DataBinding Cannot Find A Row In The List That Is Suitable For All Bindings
Aug 6, 2008
I have a GridView and some textboxes, etc whose BindingSource is a list of business objects.
Problem comes when my business objects are updated programmatically. My objects implement INotifyPropertyChanged, and I raise the PropertyChanged event when the object is updated. When the object changed happens to be the selected row in the GridView.
I get the following exception: System.InvalidOperationException
DataBinding cannot find a row in the list that is suitable for all bindings.
How can I solve this?
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May 17, 2012
I have a dropdown list control which when a particular item is selected, another dropdown's list is populated based on that selection. The code behind is below.
Imports System.IO
Partial Class Data
Inherits System.Web.UI.Page
[code].....
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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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Aug 3, 2011
What is the suitable type for these 3 syntax in vb.net? i can't find in this page url..I've tried to convert the first one to -->byval ID() as byte is not working
1. unsigned char *ID
2. unsigned short*Count,
3.unsigned long*Minute
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Jun 16, 2011
what version of devexpress is more subtable for vb.net 2008?
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May 14, 2012
I need to implement caching in Asp.net web application My need to store data with different ID's. So which method is better ?
Use a dictionary variable. Insert the data (key as ID and data as value).
Dim mDict As New Dictionary(Of String, String)
mDict .Add(bID, uwtTree.WriteXmlString(True, True))
Cache.Insert("mTree", mDict)
[Code]....
Which method is the best way ? Or is there any other method exists ? I am using .Net 3.5 /IIS 7 (VB.Net).
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Dec 6, 2010
I have created the user control which has two predefined components namely:
1.TextBox(which is used for searching name of items)
2.DatagridView(used for displaying name of item which are similar to text enetred in TextBox)
When we drop this usercontrol on any form then the code which written during creation of user control must be automatically created behind the form and which must be modificial...
I have used VB.NET 2008 and SQL server 2005.
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Mar 24, 2010
I use VB in Visual Studio 2008 Pro. I've created a few solutions using the Crystal Reports tools. I found them easy to work with & easy to do things, (export to different formats, refresh reports, write an automated service that ran & saved reports, etc...)Is CR in VB 2010? If so - which version of VS 2010 do you need to buy to get it?OR - is the reporting services in VS a suitable replacement? Is there a viewer / preview like the CR tools? Can you create a standalone app to refresh reports & export them to different formats? Which version of VS 2010 would I need to purchase to get these?At home - I use Win 7 media centre (a fantastic piece of software). Are there any development 'goodies' in Visual Basic 2010 for Win 7 Media Centre?
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May 19, 2009
Code as follows:
[Code]...
it's telling me that I cannot show the DateTimePicker1 value in the label because the types are different. How do I tell the label to convert the date format for display? I've tried .string() but it didn't like that.
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Dec 21, 2011
I want when I create a node in a tree View object could enable a button and when remove all of the nodes disable my button again.How can I do this and which event is suitable for this work.
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Oct 26, 2008
I am trying to find a suitable way to convert any word from any language to I2OF5 Barcode.In most basic terms, what I am thinking is constructing a numerical representation of a word by making use of ASCW function and I am planning to do that by a single pass through the variable that holds the word. Maybe I will use the first two digits for language ID and maybe the last two digits for storing the string length information in order to reduce the possibility of collisions that may appear.
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Feb 15, 2011
I have a list of sites that I need to update their bindings from the current IP address listed to another one, how can I possibly do that using VB.NET? I will have to do this often and I don't want to manually update that every time.
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Dec 11, 2010
I'll try to make this simple, using VB.Net on Windows Vista:How do you change key bindings programatically?I'm thinking it has to do with the registry so if it does just give me the registry key names(i know how to change the registry already)If it helps, the reason I want to do this is to change the Windows media center button so that it opens my program rather than WMC.
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Apr 17, 2011
I am developing a iimage veiwer.
1. i need to resize the form to a suitable size depending upon the heght and width of my image
2. their are two buttons one should always be at the bottom right corner and other always at the top right corner.
3. How do i make the picture fade in.
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Sep 3, 2009
After reading all the examples for list of T exists and Find and find first, none show how to handle multi-property objects. Below is bare bones example maybe someone could flesh out to show how this should be done.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim DatePriceList As New List(Of DateAndPrice)
DatePriceList.Add(New DateAndPrice(Date.Parse("1/1/2000"), 10.12))
DatePriceList.Add(New DateAndPrice(Date.Parse("1/2/2000"), 11.12))
[Code]...
