DB/Reporting :: Binding A Button To An Object?
May 10, 2009
Is it possible to bind a button to an object? I have a situation where I create lots of buttons dynamically and add them to a form, each button corresponds to a record in a database table, I want the button to hold all the info in the record without the need to search for the data each time I press it. I've already have the info in the tag property as a delimited string, but the process of extracting the info from the string is not efficient. if I add one new value I have to add the code to extract that info using string manipulation. I would rather have an object that represents the record so I can access each value directly.
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May 29, 2010
I use objectbinding to display client data in a datagridview. The datagridview also contains a counry-column allowing the user to choose the country of the client.Unfortunately, databinding of comboboxcolumn does not seem to work if an own business class is used. Using a simple collection instead works well.Copy the sample code into a new windows project and the programm runs fine. Then comment and uncomment the two lines with "XXX" and the code will fail. Why and does anybody know how to make the sample code work by using the business object class(variable named "newClientListVariable" in the sample)? [code]
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Nov 26, 2009
I'm trying to bind data to a combo box but it does not appear to be working. I've setup the DataSet and the DataSetBindingSource and all this appears to be working, within the form design I can expand the little arrow in the ComboBox control and preview the data. This appears to be working but when the application is run, nothing appears in the drop down box.
I have the following code in place:
Code:
cmbSelectCompany.DataSource = ContactsDBDataSet.Company()
cmbSelectCompany.DisplayMember = "CompanyName"
cmbSelectCompany.ValueMember = "CompanyName"
[Code]....
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Jan 19, 2010
In a manufacturing environment I'm using an Access database to store properties of manufactured parts. I've queried a table to fill a datatable, which then populates the attached form.
[Code]...
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Oct 6, 2008
At work we have this really old excel spreadsheet with movable points in it.This feature no longer works in '07 so I have decided to try and make a VB form to replicate it's functionality.I have the concept down of what I'm gonna do, I'm using sliders for the movable points and I'm using a data grid view for all of the numbers they are just going to type in, and then I have a button that saves all of the data to the database that it links with.I've figured out how to get everything working except the button that saves the data. So there are 4 separate databases attached to sliders and another one that is part of the data grid view. What am I going to have to put into that button under the click event in order to make it save the values in all of these databases?
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Jul 28, 2010
I am using OLE DB provider to connect to database from my VB 2008 Express edition. This code suppose to filter datagrid as I type letter by letter at the Textbox.
HTML Code:
Imports System.Data.OleDb
Dim ds As DataSet
' Firstly binding all records to DataGridView
[code]....
The problem is that I get this message : Object reference not set to an instance of an object. I don't understand why, because I was using the same code before just for different database and it was ok.
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Apr 22, 2009
I have this piece of code that works very well and gives me the path the user's start menu:[code]This obviously uses late binding. Now say I want to do this in C#, or in VB.NET strict mode, neither of which support this kind of syntax with late binding.
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Aug 24, 2010
I have a class:
[Code]...
Now I can change the TextBoxes or the object: MyObject.Two = 3 ..the object and TextBoxes are updated in two ways. Now I want to update the whole object: MyObject = New TestClass(3, 4) ...but this doesn't update the TextBoxes.
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Feb 23, 2009
I am able to get a sql statement to an object. However when attempt to do the same type of code for the stored procedure it does not work.
Public Function ListDMR() As DMRList
Me.Connection()
Dim objALLDMRlist As New DMRList
[code]....
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Jan 18, 2009
Is is possible to bind two BindingList<> object to the DataGridView? Both the bindinglist objects are of the same type. I tried binding an array of BindingLit<> object to the grid, but this fails.
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Apr 30, 2012
I have created a user control in wpf which consists of a textbox and a listview. Now, I want to bind a class object to the list view from the form where I will use this control. So, basically I want to dynamically set the binding for the listview.
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Aug 12, 2011
I have a problem about button click event and data binding.I have described my problem in the mark as following
Public Class Window1
Private Sub Window_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded
Dim list_of_name As New List(Of String)
list_of_name.Add("John")
[code].....
