Asp.net - Programmatically Change Custom Attributes Of User Control In Code Behind?
Jan 21, 2012
I have a User Control which is a customer input form.I'm working on a sales system, when generating a sale, the customer data is populated by a Javascript Auto Complete, but when loading a saved sale, I need to paste a User ID into the control programatically.
<controls:customerDataForm ID='customerForm1' partExchangeMenu="true" showBankDetails="false" customerID="****" runat='server' />
Renders my control on the page within the markup of the parent document (in this case it's called newSale.aspx)In the code behind in newSale.aspx.vb I need to be able to programmtically change the value of the Controls customerID attribute. I can't seem to do it.This is what I have done, following various Googling attempts, but it is always leaving the customerID as zero
Protected Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Init
customerForm1.customerID = "0" '// default Customer ID if no invoice number
If Request.QueryString("invno") <> "" Then
[code]....
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Mar 31, 2010
I'm trying to use ResolveUrl() to set some paths in the code behind of a custom ASP.NET user control. The user control contains a navigation menu. I'm loading it on a page that's loading a master page.When I call ResolveUrl("~") in my user control it returns "~" instead of the root of the site. When I call it in a page I get the root path as expected. I've stepped through with the debugger and confirmed, ResolveUrl("~") returns "~" in my user control code behind.Is there some other way I should be calling the function in my user control code behind to get the root path of the site?
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Apr 12, 2012
add a custom field and/or attributes in active directory (whichever their called) for a user. For instance, im wanting to add a field for employee id but can I also get this field to show up in active directory users and computers to see if its working correctly? Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - "Sherlock holmes" "speak softly and carry a big stick" - theodore roosevelt.
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Mar 27, 2009
I am trying to build a tournament bracket application. In order to build the application efficiently I would like to make a user control "GameControl" that represents a game and give it attributes that represent the names of the competitors "TeamNameA" and "TeamNameB" ,an attribute "Winner" to represent which team should move on, and an attribute "NextRoundGame" that assigns another instance of the user control so that it can assign the "winner" to one of the "TeamName" attributes of the next round in the competition. If the controls were native to VB I feel like I could do it easily (I have only spent about 30 hours self teaching/tutorial following) but I can't seem to find out how to pass values to custom attributes of custom user controls through code.
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Apr 2, 2010
this questions has be answered partially, but I can't find any full tutorial for this problem.I created my own user control (an advanced list with columns). Each column has different attributes like width, colour and text.I want to able to add this user control onto a form and select/edit the different attributes of each column. Hence, for each column in my user control (these columns are created beforehand, no columns can be added or removed from it) there should be a property in the property-menu. Each of these column-properties should be expanded (like the normal size-property in most default vb-controls that can be expanded with the little plus to show the width and height individually.What i mean by this, is: In the property-menu there should be attributes like Column1, Column2, Column3. Each of these attributes should be expanded to show the attributes like width or colour.
Currently I have different properties for different values of the same column, like Column1Wodth, Column1Colour, etc, but I want to group this under one value Column1.I think this is quite an easy solution, but forgive me, I spent more than 4 hours on google, but couldn't find a proper solution.
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Feb 14, 2010
I created a custom control and add it to a form programatically.
The user can add and move them all over the form.
The problem is when I want to clear the form of my user control I don't know how.
I created an array of my control called ctlCorkNotes
Say I create ctlCorkNotes(1) and now I want to delete it.
How do I do this so it is gone and would have to recreate it to show up again?
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Oct 15, 2011
Is there a way to change the ftp password for a certain user programmatically?
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Jul 30, 2010
1. I have a DataGridView box, that is connected to a MySQL database via the 'Data Source'. I am trying to do the datagridview1.rows.add("info here"), however i receive an error i cannot do this programmatically. I DO know the code to post to MySQL via the "insert into" la la la.However, I was curious if I can do this via the datagridview a bit..easier/simpler, such as a "datagridview1.rows.add(stuff)" sorta thing.
2. I am attempting to make a custom control, and as with ANY control, they have their.. settings. Example, a textbox, or label, has so you can set the Text. and color, etc.Others, have it (such as datagridview) have the little icon on the control itself, where you click it, and it opens a small window with settings.
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Jul 26, 2010
I have a VB.NET module that prints out a series of Crystal and PDF documents as a packet. I need a way to temporarily change the user's default printer to the network printer for the PDF report (the Crystal reports are already redirected). Once the module has done its job, I want the module to return the default printer back to its original setting. Since Adobe Reader only works with the default printer, and there does not appear to be a way to redirect that, I need to change the deault for the duration of the module. I tried the following code, but it still sends the PDF output to the local printer.[code]...
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Nov 12, 2009
I need to know the answer to this. I have a standard asp control (CheckBox) and I want to bind some data to it. I also want to be able to access it via vb in an easy manner. Can someone tell me quickly if this is possible? An example of what I want to do is below:
Dim myValue = TestCheckBox.Attributes("MyAttribute")
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Jul 27, 2010
I have attached the 2 docs here which explains wht prob i m facibng in my proj its just piece of code out of my big proj.
