Bind Combobox To Datatable And Object Property Causing Duplicate Bindings
Aug 19, 2011
I'm trying to populate the list of a combobox by binding it to a datatable. Also, I want the selected value of the combobox to be bound to an object property so that when the selected value changes, it's automatically updating the object. However it's causing an error at runtime: "This causes two bindings in the collection to bind to the same property.
Parameter name: binding" I thought binding the dropdown list to a datatable and the selected value to an object were different properties but obviously I'm not getting it right.
Code:
Private Sub PopulateSiteSelect()
With Me.PlanSiteSelect
If _Plan.PlanID <> Nothing And _User.UserID <> Nothing And _Plan.Category <> Nothing Then
I've got a ComboBox with an ItemsSource which I've bound to a List(Of String).What I'd like to do is have the XAML update a String property when the SelectedValue of the ComboBox changes. I've seen a whole bunch of examples for TextBoxes which use
Text="{Binding Path=MyString}"sort of stuff, but I don't really think that'll be the way to go if, in future, I need to change the ItemsSource to a List(Of ObscureObject)...
What I want to achieve is to Bind just some of the properties of a Control to a DataTable object.Let's say I have a Label on the Form : "MyLabel1".MyLabel is a Class that inherits from Label and adds a property "ID", an Integer, to the base class.
I want to Bind .Left and .Top properties of MyLabel1 to a DataRow in my DataTable, and I want to see them updating, everytime I change MyLabel1 location on Form. I put description and full code, so everyone can test it in minutes :
I have :
--> A Form, with a DataGridView "DGV" : The DGV is for showing at real time the desired properties of the controls I want to bind ( in this case, just one control : MyLabel1 ).
--> MyLabel Class : Public Class MyLabel Inherits Label Private m_id As Integer
I would like to know if its possible to bind the property LOCATION of an object like button.[code]So that, every time I move either the hscrollbar1 or vscrollbar1 the button1.location will change or moves the object to the location of hscrollbar1.value and vscrollbar1.value. It should happen without setting its value using the SCROLL EVENT.
will fail with more than one instance of the WebBrowser control.what actually happen is that mycontrol object become Mycontrol and compiled vb.net application will fail with error
Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND)) at Microsoft.VisualBasic.CompilerServices.LateBinding.LateGet(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack)[code].....
Same code will work with vb6 app with multiple WebBrowser controls
Edit: This code is comipled with: Option Strict Off
Basically what happens is each time it loops through it adds a number to the end of the string, and by the end I should end up with an array full of string in a format like "111 222 333 444 555 666" but I end up getting strings like this "111 111 222 222 333 333". The weird thing is, if I add a message box in every loop it works fine, but obviously I don't want a message box pooping up every time it loops through. What is causing this and how might I fix it
The code is: For x As Integer = 0 To (NumCards.Value - 1) NumRep = 0
I have a custom class and my dependency properties won't work with bindings unless I declare the class as a static resource. My xaml: <sdk:Frame prism:RegionManager.RegionName="MainContentRegion"> <sdk:Frame.ContentLoader> <myLibrary:RegionNavigationContentLoader RegionManager="{Binding RegionManager}" RegionName="MainContentRegion" /> [Code] .....
I am having difficulty getting some form control property bindings to work correctly. Below is the code I am using-
[Code]...
The ZedGraphControl is just a GraphPane, and the TolSelectBtn is just a button. Problem is, the ZedGraph control binding works properly, but the binding to the button does not (both controls' Visible properties are set to False in the design window). Can a ToolStripMenuItem only handle one data binding? Or is there something else I should be looking for?
I am working on a project that uses lots of custom class objects.Before starting work on real project, I tested the object behaviour on a temporary project. And find that if i add the object to a list and combobox and then make any change to the object property then it reflects in list and combobox.But after using the same process in real project the change does not reflect. how can i update object property placed in the combobox.for eg.Class X has property id and name created objX of type Class X and set id=1 and name='All' insert objX to combobox now, in the same form and in other function when i get objX from combobox and change name='None', then it does not reflect in combobox.
I am working on a project that uses lots of custom class objects.Before starting work on real project, I tested the object behaviour on a temporary project. And find that if i add the object to a list and combobox and then make any change to the object property then it reflects in list and combobox.But after using the same process in real project the change does not reflect. Why?Also, how can i update object property placed in the combobox.
for eg. Class X has property id and name created objX of type Class X and set id=1 and name='All'
I have an MDI form on which I have placed a ToolStripContainer. I have set the BackColor of the toolstripcontainer.contentpanel to an ApplicationsSettings property binding for BackColor. At design time the background colour of the contentpanel reflects the colour in the saved Applications Settings. However at run-time the background colour of the content panel is not the colour that has been saved in the applications settings (in this case DarkSeaGreen). It continues to display the colour from the current
I have a table in my database with 5 columns (ID1 to ID5) and just one row. I'm trying to bind a comboBox, to show ID1 through ID5 in the combobox when my form loads. I have a dataset and tableAdapter's made for this already. I just want to know how to bind a combobox to those ID values.
I have a datatable and I apply a filter to the defaultview.rowfilter property of that datatable. If I then loop through the rows collection of the datatable, will I only be able to see those rows that the filter applies to, or will it loop through all the rows?
I have a datagridview bound to a datatable setting its datasource property to the datatable. I would like to have a child form that contains a list of columns associated with the datatable that contains a checkbox that will allow the user to hide and show the columns ( I do not know the best control to use here) (I assume this is the easy part as All i need to do is loop through each of the datatable's columns to get the column name)
now I would like save these visible columns on some event like form_closing so that the next time the user opens the form up it will remember the settings
I have a data table (cv_dtPools) that contains six columns.I only want to load two columns from cv_dtPools into CheckedListBox.I want vchQCID to be the DisplayMember and "intQCPool_PK' to be the ValueMember. When the user is done selected the items in the CheckedListBox they will then click a button.The code behind the button will then collect the ValueMembers (intQCPool_PK) and put them in another data table which will be used by another procedure.How can I get only the two columns of the data table into the CheckedListBox? [code]
I try to bind a textbox to a datatable but i cant.. I checked if the datatable is filled (it includes the results of a sql query)and it s ok.. i can depict the result in a combo box but not in textbox. I wait for only one result that s why i need textbox instead of combo.. that s my code..
I would like to use a DateTime Picker control to allow my users to select amongst dates and hours specified in a dataTable. I think I will have to use two DateTimePickers one for the date and one for the hour. The hours shown will depend on the date selected. How can I bind the DataeTimePickers to the dataTable?
Having problems with a datatable which consists of multiple datalogger information. Within the datetime field there are as the name suggests listed date and times entry i.e. 12/01/11 22:56:56 ect ect.
Problem is i am graphing this and when ms chart reads the duplicate entries as a series. It doesnt like it and comes up with a slightly odd interpretation. I need to get the duplicate entries out to establish a single time series.
I was proposing to clone the original datatable and run a loop to remove the duplicates. I have been trying to do this for days and have played with a whole load of examples, without success. Can anyone point me in the right direction on this.
