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?
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
View 3 Replieson 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].....
how to control the visibility of movieclip property from vb.net
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I have set the Visibility property of the main window to Hidden and added the following in Window_Loaded:
private void Window_Loaded(object sender, RoutedEventArgs e){
this.Visibility = System.Windows.Visibility.Visible;
}
But it doesn't show up the Window.
On my .aspx page i want to be able to show and hide certain panels depending on user selections (radiobuttonlists).
For example in my aspx page i have;
<form id="form1" runat="server">
<asp:RadioButtonList ID="RadioButtonList1" runat="server" AutoPostBack="True">
<asp:ListItem>1</asp:ListItem>
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Currently my program randomly removes words from a set of text and inserts textboxes below the text. The user can then enter his/her answers in the new textboxes. What I would like to do is set the program so the user can have two choices one being Easy and other being Advanced. Then when the user hits either button it brings up everything that is currently on the form. I'd prefer to do this without having to use MDI forms. I've had a hard time using the MDI forms and therefore would like to avoid using them. They way I was thinking this could work is all objects would remain invisible except for the 2 buttons and then when you hit one of them they disappear and everything else appears.
View 1 RepliesI have a panel with 5 labels and 5 listviews in it. By default they are hidden. At runtime I want only the ones shown that are needed. For example, if there are enough players for three tables then three tables should show up. I know how to make the controls visible, but not sure how to control how many are actually displayed. I also think I may have to do seperate loops and seperate the control types?
Private Sub Set_Tables()
Dim tables As Long
tables = Math.Ceiling(NumPlayers / NumPerTable)
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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.
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]...
Is there any predefined property by which I can set the DisplayFormat/DisplayStyle of a textbox? Suppose I want a textbox to hold the actual value 888888888888.88 and show it formatted as 888,888,888,888.88. In short it should hold 'Double' data type value and show it with thousand separators and decimal places upto two digits. If text is cleared from the textbox, it should have 0 as value and 0.00 as displayed value.
View 2 RepliesI am trying to add a little functionality to my textboxes by making a label show when the values of the textbox are greater than a certain amount. The method is working, but only works on certain values (between >8 and 10) and I can't figure out why it won't work on values greater than 10.
Private Sub Submit1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Submit1.Click
Dim sum As Double
Try
If hrs1.Text <> "" Then
[Code] .....
I've also set the visibility of the labels to false in the onload event of the form.
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]
View 1 RepliesI'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?
In the following XAML the editPanel is always visible. The overlayGrid is only visibile when a long operation has been kicked off by pressing the F5 key. The visual effect being that the editPanel is grayed out will the long process takes place.
<Window.InputBindings>
<KeyBinding Key="F5" Command="{Binding Path=RefreshCommand}"/>
</Window.InputBindings>
[code].....
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"
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.
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Ok basically what I am doing is using panels to create virtual "pages" within my application, and using buttons to switch from page to page. However whenever I click the button to move from page1 to page2, page 1 disappears and page2 does not become visible.
Private Sub page1_next_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles page1_next.Click
page2.Visible = True
page1.Visible = False
ToolStripStatusLabel1.Text = status_page2
End Sub
Also, how do I make it so that when the user focuses on a text box a tool tip pops up?
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 =
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I populate a hash table with the name of a control as the key and the control itself as the value using the following code that loops through my code on start-up:
Private Sub Populate_Hash_Table()
For Each ctrl As Control In Me.Controls
For Each member As Control In ctrl.Controls
[Code]....
This method works effectively, but the only problem is I seem to get a preformance hit as it takes a second to set the current control to false and the new one's visibility to true. What way should I modify my code so that it works more efficiently?
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.
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.)
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.
Let's say we have a controltab with two tab. The first tab contains textboxs where entry values are entered On the second tab are textboxs that display the results. I have noticed that if I fill up the entry values and create the binding between each textbox and their property and then I destroy it (without clearing the textboxs), the textboxs of the second tab will not display any result. I have this exemple here BindingAddition.rar
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I have a simple UI form with some controls (textboxes, checkboxes, datagridviews etc.)
The form communicates with an object that contains the values that should be displayed in the controls.
