Private Sub Validate Year() Dim o Inv Year As New Collection Dim o Error Msg As New System. String Builder Dim bln Err Found As Boolean = False 'Loop through year column and check for number, if blank skip' For i As Integer = 0 To dgv Intervals. Row Validating Dim row As Data Grid View Row = Data Grid View1. Row Index) For Each cell As Data Grid View Cell In row. I did a little sample for you, I hope this help you with your problem. It has 6 columns and 6 rows (which will never change). At first I created this entity to fill my gridview: As you can see is pretty simple, I would not recommend you to use this approach if you are loading too many records with many columns, because that could affect performance, but in your case I think this should works. My answer is with visual C#, because when I read it you did not mention the language, and now you just changed it.When a user enters data in a cell under any column, I want to make sure they fill in the rest of the cells for that row. provides a convenient way to realize data validation before it is committed to the underlying data source.SOLUTION To achieve data validation prior the row is committed, you can handle the Cell Validating event, which is raised by the control when the current cell changes or when it goes out of edit mode.
Afterwards, you should have a fully-functional program that will allow you to view the data in the Data Table. When an input error occurs, there will be a little red exclamation point at that cell location.Notice how the Column Index and Row Index properties of Data Grid View Cell Validating Event Args parameter are used.At run time, if the validation fails, the Data Grid View displays a red exclamation icon in that cell (see below).From Visual Studio, all you'd have to do is add the MDB file to the project and it will automatically launch the Data Source Conversion Wizard. You can perform most of these tweaks by either using the designer or via code. Padding = p ' set the monetary string format style.At the conclusion of this wizard, you'll have a strongly-typed dataset, a Table Adapter, and Data Table added to your project. Products) End Sub ' ' Save the changes you've made via the Data Grid View back to the ' underlying database ' Private Sub bn Update_Click(By Val sender As System. Let's look at how you could perform some simple tweaks in a column that contains a Money field. Format = "$#.00" ' apply the style to the column Data Grid View1. Default Cell Style = style The major technique for detected errors in a Data Grid View is by the Row Validating event.