.net - Databinding A Property With A Parameter?

Apr 23, 2010

I 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.

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Databinding An Object Property And Modifying Another Property In Code?

Jan 15, 2010

on 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].....

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C# - WPF Databinding To A Property In The Same Control?

Nov 23, 2010

In 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]...

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Databinding On A Property Of A UserControl In DetailsView

Mar 31, 2011

I 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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Databinding Visibility Property Of A Textbox?

Nov 27, 2010

I 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

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WPF Databinding ListView To A Property Of An Object Which Can Be Nothing?

Dec 7, 2011

I'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?

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Asp.net - DataBinding: 'System.String' Does Not Contain A Property With The Name 'dbMake'?

Jan 25, 2010

I 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"

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Databinding A Custom Property On An Inherited Control?

Apr 26, 2012

I 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]...

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Forms :: Databinding Visibility Property Of A Textbox?

Dec 5, 2009

I 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?

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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]....

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.net - Getting Base Field Type When Databinding To A Decimal (or Object) Property?

May 28, 2012

I'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.

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.net - CLR FormatException Thrown When Databinding An Int32 Field To A Nullable Decimal Property?

May 28, 2012

I 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.)

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Simple Databinding - Handle Bound Field/property Change - Winforms / .Net?

Oct 19, 2009

I 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.

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.net - Workaround - ByRef Parameter Of A Property

Mar 19, 2009

I have a legacy COM-component with an interface declaring a property like this (IDL notation):

[Code]...

This interface is implemented in a calling application written in VB6 like this:

[Code]...

Everyting works fine until I try to do the same in VB.Net. VB.Net refuses to compile code where a parameter of a property is passed ByRef. MSDN says VB.Net doesn't allow such parameters. Is there any way I could implement such a property in VB.Net?

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Method Parameter Name Same As Class Property?

Apr 21, 2010

Is it accepted to have a method parameter named the same as a property? At least it gives no error, even if in the same letter-case.. How does the compiler distinguish? does it always prioritize the local parameter?

[Code]...

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Data Bind To A Property That Contains Parameter In Silverlight?

Apr 14, 2010

In silverlight, can you bind to a property that contains parameter? For example, the following doesnt seem to work. Am I missing something or is this not possible?

C#
private System.Collections.Generic.Dictionary<string, string> ValuesField = new System.Collections.Generic.Dictionary<string, string>();

[code].....

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Cannot Bind To The Property Or Column 'xyz' On The DataSource.Parameter Name: DataMember

Jun 4, 2011

I'm currently using a combo box to select one of many alternatives. From 5 alternatives only 1 works, when i click on any other it gives me the following error:"Cannot bind to the property or column 'xyz' on the DataSource.Parameter name: dataMember" Why is this error caused? What are the possible solutions to this error?

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Parameter Is Not Valid Error When Reading From An Image Property?

Apr 20, 2010

I am getting a "Parameter is not valid " error when reading a value from an Image property and I don't know why.

Writing to the property works just fine (MyControl.EditImage = PictureBox1.Image) .

Reading from the property causes an error (PictureBox1.Image = MyControl.EditImage )

The Property looks like:

Private mNewImage As Image
Public Property EditImage() As Image
Get

[Code]....

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Specified For Parameter 'index' Of 'public Readonly Default Property Cha?

Nov 29, 2011

Argument not specified for parameter 'index' of 'public readonly default property chars(index as integer)as char'. Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

[Code]...

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C# - Cannot Bind To The Property Or Column Site On The DataSource.{10}Parameter Name: DataMember

Sep 18, 2010

When I try to use the following line of code:

cboSite.DataBindings.Add("Text", _dtSite.Select("Site <> 'ALL'"), "Site")

I get the following exception:

EXCEPTION : Cannot bind to the property or column Site on the DataSource.{10}Parameter name: dataMember

details I am connecting to an Access database and using .net 3.5 and writing the code in VB. In this database I have a table named Sites with a column named Site and when I try to use the line of code above I get the exception noted. I was under the impression that I could explicitly name the column that I need to use in my control (combo box).

