Is it posible to add Data Bindings to a variable so that the app. is able to count the caracters in in a field.Some thing like this below.I know this code dont work, I need something similar? [code]
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How can I get Var to bind to a data column?
Only for testing purpos I am using Label1 in the code sample below.
Label1.DataBindings.Clear()
Label1.DataBindings.Add("text", HoofGeregteBindingSource, ("Inhoud")
Dim MyVar As String = Label1.Text
[Code]....
I have a project in WPF 4 and VB.net 2010. I want to bind the volume property of a mediaelement to a variable in another module. Mind you, the variable is in the correct data type, so no conversion is necessary
View 1 RepliesOK So I know WHY I am having the error I am getting. I don't know HOW to fix it. Basically, if the user doesn't have a certain permission, I need to join another table. But .NET is so picky I can't just make two different queries in an IF statement and then use it outside of the if statement. I can think of some ugly work arounds for this, but I would rather not. I am fairly new to .NET I know just enough to be dangerous.
[Code]...
because of this: Dim l As IEnumerable(Of Company) its not just IEnumerable of a Company, its got the source in it. I have to explicitly select source to use it in my datagrid. Can I make Dim l something that will make it stop complaining?
I'm trying to create a collection of variable binding in a class.It is intended to look something like this:
Dim x as integer, s as string
Dim c as new VBindClass
x = 1
s = "Hello"
[code]....
Is there some function that allow us to retrieve a unique ID for a given variable and also get/set based on variable?
Update:At last, I've managed to found the answer. Here's the code:
Dim gh As Runtime.InteropServices.GCHandle = Runtime.InteropServices.GCHandle.Alloc(obj)
Return Runtime.InteropServices.GCHandle.ToIntPtr(gh).ToInt64
I have a MainPage - mainpage.xaml Inside the MainPage I have a frame that hosts other pages. The first page that is auto loaded is the LogIn - LogIn.xaml
The user enters their email to login (no password required, just email to identify, its an internal app so passwords are not required or even wanted by users).
On MainPage.xaml the header should have a "Hello " TexBlock (name: ui_txbUserName). The LogIn page has a method which on submit gets the UserID (for other reasons and saves it) and the User Name.
I want to change the ui_txbUserName when the person logs in and update if he/she logs out of one account into another. I have looked at INotifyPropertyChanged and Dependency Properties and im just not sure how to go about doing this!
I have a MainPage - mainpage.xamlInside the MainPage I have a frame that hosts other pages. The first page that is auto loaded is the LogIn - LogIn.xamlThe user enters their email to login (no password required, just email to identify, its an internal app so passwords are not required or even wanted by users).On MainPage.xaml the header should have a "Hello " TexBlock (name: ui_txbUserName). The LogIn page has a method which on submit gets the UserID (for other reasons and saves it) and the User Name.I want to change the ui_txbUserName when the person logs in and update if he/she logs out of UsingOfficerID - its a global variable set when a person logs in, its used all over the place in the application.
View 2 RepliesI am binding a textbox's text value setting to my a variable in my configuration file. I only consider the input from this textbox to be valid if it's an integer number bigger than 1. Right now what I was doing is letting the user write whatever he wanted in the box, and I'd only let him save the settings after calling a validation function. The problem seems to be that my binding variable in the Settings class seems to be being updated as soon as the textbox is being edited, and that's a behaviour i'd like to skip. How can I do this?
View 3 RepliesI have a problem involving late binding, and I absolutely cannot for the life of me figure out how to fix it. I have spent hours researching the problem to no avail, so I am turning to stackoverflow as a last resort.The problem is pretty much this: I am creating a grocery list application. I have a class named Item which stores the name, price, quantity, and description of an item on the grocery list. I have a module named ListCollection which defines a Collection of Item objects. I have created an Edit form which will automatically display the currently selected ListCollection item properties, but whenever I attempt to fill the text boxes, it tells me that Option Strict disallows late binding. I COULD take the easy route and disable Option Strict, but I'd prefer to figure out what the problem is so I know for future reference.I shall paste pertinent code here. (Late binding error is in EditItem.vb)
[code]...
I have tried declaring a String variable and assigning the Item property to that, and I have also tried grabbing the value directly from the List item (not using the Get function), and neither of these made a difference.
I have three table and I want to put the three table's data in one variable and from that variable i will produce the datatable and then want to write the data in CSV file.I am Following this step..
Void
GetDetails()
DataClasses1DataContext
[code].....
how to use the VS 2010 IDE tools in a way the Microsofties didn't specifically intend. But since this is something I immediately tried without success.
I have defined a .NET 4.0 WPF Application project with a simple class that looks like this:
Public Class Class1
Public Property One As String = "OneString"
Public Property Two As String = "TwoString"
[Code]....
The expected result was that "OneString" would appear next to "One" and "TwoString" next to "Two" in the running window.
The question is: Why didn't this work? What will work instead? If I put bindings in a DataTemplate, it works. Blend, with its sample data stuff, implied that this should work, but it doesn't.
i hve create combobox & text box and add database source to my project...i know how to binding data or load data to combobox using SELECT query..but can i change SELECT to INSERT query cz i wont when i type data into textbox,data will be in database...second..can i binding without add database to project..i mean mydatabase in debug folder..i hve problem binding data if database is not in myproject..
View 7 RepliesData binding should be an extremely simple thing to manage but I can't find a SIMPLE solution to the following problem.
I have two forms
Form1 contains a 4x4 MSFlexGrid (unfortunately an unmanaged COM object but I can merge cells, which I can't do with a managed Datagrid)
Form2 contains other controls which change the data in the Flexgrid.
I connect the two with a Public 4x4 array. Form2 changes the data in this array. I can update the grid data by reading the array. But how do I bind the Grid to the array so that it auto-updates - which is the whole point of binding isn't it?
