Cellvalidating e

If so, at the table level, after the data is queried and populated for the grid population, you could then... How to efectively validate data entry inside a Data Grid View. Late Validation: This validation is performed after the user is done entering data.Well, after doing some research and a bit of trial and error, found out a couple of approaches. For the specific project i was working in, it was the perfect choice.

Example: User edits row 1 and column 1, keeps by editing n columns from same row. Fire event with row 1 old content and row 1 new content.

Is this a good way of doing this, or did I miss something? If your data is coming from a "Data Table" or "Data View" (such as a queried result from a backend), a grid's bound data source could be of a Data View.

In order to implement Immediate validation, the event Cell Validation must be handled Ex The validation to check if the cell is in edit mode is very important. For the Late Validation, there must be an event that is perform once the user finish entering data.

In the implementation of this event, we would have to go through all the rows that have any info on them and perform the validation required, setting the appropiate error messages in the cell.

Load Dim conn As Sql Connection Dim str Conn As String Dim str SQL As String Dim da As Sql Data Adapter str Conn = "Server = (local);" str Conn &= "Database = North Wind;" str Conn &= "Integrated Security = SSPI;" conn = New Sql Connection(str Conn) da = New Sql Data Adapter("Select * From Products", conn) da. Table Name Dim col Discontinued As New Data Grid Bool Column With col Discontinued .

Width = 80 End With Dim col Name As New Data Grid Text Box Column With col Name .

Leave If is Editing Then Set Column Value At Row(cm Source, m Row Num, Column Combo Box. Private Sub Form1_Load(By Val sender As Object, By Val e _ As System.

Column Started Editing(Direct Cast(sender, Control)) End Sub Private Sub Leave Combo Box(By Val sender As Object, By Val e As Event Args) _ Handles Column Combo Box. Wnd Proc(m) End If End Sub /// This is a sample how to use it \\Sample to use the simple datagrid combobox it needs a form with a datagrid.

Hide() End Sub Protected Overrides Function Get Column Value At Row(By Val source As System. Get Column Value At Row(source, row Num)) Return str Values(int Value) End Function End Class Public Class No Key Up Combo Inherits Combo Box Protected Overrides Sub Wnd Proc(By Ref m As System. New() Column Combo Box = New No Key Up Combo Add Handler Column Combo Box.

Selected Index) is Editing = False Invalidate() End If Column Combo Box. Currency Manager, By Val row Num As Integer) As Object Dim int Value As Integer int Value = CInt(My Base. At the end of the sample is showed how to use it Be aware this is a Tip for a Windows Forms Data Grid not a Data Grid View Public Class Data Grid Combo Box Column Inherits Data Grid Text Box Column Public With Events Column Combo Box As No Key Up Combo 'special class Private With Events cm Source As Currency Manager Private m Row Num As Integer Private is Editing As Boolean Shared Sub New() End Sub Public Sub New() My Base.

If you are going to perform complex and multiple validation, you should try the second approach.

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