TableDesigner Class
Definition
Important
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Extends design-time behavior for the Table Web server control.
public ref class TableDesigner : System::Web::UI::Design::ControlDesignerpublic class TableDesigner : System.Web.UI.Design.ControlDesigner[System.Web.UI.Design.SupportsPreviewControl(true)]
public class TableDesigner : System.Web.UI.Design.ControlDesignertype TableDesigner = class
inherit ControlDesigner[<System.Web.UI.Design.SupportsPreviewControl(true)>]
type TableDesigner = class
inherit ControlDesignerPublic Class TableDesigner
Inherits ControlDesigner- Inheritance
- Attributes
Examples
The section contains two code examples. The first code example demonstrates how to derive a class from the TableDesigner class. The second code example demonstrates how to display the StyledTable class at design time.
The following code example demonstrates how to create a designer class named StyledTableDesigner, which is derived from the TableDesigner class, and is used to display two cells at design time for a class that is derived from the Table class.
' Create a class, named StyledTableDesigner,
' that derives from the TableDesigner class.
' This class displays a class named StyledTable
' at design time.
Public Class StyledTableDesigner
Inherits TableDesigner
' Override the GetDesignTimeHtml method to display
' placeholder text at design time for the
' rows and cells of the StyledTable class.
Public Overrides Function GetDesignTimeHtml() As String
Dim sTable As StyledTable = CType(Component, StyledTable)
Dim designTimeHTML As String
Dim rows As TableRowCollection = sTable.Rows
Dim cellsWithDummyContents As ArrayList = Nothing
Dim emptyTable As Boolean = rows.Count = 0
Dim emptyRows As Boolean = False
Dim counter As Integer = 1
Dim numcells As Integer = 2
Try
' Create two cells to display
' in a row at design time.
If emptyTable Then
Dim row As TableRow = New TableRow()
rows.Add(row)
Dim i As Integer
For i = 0 To numcells - 1
Dim c As TableCell = New TableCell()
c.Text = "Cell #" & counter.ToString()
counter += 1
rows(0).Cells.Add(c)
Next i
Else
emptyRows = True
Dim j As Integer
For j = 0 To rows.Count - 1
If rows(j).Cells.Count <> 0 Then
emptyRows = False
Exit For
End If
Next j
If emptyRows = True Then
Dim k As Integer
For k = 0 To numcells - 1
Dim c As TableCell = New TableCell()
c.Text = "Cell #" & counter.ToString()
counter += 1
rows(0).Cells.Add(c)
Next k
End If
End If
If emptyTable = False Then
' If the rows and cells were defined by the user, but the
' cells remain empty this code defines a string to display
' in them at design time.
Dim row As TableRow
For Each row In rows
Dim c As TableCell
For Each c In row.Cells
If ((c.Text.Length = 0) AndAlso (c.HasControls() = False)) Then
If cellsWithDummyContents Is Nothing Then
cellsWithDummyContents = New ArrayList()
End If
cellsWithDummyContents.Add(c)
c.Text = "Cell #" & counter.ToString()
counter += 1
End If
Next c
Next row
End If
' Retrieve the design-time HTML for the StyledTable class.
designTimeHTML = MyBase.GetDesignTimeHtml()
Finally
' If the StyledTable was empty before the dummy text was added,
' restore it to that state.
If emptyTable Then
rows.Clear()
Else
' Clear the cells that were empty before the dummy text
' was added.
If Not (cellsWithDummyContents Is Nothing) Then
Dim c As TableCell
For Each c In cellsWithDummyContents
c.Text = [String].Empty
Next c
End If
If emptyRows Then
rows(0).Cells.Clear()
End If
End If
End Try
Return designTimeHTML
End Function
End Class
The following code example uses the DesignerAttribute to associate the StyledTableDesigner class with the StyledTable class so that it can be displayed at design time.
' Create a class that uses the StyledTableDesigner
' class to display its contents at design time.
<Designer("Examples.AspNet.Design.StyledTableDesigner", "TableDesigner")> _
Public Class StyledTable
Inherits Table
Private tableStyle As Style = New Style()
Public Sub New()
tableStyle.BackColor = Color.LightBlue
tableStyle.BorderColor = Color.Black
CellSpacing = 4
CellPadding = 0
GridLines = GridLines.None
BorderWidth = Unit.Point(1)
Width = Unit.Percentage(100)
Height = Unit.Percentage(100)
End Sub
End Class
Constructors
| TableDesigner() |
Initializes a new instance of the TableDesigner class. |
Properties
| ActionLists |
Gets the action list collection for the control designer. (Inherited from ControlDesigner) |
| AllowResize |
Gets a value indicating whether the control can be resized in the design-time environment. (Inherited from ControlDesigner) |
| AssociatedComponents |
Gets the collection of components associated with the component managed by the designer. (Inherited from ComponentDesigner) |
| AutoFormats |
Gets the collection of predefined automatic formatting schemes to display in the Auto Format dialog box for the associated control at design time. (Inherited from ControlDesigner) |
| Behavior |
Obsolete.
