On my custom control I've added a Property 'DisplayMode' that, at run time, does a great job of showing or hiding different sets of the standard controls. But, at design time - no matter what I seem to do, my control shows all of the child controls associated with it
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Let's say we have a composite web control with a combobox and a textbox. Is it possible to build into the control functionality such that when the text in the textbox changes, it posts back and adds the value as an option in the combobox?
I know that I could add an "onchange" handler to the textbox and make something work with Javascript, but that's not really what I'm looking to do. Is there a way to just put like:
CODE:
In the web control code and it connect to the TextChanged event of the textbox?
I need some of my initialization code to be blocked off if I am in Design Mode. This code is ran in the new method of the form, so it runs before the DesignTime Property can be set. Is there, or is there a way to setup, a compiler constant which indicates whether or not you are in Design Time. The Debug Constant doesn't work because when I run the application in Debug mode I want it to run
View 14 Repliesi have to port some projects to .net and of course rebuild some custom controls i made over the years.I have a control based on a simple panel and doing some drawing stuff on it.When the control is thrown on a form, i just want to draw a text with the controls name (<GroupPanel1>).But accessing the controls <Name> property always returns me an empty string.In the designer the control is named correct with <GroupPanel1>.
View 5 RepliesCreate composite and custom grid control in ASP.Net 2008 or above
I need to create composite control . My control like one "div" inside that div one Gridview control.
I'm trying to make a composite application.Lets say there are two regions with a view in each that interact with each other via drag and drop, view A contains a list of tasks that view b (which contains a list of People) doesn't really know about.When I select some tasks in the list from view a and drop it to another list maintained by view b which module should know what happened? does the module that maintains the tasks need to know about the module that maintains the people, or vice-versa? Where should I start?
View 4 RepliesI want to be able to get an instance of a class based on two fields in that class. I was hoping to use something like a dictionary, because I thought indexing would be the best for performance. Should I just use LINQ or go back to a strongly typed dataset? Here's an example of what I'm trying to do[code]...
View 2 RepliesI'm trying to create a composite control that will look like a ComboBox with a TreeView style. I'm new to this topic and I have an urgent need to create such control. I know it's not an easy task but please I need your advice to complete what I already started to build.My approach was to combined a TextBox, button and a treeview into a UserControl and make them work together as one control to achieve the control that I'm looking for (A ComboBox with a Treeview style).
So I started by creating a new windows forms control library project and I added a text box and a button as a starting point. The text box will display the name of the selected node text of the treeview and the button will show the treeview under the text box when the user click on it.
Now I'm facing tow problems with my custom control:First when I drag the custom control to a test form the resizing of the control doesn't work properly even after I used the anchor property of the text box and button controls. If I try to resize it horizontally its working find but it's not vertically.
Second I don't know how and where should I place the treeview control and how I'm going to show it exactly under the text box when the user click on the button and hide it when the user click on one of the treeview nodes.
VB.NET .NET 3.5 I have an aggregate class called Package as part of a shipping system. Package contains another class, BoxType . BoxType contains information about the box used to ship the package, such as length, width, etc. of the Box.
Package has a method called GetShippingRates. This method calls a separate helper class, ShipRater, and passes the Package itself as an argument. ShipRater examines the Package as well as the BoxType, and returns a list of possible shipping rates/methods.
What I would like to do is construct an Interface, IRateable, that would be supplied to the helper class ShipRater. So instead of:
[Code]...
However, ShipRater requires information from both the Package and its aggregate, BoxType. If I write an interface IRateable, then how can I use the BoxType properties to implement part of the Interface?
I have a dictionary that I want to access with a key that is the combination of a string (AcctNum) and a date (BalDate).It seems to me the simplest approach is to create the key by simply converting the date to a string and concatenating:MyKey = BalDate.ToString & "|" & AcctNum
I know I also have the option of creating a composite key by writing a separate class and overriding GetHashCode() and Equals() a la this solution. To me, the concatenated string is a simpler, if somewhat less elegant, solution. Am I missing some compelling reason why I should go with the composite key class approach?
