Databinding works only one way da.Fill(data, "SubClass") SubClassDescription.DataBindings.Clear() SubClassDescription.DataBindings.Add("text", data.Tables(0) , "SubClassDescription") Putting the edits back into the data source doesn't work! Dim manager As BindingManagerBase manager = Me.Bi...more >>

Hi to all, I have problem with detecting null values in datagrid cell here is the example code i get i get runtime error when i'm trying to convert datagrid cell to string if it have null value and i want to make check if cell have null value i want to skip operation. Here is the example code ...more >>

I'm using business objects (as opposed to DataSets/DataTables) to contain all my data and I'm passing these to forms to populate them. They get sent to the form's constructors and populate all the controls onLoad, and when someone hits save, I validate all the values, then write them back to...more >>

If I bind multiple properties of a single control to different sources, only the first one ever works. For example, I subclass a TextBox and add an IsLocked property. I then add bindings for the Text property and my new IsLocked property, but only the first property will ever be bound. I can rev...more >>

I assumed that the CurrencyManager's ItemChanged event could be used to identify that some part of a row has changed and allow for the opportunity to ask the user if they want to keep the change (or not) prior to changing the CurrencyManager's position. I have found the that ItemChanged eve...more >>

Hello, I would like for WinForms Datagrid cells whose value has changed to stand out in some way - background color, font etc. I know that I can override the paint event to change cell appearance, but paint is not useful to me for detecting when cell contents have changed. I also know that I ...more >>

I am using Visual C# Express (.net 2.0) and I am wondering if there is a way to reset a form. I come from asp.net and I am used to binding the data in code during the page load event. Winforms offers databinding more like ms access, where you can bind the form directly to a dataset, but I pref...more >>

hi i'm a complete newby to the adonet stuff. so i'm facing beginner problems. i have a DataGrid bound to a table called data dataGrid.DataSource = data; data gets filled by a DataAdapter da da.fill(data); the table has two rows: "id" and "name". since i inserted a TableStyle to ...more >>

hi group!! my question is in a datagrid i have 3 columns, 2 columns are just text, third is type combobox, can i load in that combobox values from other table that is not the same the grid displays? (if true, how can i do it?) Thanks!! ...more >>

Hi all! I have a textbox which has a read-only proprety. which it's text can be selected and copied but not edited. but i didn't find readonly property for a combobox. setting enabled property to false will make it disabled. the text can't be selected or copied. What's the best way to hanle...more >>

When I open my form, the textbox is bound and will change when the position in the dataset is changed, but the combo box is blank. The items in the combobox list are populated. The combo's datasource is an ArrayList of Facility objects. The ID is being stored in the SelectedValue as I can deb...more >>

Hi all! I have a textbox which has a read-only proprety. which it's text can be selected and copied but not edited. but i didn't find readonly property for a combobox. setting enabled property to false will make it disabled. the text can't be selected or copied. What's the best way to han...more >>

How can we use multi threading and use them to read files into tex areas? 50 kb of data should be read and then there should be wait of second(should not use sleep()) and resume the remaining read upto nex 50kb after that -- ajij ------------------------------------------------------------...more >>

Hi, I have a datagrid with some columns that cause recalculation of values in controls elsewhere on my form. These recalculations need to occur when these datagrid cells have changed (I tied to the Validated event). This is also true for the AddNew row. My recalculation method currently re...more >>

Hi all, Situation: ---------- 1) I've created DataAdapters to about a dozen tables in msAccess (1 = adapter per table) 2) I've created a dataset using the visual XML designer in VS2003, addin= g = all the realtions=3D> results in dataset class "dsPS" 3) Retepeated step one for an ide...more >>

I have two columns in a datagrid - the first holds the "name" and the second holds the "value". Only the "value column should ever receive focus. How do I prevent focus from ever going to the first column? Thanks in advance, Mervin Williams ...more >>

I have Custom Collection with Custom Object which has Guid as Id - I bind DataGridView into it and it works BUT if I make one Column as DataGridViewComboBoxColumn the trouble becomes. If the DataGridViewComboBoxColumn ValueMember property type is Guid I get nice error when I try to insert a...more >>

I have created a class BoundList<T> class that implements IBindingList that wraps a List<T>. I create a List<T> and add four objects to it I set a BindingSource's DataSource property to an instance of this BoundList<T> class. I then set the DataGridView DataSource to the BindingSource. ...more >>

Hi, My program binds several controls on a WinForm to a Data Table via = CurrencyManager.=20 Example: txtComment.DataBindings.Add("Text", _currentDS.WithholdingTax, = "Comment"); txtComment.DataBindings[0].Parse +=3D new = ConvertEventHandler(frmMain_Parse); =20 .... _...more >>

hi all, I'm trying to do some very simple databinding, with a buttons enabled property and a custom class and i'm a bit confused. I have this: class Model { void BindGoButton(Button b) { b.DataBindings.Add(Enabled,this,"ShowGoButton"); } public bool ShowGoBut...more >>

Hi guys, I have 2 questions regarding this issue: 1st. Why this code gives me the lenght of the string instead the string itself? Dim a As New ArrayList a.Add(DirectCast(LProb_DataPassivos.Value.ToShortDateString, String)) a.Add(DirectCast(LProb_DescricaoPassivos.Text, String)...more >>

Hello How can I bind a column's value to another table? All tables are in the dataset already, I just have two tables and I bind table1 to the datagrid eg) table1 column....,level_id, level2_id,... level_id is a FK to table2, I want to show the level_name instead of level_id. ...more >>

Hi guys... I'm stuck! I'm devoloping this program and everything was doing fine, until now! This is what happends. <my VB.NET 2.0 code> Sub getUtenteIntoVariables(ByVal idUtente As String) Dim conn As New SqlClient.SqlConnection(connString) Dim cmd As New SqlC...more >>

I am new to windows forms programming, having done most of my projects in asp.net. I am working with a datagrid right now and it is giving me fits. Basically, in asp.net I would create the datagrid and set its events (such as OnItemCommand to add a record) to a procedure that would execute a s...more >>

Hi there, For a Control, is there an event that fires when a new Binding is being added to its DataBindings collection? Thanks in advance, -Benton ...more >>

I have a form with two DataGrids ad a ListBox. The first DataGrid and the ListBox both point to the master table. The second DataGrid points to the child table. If I change the record pointed to by the master DataGrid, the child DataGrid changes the records it shows. Also, the Listbox chang...more >>

In my application I retrieve a single record from the database and create a dataset using it. The form contains a tabcontrol with serveral pages. Each page has few controls added to it. The dataset is bound to different textboxes on different pages. I have a "Save" button to save the changes t...more >>

Hello. I have a form with a number of text boxes along with a number of buttons (Save, New, etc.). When I click on the New button I am essentially creating a new blank row in my dataset and then binding the dataset to my form controls. If after entering data into the textboxes and I call ...more >>

Is there a /thorough and exhaustive/ examination on how to effectively use Control.DataBindings.Add()?...more >>

Hi, I have a project written in Vb . net that runs on a pocket pc. In that project I use sql client object to connect SQL Server. In my connection string I set connect timeout to 15 seconds. But if there is a network error or something else it try to connect SQL Server without any exception...more >>

I'd like to bind combobox to a datasource and update a datasource whe combobox.text property is changed. I have a class with IBindingList interface implemented name -BarcodeList- that consists of the items with -IEditableObject implementation named Barcode. I also have a general class -mImag...more >>

I have a table with some columns that contain SQL Server DateTime data types. Sometimes there are null values in these fields. I want to bind a table to some DateTime controls however there is no way to set the DateTime control to a value of Null when necessary (I usually use 3rd party control...more >>

Is it not possible to define tablestyles for a datagrid bound to a dataView? Seems theres nothing to map a style to in the tablestyles editor. Anything, anyone? D.U. ...more >>

Can anyone tell me how to access one of the column's DataGridColumn from a DataRow? Mervin Williams ...more >>

I have two tables: Customers and Orders. Orders rows are related to Customer row through FK_CustomerID in the Orders table. I want to display orders in a dataGrid, but i want to show the Customers NAME, not ID in the grids rows. So an order looks like this in my grid: OrderID Custo...more >>