.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Update controls

Posted By:      Posted Date: April 14, 2011    Points: 0   Category :Windows Application


i`ve been trying to update controls (gridview and labels) during runtime. for this i am using delegates.


public void SetControl (int param)


if (Control.InvokeRequired)


                Control.Invoke(new SetControlDelegate(SetControl), new object[] { param });




                this.control.Text = param.ToString();


however the control text value never changes. i am also not getting any error message.

Is it something missing?

Any ideas or suggestions?!


thanks in advance!


View Complete Post

More Related Resource Links

Problem with list controls and update progress template



I have an update panel that surrounds a wizard control which I use in conjunction with a update progress control. Now my update progress control works perfectly, with my animated gif and div tag that lays over my wizard control when the user goes from step to step. However, there is a problem that I am struggling to solve. A number of my steps use controls like list boxes, and when the update progress control fires, the list control is not laying underneath my div an animated gif no matter how high a make my css z-index on the div.

Does anyone have a way of solving this?


AJAX update panel and update progress controls

I have writtena Crystal reports web application, that prompts ths user for parameters and then apply them and exports the report to a folder as .rpt and then display the report. I prompt the parameters on one screen and then display the report on another page. I have the AJAX update panel and update progress controls in the parameter page. When the user enters the parameters and click on ok, I export the report and then loads the report to a session report document and transfer the user to the second page where the report is displayed. I use the following code to do transfer to the seconds page. I have excluded the report load and parameter assign code here.rpt.ExportToDisk(ExportFormatType.CrystalReport, "c:\reports\testrep.rpt") Session("rpt") = New ReportDocument Session("rpt").load("c:\reports\testrep.rpt") Response.Redirect("show.aspx") In the second page I have the following: rptViewer.reportsource = Session("rpt") My problem is this works one time and then stops working the second. What I found out was it comes to the statement: Response.Redirect("show.aspx") But it does not even load the show.aspx page. It stays on the parameter page. There are no errors displayed. I could not see any errors when I debug the application also. And out of the blue it works

Modal Popup controls & Update panel

Dear frnds, I have a Modal Popup controls on the page. This will display some data.     It takes around 10 min to fetch the data to display on the popup control.     Code for displaying the popup control is on page behind.   So problem is that it takes 10 min to come up the popup. No indication till them on the page . All the controls are inside the update panel   Regards, Sajid P K  

How to force update all child controls values (like PropertyChanged but for entire child descendant



We need after event user fired (change at dataContext object) uptade all values binded to datacontext on controls descendant of grid control

¿Its is possible?


Julio Trujillo Leon. Microsoft Certified Professional Developer. .NET Developer and TFS admin. . Please, if my contribution is useful for you press on "useful button" Por favor, si les ha sido útil pulsen en "el mensaje ha sido útil" https://www.mcpvirtualbusinesscard.com/VBCServer/JulioTrujilloLeon/interactivecard

Trouble with update panel and dynamic controls and post back


 I have a page that is mostly dynamically built in the page load of my VB.net code behind page.

The issue is that I made a change to the page and added a button that redirects to a secondary page. When the button is clicked there is a very noticeable lag until the button click event fires because the page is being rebuilt every time.

I had not wrapped the code in the load event in the If not ispostback.... because I have dynamic controls that the user interacts with and I need the page to be rebuilt when the user clicks them.

The dynamic controls are clickable table cells. I did some looking and I found that the RegisterPostBackControl. I thought this would be perfect but, it does not although I maybe using it incorrectly.

Here is the code flow.

Page Load

If not ispostback then


end if


private sub setuppage()

'get a reference to the scriptmanager on the master page

Dim scriptManager = DirectCast

Problems with Repeater Control, Update Panel and the Toolkit controls


Hi Guys,


Having a bit of an issue with the Toolkit controls.

I have a Repeater Control nested inside the Update panel, the repeater item template contains a multiview control allowing users to flick through seperate bits of information. This was working fine the async update was perfect, no issues.

I have then decided to include the rating control to one of the views. problem is now everytime i want to change the view it causes the whole page to postback.  

Attached is the code.

Any help is much appreciated

Binding WPF Controls to an Entity Data Model

In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

Custom Controls in C# .NET

Embedding user controls in a Windows form is just like adding a simple button or text box that are already provided with .NET. These basic controls were written essentially like you code your own controls. Typically the controls you design are to be used in multiple forms or to modularize your code. These reasons help reduce the amount of code you have to type as well as make it easier for you to change your implementation. There should almost never be any reason to duplicate code because it leaves a lot of room for bugs. So, implementing functionality specific to your control in the control's source code is a good idea. This reduces code duplication as well as modularize your code, which is a good programming guideline.

Accessing the different controls inside a GridView control

how we can access a particular control which resides inside a GridView control. In this article I will show you how you can access different controls inside a GridView control. We will see how we can access a TextBox control, a DropDownList control and a ListBox control. If you are working with ASP.NET 1.X then you might want to check out my article Accessing Different Controls Inside a DataGrid.

Using ASP.NET 3.5's ListView and DataPager Controls: Displaying Data with the ListView

Prior to ASP.NET 3.5, developers who needed to display a set of records could choose between the GridView, DataList, and Repeater controls. The GridView provides rich data features, but has a very boxy layout; the DataList and Repeater allow for a more flexible layout, but lack the "point and click" data features found in the GridView, DetailsView, and FormView controls. The ListView bridges the gap between layout flexibility and built-in data features.

This article, the first in a series of articles on the ListView and DataPager controls, looks at the ListView's many available templates and illustrates how to display data. Read on to learn more!

ASP.Net Gridview Edit Update Cancel Commands

In ASP.Net 2.0, GridView Control also provides the functionality to edit and update the data retrieved from the database using CommandField template. You can cancel the action using Cancel Command of the CommandField. GridView consists of events that can be used to perform the actions like edit, update and cancel upon the Data items displayed in the ASP.Net GridView Data Control.

How to format and update GridView and DataGrid rows using JQuery

The behavior described in this question is as expected. When you set text of a cell in grid, it directly affects HTML that is going to be rendered. When you set text value of a cell, it means that you are setting innerText of the cell. The column that GridView creates for command fields (Edit, Delete and Select) are a (anchor) or button elements. So you can see what will happen if you set text value in that cell. It will wipe out those link or button controls and replace them with simple text string.

Binding WPF Controls to an Entity Data Model

In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

Working with DropDownList and ListBox Controls in ASP.NET

"In my application i am using dropdownlist to display all categories from a table. When the user clicks this control I display all records in that category. Category table also contains column called color.

I wanted display some categories in dropdown list different color and others in different color using ASP.NET."-Anonymous

Update Vs SystemUpdate

Many of you might noticed that share point ListItem has Update() method as well as SystemUpdate().

What is the difference between these two methods and why MOSS has two different APIs for updating an ListItem

How to programmatically add controls to Windows forms at run time by using Visual C#

Create a Windows Forms Application
Start Visual Studio .NET or Visual Studio 2005 or a later version, and create a new Visual C# Windows Application project named WinControls. Form1 is added to the project by default.
Double-click Form1 to create and view the Form1_Load event procedure.
Add private instance variables to the Form1 class to work with common Windows controls. The Form1 class starts as follows:

Dynamically Create Controls in ASP.NET by Using Visual C# .NET

This article demonstrates how to dynamically create a control for an .aspx page. The sample project does the following:
Creates two TextBox controls.
Verifies that the contents (TextBox.text) and the attributes of the TextBox are saved across posts to the server.
Illustrates handling events that are posted by a dynamically-created control
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend