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all groups > dotnet windows forms databinding > february 2007

The infamous datetimepickers again
Posted by Earl at 2/28/2007 11:17:35 AM
I'd rather rant about these godforsaken dtpickers, but it would do no good .... Have a bindingsource set up using a typed dataset as datasource and the applicable datatable as member. Bind the bindingsource to a datagridview and then the same bindingsource to a handful of controls including...more >>

after VS2005 uninstall, VB6 bound controls not displaying
Posted by lb at 2/27/2007 2:52:19 PM
A VB6 app that was developed years ago and was working fine this morning, no longer works since uninstall of both Visual Studio 2005 and Visual Studio 2003. Form controls that are data bound do not display values. Values that are entered into data bound controls do not get written to the Acc...more >>

Strange concurrency error
Posted by John at 2/25/2007 8:44:38 PM
Hi I have a perfectly working vs 2003 winform data app. All the data access code has been generated using the data adapter wizard and then pasted into the app. I had to add a new field in the backend access db which I did. I then dragged the table to the dataset and deleted the old table...more >>

Binding to nullable control properties
Posted by despot at 2/23/2007 4:15:00 PM
Hi, We are trying to extend the DateTimePicker control by shadowing the Value property so it uses DateTime? (nullable) data type, to support null values. It works fine when the value is set from code, but we have problems with data binding: myDateTimePicker1.DataBindings.Add("Value", _ta...more >>

Stored Proc call -- timeout, how to change default
Posted by Freddy at 2/23/2007 6:47:50 AM
Hi, Calling a stored proc from C#, and it times out because it takes longer to execute than whatever is the default. How can i change the default? i've changed the Connection Timeout, but that didn't do it--it's not the connection that's timing out. in SSMS, there is an execution timeou...more >>

Error: BindingSource cannot be its own data source
Posted by Beemer Biker at 2/22/2007 11:08:21 AM
I have a program that runs for 3-4 hours, cycleing thru a datagridview, reading various database settings and then useing them in a calculation to perform various tasks. Occasionally I get the following error message: =========start of error message======= System.InvalidOperationException...more >>

Multi User Environment Winforms
Posted by AnikSol at 2/21/2007 10:02:00 PM
Development Environment: VB 2005 Prof, SQL Server 2005 In a typical Multi User environment, what is the best way to handle updates of disconnected datasets of other users. Eg: User A opens application Winform 1, dataset1 is loaded on his machine User B opens application Winform 1, dataset1 ...more >>

Data-bound DataGridView, overloaded ProcessCmdKey & CancelEdit problem
Posted by Pavel Maly at 2/21/2007 9:05:17 PM
Hello, I need some help with a DataGridView control and ProcessCmdKey method of the form. The DGV is data-bound to an Access database table with a few NOT NULL columns. The ProcessCmdKey method of the form is overloaded. I tried to use return base.ProcessCmdKey(ref msg, keyData); in the...more >>



Dataset and scalability issue
Posted by Nick nkw at 2/21/2007 10:50:04 AM
I am creating a winforms application. Drag and drop and VS 2005 automatically created Dataset based on the MDB schema. I found it seems that all the changes are cached in the memory. Will the default way has any scalability issue if the database tables are huge? What's the solution if it doe...more >>

datagrid update upon dataset deserialize from xml
Posted by R&D at 2/20/2007 2:20:01 PM
Hello, I have bound datagrid to dataset tables. when I save the dataset as a serialized xml file and deserialize it after app restart, the grids are empty. That's how I serialize: Forms::SaveFileDialog * sfd = __gc new Forms::SaveFileDialog ; Forms::DialogResult dr = sfd->ShowDialog() ; i...more >>

strange behaviour with a checkbox and databinding (easy to replicate)
Posted by Kevin at 2/20/2007 10:03:22 AM
Right I have a very strange problem in vb .NET 2.0 with a checkbox and databinding which is very easy to replicate: Create a windows application project. on Form1 add a checkbox and a button. Add the following code to the form: Private boolChecked As Boolean Private Sub Form1_Load(...more >>

Property Grid Binding
Posted by moflaherty at 2/19/2007 12:12:10 PM
Is there a way to dynamically bind to a Property Grid? I have metadata in a database; I would like to write a stored procedure that returns the dynamic list of properties. But I want to add attributes, etc. Since I don't know what properties and property types may come out of the results, I am...more >>

