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

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

how to change button backcolor property on a form from a class file

Posted By:      Posted Date: September 23, 2010    Points: 0   Category :.NET Framework

Hello friends,

I am having a problem of updating the main form button backcolor property from another class. I have attahced the code. Please tell how can i rectify this problem.

PopUp is another class, in which i want that when ToolStripDropDown closes it change the form button BackColor from Orange to WhiteSmoke.


public partial class PopUp : ToolStripDropDown


        public PopUp()





        protected override void OnClosed(ToolStripDropDownClosedEventArgs e)


               Form1 f1 = new Form1();

              // f1._pushed = false;

       f1.Controls["button1"].BackColor = Color.WhiteSmoke;





It seems that this line works, i checked it using MessageBox it changes the backcolor property but it does not updated to the form displayed on the screen. 

Can anyone help me

View Complete Post

More Related Resource Links

catch the html button click event on a class file including html text box value.


I want to catch the html button click event on a class file including html text box value..

<p><input name="" type="text"  value="Enter Name*"/></p>
<p><input name="" type="text"  value="Enter Email*"/></p>

  <input name="Input" type="submit" value="Submit" />

plz tell me how can i do this..

Change a button's Foreground property using the VSM


I asked a question previously here and just realized I could probably rephrase it in a more compact way:

Using the visual state manager, how can I change the Foreground property on a button? That is, in the button's style "Pressed" Visual state, is there a way to reference the button's Foreground property (as opposed to properties on elements making up the button template itself)?

<Style TargetType="{x:Type Button}">
 <Setter Property="Template">

Button Enable Property Web Form


I'm trying to set the enable property for a button to true when a checkbox is checked with the Check Change Event using VWD Express 2010. The enable property for the button was set to false within the button tag and auto post back for both controls is set to true. The checkbox is nested within an AJAX Accordion Pain and the button is outside the update panel.  When I run the code in debug the button enabled property is being set to true but the actual button never becomes active on the form. I tried putting the button tag within the update panel start and ending tags but get an error that it is not a recognized control when I build the site.

This should be a simple process but I guess I'm missing something.  


Protected Sub AuthorizationCheckBox_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles AuthorizationCheckBox.CheckedChanged
        If AuthorizationCheckBox.Checked = True Then
            Me.SubmitFormBtn.Enabled = True
        End If
    End Sub


how to specify file name and close the info path form on custom submit button?

i have submit button in the form once i click it must ask to enter the file name and once i given it it must close the particular browser tab.

how to specify file name and close the info path form on custom submit button?

i have submit button in the form once i click it must ask to enter the file name and once i given it it must close the particular browser tab.

How to change a text color in window form button!



I got an Export button in the form. I like the button text color that change from original black to white when I press it. I can change the background color of the button, but I am not sure how to change the Export text color to white. Please help. Thanks in advance.

Change the order for upload: 1st fill the form and then upload the file



I would like to change the order for upload: 1st fill the form and then upload the file.

THanks in advance


abstract away the source of the connection string using a class with a static property.

ASP.NET provides a configuration system we can use to keep our applications flexible at runtime. In this article we will examine some tips and best practices for using the configuration system for the best results.

The element of a web.config file is a place to store connection strings, server names, file paths, and other miscellaneous settings needed by an application to perform work. The items inside appSettings are items that need to be configurable depending upon the environment, for instance, any database connection strings will change as you move your application from a testing and staging server into production.

Let's abstract away the source of the connection string using a class with a static property.

How to change the default page base class?


I've tried setting the <pages pageBaseType="DynamicWebPage" /> value in web.config, but when I response.write out the page type, I'm still getting Microsoft.WebPages.WebPage.

I'm simply trying to sub-class WebPage and add some additional functionality such as a dynamic PageData dictionary similar to Phil Haack's dynamic ViewData dictionary.



Change Button Text in Multi Language Website


Hi i developing multi language website

using Master pages

everything fine

Page_Load i set the Text property of Button Control from Resource file

like this

Button1.Text = GetLocalResourceObject("Button1")

then in the button click event i cnage the text of the Button control

Button1.Text = GetLocalResourceObject("Button1_new")

but the text doesn't change and no error messgae

what is the problem how to solve this


Make sure that the class defined in this code file matches the 'inherits' attribute, and that it e


Here is the page directive for the page that throws the error:

@ Page language="c#" Inherits="University.AspNet.Index" CodeFile="Index.aspx.cs" %>

The code behind file Index.aspx.cs starts like this:

using University.Framework.UI;

namespace University.AspNet

public partial class Index : University.Framework.UI.HomePage

The code behind is extending this HomePage class, which is in turn an extenstion of another class University.Framework.UI.Page, which extends the System.Web.UI.Page class.

