Databinding On A Property Of A UserControl In DetailsView
Mar 31, 2011I have developped a usercontrol, but I can't seem to find how to databind on a property of the usercontrol in a detailsview.[code]
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ASP.NET Databinding On Page Or In Each UserControl?
Jan 17, 2012Is it better to perform data access operations on the page and then populate the properties of each usercontrol with the retrieved data. Is it better if each UC calls the business layer and pulls its own data independently without having to depend on the page.Existing Conditions:
1. Any information (Querystring, URL, etc) that the page would use for data access is also available to the individual UC's
2. Both solutions utilize caching.
My coworker insists that the first option is better since Data access only happens once on the page. The second option seems more logical to me since it will allow me to place the UC on another page without the need for any additional wiring on the page itself. The page and the UC are truly decoupled.
Custom UserControl With DataBinding, Not Returning Value
Jun 27, 2011I have a custom control with a TextBox, Label and a ComboBox. All I want is to be able to select a binding source(for the TextBox from the properties window when i use the control on a form. I have managed to get the controls Textbox to allow this using[code]...
View 1 RepliesDatabinding An Object Property And Modifying Another Property In Code?
Jan 15, 2010on a Windows Form, an object myObject is bound to myObjectDataBindingSource like this:myObjectDataBindingSource .DatSource = myObject on the form, i have a check box bound to the property: chkProp1 for example of the object: myObjectDataBindingSource In the code when the checkbox is clicked, I need to go in code and change another text property of the object txtProper2 for example like this:
Private Sub chkProp1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkProp1.CheckedChanged
[code].....
Usercontrol's Property - Property That Has A PictureBox Datatype
Feb 9, 2011I have made a usercontrol, it has a property that has a PictureBox datatype. When the usercontrol is dropped on a Form from the toolbox, I want the picturebox property (in the property window) to be showing all the picture boxes (names) that are on the form as a dropdown so I cant select them. How do I do that?
View 6 Replies.net - Databinding A Property With A Parameter?
Apr 23, 2010I would like to databind to a property that requires arguments.
I thought about defining custom columns and cells because the parameters that the property requires are available from the within the object bound to the row, but I'm having trouble materialising this idea.
As an additional problem, that I think leads on from this, I have also created a custom column and cell for the datagridview that takes the implementation of an interface during it's construction. I have added this column to the datagrid view programmatically (passing the Interface implementation to the column constructor). I've overridden the paint method which evaluates a property from the Interface implantation using arguments from the other rows in the column, but it doesn't seem to call the paint method at all. Even on DataGridView.Refresh(). Essentially I would like this column to also update, evaluate a property from the interface implentation using arguments from the underlying object bound to the row and print this number in the cell.
The reason for this second problem is so that I can implement the interface many different times and just at a column dynamically to display it's evaluation.
C# - WPF Databinding To A Property In The Same Control?
Nov 23, 2010In this example the IsEnabled property of my button is bound to the selected rows "Local" property of the grid and it works just fine:
<Button DockPanel.Dock="Bottom" Width="100" Height="100" IsEnabled="{Binding ElementName=dataGridRestore , Path=SelectedItem.Local}"></Button>
<my:DataGrid x:Name="dataGridRestore"
ItemsSource="{Binding}"
[Code]...
Databinding Visibility Property Of A Textbox?
Nov 27, 2010I seem to be having a problem binding the visibility property of a textbox to a database value using the advanced binding property.I found this article (BUG: Inconsistent behavior when you bind the Visible property of a Windows Form control to a Boolean field) stating there is a bug in some ol
View 3 RepliesWPF Databinding ListView To A Property Of An Object Which Can Be Nothing?
Dec 7, 2011I'm trying to create a Window with a ListView and an Area where details to the selected Object are displayed. The Listview displays items stored in an ObservableCollection(Of T) Collection. The items itself contain also an ObservableCollecton(Of T) Collection which should then be displayed in the details area in another ListView, accordingly to the selected item of the first ListView.
The Problem: The InitializeComponent() throws an Exception (XAMLParseException).
Exception:Set property 'System.Windows.Controls.GridViewColumn.DisplayMemberBinding' threw an exception.
InnerException:Object of type 'System.String' cannot be converted to type 'System.Windows.Data.BindingBase'.
The Line- and ColumNumer of the Exception are Pointing at the <GridView> of my ListView (.View).This is the First ListView
<ListView ItemsSource="{Binding Path=MyObjectCollection, Mode=OneWay}" SelectedItem="{Binding Path=Selected, Mode=OneWayToSource}">
<ListView.View>[code]....
So. How can I bind to the Collection Property of an Object could be nothing?
Asp.net - DataBinding: 'System.String' Does Not Contain A Property With The Name 'dbMake'?
Jan 25, 2010I am a newbie at ASP.net and after using sqldatasource with a listview to insert and show results from an SQL server db I want to try using the LINQ datasource since it seems to be more flexible in codebehind.