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Error : Cannot Bind To The Property Or Column 'xyz' On The DataSource.Parameter Name: DataMember

Feb 5, 2011

I'm currently using a combo box in vb.net to select one of many alternatives. From 5 alternatives only 1 works, when i click on any other it gives me the following error:"Cannot bind to the property or column 'xyz' on the DataSource.Parameter name: dataMember" Why is this error caused?

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Error: This Causes Two Bindings In The Collection To Bind To The Same Property - Parameter Name: Binding

Aug 15, 2010

error in binding

Dadapter = New SqlDataAdapter(dat, conn)
Me.Dadapter.Fill(Me.Table)
bs.DataSource = Me.Table
DgvTire.DataSource = bs
txtserial.DataBindings.Add("text", Table, "serialn")

error: This causes two bindings in the collection to bind to the same property. Parameter name: binding

what should i do with this error?

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.net - A Parameter Is Missing [ Parameter Ordinal = 1 ] Error In Pocket PC Application

Apr 21, 2011

Following code doesnt work and raise error "A parameter is missing. [ Parameter ordinal = 1 ]".What s wrong with it?I am developing pocket pc application in vs 2008 and sqlce 3.5 sp1.

[code]....

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Call The Stored Procedure Which Has One Input Parameter And One Output Parameter?

Mar 21, 2009

I'm Trying to Call the Stored Procedure which has one input Parameter and one output parameter . VB.net code is below

[Code].....

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VS 2008 Template Function That Can Receive Different Parameter And A Type Parameter

Mar 9, 2011

I want to have a "template" function that can receive different parameter and a type parameter, like:[code]But Vb told me that tupeList is not defined... is there a way I can do that?

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A Procedure With A Single Parameter But The Input Values For That Parameter Are More Than One?

Oct 26, 2011

Is it possible to make a procedure have a single parameter but the values for that parameter are more than one? I have this procedure:

Public Sub autoComplete(ByVal cboCombo As ComboBox)
With cboCombo
.AutoCompleteMode = AutoCompleteMode.Append[code]....

Now I was wondering if there is a way to use it like this:

autoComplete(myCombobox1, myCombobox2, myCombobox3)

Or can I use a procedure like this with 'With...End With'?

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AddressOf With Parameter - Method Which Requires A Parameter To Be Passed In

Mar 1, 2009

I have a method which requires a parameter to be passed in. I would like to use the Addhandler to call the method through a dynamically created button control's click event.

When I include () in the AddressOf, VS complains: 'AddressOf' operand must be the name of a method (without parentheses).

When I exclude the brackets, VS complains: Method '...' does not have a signature compatible with delegate...

My code:

CODE:

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ToolTips, Parameter Options, And Parameter Groups For New Code?

Dec 10, 2008

One of the things that I think is really cool about VB.NET is how built-in functions and subs have extra help text in their ToolTips like "Expression: String expression to search for replace string." as well as the usual "Replace(...parameters...) as string" text. So are the pop up boxes with things like "CompareMethod.Binary" or "CompareMethod.Text." And finally I like how some functions and subs have different sets of parameters for the same routine. For example, New FileStream() starts with either a path (string) parameter or handle parameter, but none of the 15 sets of parameters contain both path and handle parameters. Is there a way that I can set up the classes and functions I write to use these things or do they only work with built in classes and functions? If there is a way, what are the proper names for them so I can look them up in the VS/VB documentation? I would be happy enough if someone would give me an example of them, but it would be nicer if I could go through the documentation and find out if there are other cool things that are related or near by.

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.net - 'Property' Cannot Implement 'Property' Because There Is No Matching Property On Interface 'IName'?

Dec 9, 2011

I'm having some very weird issues with interfaces right now.

I have a very simple setup. In one of my class, I have a Property implementing a Property from an Interface.

In my class it's like:

Private _oForm As IForm
Public Property Form As IForm Implements IContainer.Form
Set(value As IForm)

[Code]...

I have like dozens of interfaces like this working throughout my project and I can't believe this simple one can't work!

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Argument Not Specified For Parameter '<parameter>' Of 'Public Sub New?

Apr 26, 2009

have an idea on what i am doing wrong here:

Compiler Error Message: BC30455: Argument not specified for parameter 'dteRDate' of 'Public Sub New(strOName As String, strOAdd As String, intOPhone As Integer, strVer As String, dteRDate As Date, dteWDate As Date, strONote As String, strOrName As

[code].....

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