This lookup is the crux of the project I am working on, so performance is my main objective (with readability a close second).
I have two properties ("FIRST_NAME" and "LAST_NAME") I need to access as a single property (e.g. "FULL_NAME"). Is there a way for me to add a property to my entity model that contains the combine value of FIRST_NAME and LAST_NAME?
View 1 RepliesThis should be a simple problem to fix, as it uses the same way I fixed my last problem with FooControl (below).
Basically, I want to add a derived validator I made to this composite control. It works fine but on postback it just disappears in the markup, making me think it's lost its ViewState.
I am probably doing something wrong with instantiating it, but I've tried setting only the ControlToValidate, moving things around, and nothing works.
I've provided some surrounding code to see what's working and then what's not.
Private FooControl As IFooControl
Private Validator As MyValidator
Protected Overrides Sub CreateChildControls()
[Code].....
How to create composite grid. ie , i need all the features of gridview in the Framework 3.5 and above,but also need to include some other functionality to that grid.please suggest me what to do . if possible please share sample code.
View 2 Repliesi have a project where I need to concatenate strings from 4 different tables based on a sequence of numbers. I created a 5th table that holds the number sequence and dictates in what order the strings get appended. I have created primary keys on the tables, but 3 of the tables are composite primary keys. I have written up to where I start referencing the primary keys, but am not sure how I should reference the keys on the actual tables. I saw some examples for creating composite keys from an array which I did. The main questions are did I declare the composite keys correctly, am I creating the composite key reference from the array correctly, and how should I reference it all to append to the stringbuilder variable.
[Code]...
And yes I kn ow it would be easier if I used Strongly Typed Dataset, but this is a clr sql stored procedure and have not found any examples on how to add a .XSD to a stored procedure. The add item option is not available, besides a bunch of typing
I am rather irritated at this. I have no clue why looping through controls on a form and in groupboxes leaves out 75% of the controls.
Here's the code I have:
Dim settings As String = ""
Dim gbControl As Control
Dim gbbox As Control
[Code]....
I want to have setting save all settings to an ini file, and not have to reprogram the saving routine when I add a group box or control. At random times, any number of controls can be disabled, checkboxes can be checked and unchecked, radiobuttons can be checked and unchecked. Regardless of the state of the control, I want the control to show up in the loop. But they don't. Only controls that are enabled and only checkboxes that are checked, every other control state is ignored. That's crap, and is definitely not what is needed by any programmer of any type. We're capable of determining if a control is enabled, hidden, checked, visible, and otherwise.
How do I get the controls to be included in the loop regardless of their state?
How many controls can I have before I should start looking at user defind controls because of too many controls making my program go slow?
View 4 RepliesI am trying to cycle throught the lables on my form but it would appear that I am missing quite a few labels... I have a total of 69 lables on my form and I only get 5 hits on the msgbox.
Dim ctl As Control
For Each ctl In Me.Controls
If TypeOf ctl Is Label Then
[Code].....
I have a TypedDataTable called CamerasDT which has a composite Primary Key of GroupId and CameraId. I want to use TypedDataTable.Rows.Find(key as object) to return a specific row by GroupId and CameraId. I don't seem to be able to find a way to send primary key to the find function.
View 1 RepliesHow do I overlay a control that is transparent over another one without showing the picture behind it? I want to put an image in a picturebox and the draw several controls over it that are invisible. To make a interactive adventure game
View 11 RepliesWe are binding most of our text boxes and dropdown boxes to a BINDING NAVIGATOR (with a DATA SOURCE of a DATA TABLE).When the BN is clicked through the text boxes all change immediately.We need to use some non-bound controls as well.First one is 4 radio buttons that when clicked will change a single value in a DATA TABLE.What would be the best method to do this? Should I track when the CURRENTCHANGED event occurs on the BINDING NAVIGATOR.I'm thinking that I could trick this by BINDING the SINGLE FIELD to a HIDDEN TEXTBOX and when that textbox CHANGED event occurs mess with the radio buttons and visa-versa.