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Jan 10, 2010
am using VS 2005 and VB. However, if I am not using binding navigator, how can I manage the state of an object it is "added" ( or even "deleted") the property setter is only setting the state to "modified". where should i set it to "added" if i were to insert a new object to a database
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Jan 4, 2010
I've read (or the only book that covers ado 3.5) is Murach ADO 3.5 and throughout the book, the author recommends using object binding so that's what I've been doing. However, I had a chance to look at all the codes for our applications at work, and only datatables are used.Was curious as to the difference/pros and cons between binding to an object, and binding to a table. I guess my real question is which one should I be using, datatable or object binding? Is there a definite answer or does it depends on the situation and what I want to do?
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Aug 14, 2011
For adding some images to a WrapPanel, I'm trying to iterate through a collection. My TileCollection contains instances of a Tile class which has a ImageSource property. I've got it by doing all the stuff step by step - Create a new image 1, assign all the properties, create a bew binding 1, assign binding 1 to image 1, add image 1 to the panel, proceed with image 2, ... tons of code I want to shorten now. Here is what I've got so far:
For Each tile As Tile In TileCollection
MainPanel.Children.Add(New Image With {.Width = 80, .Height = 80, .Margin = New Thickness(10), .SetBinding = New Binding With {.Source = tile, Path = New PropertyPath("ImageSource"), .Mode = BindingMode.Default, .UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged)}})
Next
1) ."SetBinding" doesn't work in object initializer expression. Is there any workaround?
2) Is there any way to add a handler in object initializer expression, for e.g. capturing mousedown events?
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Jan 31, 2010
I'm new to programming and am trying to learn how to developed data driven application and was wondering which method is recommended? I know there are some debates out there but most of the books I have recommend using object binding, but it doesn't offer any concrete information on how to implement it. I went to MSDN and most, if not all, the documentations are on dataset. So I guess my questions is, object vs dataset, which do you use?
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Mar 17, 2011
it's about object binding, yes it's just a simple binding. but i don't know why it won't work.for summary, i will write about what i am doing:
1. i have one solution, and have two project in it. WaitressDataWin and WaitressDataObject
2. inside WaitressDataWin, i have 'waitressdata.vb' . this is my simple form , there are some basic textbox (waitress name, address, phone)
3. inside WaitressDataObject, i have 'waitressDataObj.vb' is where i put my object class, i have WaitressName property, WaitressAddress, and Phone.one of my property is like this, others are same except the name of course.
Private _WaitressName As String
''' <summary>
''' Gets or sets the Waitress Name[code]....
4. i create data source , that is object data source. i add reference so i can add my second project which is WaitressDataObject and set the WaitressDataObj as the data source.now i have datasource with three properties (WaitressName, WaitressAddress, Phone)
5. I bind my textbox, by dragging the WaitressName (in datasource) to my waitressname textbox .. so on to all my properties.., i also get bindingsourcecomponent, WaitressDataObjectBindingSource
6. then I put this code to my form load :
dim wdm = new WaitressDataObj
Me.WaitressDataObjectBindingSource.DataSource = wdm
7. done, it should've been worked, but it didn't , i don't know why.. , every time i fill one of my textbox, the properties didn't set the value, i put breakpoint in the 'set' part of all my properties but it never breaks anyway.. (the 'get' part is good, it read my property value when i load the form). so i just had problem in my 'SET' Part.
8. I think i had checked on my variable (word, case sensitive,etc), no problem.
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Aug 9, 2009
Using VB 2005. I am attempting Object Binding, with a validation class that handles the validation at the object properties. But, it is working fine for strings only. For any numbers and dates fields on the form, if I simply enter and leave the text box without entering any data, the validation doesn't kick in. It does only when the text box is dirty (an empty string ?), if I enter something and erase it (backspace), the errorprovider is not letting go unless I fill in something that conforms to the data type of the text box and says the input is not in the correct format / type. And at this point, the object property is yet to be assigned any value, and hence my validation class is yet to activate and do its job.
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May 2, 2011
I am having a repeater within it there is label bounded with the Parking_Name Field and a button which is bouned to the Parking_ID field.
<asp:Repeater ID="repeater1" runat="server" DataSourceID="SqlDataSource1" OnItemDataBound="repeater1_ItemDataBound"> <ItemTemplate> <li> <asp:Label ID="lblName" runat="server" "><%#Eval("Parking_Name")%> </asp:Label></div> <asp:Button ID="Button1" runat="server" Text="Button" CommandArgument = '<%#Eval("Parking_ID")%>' />
How can bound the button with the Parking_Name as well ?
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Oct 27, 2011
I'm having trouble with some Silverlight functionality. My goal is to get some data from the database and display it in my grid. Sounds simple, however, there are 7 columns that are always going to be there.