How to change a particulr value of one text box control of one particular form from another form?
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Apr 26, 2010
I have a vb6 program that could change my password at local computer.
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Jun 5, 2012
How to add a control like picturebox programatically and Allow user to move it with mouse? on google but cant find anything. Thats why I am here. In my application user creates a picturebox and a label at runtime by selecting a file from drag drop. User can create as many files he wants. But the problem is that I dont know that how to move both picturebox and label to change their location in a flowlayoutpanel which contains these controls with mouse. I know that how to add a control like picturebox programatically but dont know how to move it. I add picturebox by:
dim picturebox as new picturebox
flowlayoutpanel1.controls.add(picturebox)
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Apr 29, 2010
We have a ASP.NET web application written in VB.NET where we build content programmatically during the Init event.We make extensive use of user controls, building them on the fly, and I now want to start including SilverLight content.Is there an easy way of embedding a SilverLight application in a control, and then instantiating the whole thing in code, in the same way as you'd programmatically add ordinary ASP.NET controls to a page?The SilverLight component itself works fine when added to a page using the <object> tag but I really want to be able to reuse it elsewhere in code.Since I'm expecting use of SilverLight to increase in our application, and the asp:Silverlight control seems now to be deprecated, I'm looking for an alternative way of wrapping the content.
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Feb 25, 2012
I'm adding web user controls to a page dynamically. Using the LoadControl method that only takes a virtual path pointing to the .ascx works pretty nicely. However, the overload of LoadControl that takes a type and an array of parameters is causing me some headaches. The web user control is instantiated as expected, but the controls contained within the web user control are null and I get an exception as soon as I try to work with them. Strange, because it's working when use the first version of LoadControl.
The web user control, simple, with a Literal control:
<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="MyControl.ascx.vb" Inherits="MyControl" %>
<asp:Literal ID="myLiteral" runat="server"></asp:Literal>
The controls' code behind:
Public Class MyControl
Inherits System.Web.UI.UserControl
Public Property Data As MyData
[code]....
And the relevant code from the .aspx from which I'm trying to dynamically load the control:
Private Sub Page_Init(sender As Object, e As System.EventArgs) Handles Me.Init
Dim x = LoadControl(GetType(MyControl), New Object() {New MyData With {.ID = 117}})
Page.Controls.Add(x)
[code]....
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Sep 1, 2011
Is there a way to access wordpad programmatically so I can set attributes like font, bold, text justify, printer orientation etc etc ? So far, I'm able to launch wordpad from withing VB6 and work with its features.
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May 10, 2011
I've got a page (aspx) that contains a usercontrol (ascx).On postback of the aspx, I'd like to read some control values in the ascx. So upon reading some good articles, I created an event in my aspx that fires on postback.The event handler is in the ascx, and simply writes the values I'm interested in to the viewstate so that the parent page can read them.The problem is my event handler never gets hit, even though I see the event is raised as I step through the code. So my code bombs when trying to read the viewstate (which is empty)[code]Oh, did I happen to mention I'm dynamically loading the ascx? :)
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Oct 28, 2011
I have a component class that inherits a user control class and i'm trying to inherit from that same class in a new class.public class B inherits class Unfortunately, I get an error pointing to the .g.vb file saying:Base class 'System.Windows.Controls.UserControl' specified for class '...' cannot be different from the base class '...' of one of its other partial types When I swap the "Inherits System.Windows.Controls.UserControl" with inherits from the base class in .vb files the program compiles but when I try to access any of the components I get an error saying "Object reference not set to an instance of an object."Why is it doing this? it's as if the my sub class isn't inheritingUserControl method at all.
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Jun 11, 2009
I have created a custom control that is included in a control library that is referenced by a VB Forms application.
When I modify the control, and have the application open in a VS window, VS usually asks me if I want to reload items that have changed.
However, a couple of times, it has not asked me this, and when I go to open the form that contains the modified control, I get an error window warning me that if I ignore the error message and continue, then I risk making VS unstable. I've learned to ignore this error message, continue, and immediately save the form to a new file.
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Feb 23, 2012
i do make custom button component with the below code..
Imports System.Drawing
Public Class AnsBtn
Inherits Windows.Forms.Button
[Code].....
After building the button class i import the dll to my project.
how i can switch between the images to set it as the current background image.
" Answerbtn1.BackgroundImage = ........"
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May 5, 2010
How to programmatically change foreground color and make bold text in individual cell location on DataGridView control (Visual Basic)?
I use "dgMatrix.Rows(r).Cells(c).Value = x" to assign individual numeric values to individual cells in a DataGridView control. My question; is there a similar way to change foreground color and make bold the text in this cell, by specifying the individual row/column cell location?
