Error during ValueChanged for Checkbox

[Stephane]

Hi,
I try to use the RadDataGridWiew to binding my collection of Object.

I define 5 columns wich one is a checkboxcolumn.

But when i click on the checkboxcell, the datagridwiew throw an exception "Data Exception".
the error indicates that it's impossible to convert the value "Off" to boolean type.

???

Best regards.

[Richard Slade]

Hello,

In your object collection, you need to return a boolean for the checkbox column. Please try the following simple code exmaple (just a grid on a form) which should help to show how to add a checkbox column.

Imports Telerik.WinControls.UI
Imports Telerik.WinControls

Public Class Form1

    Public Sub New()
        InitializeComponent()
    End Sub


    Private Sub Form1_Load(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles MyBase.Load

        Dim people As New List(Of Person)
        people.Add(New Person(1, "Richard", False))
        people.Add(New Person(1, "Bob", False))
        people.Add(New Person(1, "Peter", True))
        people.Add(New Person(1, "Stew", Nothing))

        Me.RadGridView1.AutoGenerateColumns = False

        Me.RadGridView1.Columns.Add(New GridViewDecimalColumn("Id", "Id"))
        Me.RadGridView1.Columns.Add(New GridViewTextBoxColumn("Name", "Name"))
        Me.RadGridView1.Columns.Add(New GridViewCheckBoxColumn("HasBeard", "HasBeard"))

        Me.RadGridView1.DataSource = people

    End Sub


End Class

Public Class Person
    Private m_Id As Integer
    Private m_Name As String
    Private m_HasBeard As Boolean

    Public Sub New(ByVal id As Integer, ByVal name As String, ByVal hasBeard As Boolean)
        m_Name = name
        m_Id = id
        m_HasBeard = hasBeard
    End Sub

    Public Property Name() As String
        Get
            Return m_Name
        End Get
        Set(ByVal value As String)
            m_Name = value
        End Set
    End Property

    Public Property Id() As Integer
        Get
            Return m_Id
        End Get
        Set(ByVal value As Integer)
            m_Id = value
        End Set
    End Property

    Public Property HasBeard() As Boolean
        Get
            Return m_HasBeard
        End Get
        Set(ByVal value As Boolean)
            m_HasBeard = value
        End Set
    End Property

End Class

If you need further help, please let me know.
Richard

[Richard Slade]

Hello,

Here is also a help article on GridViewCheckBoxColumn

Let me know if you need further help
Richard