I have a listbox in my form that gets its values from a data table by data binding. My question is, when the data (row) is loaded it also selects the first line automatically. I do not want this because I want the listbox to select an item only when the user clicks on it. Otherwise, the iteme should ony be listed. Is there a way to manage this?
View 2 Repliesi want to binding excel data to a datagrid without no header, just the data.for example :my excel files consist of 3x3 matriks data in 3x3 excel cell like this
1 2 3
4 5 6
7 8 9
and i want to show all this data on data grid i have tried with some code like this
Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
Dim ds As New DataSet
MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0; " & _
[code]....
but the first row of that data ( 1 2 3 ) is not shown up in the datagrid, just the 2nd and the 3rd row that shown up in datagrid?
I have a bit of code that reaches out and grabs a series of rows from SQL Server DB. I perform an inner join to get some related table data. In the process I get returned the user id of the creator of the data. I then want to pass this into a query to get back a full name. I am having no luck figuring out how to do just that. If I use the data visualizer I can see the name I am after, I cannot figure out the call to extract it
Bindingsource1.DataSource = GetData("Select * From PURCHASE_ORDERS WHERE PURCHASE_ORDER_NUMBER =" & REQ_NUM.Text)
.DataSource = Bindingsource1
[code].....
I'm looking for a line or two of code that will bind a DataSet.Datatable column to a textbox on a Datarepeater?
View 2 RepliesI have produced an Access database and a dataset linked to the database, and am working on a form in VB to enter data to this database. This form was produced by dragging the required fields from the data sources manager to automatically bind to the dataset.
I am attempting to use some radio buttons to allow users to select their gender on a form. I do not know how to take the results of selecting either radio button and upload the user's selection to the dataset, which would then be uploaded to the database.I also attempted to use a ListBox and ComboBox for some other fields, but they do not seem to work as they should, since when I attempted to press the handily provided "Save" button, I was provided with an error to the effect that the boxes appeared to be empty.
i make this code to bind combobox and i insert the item to the combobox
With Me.CmbBxEmployeeName
.DataSource = GetAllEmployeeNameBindingSource
.DisplayMember = "Name"[code]....
but this error show ,Items collection cannot be modified when the DataSource property is set.
I have developed a form for Windows VB.Net that uses a number of text boxes that are indidivually bound to separate columns in a database. When one of the textboxes (let's call it XYZ.Text) is bound to the database, it prevents the data from any of the other bound text boxes to enter the database. When the binding for this one text box (XYZ.Text) is removed, then all the other text boxes work fine.
View 1 RepliesI'm trying to bind data to a combo box but it does not appear to be working. I've setup the DataSet and the DataSetBindingSource and all this appears to be working, within the form design I can expand the little arrow in the ComboBox control and preview the data. This appears to be working but when the application is run, nothing appears in the drop down box.
View 5 RepliesI have a DataGridView that is bound to a BindingSource. Below this are a group of textboxes that are associated with each column in the DGV. I tried to bind the textboxes to the BindingSource but realized their was no DataSource property for the textboxes. How can I bind them?
View 11 RepliesI have a bit of code which loads data from a stored procedure in MS SQL Server and then loads the data to a datagridview, which works fine. What i want is for the code that connects / loads the data to sit in my Database Class and then everything associated with the datagridview to be stored in my Form but i am having problems passing the contents of the bindingsource over to the Form from the Database Class.
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I just started working on a small team of .NET programmers about a month ago and recently got in a discussion with our team lead regarding why we don't use databinding at all in our code. Every time we work with a data grid, we iterate through a data table and populate the grid row by row; the code usually looks something like this:
[Code]...
Our team lead was saying that he got burned using data binding when working with Sheridan Grid controls, VB6, and ADO recordsets back in the nineties. He's not sure what the exact problem was, but he remembers that binding didn't work as expected and caused him some major problems. Since then, they haven't trusted data binding and load the data for all their controls by hand.
The reason the conversation even came up was because I found data binding to be very simple and really liked separating the data presentation (in this case, the data grid) from the in-memory data source (in this case, the data table). "Loading" the data row by row into the grid seemed to break this distinction. I also observed that with the advent of XAML in WPF and Silverlight, data-binding seems like a must-have in order to be able to cleanly wire up a designer's XAML code with your data.
I am having quite an issue with data bindings in .NET.Some background information, my business object tier is using CSLA v1.0.And _clientObj is passed in as a parameter as a business object that inherits CSLA.BusinessBase Here is the code segment:
Dim nextClient As New ComboBox With { _
.Name = "txtClientAtt" & (ClientBoxes.Count + 1).ToString(), _
.DisplayMember = "FullNameAndID", .ValueMember = "ClientID", _
.Tag = _clientObj}
[code]....
That debug statement does indeed get reached if _clientObj is a pre-existing object with an assigned ID value. How is that possible? I was assuming that adding the data binding should immediately set the .SelectedValue property of the ComboBox if the DataSource object has an initial value.
Dim Member As Integer
Member = Val(MemberID.Text)
'create connecetion
[code].....
im doing something wrong in this statement
objDataAdapter.Fill(mydataset,
"Bookingen")
Dim dbbooking
[code].....
I have a form called studentForm which has a studentCombobox, studentTextbox and a studentDatagridView In the constructor of the studentForm I need to bind studentCombobox to the StudentbindingSource of the main form and to bind studentDataGridView to appropriate binding source in the mainForm So that this datagrid view displays all the bookings for the studentID currently selected in studentComboBox
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How can I store the value of a variable into another variable that wont be changed unless it meets certain criteria
View 1 Repliesis there any way that i could link/bind multiple binding source to only one binding source navigator?
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