For example; for cell (row 3, col 5) in the DataGridView make text in cell say red and bold or blue and bold so as to highlight and distinguish individual cell contents. As needed, I will also need to reset these properties (foreground back to automatic/black and font from bold back to regular); the reset could be done globally to the whole DataGridView as opposed to indiviaually by cell.
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May 31, 2010
I'm trying to build a dial control as a custom user control in VB.NET. I'm using VS2008.so far I have managed to rotate image using graphics.rotatetransform . however, this rotate everything. Now I have a Bitmap for the dial which should stay stable and another Bitmap for the needle which I need to rotate.so far i've tried this:
Dim gL As Graphics = Graphics.FromImage(bmpLongNeedle)
gL.TranslateTransform(bmpLongNeedle.Width / 2, bmpLongNeedle.Height * 0.74)
gL.RotateTransform(angleLongNeedle)[code].....
As I understand it, the image of the needle should be rotated at angle "angleLongNeedle" although i'm placing the rotated image at 0,0. However, the result is that the Needle doesn't get drawn on the control.
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May 17, 2010
I created a custom user control named "XYZ" and It is avaialble at the toolbox menu in the design mode and I can drag and drop it to a vb.net Windows form. What I really want is to dynamically to add this user control to the Windows form during the Windows form load event. Actually I want to add this user control to a "split container" named "sc_1" on the tab page named "tp_1" on a tab control named "tc_1" on a Windows form. What is teh vb code to add a user control to a Windows form. I am using vs 2005 and dotnetwork v2.0.
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Nov 13, 2010
I made a custom progressbar as a user control. And I have only been working with forms 'n classes. As you all know, when you create a component in class, it gives you the dll file for the custom component or whatever you made so you can use it on any program. On my custom progressbar, I don't know how to get the ocx or dll file so I can use it on my other programs. OR.. if this is even possible lol. If you could help me on this, that'd be great. And I don't know how to make a custom progressbar out of a class, only user control, so if you could teach me how to make a progressbar out of a class, then that'd be awesome too.
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Oct 15, 2009
How to create custom events for contol. i have created a user control mytextbox & i am showing some properties of textbox & now i want to expose user control events
I am showing Following properties to user
CODE:
How to expose Events
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Nov 11, 2009
I have created a base class for some user controls, then I created controls that inherit this class. This is so I can CTYPE the inherited controls back to the base class and refer to properties, methods and events in a common interface. The base class declares has some Public Event BLAH(Sender as object, e as EventArgs) declarations. The derived class then has Public Shadows Event BLAH(Sender as object, e as eventargs) declarations. My parent form adds handlers for the BLAH event. When the derived class fires the event, though, it does not get raised to the parent form.
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Jan 16, 2010
I had this new idea for a user control Sliding Bar/Panel. See screenshot. So I quickly whipped it up but I've got this problem that I cannot figure out why it does not work. Because I wanted to make it nice and tidy I desided to use a Class (Header) and created a TypeConverter (HeaderConverter)
Code:
Public Class HeaderConverter : Inherits ExpandableObjectConverter
Protected SortOrder() As String
Public Sub New()
SortOrder = New String() {"Text", "Depth"}
End Sub
[Code] .....
and goes to the RaiseEvent but nothing happens Why?
I know I could put properties on the Container control to access the ctnbutton Control that is embedded into the control but I thought this might be a nicer way.
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Feb 10, 2012
I have a user control (SomeUserControl), that I am using in a Main Window. I write my application entirely on SomeUserControl, and Main Window is hosting SomeUserControl and nothing else.
Right now I have a shutdown button (in SomeUserControl), that is supposed to close the Main Window. The reason for this is that I do not want anything from SomeUserControl to close the application itself, but to fire an event from SomeUserControl, and Main Window receives it, and Main Window will close the application instead of SomeUserControl.
How do I do it? I am not familiar with the concept of creating and handling custom events, so if someone could explain it in words and in code as an example, I will be very grateful to you!
Edit: Here's my code so far.
(in Window 2)
Public Event CloseApp As EventHandler
Private Sub CancelButton_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles CancelButton.Click
DialogResult = False
[Code]....
I want to close the application when I click cancel in Window 2, but I don't want to do it in such a way that Window 2 closes itself, but by sending some notification to Main Window, and Main Window closes the application.
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Aug 25, 2009
I was thinking to put attributes on BLL classes properties which ever are mandatory and I'm successfully able to retrieve the attributes also. But, not I also want to check the value of propeties. How I can do that:[code..]
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Oct 1, 2009
Im currently working on my first n-tier application. Im trying to validate the fields and properties in a class file and return a list of the violated business rules.I have the Custom Attributes built and in place, and the Validation method but its not working.
I created a test class with 1 field that has 4 custom attributes on it. I made sure that atleast 1 rule was violated by setting the value to either null or less than the required characters.Cant get this thing to validate for the life of me, keeps on returning 0 violations.
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