View 5 RepliesI have a form with MenuStrip, ToolStrip & StatusStrip. Placed a panel with a 5000 x 7000px image and scroll bars are on form and scroll the image fine. Problem is that all controls appear to have changed size to size of image and also scroll with it horizontally. When scrolling vertically, the image covers up the menu and tool strips. How I can keep the controls on top so they don't attach to the image in the panel?
View 2 RepliesWhen I copy controls to a different form and run the program, they do not show up on the form, how do I fix this? They also do not run with the form.
View 1 RepliesI've hit a roadblock and really need help with looping through tabconrol's tabpage's, getting each tabpage's parent name and richtextbox control's text value. I have a ctabcontrol that has ctabpage tabpages, which also have Usercontrol's on the body of each tab. I developed a FindAll to search through each openned tabpage's richtextbox in the mdi parent container form. However, I cannot get the for loop to produce any values for the controls. All values are 0. The richtextbox.text value is empty. I even tried to produce a value with TabControlCollection to no avail, it shows 0 tabs in the collection even though I have 3 tabs open in the mdi parent container. How can I get the actual controls and values from other tabs so I can evaluate them in my Find tabpage functons?
[Code]...
If I have two instances of the same form open, and one is on top of the other and I want to go to the one on the bottom, I have to click the form to bring it to the front.. I changed this so that if i click the panel(which represents the forms background) I have it bring it to the front.. But now I am having the issue where I click a control in that panel it wont bring it to the front.. So i know how to do this.. I can make a procedure handle all the controls onclick events by typing each controls name.click event
View 33 RepliesI can't use the normal method, my controls (picture boxes) names contain numbers such as 00, 01, 02 etc which corrispond to my multidimenional array.
I'm attempting change the picturebox's values in a for loop via the counter in the loop, for example:
For i = 1 To 4
PictureBox(i).enabled = False 'Picturebox1 will be the first one(counter starts at 1)
Next
I basically need to access each one as I would with an array, I can't type the full names out, can only refer to them via their names + counter number because I don't know what control name I would be dealing with at that time in the loop.
The function below will be called from another thread. So the control themselves will have to be invoked so that the correct thread that created them can change the properties.However, as I have many controls that need to be updated. I don't really want to write all those delegates for each one. I have done one below. [code]
View 1 RepliesWhat i have done is place a webbrowser control on a form, when i maximize the form the webbrowser stays the same size it doesn't maximize with the parent form, i can't figure out how to do this
View 1 RepliesI have Winforms application that holds dozens of controls.Now I'm planning another functionality where I have to move some of the controls and put others instead of them.I have to let the users to choose during runtime whether they prefer ver A or Ver B (means the other controls).
I have doubts what's the best practice to replace the controls.Should I hide the controls and replace them by others in runtime? (then the form may look messy during design time)Should I place them in a panel/group box and then replace the panels? (could be problem since I have some controls that should be displayed on both situations)
I have been trying to add an SQLDataAdapter control onto a webform in Visual Basic 2008 professional and Express editions. This control and others remain greyed out even when selected; they can only be seen when 'Show All' is selected in the toolbox. Is it that these controls are not available in the type of form?
I've checked various forums but have not seen a clear answer. I've tried some of the solutions proposed but none has worked. I've also reinstalled the application; then uninstalled, rebooted, reinstalled, but to no avail.
I'm trying to change the look of some controls in VB.An example would be a button, I now have a stack of 4 images on top of eachother. By using the mouseover events and such, I get the same result as a normal button. However, I'd like to be able to insert those images into a normal button like thing.
I know it's possible to do this by creating a custom control, but that'd end up with the exact same code, just in a different file.
However, the real issue would be a dropdown box and slidebar. I'd like to get them to look nice with my theme. (Background, buttons, borders. Things like that..). I got absolutely no clue on how I should do that.
I know that there's a tool to create controls, but that's from scratch and I can't get a grip on it, at all.