The rest of the columns depends on the account. There could be 2 (called Actions) associated with a certain account, compared to another account that could have 5, and the action names can be completely different.
I have successfully been able to return a list of all the possible actions for the given account, and then adding the columns to the grid in the code bihind(VB), and I can bind my data to the grid for all the columns that are already known. The way I store the item's actions, is a Property of type List. My problem is finding a way to iterate through the actions list of the Item object in order to bind those actions to the grid.
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Sep 22, 2011
Custom Object Master-Detail Data Binding
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Jan 11, 2010
VB 2008 .NET 3.5. I have a custom "Shipment" object that contains a list of "ShippingRate" objects. This list of "ShippingRates" is accessible through a property "Shipment.PossibleShippingRates." That property simply returns a copy of the list of "ShippingRate" for that particular Shipment.
My UI layer receives a list of "Shipment" objects from the BLL. This list is databound to a datagridview, and shows details relevant to the Shipment such as Shipping Address, etc.
I want to bind the "Shipment.PossibleShippingRates" property to a combobox, such that when the user changes the grid row, the combobox reflects the "PossibleShippingRates" for that "Shipment."
In addition, I need a way to store the "ShippingRate" they selected from the combobox for later use.
I have tried a few ideas, but none of them work properly.
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Oct 15, 2010
With the DataGridView I'm used to just populate them with a list of some object, using the DataSource property. Now I want to just display properties from a single object, and I'm a bit confused on how to do it.. The object is updated through an API event, and I want to select some of the properties for displaying in the DataGridView, to look like this:.where "ValueX" is the name of the properties.Now, what would be my options for binding this to the DataGridView, such that property changes are automatically updated. Since an update also must invoke the control, does that mean I must reassign all bindings, or what logic is necessary in this case?
should I bind to an array, arrayList, stringList, dataTable etc? I guess I'm not sure which type of source will allow binding. Or if I should perhaps build the columns and cells of the grid and populate them "one-by-one" to the properties of the object?
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May 10, 2011
I am using VS 2008, VB, and an Access db. I cannot get the save button on the binding navigator to work. I dragged the table from the datasource onto the Windows form creating all of the controls, including the binding navigator. I can add records but I cannot update. The code below is what I have (the commented code is what I have already tried):
[Code]....
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Apr 30, 2011
I have a repeater which has a hidden field of Parking_ID <asp:HiddenField Value='<%# Eval("Parking_ID") %>' ID="HiddenField1" runat="server" /> and a Button under it.
I tried binding the value to the button from the html, it is giving me an error which indicates binding did not work. The programming language for the form is C# How can I bind the value of Parking_ID with its button in order to pass that value to another form? and how it can be passed to the other form?
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Mar 23, 2006
I am a vb beginner and I was wondering how you bind a radio button to a field in a database that has choice of 2 values. For example the field in my db is CoverType and the user should be able to select Hardcover or Paperback.Don't seem to be able to do get radio buttons to represent this on my form.
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Jun 10, 2011
I am wondering which code would apply to a refresh button in a datagridview form.
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Apr 3, 2010
I was wondering if there was possible to make a progressbar show how the progress of an button? How should this be done if possible?
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Oct 27, 2010
I need to bind a textblock.text property to a single element in an observable collection, or array element, and have the text update using the INotifyPropertyChanged or INotifyCollectionChanged, whichever is best.
Most examples describe ways to bind listboxes or other list views to entire collections, but my application needs to update several textblocks on a screen depending on notification of a change in one or more elements of an array.
textblock1.Text = MyArray(0)...
textblock2.Text = MyArray(1)...
textblock3.Text = MyArray(2)...
textblock4.Text = MyArray(3)...
Is it possible to bind a single textblock to a single array element? Is it possible to get notification of the proper type that will update one or more of the textblocks if any assigned element changes?
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Feb 17, 2010
Im doing my first project with WinForms, and Im trying to get the DataBinding working. Theres no database in my project, but I'd like to bind some of the TextBoxes to objects' properties. In the other section of this forum (here) I found this line of C# code which does it: textBox2.DataBindings.Add(new Binding("Text", this.myPerson, "LastName"));
my question is can data binding to object properties be set up during design time (without writing code)? If so, how? P.S. I know how I would set up this binding if in WPF, but I'm forced to use WinForms.
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