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No puedo entrar en modo diseño del formulario RRS feed

  • Pregunta

  • Buenas tengo este codigo pero no puedo entrar en modo diseño en el formulario

    'INTRODUCE COLUMNA CON CALENDARIO
    Imports System
    Imports System.Windows.Forms
    Public Class CalendarColumn
        Inherits DataGridViewColumn
    
        Public Sub New()
            MyBase.New(New CalendarCell())
        End Sub
    
        Public Overrides Property CellTemplate() As DataGridViewCell
            Get
                Return MyBase.CellTemplate
            End Get
            Set(ByVal value As DataGridViewCell)
    
                ' Ensure that the cell used for the template is a CalendarCell.
                If (value IsNot Nothing) AndAlso _
                    Not value.GetType().IsAssignableFrom(GetType(CalendarCell)) _
                    Then
                    Throw New InvalidCastException("Must be a CalendarCell")
                End If
                MyBase.CellTemplate = value
    
            End Set
        End Property
    
    
        Private Sub InitializeComponent()
    
        End Sub
    
    
    End Class
    Public Class CalendarCell
        Inherits DataGridViewTextBoxCell
    
        Public Sub New()
            ' Use the short date format.
            Me.Style.Format = "d"
        End Sub
    
        Public Overrides Sub InitializeEditingControl(ByVal rowIndex As Integer, _
            ByVal initialFormattedValue As Object, _
            ByVal dataGridViewCellStyle As DataGridViewCellStyle)
    
            ' Set the value of the editing control to the current cell value.
            MyBase.InitializeEditingControl(rowIndex, initialFormattedValue, _
                dataGridViewCellStyle)
    
            Dim ctl As CalendarEditingControl = _
                CType(DataGridView.EditingControl, CalendarEditingControl)
    
            ' Use the default row value when Value property is null.
            If (Me.Value Is Nothing) Then
                ctl.Value = CType(Me.DefaultNewRowValue, DateTime)
            Else
                ctl.Value = CType(Me.Value, DateTime)
            End If
        End Sub
    
        Public Overrides ReadOnly Property EditType() As Type
            Get
                ' Return the type of the editing control that CalendarCell uses.
                Return GetType(CalendarEditingControl)
            End Get
        End Property
    
        Public Overrides ReadOnly Property ValueType() As Type
            Get
                ' Return the type of the value that CalendarCell contains.
                Return GetType(DateTime)
            End Get
        End Property
    
        Public Overrides ReadOnly Property DefaultNewRowValue() As Object
            Get
                ' Use the current date and time as the default value.
                Return DateTime.Now
            End Get
        End Property
    
    End Class
    Class CalendarEditingControl
        Inherits DateTimePicker
        Implements IDataGridViewEditingControl
    
        Private dataGridViewControl As DataGridView
        Private valueIsChanged As Boolean = False
        Private rowIndexNum As Integer
    
        Public Sub New()
            Me.Format = DateTimePickerFormat.Short
        End Sub
    
        Public Property EditingControlFormattedValue() As Object _
            Implements IDataGridViewEditingControl.EditingControlFormattedValue
    
            Get
                Return Me.Value.ToShortDateString()
            End Get
    
            Set(ByVal value As Object)
                Try
                    ' This will throw an exception of the string is 
                    ' null, empty, or not in the format of a date.
                    Me.Value = DateTime.Parse(CStr(value))
                Catch
                    ' In the case of an exception, just use the default
                    ' value so we're not left with a null value.
                    Me.Value = DateTime.Now
                End Try
            End Set
    
        End Property
    
        Public Function GetEditingControlFormattedValue(ByVal context _
            As DataGridViewDataErrorContexts) As Object _
            Implements IDataGridViewEditingControl.GetEditingControlFormattedValue
    
            Return Me.Value.ToShortDateString()
    
        End Function
    
        Public Sub ApplyCellStyleToEditingControl(ByVal dataGridViewCellStyle As  _
            DataGridViewCellStyle) _
            Implements IDataGridViewEditingControl.ApplyCellStyleToEditingControl
    
            Me.Font = dataGridViewCellStyle.Font
            Me.CalendarForeColor = dataGridViewCellStyle.ForeColor
            Me.CalendarMonthBackground = dataGridViewCellStyle.BackColor
    