My problem is this: I droped a listview control to the page and I created the Linq datasource in codebehind with vb. the issue that I am having when I ..Select d.columms name i get the error system.string does not contain a property with the name "columname".. if i ommit the column name then its works fine.. the funny part is the d.count works fine but after that i get the error.. please see my code below:
[Code]...
b.dbMake needs to work so that i can use Distinct ,, ia m using asp.net version:3.5 and IIS version 7.0 ..
not sure what i am missing ,, but i did try alot of approaches,,1- checked the web.config file and it seems to have two assemblies and two namespaces for LINQ..2- used different databinding syntaxs,,and i searched a lot for the solution.. the last one i read the person ommited the name of the column,, i thought that wasnt the best solution.. also my dbMake column is comming up in the "intellisence"
Databinding A Custom Property On An Inherited Control?
Apr 26, 2012I am creating an Extended DateTime picker. I have created a Class the inherits the Default DateTimePicker and Adds a new Property NullableValue. I have placed the control on a form and bound it to a Binding Source using the NullableValue Property. When I load the record the control updates as it should. But when I change the value and save it does not save back to the database.
[Code]...
Forms :: Databinding Visibility Property Of A Textbox?
Dec 5, 2009I seem to be having a problem binding the visibility property of a textbox to a database value using the advanced binding property.
I found this article (BUG: Inconsistent behavior when you bind the Visible property of a Windows Form control to a Boolean field) stating there is a bug in some older versions of the .net framework.
Does anyone know if this has been fixed in 4.0?
Populate Text Property And Items Of Combobox Not Using Databinding?
May 12, 2010 I'm rewriting a VB6 application in VB.Net. So far I have 2 forms, frmLocations (frm1) and frmLocationInfo (frm2). frmLocations has a combobox, cboLocations, from which a selection is made and an "Ok" button is clicked, which then loads frmLocationInfo. frmLocationInfo has a series of textboxes to display info corresponding to the location that was selected - Location, Location Number, Phone, Fax, Email. There are also 3 comboboxes on frmLocationInfo - cboDepot, cboFreight, and cboDispatcher. I need their text property along with items to be populated, also with data corresponding to the initial selection made on frmLocations. I'll spare you all the difficulties I'm having w/the other comboboxes, and instead focus on cboDepot. I have gotten it to populate its text property to display the corresponding Depot, however, the items are not populating and all you see now when you click on the dropdown arrow is only the depot that shows up in the text property.
Here is the code for this portion.
frmLocationInfo
Private Sub FillDepotCombo()
Dim sql As String = "Select distinct depot.depot_name, depot.depot_refnbr, locations.site from depot inner join locations on depot.depot_refnbr =
[Code]....
.net - Getting Base Field Type When Databinding To A Decimal (or Object) Property?
May 28, 2012I've got a custom NumericEditor control that has a nullable Decimal property called Value. When I bind a data field to Value, I'd like to retrieve the underlying Type of the data that's bound, so that I can restrict the use of decimal places if the source field is an integral data type.I figure I'd have to do this in the BindingContextChanged event, but how do I get the Type of the data field from the binding itself? My Google-Fu is failing me at the moment.
In short, I'm looking for something like the GetValueType method mentioned in the following question: Simple databinding - How to handle bound field/property change. Winforms, .Net I imagine this method would also be handy if the Value property was an Object.
.net - CLR FormatException Thrown When Databinding An Int32 Field To A Nullable Decimal Property?
May 28, 2012I have written a .Net 4.0 Winforms Numeric Editor control (which inherits from TextBox), and I have added a Value property that is a nullable decimal type, as follows:
Public Class NumericEditor
Inherits TextBox
Private _value As Decimal? = Nothing
[code]....
how to get around this exception, particularly when I'm databinding a number field to a number property, and there should be no string conversion happening. (To further complicate things, I'm using a similar technique for another control where I databind a DateTime field to a nullable DateTime property, and that control works just fine.)
Simple Databinding - Handle Bound Field/property Change - Winforms / .Net?
Oct 19, 2009I have a custom control with a bindable property:-
Private _Value As Object
<Bindable(True), ... > _
Public Property Value() As Object
Get
[code]....
Also, here, I'm adding a handler to the DataBindings.CollectionChanged event.This is the second place that I retrieve the type:-
Private Sub DataBindings_CollectionChanged(ByVal sender As Object, ByVal e As System.ComponentModel.CollectionChangeEventArgs)
If e.Action = CollectionChangeAction.Add Then
Dim b As Binding = DirectCast(e.Element, Binding)
[code]....
I need the first place, because the BindingContextChanged event is not fired until some time after InitializeComponent.The second place is needed if the binding field is programatically changed.Am I handling the correct events here, or is there a cleaner way to do it?
Note: My GetValueType method uses the CurrencyManager.GetItemProperties....etc, to retrieve the type.
ASP.NET Usercontrol Property Value Does Not Run Markup
Apr 27, 2011Well i have a usercontrol with a property "ClientScript" and in the aspx file where i use the usercontrol i set the value to [code]the problem here is that the is litterly passed to the property and not parsed first and replaced by the ClientID..I had the same clientscript applied to a buttons OnClientClick and there it worked...Must i apply some sort of attribute to the property to get this working? [code] i know that im saving to a local variable and that it will be cleared on reload and so on but thats not the problem here.
