I am trying to create something with similar ASPX markup. The developer designing the page should be able to use my control like:
<ns:MyControl ID="someID" runat="server" SomeOtherAttribute="true">
<ContentTemplate>
<asp:Label ID="someLabel" runat="server" Text="Normal page markup and controls should go here" /><br />
<p>This should be OK too.</p>
</ContentTemplate>
<ControlEvent ControlName="idOfOtherControl" Event="Click" />
<ControlEvent ControlName="idOfSomeOtherControl" Event="MouseOver" />
</ns:MyControl>
Also acceptable would be wrapping the ControlEvent tags in some other tag, more like what happens when using UpdatePanel:
<ns:MyControl ID="someID" runat="server" SomeOtherAttribute="true">
<ContentTemplate>
<asp:Label ID="someLabel" runat="server" Text="Normal page markup and controls should go here" /><br />
<p>This should be OK too.</p>
</ContentTemplate>
<ControlEvents>
<ns:ControlEvent ControlName="idOfOtherControl" Event="Click" />........................
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Nov 9, 2010
I want to use a couple of instances of the same control on a page. The user control is intended to display a list of records in a repeater. The aim is that the second control will show a list excluding the IDs in the first control The control has a number of public properties, including IDsInThisList, and IDstoExclude. The query will exclude the IDs in the second property.
What I would like to do is get the record IDs from the first instance of the control (IDsInThisList), and pass them to the second contro as the IDsToExclude.
I have a test page where I am setting the properties of the controls in code. As you might guess, it's not working! The first control displays the top 3 items, as desired, but the second display the records 1-7, rather than records 4-10 because it is not receiving the IDstoExclude from the first control When I response write the IDstoExclude from the first control in my testpage, the string is empty. (if I do it from within the control, it shows the IDs)
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Screen grab of test page + uc and test page code attached
[Code]....
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Jan 3, 2011
In an ASP.NET page I have added two user control with a dropdownlist each one. The selection of a dropdownlist should be changed the query to the second user control.What is the most efficient way to pass the selected value of dropdownlist to the second?I initially thought of creating a public event (public string OnClientSelectedIndexChanged) while the first user control and outsource through a public string SelectedValue the selected value of the second user control:
public string SelectedValue
{
get
{
[code]...
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Sep 19, 2010
I'm trying to make web form with two placeholders. Firs holder contains user control witch has list of buttons, each button opens different user control to second placeholder.
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So how i can dynamically create working user control with button click?
Here is how i create those controls:
[Code]....
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Dec 30, 2010
I have DropDownList inside User Cotrol and i use this User Cotrol in my asp Page , in my page i have method that take paramter string
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Jul 29, 2010
Dear friends, i'm working on user controls and events inside user control doesn't work for me.. my development process stuck due to this.
User control has a gridview which has rowcommands.
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Jan 11, 2011
I have a very simple user control in my web site project which has public property declarations as following
[code].....
When i drag the ascx file to one of my aspx page and when i go to code behind of aspx page i can access the controls properties through intelisense, but when i run the project through visual studio i get error "The name 'uctTest1' does not exist in the current context?
This is the line where Error shows when i run the project uctTest.StartDate = DateTime.Now;
aspx page markup :
[code]....
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May 15, 2010
i have a multiple user controls, each user control has multiple properties, i am loading those controls dynamically in my aspx page,i save the user control name in a hidden field in my aspx page,so i can know whats usercontrol are currently loaded,now i want to set/get some values for Currently user control properties,how can i know the properies available for that dynamics loads control ?also how to know the class for that control ?
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Mar 11, 2011
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Nov 3, 2010
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Mar 2, 2011
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Jan 6, 2011
've recently set up an ASP.net site (not using MVC.net) to use URL Routing (more on the code below) - when using user controls on the site (i.e I've created a "menu" user control to hold menu information) the page_load event for that control will fire twice when URLs have more than one variable passed over.
i.e.
pageName/VAR1 : will only fire the page_load event once.
while
pageName/VAR1/VAR2 : will fire the page_load event twice.
*Multiple extra VARs added on the end will still only fire the page_load event twice*.
Below are the code snippits from the files, the first is the MapPageRoute, located in the Global.asax :
[code]....
Note, that when I'm just hitting the page and it uses the default values for items, the reloads do not happen.
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Aug 28, 2010
I have a user control in an asp.net web application. The control outputs an html list that is customized based on the currently logged in user. The list items are generated from a database look up and the user control is formatted to appear as a drop down list in the page.
The control itself is simple and looks like this:
<%@ Control Language="VB" AutoEventWireup="false" CodeFile="item-lector.ascx.vb" Inherits="includes_usercontrols_item_selector" %>
<!--Item Selector-->
<div id="item-selector">
<%=Me.Output%>
</div>
The code behind file dynamically fills the control's "output" property so the final markup appears as follows:
<div id="item-selector">
<h1>Item 1 - Item 1</h1>
<a href="#" class="changeItem itemArrow">Change item</a>
<ul id="changeItemMenu" class="dropDownMenu">
<li><a href="#">Item 1</a></li>
<li><a href="#">Item 2</a></li>
<li><a href="#">Item 3</a></li>
<li><a href="#">Item 4</a></li>
<li><a href="#">Item 5</a></li>
<li><a href="#">Item 6</a></li>
<li><a href="#">Item 7</a></li>
<li><a href="#">Item 8</a></li>
<li><a href="#">Item 9</a></li>
<li><a href="#">Item 10</a></li>
</ul>
</div>
The ID and class properties are all necessary for formatting and other scripting. The control is meant to be used as a selector and the rest of the page should react to which item the user selects.
What I am trying to do is add click events to the list items. When the user clicks on one of the items in the list, I want to capture which item the user selects in the list (does this require a postback?) and do something with it in the code behind (< this is key).
