Web Forms :: UserControl To UserControl - Same Object Instance Transfer

Sep 27, 2010

There are 2 UserControls UC1 and UC2, and there is one more class C. I want to share the same instance of c in both UserControls. I know that this can be possible with properties in both UC's and by registering UC2 in UC1 or vice versa. But I want the solution to be loosely coupled. Any best possible way without touching the Actual Page (which hosts UC's)? So i need some best possible way between UCs transfering C.

View 5 Replies

Similar Messages:

Web Forms :: Accessing Control In Usercontrol / Error: Object Reference Not Set To An Instance Of An Object

Apr 19, 2010

In the same Code behind file I have:

// This works

Label lblTopNavBarInfo = (Label)Master.FindControl("lblTopNavBarInfo");

lblTopNavBarInfo.Text = "Currently Serving: + FirstName + " " + LastName ;
// This compiles but throws an error in the browser

LinkButton lnkBtnProductsOwned = (LinkButton)LeftNav_CustServ1.FindControl("ProductsOwned"); // The Control is visible

lnkBtnProductsOwned.Enabled = false; // Error: Object reference not set to an instance of an object.

View 6 Replies

Forms Data Controls :: UserControl Within Gridview Loses Properties When Usercontrol Events Are Trigered

Jul 17, 2010

This is page load

protected void Page_Load(object sender, EventArgs e)
if (!IsPostBack)
{ [code]...

But in my ascx.cs when IButton1_Click is trigered My name is null

private string _sname;
protected void Page_Load(object sender, EventArgs e)
{ [code]...

View 2 Replies

Web Forms :: Usercontrol Constructor Parameter - Unable To Pass The Value To Usercontrol?

Apr 6, 2010

im creating site with usercontrols. I have repeater, inside it is another repeater with usercontrol. My problem is passing BindedValue to usercontrol.Bindings works fine and binds the value i need but it cannot pass the value to usercontrol. When i type it manually it works, when i bind it, it passes null (!).I've tried get,set, functions (ondatabound, onload, oninit), accessing control from code with no luck. Ive read and tried to do all the google solutions but with no luck. (even with creating usercontrol inheritance)

View 5 Replies

Forms Data Controls :: Same Instance Of Usercontrol In Two Places In Same Page?

Mar 23, 2011

i am using a usercontrol with repeater for custom paging in grdiview. Everything works fine. I am able to display link buttons and able to pull exact records. Now i have a little user friendly requirement. The pager usercontrol should appear at top of grid and bottom of grid. For that i have placed two instances of usercontrol. I am supposed to place same instance of usercontrol in two places so that whatever button click in any instance should happen in all available instances. The issue is i clicked page 2 (link button) in top pager user control. Its changed to selected mode(non clickable) where as bottom remains same, page 2 is clickable. How can i proceed?

View 1 Replies

Create A Usercontrol Instance Programmatically?

Feb 16, 2011

I have a UserControl that I need to add dynamically. I tried to follow this MSDN article, but I'm not having any success....[URL]

The UserControl is basically an image gallery, and it loads some pictures based on an ID. My idea was to make this ID available as a property. Then when I create an instance of the control, I could set this ID and add it to the form.

I added a reference to the control in the .aspx page that will use it, like this:

<%@ Reference Control="~/PictureGallery.ascx" %>

And in the UserControl I added a ClassName like this:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="PictureGallery.ascx.cs"
Inherits="PictureGallery" ClassName="PictureGallery" %>

When I try to create an instance in the .aspx.cs like the article suggests, Dim gallery As ASP.PictureGallery, I get an "Type ASP.PictureGallery is not defined".

The article mentions a namespace, ASP, and I tried importing it to the .aspx.cs with no luck. So, I'm not able to get a reference to the UserControl.

View 3 Replies

Web Forms :: Firing Usercontrol Event From Another Usercontrol?

Aug 12, 2010

I have 2 usercontrol in my .aspx page.


<asp:textbox id="txt" runat="server"></asp:textbox>

<asp:button id="btn" runat="server" text="send" />


Here I have gridview control with checkbox for selection of one or two records. Have one button and when clicking this , i need to get the selected records values and assign this values to the textbox which is in usercontrol1.

View 6 Replies

UpdatePanel Dynamically Loaded Web UserControl Will Disappear After Clicking Any Button Inside The UserControl?

Mar 17, 2011

I've a ASP.Net page (Default.aspx) which will load UserControl (ucontrol.ascx) dynamically into an UpdatePanel. By using UpdatePanel, we believe we're able to prevent the entire page to be posted-back.

My problem is, within the UserControl, we have some form controls, such as inputs and buttons; after the UserControl is loaded, clicking on any button inside the UserControl will cause the UpdatePanel to be blanked. During the investigation, I found that, breakpoints within the Button1_Click() in the code-behind for the UserControl is never reached. Please reference to the code below, this references to [REFERENCE]1.