        End Sub
    
        Public Property EditingControlRowIndex() As Integer _
            Implements IDataGridViewEditingControl.EditingControlRowIndex
    
            Get
                Return rowIndexNum
            End Get
            Set(ByVal value As Integer)
                rowIndexNum = value
            End Set
    
        End Property
    
        Public Function EditingControlWantsInputKey(ByVal key As Keys, _
            ByVal dataGridViewWantsInputKey As Boolean) As Boolean _
            Implements IDataGridViewEditingControl.EditingControlWantsInputKey
    
            ' Let the DateTimePicker handle the keys listed.
            Select Case key And Keys.KeyCode
                Case Keys.Left, Keys.Up, Keys.Down, Keys.Right, _
                    Keys.Home, Keys.End, Keys.PageDown, Keys.PageUp
    
                    Return True
    
                Case Else
                    Return Not dataGridViewWantsInputKey
            End Select
    
        End Function
    
        Public Sub PrepareEditingControlForEdit(ByVal selectAll As Boolean) _
            Implements IDataGridViewEditingControl.PrepareEditingControlForEdit
    
            ' No preparation needs to be done.
    
        End Sub
    
        Public ReadOnly Property RepositionEditingControlOnValueChange() _
            As Boolean Implements _
            IDataGridViewEditingControl.RepositionEditingControlOnValueChange
    
            Get
                Return False
            End Get
    
        End Property
    
        Public Property EditingControlDataGridView() As DataGridView _
            Implements IDataGridViewEditingControl.EditingControlDataGridView
    
            Get
                Return dataGridViewControl
            End Get
            Set(ByVal value As DataGridView)
                dataGridViewControl = value
            End Set
    
        End Property
    
        Public Property EditingControlValueChanged() As Boolean _
            Implements IDataGridViewEditingControl.EditingControlValueChanged
    
            Get
                Return valueIsChanged
            End Get
            Set(ByVal value As Boolean)
                valueIsChanged = value
            End Set
    
        End Property
    
        Public ReadOnly Property EditingControlCursor() As Cursor _
            Implements IDataGridViewEditingControl.EditingPanelCursor
    
            Get
                Return MyBase.Cursor
            End Get
    
        End Property
    
        Protected Overrides Sub OnValueChanged(ByVal eventargs As EventArgs)
    
            ' Notify the DataGridView that the contents of the cell have changed.
            valueIsChanged = True
            Me.EditingControlDataGridView.NotifyCurrentCellDirty(True)
            MyBase.OnValueChanged(eventargs)
    
        End Sub
    
    End Class
    'INTRODUCE COLUMNA CON CALENDARIO
    Public Class Form2
    
        Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
            'Handles Me.Load
            'Me.Controls.Add(Me.dataGridView1)
            'INTRODUCE COLUMNA CON CALENDARIO
            Dim col As New CalendarColumn()
            Me.DataGridView1.Columns.Add(col)
            Me.DataGridView1.RowCount = 5
            Dim row As DataGridViewRow
            For Each row In Me.DataGridView1.Rows
                row.Cells(0).Value = DateTime.Now
            Next row
            'INTRODUCE COLUMNA CON CALENDARIO
        End Sub
    End Class

    domingo, 8 de mayo de 2016 11:23

Respuestas

  • Para que el diseñador funcione la clase del formulario debe ser la primera en tu archivo de código.

    Puedes definir más clases en el mismo archivo pero la primera debe ser la del formulario.

    Simplemente pon la clase Form2 al principio del código del archivo.


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    • Marcado como respuesta JETET domingo, 8 de mayo de 2016 12:42
    domingo, 8 de mayo de 2016 11:47

Todas las respuestas

  • Para que el diseñador funcione la clase del formulario debe ser la primera en tu archivo de código.

    Puedes definir más clases en el mismo archivo pero la primera debe ser la del formulario.

    Simplemente pon la clase Form2 al principio del código del archivo.


    Píldoras .NET
    Artículos, tutoriales y ejemplos de código .NET

    Píldoras JS
    Artículos, tutoriales y ejemplos de código JavaScript, HTML5, CSS3, ...

    • Marcado como respuesta JETET domingo, 8 de mayo de 2016 12:42
    domingo, 8 de mayo de 2016 11:47
  • Valla tonteria pero si no se sabe una tontertia puede ser un problema 1000 gracias

    domingo, 8 de mayo de 2016 12:42