I am more of a middle tier and db tier developer and UI development is not my strength so please consider me a newbie in that regard. I am not sure how to proceed or what to inject into the output string to enable this.
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Feb 2, 2011
I have built a user control that has a public property string[] foo.
Is it possible to assign this in the actual markup?
The type of project is ASP.NET webforms / web application.
Ive tried the following syntax, but it doesnt work: (It compiles but the value is never assigned).
<abc:MyControl runat="server" foo='<%# new string[]{"Hello"} %>' />
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Jan 25, 2011
I have a user control (i.e. ascx) that comprises of two related list boxes (i.e. once you change the selected item in one list the contents of the other list update). I'm adding this user control dynamically to a page on the click event of a button (i.e. using LoadControl).I wish to set the list box datasource properties, as well as the default selected item of the parent list from my parent page so I created public properties in my user control to accomodate this. I also created an event in my user control that notifes the parent page when the selected item changes in one of the list boxes so I can update the contents of the other list box.
I understand that I have to recreate the user control on every postback in order for it to function correctly but I'm not sure exactly how I should be doing it. I've shown below what I have currently - whilst it works the problem is that on postback I'm always creating the user control with all its default properties and then updating the properties that need to change(?). For example, when the choice in theparent list box changes the datasource of the list box is set twice (once in AddControl and then again in OnParentChanged)? As the contents of the list boxes originate in a database it means I'm making unnecessary calls to the database (unless I do some something like store each unique set of data in the ViewState).
I'd be very grateful if someone could review how I've done things and illustrate how perhaps I should be doing things. I'm not sure if the way I've done this is considered the 'correct' way. For example there may be a better way of doing things would avoid setting the properties twice? I'm a bit unsure of the way I've set the datasource properties of the list boxes and bound them. I wished to set the datasource from the parent page because I might have a second user control on my page that may also use the same datasource and I could reuse it (as opposed to each control making its own call to the database) so I'd like to keep this feature if possible.It would be great if posting code in reply that you use my example as a guide so I know what you're referring to.Here's the code for my user control:
[Code]....
[Code]....
Here's the code for my containing page:
[Code]....
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Mar 19, 2010
I have a webpart that loads in a user control programmatically. Although the webpart has personalization properties that I can use and pass to the user control, I haven't found a way for the user control to be able to update the outer webpart's properties -- the user control knows nothing of its parent webpart except what it is given. When I try to use the [Personalizable] attribute on a property inside the user control, it doesn't work; it doesn't save anything to the personalization database. In a nutshell, I need the user control to be able to personalize its properties (e.g. for a date picker within the user control where the date has to be remembered between sessions) or to somehow be able to update its parent webpart's properties.
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Sep 15, 2010
With following code, I can fetch all properties of user control. I need to get only those properties which were separately defined excluding the default ones.
[Code]....
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Oct 28, 2010
I have an aspx webpage in which an user control is added dynamically as follows:
UserControl testUsrControl = LoadControl("TestUsrControl") as UserControl;
testUsrControl.ID ="test";
Then I tried adding an event handler of user control inside aspx like below:
testUsrControl.Drpdatafield_SelectIndexChanged += new EventHandler(this.Drpdatafield_SelectIndexChanged);
But this line is giving error at **testUsrControl.Drpdatafield_SelectIndexChanged **. The error is "Drpdatafield_SelectIndexChanged" doesn't exist in UserControl.How can get the testUsrControl's events inside aspx page dynamically.
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Oct 26, 2010
My main file is messages.aspx and i am loading a UC names message_inbox.ascx dynamically as:
SiteUserControls_Message_MessageInbox InboxUC = Page.Load("message_inbox.ascx") as
SiteUserControls_Message_MessageInbox
Now in my user control ("message_inbox.ascx") i have a various events which i am combining in one group event :
public void ForwardLinkButton_OnClick(object sender, EventArgs e)
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Feb 23, 2010
I have user control that inherits a base control class and these user controls are loaded using the LoadControl method, I can't seem to figure out how to raise events from user controls to the page that are dynamically loaded this way. Here is the delegate and event in the base user control class.
public delegate void SomeChangeEventHandler(object sender
, SomeChangeEventArgs e);
public event SomeChangeEventHandler SomeChangeEvent;
public virtual void OnSomeChanged(SomeChangeEventArgs e)
{
if (SomeChangeEvent != null)
{
SomeChangeEvent(this, e);
}
}
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Feb 18, 2011
I'm attempting to create a simple menu user control just as outlined here.
The attached code results in an "Object reference not set to an instance of an object" error, but I can't figure out why.
<%@ Master Language="VB" CodeFile="MySite.master.vb" Inherits="MySite" %>
<%@ Register src="Controls/Menu.ascx" tagname="Menu" tagprefix="my" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">......
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Mar 30, 2010
i created a user control that has a template container.
[code]....
This is control is placed in a repeater which lists some customers. The customer is than bound to the user control. When the name template is instantiated in the container, the customer object is not yet available, but I need to access its name because it needs to get parsed before.
[code]....
Question: How can I access properties set for the user control BEFORE the template container is instantiated?
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Feb 9, 2011
I have a public property defined in code behind of a user control. I want to toggle visibility of controls in the markup based on the property's value.
However, using the following syntax:
<td style="display:<%#(Container.PageControlMode == PageControlMode. PageMode.Wizard) ? "none" : "inline" %;">
I have the following property in my code behind:
public PageMode PageControlMode { get; set; }
Does not work and generate errors.
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Jun 12, 2010
I have a master page with a user control on it. How do I change the user control's properties from a content page?In my ascx file I created this 2 property:
[Code]....
In content page PageLoad event I wrote
[Code]....
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