My project currently holds one dataset and several forms. In each form I have dropped an instance of that dataset and certain editors are bound to tables of that dataset instance. Now this means that when each form is loaded I also have to load the relevant data into the dataset instance of that form (basically i am loading the same data more than once).
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I have a Windows Forms which contains a whole bunch of different text items on TextBoxes, Labels, and ComboBoxes. I then catalog what is written in these Textboxes and selected in these ComboBoxes in XML files so that they can be reopened later. Because what goes into the Textboxes and ComboBoxes are physical quantities, they have units (for examples "Inches," or "Lbs," etc.) which are the text of the Labels themselves. Multiple quantities share similar units, so I don't allow the user to change each one individually, but instead change a unit globally (for example, all weights in "Kilogram" instead of "Lb").
The units themselves are Public Properties of a separate class which I named "MyDBClass". The properties raise events when they are Set, so that objects data-bound to them change as well.When I initialize the main Windows form, I instantiate a class of type "MyDBClass," set all the unit defaults ("LengthShort = mm," etc.), and create a databinding for the Labels to the "MyDBClass" properties (e.g. ctrl.DataBindings.Add("Text", MyDBClass, "LengthS") ). From then on, the only way the user can change the units is to use my MenuStrip and select "New" (which erases all text and sets the MyDBClass properties back to default), use the MenuStrip and select "Open" (which opens an XML file, reads the "Unit" elements in, and uses them to set the MYDBClass properties), or use the MenuStrip and select "Change Units" (which brings up a dialog with a handful of ComboBoxes containing possible units, and then sets the properties of the MyDBClass based on what the user selected in the dialog).
Having said ALL of that, I can finally get to the problem- one of my units ("SpringRate") does not change when the user selects "New" or "Change Units" from the MenuStrip. It will only change when the user opens an XML file. This makes no sense, as the act of opening an XML file calls the exact same code as selecting "New" from the MenuStrip (which is that is sets the properties of the MyDBClass). The label is also identical to its surrounding labels and the ComboBox which selects the unit is identical to its surrounding ComboBoxes (I tend to use Copy/Paste when working in Design mode). I even put Try->Catch blocks around the Property's Set code and the code inside the other Subs which calls it.
I have a form with lots of textbox, and a dateTimePicker. All of these controls are binded to a JoinTableDataBindingSource. So when I wanted to insert a new value or update the values, I have to rebind all these controls to the respective tableBindingSource.So after saving all the values to database, I rebind them again to the JoinTableBindingSource to display the values accordingly.
All these works perfectly until I tried to bind the DateTimePicker. I am able to show the Date, insert new values to Date, and updating date.However, after all the binding and rebinding,whenever I tried to call tblJoinTruckTableAdapter.Fill (me.dataset. tblJoinTruck), All the textbox.Text becomes "Nothing". I am unable to show the values in the textbox.
Everything works when I commented off the binding and rebinding of dateTimePicker. I seriously have no idea what had happen.Below is the binding and rebinding of my dateTimePicker.'I have clear the databinding before adding this to point it back to its respective table.
dtpTareDate.DataBindings.Add(
New Binding("Value", TblTruckBindingSource, "dtTareDateTime"))
'After inserting or updating the values, I clear the binding and rebind it back to tblJoinTable.
dtpTareDate.DataBindings.Add(New Binding("Value", TblJoinTruckBindingSource, "dtTareDateTime"))[code].....
What wrong with my databinding? How to correct the perfect binding with combobox and texbox.. When I select Projectname the other are changing except the email... Why the email is not changing?
Code:
commemails = New OleDbCommand
daemails = New OleDbDataAdapter
dsemails = New DataSet
dtemails = New DataTable
myconn = New OleDbConnection(("Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=") + My.Application.Info.DirectoryPath & "SMRPsource.mdb")
[Code] .....
I have the following code i got from another thread and modified it to be able to navigate through records. The first record of the table is loaded into the textbox, but will not navigate. Tested already with a combox and worked, so i'm sure there is data in the bindingsource.
Me.BindingSource1.DataSource = MyData
Me.BindingSource1.DataMember = "ParentTable"
Me.BindingNavigator1.BindingSource = Me.BindingSource1
[Code]....