Am I misusing the I

change image button image


i am making a web form with a VB code behind.  on the form I have a down arrow imageButton that when pressed hides certain data.  what i want to do is change the button to an up arrow and vice versa whenever pressed.  i have both images loaded onto my project already.  any suggestions.

thank you

change calendar date backColor base on data from db


I want to  change calendar date backColor base on data from db,  I only have vistual 2003 !

on mean time I have

<asp:DataGrid id="DataGrid1" style="Z-INDEX: 102; LEFT: 23px; POSITION: absolute; TOP: 271px"
		    runat="server" Font-Size="XX-Small" Font-Names="Verdana" AutoGenerateColumns="False" Visible="False">
           <asp:BoundColumn DataField="subject" HeaderText="Title"></asp:BoundColumn>
           <asp:BoundColumn DataField="posttimestart" HeaderText="Post date"></asp:BoundColumn>


Sub DayRender(ByVal source As Object, ByVal e As DayRenderEventArgs)
        Dim i As Integer
        For i = 0 To DataGrid1.Items.Count - 1
            If (DataGrid1.Items(i).Cells(1).Text = e.Day.Date) Then
                e.Cell.BackColor = Color.DarkOrange

            End If

    End Sub

when I click the day wich have data in db it change  color , but I want the page load it change color !

Thank you!

Insert image into Infopath form and save to SharePoint as PDF file


I have an InfoPath web-enabled form in MOSS 2007, that is integrated with a K2 blackpoint process for an approval workflow.

Once the form (a Purchase Order request form) has been approved in the K2 workflow process, I switch the form view to a "print-friendly" view for the requestor to view from the browser.  However, now I need to go one step further with this scenario:

1) I need to somehow insert/embed an image with the scanned-in signature of the approver (likely stored in a SP doc library) at the signature line section of my form.  Also, what are the security requirements for storing such images, but not granting all users access to these (e.g. only services accounts that need to access this for embedding into the form, etc.)?

2) Then I need to convert this final "print-friendly" view of the form (with the signature image) to a PDF document so that I can store it in SharePoint (and email it to the requestor using K2's email event capabilities).

Can anyone help me with a solution to both of these requirement, or point me to some resources for this (even 3rd party components are open-game).



Infopath 2007 print view in browser enabled form with Print button


Hi i create a  print view brower enabled form in Infopath 2007 with header and footer. In Infopath works fine. Margin was ok, header and footter to. But then i try to print this browser the margin, header and footer it changes to default setting of browser ? I try also create a print button in form with VS 2008 code, but method :

this.print(); not working.

It is possible to print the "print view" in browser as the same like in Infopath 2007? Does anyone have the code how to create a print button in C# on browser enabled form?

Button in a form that does not submit


I've been trying to figure this out all afternoon but my google-fu seems to be failing me. I'm setting up a page with a fairly large form, which has one field that is going to require some kind of popup page that will allow the user to perform a lookup. At the moment I'm only prototyping the page so I'm actually only attempting to a the button up to fire an alert when the button is clicked instead of generating a lookup screen. However it seems that no matter what I do the button causes the form to submit.

I remember one of the very first ASP .NET beginner videos I ever watched went through configuring a button to perform actions without submitting, but I can't seem to figure out which one it was.

How do I find the file path from a namespace.class name?


I'm programatically looking ito a .aspx file and getting the file class name declared in its CodeBehind. For example, when analyzing myFile.aspx I read in its Page Directive and found its CodeBehind equals "myApplication\myPage.aspx.vb". Then I use the code below:


Dim Assm As System.Reflection.Assembly = System.Reflection.Assembly.LoadFrom("myApplication\bin\myApplication.dll")
Dim ClassType As Type = Assm.GetType("myApplication\myPage.aspx.vb")
' myBaseType = "myApplication.Forms.BasePage"
Dim myBaseType As System.Type = ClassType.BaseType


Now I want to read the BaseFile (class = myApplication.Forms.BasePage). However, to read in this file, I need I need to get its full path instead of its namespace.class hiearchy. In this case, the BasePage is wrapped in a different namespace declaration thus I cannot just change the '.' to '\' in order to get the path.

How can I get the path of BasePage so I can read it? Thank you - Frank

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