View 2 Replies

AJAX :: Nested UserControl With UserControl Disappears On Partial Postback

Jan 28, 2011

I have a page with an UpdatePanel with a UserControl in it. That UserControl contains a GridView with a nested UserControl that seems to disappear when the parent UserControl is rebound. I cannot for the life of me figure out why the child UserControl disappears. The code works beautifully on the first load, but any partial postback causes the "Pick" UserControl to disappear.


View 5 Replies

C# - Call Function From UserControl On ASPX From UserControl On MasterPage?

Jan 31, 2011

I have MainLayout.master that has UC_Menu.ascx on it.

I have a page named Customer.aspx that uses MainLayout.master. Customer.aspx also contains a UserControl named UC_Details.ascx.

How can I have UC_Menu.ascx call a function that is in UC_Details.ascx with this scenario?

I've seen a few similar examples, but none that match this type of layout.

View 3 Replies

Web Forms :: Usercontrol Reference To Page Object?

Apr 20, 2010

I am developing a usercontrol, in this case a toolbar. Some of the buttons on the toolbar will interact with other objects on the page which are not part of the toolbar. (In this case a map) So the toolbar code behind wants to say something like this:


My problem is that MyMap does not exist in the design environment of the usercontrol and therefore produces an error when it is referenced. So my question is, How is this typically handled? Can the usercontrol reference another control that does not exist within itself?

View 1 Replies

Web Forms :: Calling Other UserControl From UserControl?

Jul 24, 2010

have a webpage that has a button and 2 userControl placed inside the placeHolder with visible set to false.When run and click on the button, userControl1 will set the visible to true. Now userControl1 is visible and there is also a button inside this userControl1 and when click, will set userControl2 visible to true and hide userControl1. The code below is the code behide for the webpage the do the above task.


Is there a way to do so that when click on the button inside userControl1, is does not show userControl2? I want to do this way is because, the button is for submitting data to database and then will pop up userControl2. When there is an error, only a msgBox will pop up and does not show userControl2.

View 3 Replies

C# - Add Event In UserControl To Button Which Is In Nested UserControl

Dec 8, 2010

I have a UserControl, which contains another UserControl with Button. I want to add an event to that button in first UserControl (parent). I tried to do:

void Page_Init()
var btn = ChildControl.FindControl("SearchButton") as Button;
btn.Click += new EventHandler(this.SearchButton_Click);

but btn is null. How can I do that ?

View 4 Replies

How To Reference TextBox In One UserControl From Another UserControl

Jan 19, 2011

I have two UserControls on a MasterPage. DataEntryUC contains several TextBoxes and DropDownList. NavSaveUC contains navigation buttons. When the user clicks on a navigation button, I will be saving the data entered into DataEntryUC from the NavSaveUC UserControl.

I have a couple of tables in my DB that contain stored procedure names, control names, control types, SqlDbTypes, etc.... that correlate with DataEntryUC.

How do I reference a text box that is on DataEntryUC from NavSaveUC?

I have been working on the following code from NavSaveUC with no luck.

Dim MyControlName = "txtFirstName"
Dim MyControlType = "TextBox"
Dim MyStringValue as String
Dim tmpTxtControl as TextBox
Dim tmpDdlControl as DropDownList
Select Case MyControlType
Case "TextBox"
tmpTxtControl = CType(Page.FindControl(MyControlName, TextBox)
MyStringValue = tmpTxtControl.Text
Case "DropDownList"
tmpDdlControl = CType(Page.FindControl(MyControlName, DropDownList)
MyStringValue = tmpDdlControl.SelectedValue
End Select

View 2 Replies

Passing Business Object Structure To UserControl?

Feb 17, 2010

How do it do this. I have this at the moment



This takes a large INT and returns 4 strings from the BO structure HotelFacilities

If I set the private from string to AccommodationBO.HotelFacilities it is fine

If I set the public from string to AccommodationBO.HotelFacilities it moans because the Set section of the private property is wrong. But the set would be an INt.

All I actually want to do, is populate the BO Structure and passit to the user control using a property in the user control code behind. Is this possible ??

Dim jim As New GetAccommodationPricesBLL

View 1 Replies

User Controls :: Trigger One UserControl Event From Another UserControl Event

Feb 14, 2013

I have page having two user controls. Now I have a requirement for which i have to trigger one user control event from another user control.

View 1 Replies

C# - Register An UserControl In Another UserControl With MVC 2?

Dec 11, 2010

I want to register an UserControl in another UserControl but i have some errors like :

Control '4_txtCount' of type 'NumbericTextBox' must be placed inside a form tag with runat=server.

Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Control '4_txtCount' of type 'NumbericTextBox' must be placed inside a form tag with runat=server And when i add a server side from tag in my UserControl, i never get the error message.

How can i register and use an UserControl in another UserControl without adding server side form tag in UserControl?

View 2 Replies

C# - Accessing A UserControl From Different Usercontrol?

Feb 10, 2011

I am trying to use the already written code which accesses a control from an other control in the following code.

Controls_SearchFeaturedMerchants UCMerchant = (Controls_SearchFeaturedMerchants)this.Parent.FindControl("UCSearchFeaturedMerchants1");

View 2 Replies

Web Forms :: Session Ended - But Server Error/ Object Reference Not Set To An Instance Of Object?

Nov 15, 2010

In the VS2005 environment, when I test my session to make sure the page redirects to the main page (itself) if the session is null, it works. There is no error.

The function I use for this is:


However, when it is in the production environment in IIS 6.0, when the session has timed out, and I then do a postback by doing some slider control, I see the page reload but immediately thereafter, it throws a Server Error exception of : Object reference not set to an instance of object.

Looking at the stack trace, the event occured:

AJAXEnabledWebApplication1._Default.Slider1_TextChanged(Object sender, EventArgs e)

however, why is it that the Slider1_TextChanged event fired even even after during page_load, the page was told to do a response.direct ?? shouldn't the entire page have gone through a full-page refresh life cycle ? why did it continue on to attempt to raise the Slider1_TextChanged event?

View 1 Replies

Forms Data Controls :: Object Reference Not Set To An Instance Of An Object Repeater Control

Apr 21, 2010

can you please help me to brainstorm the possible causes of this error. I've got a paged repeater with localisation bound programitcally to an sqldatasource using a stored proc. I can post code if needs be but it's rather long. I'm looking for typical causes of this error + will make note for future reference!

erver Error in '/WebSite4' Application.

Object reference not set to an instance of an object.
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 233:Line 234: Repeater1.DataSource = PagedResultsLine 235: Repeater1.DataBind()Line 236: doPaging()Line 237: End Sub

View 9 Replies

Forms Data Controls :: Get The Value Of The Id Field In Gridview/Object Reference Not Set To An Instance Of An Object

Feb 1, 2010

I am trying to get the value of the id field in my gridview but I keep coming up with this error when i do selectedValue or selecteIndex

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

How do I get that id? What I am trying to do is when the user select that link it will delete that information from the database. Here's my code:



View 5 Replies

Web Forms :: Error When Using A BasePage Along With A Master Page/ Object Reference Not Set To An Instance Of An Object

Mar 6, 2010

I'm new to programming in ASP.NET, but I'm making my way through Wrox's Beginning ASP.NET 3.5 in C# and VB.NET.

I'm at a section where I'm creating a BasePage. I successfully created a BasePage by creating a new class file in my App_Code folder called BasePage.cs with the following code:


If I run that code everything works out fine. The page loads and all is well. But, if I try to do the same thing to a page that uses my MasterPage.master file, I get the following error:

Object reference not set to an instance of an object.


An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Why is that? In the example code from the book (that also uses a MasterPage.master file), everything excutes and runs just fine. But in my test, I get the above error. I've tried comparing my pages to the books included source pages, but I can't find any differences.

View 1 Replies

Web Forms :: Unable To Read Web.config File/Object Reference Not Set To An Instance Of An Object

Nov 2, 2010

I have a website written in C# that was running fine on one server. We moved it to another server and have a couple issues. I am mainly a VB.NET coder but can do a few things in C#. This is not a project - it is a website and can open it in VS2008 no problem. This is an admin site for the whole website where the user can add customer comments, etc. When logging in, it works fine. I can go to one of the admin pages after logging in and works. If I go to two other different pages, I get this error:

Object reference not set to an instance of an object.


It turns out this is in the main.master page and it is used by the other pages that load fine. The ApplicationTitle variable is set right in the web.config file and like I said, it shows on the other pages.

My question is why would this code work fine for some pages and not two others? All of these admin pages are under a folder called Admin and the web.config file is in the root folder of the website. Its almost like these two pages cannot see the web.config file in the root folder? Why would that be if thats the case?

View 3 Replies

Web Forms :: Error When Converting Session To String / Object Reference Not Set To Instance Of Object

May 7, 2015

I am getting object refernce error at line:if (Session["Tax"].ToString() == "9")

protected void Page_Load(object sender, EventArgs e)
if (Session["Tax"].ToString() == "9")
lblTax.Text = Session["Tax"].ToString();
lblTax.Text = "0";

Is anything wrong I have done?

View 1 Replies

Web Forms :: Returns Object Reference Not Set To An Instance Of The Object Because Of Empty Dataset

Aug 27, 2010

private void FillDetails(string pId, out string Name, out string Address)


I have method called Filldetails(),This method uses stored procedure to retrieve information for product name and address based on productid passed from productdetails table.I am working on globalization project.We have this product information for US country but there is no product information for germany country.So dataset is empty for germany.As result I am getting error object reference not set to an instance of the object.

View 3 Replies

Copyrights 2005-15 www.BigResource.com, All rights reserved