Disable a text box when it's not adding new row?
Posted by Nick nkw at 2/16/2007 5:10:57 PM
I want to enable a text box only when it's in "add new" status. The BindingSource.Position just return a number. Any good way to do it? Thanks,...more >>

How to save an entity based binding source using a tableAdapter.Update
Posted by alee at 2/16/2007 12:24:11 PM
I created an object using BindingList<T> for GetObjects() and assigned that to a objectBindingSource in a WinForm application. The ObjectBindingSource then assigned to a DataGridView. There was a objectBindingNavigation also on the form. Everything worked as expected when I run the applicati...more >>

Databinding to a Property of a Collection
Posted by AndrewDucker at 2/16/2007 7:42:52 AM
I have a class which is both an IEnumerable _and_ has various properties to itself. I want to bind a textbox to one of those properties, but can't seem to find a way to do so. To give a simple example: class NameList : Hashtable { private string overallName = "Andy"; public string ...more >>

Problem with Parameter
Posted by SF at 2/16/2007 12:00:00 AM
Hi, I am new to ASP.NET. I started my first testing ASP.NET by having a ASP page consist of a drop-down control and 1 datagrid bound to Access database. The dropdown control works very well except the datgrid becuase I want to limit the datgrid to display only information selected in the dr...more >>

Possible help for Newbie
Posted by Not Bright at 2/13/2007 3:37:25 PM
Hi All, Hope everyone is well and wouldn`t mind helping a very frustrated newbie out? Im fairly new to VB 2005. I have made a fair very simple Database Projects which have all worked. Im now writing a very simple project which has a Table, and 3 Combo Box`s which are set as Lookups to other...more >>

Can I Filter a datagrid bound to a List<>
Posted by koulbassa at 2/11/2007 10:54:00 PM
I have a list of custom objects that I am displaying by means of a datagrid. Is it possible to filter what rows I bring into the datagrid? I can't use a dataview (as far as I can tell) because I'm not pulling from a datatable. I'm using a tablestyle to format my columns... Is there a w...more >>

binding a arraylist of custom objects to any control .net 1.1
Posted by R&D at 2/10/2007 7:18:28 PM
[concerns .NET 1.1] hello, I am searching for a control (listview / datagrid / treeview?) to display a few lists of custom objects (frames, connections) - each list should contain several properties in one row concerning items and subitems (frame name and characteristics, e.g. number of field...more >>

Displaying a status image in a datagridview
Posted by Simon Harvey at 2/10/2007 2:55:05 PM
Hi all, Can someone show me, or direct me to some code which deals with the following (pretty standard) requirement: I have a database column with an integer indicating status e.g 1 = Available, 2 = Out of Stock and so forth. In the datagrid, I would like to be able to display an approp...more >>

Password encryption and binding
Posted by Earl at 2/10/2007 2:03:15 AM
I'm adding password encryption to the Employees form. I have a strongly-typed dataset being used as the datasource for the EmployeesBindingSource, and the Employees table set as the datamember. All controls on the form are bound to the EmployeesBindingSource. Except for the password ... I...more >>

Last edited control not taking changes (no lose focus)
Posted by Jose Fernandez at 2/7/2007 2:06:47 PM
Hello. We have a Form with multiple controls (textboxes, Comboboxes, etc). I have these controls binding to an user Binding Data Source. PROBLEM. The last control edited is not getting updated UNLESS we click somewhere else (that forces the control to lose focus). If we click on the sa...more >>

DataSet.Clear
Posted by jaro at 2/7/2007 1:01:15 PM
Hi I've simple scenario. I've win form with text edit bound to my dataset object. this dataset has one table with one column (datasource for my edit). Everything works fine, but when I clear my Dataset anf fille it again (from web service) my text edit lose binding (doesn't display valid value...more >>

Datagrid binding and XML file
Posted by Ces at 2/7/2007 12:19:12 AM
Hi All, Recently I needed to use a pure XML data file to create a simpe user interface: A master detail form with a datagrid, the datagrid contains a DataGridViewComboBoxColumn. The form contains also a BindingNavigator. Simple. I managed to do the "complex binding" between the BindingNavig...more >>

DataBinding to Relation throws exception - VS2500 / Ado.net 2.0
Posted by Rolf Welskes at 2/5/2007 5:36:01 PM
Hello, I have two tables in sqlServer Table01, Table02. ID in Table01 is primary key. In Table02 I have a field ForeignId I have a relation from Table01 to Table02 with Table01.ID to Table02.ForeignId. So I have a 1 to infinit releation from Table01 to Table02. This relation be named Fk_T...more >>


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