Gets or sets the DHTML behavior that is associated with the designer. (Inherited from HtmlControlDesigner) |
| Component |
Gets the component this designer is designing. (Inherited from ComponentDesigner) |
| DataBindings |
Gets the data bindings collection for the current control. (Inherited from HtmlControlDesigner) |
| DataBindingsEnabled |
Gets a value indicating whether data binding is supported by the containing region for the associated control. (Inherited from ControlDesigner) |
| DesignerState |
Gets an object that is used to persist data for the associated control at design time. (Inherited from ControlDesigner) |
| DesignTimeElement |
Obsolete.
Gets the design-time object representing the control that is associated with the HtmlControlDesigner object on the design surface. (Inherited from HtmlControlDesigner) |
| DesignTimeElementView |
Obsolete.
Gets the view-control object for the control designer. (Inherited from ControlDesigner) |
| DesignTimeHtmlRequiresLoadComplete |
Obsolete.
Gets a value indicating whether the design host must finish loading before the GetDesignTimeHtml method can be called. (Inherited from ControlDesigner) |
| Expressions |
Gets the expression bindings for the current control at design time. (Inherited from HtmlControlDesigner) |
| HidePropertiesInTemplateMode |
Gets a value indicating whether the properties of the associated control are hidden when the control is in template mode. (Inherited from ControlDesigner) |
| ID |
Gets or sets the ID string for the control. (Inherited from ControlDesigner) |
| InheritanceAttribute |
Gets an attribute that indicates the type of inheritance of the associated component. (Inherited from ComponentDesigner) |
| Inherited |
Gets a value indicating whether this component is inherited. (Inherited from ComponentDesigner) |
| InTemplateMode |
Gets a value indicating whether the control is in either template viewing or editing mode in the design host. The InTemplateMode property is read-only. (Inherited from ControlDesigner) |
| IsDirty |
Obsolete.
Gets or sets a value indicating whether the Web server control has been marked as changed. (Inherited from ControlDesigner) |
| ParentComponent |
Gets the parent component for this designer. (Inherited from ComponentDesigner) |
| ReadOnly |
Obsolete.
Gets or sets a value indicating whether the properties of the control are read-only at design time. (Inherited from ControlDesigner) |
| RootDesigner |
Gets the control designer for the Web Forms page that contains the associated control. (Inherited from ControlDesigner) |
| SetTextualDefaultProperty | (Inherited from ComponentDesigner) |
| ShadowProperties |
Gets a collection of property values that override user settings. (Inherited from ComponentDesigner) |
| ShouldCodeSerialize |
Obsolete.
Gets or sets a value indicating whether to create a field declaration for the control in the code-behind file for the current design document during serialization. (Inherited from HtmlControlDesigner) |
| Tag |
Gets an object representing the HTML markup element for the associated control. (Inherited from ControlDesigner) |
| TemplateGroups |
Gets a collection of template groups, each containing one or more template definitions. (Inherited from ControlDesigner) |
| UsePreviewControl |
Gets a value indicating whether the control designer uses a temporary preview control to generate the design-time HTML markup. (Inherited from ControlDesigner) |
| Verbs |
Gets the design-time verbs supported by the component that is associated with the designer. (Inherited from ComponentDesigner) |
| ViewControl |
Gets or sets a Web server control that can be used for previewing the design-time HTML markup. (Inherited from ControlDesigner) |
| ViewControlCreated |
Gets or sets a value indicating whether a |
| Visible |
Gets a value that indicates whether the control is visible at design time. (Inherited from ControlDesigner) |
Methods
| CreateErrorDesignTimeHtml(String, Exception) |
Creates the HTML markup to display a specified exception error message at design time. (Inherited from ControlDesigner) |
| CreateErrorDesignTimeHtml(String) |
Creates HTML markup to display a specified error message at design time. (Inherited from ControlDesigner) |
| CreatePlaceHolderDesignTimeHtml() |
Provides a simple rectangular placeholder representation that displays the type and ID of the control. (Inherited from ControlDesigner) |
| CreatePlaceHolderDesignTimeHtml(String) |
Provides a simple rectangular placeholder representation that displays the type and ID of the control, and also additional specified instructions or information. (Inherited from ControlDesigner) |
| CreateViewControl() |
Returns a copy of the associated control for viewing or rendering on the design surface. (Inherited from ControlDesigner) |
| Dispose() |
Releases all resources used by the ComponentDesigner. (Inherited from ComponentDesigner) |
| Dispose(Boolean) |
Releases the unmanaged resources that are used by the HtmlControlDesigner object and optionally releases the managed resources. (Inherited from HtmlControlDesigner) |
| DoDefaultAction() |
Creates a method signature in the source code file for the default event on the component and navigates the user's cursor to that location. (Inherited from ComponentDesigner) |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetBounds() |
Retrieves the coordinates of the rectangle representing the boundaries for the control as displayed on the design surface. (Inherited from ControlDesigner) |
| GetDesignTimeHtml() |
Gets the HTML that is used to represent the control at design time. |
| GetDesignTimeHtml(DesignerRegionCollection) |
Retrieves the HTML markup to display the control and populates the collection with the current control designer regions. (Inherited from ControlDesigner) |
| GetEditableDesignerRegionContent(EditableDesignerRegion) |
Returns the content for an editable region of the design-time view of the associated control. (Inherited from ControlDesigner) |
| GetEmptyDesignTimeHtml() |
Retrieves the HTML markup to represent a Web server control at design time that will have no visual representation at run time. (Inherited from ControlDesigner) |
| GetErrorDesignTimeHtml(Exception) |
Retrieves the HTML markup that provides information about the specified exception. (Inherited from ControlDesigner) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetPersistenceContent() |
Retrieves the persistable inner HTML markup of the control at design time. (Inherited from ControlDesigner) |
| GetPersistInnerHtml() |
This member overrides GetPersistInnerHtml(). |
| GetPersistInnerHtml() |
Obsolete.