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Jul 23, 2010
I'm trying to set up an installer to register a web site. Currently, I've got it creating an Application Pool and Web Site under Windows Server 2003. Unfortunately, whenever I try to modify the ServerBindings property to set the IP Address, it throws an exception at me. I first tried this because the documentation here told me to [URL]. I'm currently using VB.NET, but C# answers are okay too as I need to switch it over to using C# anyway.
[Code]...
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Oct 28, 2009
Difference between Early and Late Bindings.
Example of Late Binding:
If
sender IsNot Nothing AndAlso TypeOf sender Is Values Then
receiveobj = CType(sender, System.Object)
a1 = CType(receiveobj.a1, Int32)
End If
How do I change this into the prefered Early Binding?
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Nov 21, 2010
Can I use VB.Net's generics to simply Wpf notifiable bound controls?
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Jan 26, 2009
I want to update the date and time from two separate pickers to my table.My 2 DTPers are bound to a dataset.One is in the Short Format, the other is Time.I have several other bound controls, and I just do a .Update to update my table. I tried just updating the row:
Me.DsTradeShow1.Tables("Tradeshow_Details").Rows(0).Item("Show_Date") = CDate(Me.DateTimePicker15.Text & " " & Me.DateTimePicker16.Text)
but it throws an exception when I do my save.
[code].....
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Aug 25, 2011
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] .....
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Feb 26, 2009
This is the form I'm having problems with. As you can see I've created a tab interface which is working. There are five text boxes on it which are binded to the Staff table in the database. When the tab is changed, the binding is changed to a new field. However, unfortunately, when a new record is selected, the data bindings do not update, and instead, the first record is always being used. We suspect the problem may be coming from the fact that there is code to unbind from the text box and rebind it again. This is the code I'm talking about...
Private Sub TabCheck()
If TabState = 1 Then
pnlTabs.BackgroundImage = My.Resources.tabs1
txtBox1.Visible = True
txtBox2.Visible = True
[Code] .....
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Oct 12, 2009
here you are one of the problem I had in my past few yeas spent in automating office processes with vba.If you develop an application and you don't know which office version is installed on the pc on which your application will be installed you can have problem with references.
[Code]...
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Oct 28, 2010
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?
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Feb 24, 2009
I have a project that I used the 'Connect to Database' tool to set all the bindings and table adapters, etc. Currently the database is housed in the same directory as the exe. I was asked if I could have the database location be a dynamic value. My question is when you set up a project to work with a database using the 'Connect to Database' tool, how can you change its location?
I found this setting:
ASRDBConnectionString
But its read only.
Within that setting is text that says: DataDirectory
So thought that might be a variable to change somewhere....but can't find it.
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Feb 9, 2010
I have a form with a datagridview, 2 datetimepicker(dtp) controls, combobox, textbox, 3 buttons and a bindingsource. All my controls are bound to the datasource and seem to work fine when the form loads. One of my datetimepicker controls losses the bindings when I add a new row to the datagridview and save the changes. I validate the date entered in this dtp.
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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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Sep 8, 2011
I'm binding a ComboBox's SelectedIndex to a Nullable database field like so:
VB.NET
ColapsoComboBox.DataBindings.Add("SelectedIndex", EnsaiosBindingSource, "Colapso", False, DataSourceUpdateMode.OnValidation, 0)
As you can see, I've defined the NullValue to be zero, yet I get an InvalidCastException. Is there anything I'm doing wrong? Or is handling the binding's Format and Parse events the only way around this?
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Jul 30, 2011
I have a list of specific class.In this list , a position class is included.And that position class includes X and Y coordinates.I have Current Coordinates and the coordinates in list .I want to calculate the distance for each item in List and find which item has minimal distance.Here is my code :
For Each item As ITEMX In xHandle.ItemList
Dim CurrX As Integer = txt_TrainX.Text
Dim CurrY As Integer = txt_TrainY.Text[code]....
so distance is the distance between my coordinates and the item.I calculate it for each item in list but how do i find the minimal one ?
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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
[Code]....
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Oct 13, 2011
i m getting a collection of data in list's object. And from this list i want to get the maximum id.`
Dim objinfo As List(Of AlbumInfo) = objPhotos.GetPhotos_Alb_ID(Me.ModuleId, hdd_AlbID.Value)
Dim Photo_Image As String = ""
Dim str As String = Photo_Image & fu_Photo.PostedFile.FileName.Substrng(fu_Photo.PostedFile.FileName.LastIndexOf("."))
[code]....
this returns the "0"th positions id from Convert.ToString(objinfo.Item("0").Photo_Id + 1)but i want to get the last item's id.
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