How To Create A Composite Control
Feb 6, 2010
I'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.
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May 8, 2012
Create 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.
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May 8, 2012
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.
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Jan 11, 2012
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?
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Apr 6, 2011
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?
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Jul 17, 2009
This 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].....
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Jun 27, 2012
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?
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Jun 17, 2011
I 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]...
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Mar 10, 2009
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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Mar 30, 2010
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?
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Jan 31, 2012
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).
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Apr 25, 2012
i 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
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Jun 11, 2012
I'm developing a program with a team in Visual Basic 2010.
What i wanna do is to create a textbox (inherits from textbox) with additional one property called MDIStatusInformation which is used to display a tooltip text in a status bar at main MDI form.
When i use this tag <Browsable(True)> _, the control property not list anything there.
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Nov 9, 2010
I want to create customized control on DataGridView Control in Vb.Net. But I am facing too many problem. How to create dynamic rows and columns and columns like
DataGridView Combo Column (extended combobox)
DataGridView Memo Column
DataGridView DateTimePicker Column
[Code]....
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Jan 7, 2012
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.
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Jan 20, 2011
If I create a list for a TextBox:
[Code]....
I am able to only add controls that are of type TextBox. My question to you is, can I create a List to hold more than one control type or do I have to create a list for each control type?
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Jan 17, 2011
I want to place 24 check boxes on a form. I want to enable drag and drop for each and place the code to handle the drop on a customized check box, then create each check box from the custom check box. I understand how to create the custom check box, my dillemma is I would like to be able to drop the new control on the form using the form designer IDE.
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Jan 23, 2010
Working on getting a legacy app up and running again for work. I'm getting an error at run time that I can't create an activeX control. The suspect call is
oSQL = CreateObject("SQLDMO.SQLServer2")
I did a bit of googling and found that SQLDMO should be in a SQLDMO.dll. I've got that DLL referenced in my project but it is still failing.
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Mar 11, 2012
It was so simple in VB6 but I don't know how to approach it in VB2010. I've looked the internet but each site seems to have a different solution and masses of code for something that could be done in a few lines in VB6.Here is the code I want to use. How do I go about creating a control array of 100 picture boxes pic(1) up to pic(100)?
Code:
For y = 0 To 9
For x = 1 To 10
tempObject = (Mid(StrRow(y), x, 1))
[code]....
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Oct 23, 2009
Im thinking of making a really user friendly tcp drag and drop tcpclient/server like winsock.[code]...
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Jun 7, 2012
i am trying to create a dll containing a webbrowser control. What i want it to do is this: i have a form which calls a function from that dll. the dll naigates to a webpage, say "www.google.com". after it navigates, it reads a string from the page body and executes some actions with it. The problem is, when the form calls the function inside the dll, the webpage is not loaded inside the dll, so there is no string to read. If i run the code of the dll as a windows application, the form loads, it navigates to the web site and reads the string... how should i modify the code inside the dll so when a form calls the funtion inside it, it first loads the webpage, and after that execute the called function? a sample of the code is here, this is the code which i compile as a dll:
Imports SpeechLib
'Imports System.Speech
'Imports System.Speech.Recognition
[Code].....
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Aug 26, 2011
[code]...
I have a treeview and a tab control on my design page. Tree view has four parent roots: Animals,Flowers,Fruit Vegetables. It has also a number of child roots.When I double click on a child root at run time I want to creat a new tab page on tab control1 with the name of that double clicked child root and it must have have different number starting from one after the name. For example: jaguar1,jaguar2, apple1,apple2,apple3,... When clicked parent roots mustnt creat a tab page.Each tab page must have the name of the childroot clicked and a number starting from 1... How can write this code in visual basic
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Jul 5, 2009
I am trying to create a new user control. But facing some problems. Following are the steps I am taking.
[code]...
Then in another project [windows application project] in solution explorer > references > Add Reference it displayed add reference dialog box In projects dialog box it was supposed to show the above project but it didn't.So I clicked browse There a select component dialog box appeared. In ile of type it showed ( Component Files (*.dll;*.tlb;*.olb,*.ocx;*.exe) )I located folder where project was saved. But it does not show any files (there are some olders )
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Mar 11, 2009
i'm trying to create a user control.. i placed a textbox and a button in it.. there's also a form in it.. basically this is a DateTimeTextBox control that i'm doing.. i'm able to create the control and add it to my forms but when going to the property at design time, i don't see the Text property and its not on the DataBindings property as well. how do i make use of this property?
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Jun 9, 2011
Is it possible to create other instances of an existing control and put them into an array?
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Feb 18, 2009
I want to create A control Which should be a OCX or DLL and it should be able to run on both ASP Pages and Win forms.Which Template should i use.
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Jun 18, 2011
How to create four PictureBoxes array at design time e.g. pic(0), pic(1), pic(2), pic(3). In VB6 set the Index property of PictureBox but VB.NET hasn't this property.
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Mar 14, 2011
In VB6 there is a feature called Control Arrays, where you name controls the same name and provide them an index value. This allows you to set a value by looping through the controls and setting each value. In VB .NET I can't create a control array?
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Jul 4, 2011
How to create this control? What control is this that in the VS 2008? untitled.JPG
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Sep 28, 2007
I am new in .net framework 2.0. I have to create a custom control. How to create it?
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