View 1 RepliesText Property In A UserControl In C#?
May 21, 2010I have a control with a inner TextBox. I want to make a direct relationship between the Text property of the UserControl and the Text property of the TextBox. The first thing I realized is that Text was not being displayed in the Properties of the UserControl. Then I added the Browsable(true) attribute.
[Browsable(true)]
public override string Text
{
[code].....
Usercontrol Property Editor?
Dec 27, 2009I have created a usercontrol in VB2008 that draws a rectangle and has the ability to apply Border3DStyles to the control.The problem I have is being able to select which sides to apply the border on during design time.If you look at the BorderSides property of the ToolStripStatusLabel you will see how it lets you select the sides to apply the border to.
View 5 RepliesUserControl Property Value Limit?
Jan 9, 2010I am making an UserControl which has several properties. One of them should have a specific range of the value - it should only be possible to set the value of the property with a number from 1 to 255. 0 should not be possible, because some calculations are done in which is divided by this property's value. I thought I could use a Byte as type, but a Byte can contain 0 as well. I would like to be able to set a limit for the value of this property, and that an error is shown in the Designer when, in this case, 0 is entered. I mean an error window like you get when filling in 0 for the interval of a Timer. Is this possible with an UserControl as well?
View 2 RepliesAccessing UserControl Property From Array
May 14, 2010I/we (my class) created a usercontrol that included a picturebox and a timer. We declared the public variable to access the timer enabled property. Placing the user control onto a Form we are able to enable the timer. However, when we went to declare an array for the control we could not access the properties... We successfully declared control arrays using base class control...
View 11 RepliesVS 2008 Adding A Property To A UserControl?
Oct 6, 2009I am trying to add an ArrayList property to a UserControl with the following
Private _hist As ArrayList
Public Property History() As ArrayList
Get
Return _hist
End Get
[Code]...
I get an 'Object reference not set to an instance of an object' error.
Why To Add WordWrap Property To Inherited UserControl
Jan 23, 2012In the book I am reading the writer shows code for adding the WordWrap property to a class which inherits System.Windows.Forms.UserControl. But what is the point? There is nowhere to insert strings! Also he shows how to add an event by embedding a Combo in an instance of the class and using its SelectedIndexChanged event to raise the event for the UserControl; again what is the point?
View 5 RepliesAdding Multiple Images To Property Of UserControl
Oct 10, 2009I have an imagelist control in a usercontrol I made. I would like to create a property for this usercontrol, to select multiple images (in an 'openfiledialog'), and adding them to the imagelist inside the usercontrol. So, what's the type of this property?
Public Property thelistofimages as [?]
It should be an array of images I guess. And then in the 'set' of the property it would add all the images to the imagelist.
Defauld The Usercontrol Create(when Is Used) The Backgroundimage Property?
Dec 5, 2011defauld the usercontrol create(when is used) the backgroundimage property, but these property can be blocked? i'm asking these, because i need the entire control in that property
View 11 RepliesDefault Property For DotNet Interop Usercontrol?
Mar 11, 2009I need to set the default property of a dotNet Control used by an VB6 Application.
<ComClass(myControl.ClassId, myControl.InterfaceId, myControl.EventsId)> _
<DefaultProperty("NewProperty")> _
Public Class myControl
[code]....
Programmatically Setting Property Values In A Usercontrol?
Nov 12, 2009I am programatically creating instance of usercontrol as shown below
[code]...
I have two public properties in my usercontorl like clerkName and RespName. How can I set those values in the above code. Intellisense is not showing ClerkName and respName Properties.
How To Change TextBox Text Property On A UserControl From The Other Loaded One
Nov 30, 2011I have two UserControls already loaded how to change TextBox text property on a UserControl from the other loaded one.
View 1 RepliesUsercontrol With Designer Browsable Property Not Saving Value At Run Time?
Aug 17, 2011I have been making a control and have added a property for a list(of CustomClass). The custom class contains a string, an image and a list of another custom class which contains a string and an image. I have added this property to the designer by adding the browsable attributes and all appears to work correctly with this.
My problem comes when running the program. I can set all of the values within the property and I can go back to them and they are saved, however, as soon as I run the program, the values are wiped out as the property is set to Nothing.In order to allow my property to be edited and saved, I realize that I must initialize the list and have done so in the accessor method of the property (if the property's value is nothing).
I have modified the values in the designer and placed a breakpoint on all of the items which use the property and it's underlying field, as well as on the property's methods itself. The first breakpoint hit is of it being accessed and the value is always nothing.
I'm not sure where the values are supposed to be stored as I have checked the designer code where it would normally store types such as strings and I have checked the resources to see if they have been saved there (like an image would be). After running the code, the values in the designer are wiped out also.
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VS 2008 USERCONTROL With Property DataSource - DisplayMember - ValueMember Type ComboBox
Oct 27, 2009How can I create the property... type the combobox? for now I found alone this that it goes in mistake
[Code]....