Retrieves the persistable inner HTML markup of the control. (Inherited from ControlDesigner) |
| GetService(Type) |
Attempts to retrieve the specified type of service from the design mode site of the designer's component. (Inherited from ComponentDesigner) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| GetViewRendering() |
Retrieves an object that contains the design-time markup for the content and regions of the associated control. (Inherited from ControlDesigner) |
| Initialize(IComponent) |
Initializes the control designer and loads the specified component. (Inherited from ControlDesigner) |
| InitializeExistingComponent(IDictionary) |
Reinitializes an existing component. (Inherited from ComponentDesigner) |
| InitializeNewComponent(IDictionary) |
Initializes a newly created component. (Inherited from ComponentDesigner) |
| InitializeNonDefault() |
Obsolete.
Obsolete.
Initializes the settings for an imported component that is already initialized to settings other than the defaults. (Inherited from ComponentDesigner) |
| Invalidate() |
Invalidates the whole area of the control that is displayed on the design surface and signals the control designer to redraw the control. (Inherited from ControlDesigner) |
| Invalidate(Rectangle) |
Invalidates the specified area of the control that is displayed on the design surface and signals the control designer to redraw the control. (Inherited from ControlDesigner) |
| InvokeGetInheritanceAttribute(ComponentDesigner) |
Gets the InheritanceAttribute of the specified ComponentDesigner. (Inherited from ComponentDesigner) |
| IsPropertyBound(String) |
Obsolete.
Retrieves a value indicating whether the specified property on the associated control is data-bound. (Inherited from ControlDesigner) |
| Localize(IDesignTimeResourceWriter) |
Uses the provided resource writer to persist the localizable properties of the associated control to a resource in the design host. (Inherited from ControlDesigner) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| OnAutoFormatApplied(DesignerAutoFormat) |
Called when a predefined, automatic formatting scheme has been applied to the associated control. (Inherited from ControlDesigner) |
| OnBehaviorAttached() |
Called when the control designer is attached to a Behavior object. (Inherited from ControlDesigner) |
| OnBehaviorDetaching() |
Obsolete.
Called when a behavior disassociates from the element. (Inherited from HtmlControlDesigner) |
| OnBindingsCollectionChanged(String) |
Obsolete.
Called when the data-binding collection changes. (Inherited from ControlDesigner) |
| OnClick(DesignerRegionMouseEventArgs) |
Called by the design host when the user clicks the associated control at design time. (Inherited from ControlDesigner) |
| OnComponentChanged(Object, ComponentChangedEventArgs) |
Called when the associated control changes. (Inherited from ControlDesigner) |
| OnComponentChanging(Object, ComponentChangingEventArgs) |
Represents the method that will handle the ComponentChanging event for the associated control. (Inherited from ControlDesigner) |
| OnControlResize() |
Obsolete.
Called when the associated Web server control has been resized in the design host at design time. (Inherited from ControlDesigner) |
| OnPaint(PaintEventArgs) |
Called when the control designer draws the associated control on the design surface, if the CustomPaint value is |
| OnSetComponentDefaults() |
Obsolete.
Obsolete.
Sets the default properties for the component. (Inherited from ComponentDesigner) |
| OnSetParent() |
Provides a way to perform additional processing when the associated control is attached to a parent control. (Inherited from HtmlControlDesigner) |
| PostFilterAttributes(IDictionary) |
Allows a designer to change or remove items from the set of attributes that it exposes through a TypeDescriptor. (Inherited from ComponentDesigner) |
| PostFilterEvents(IDictionary) |
Allows a designer to change or remove items from the set of events that it exposes through a TypeDescriptor. (Inherited from ComponentDesigner) |
| PostFilterProperties(IDictionary) |
Allows a designer to change or remove items from the set of properties that it exposes through a TypeDescriptor. (Inherited from ComponentDesigner) |
| PreFilterAttributes(IDictionary) |
Allows a designer to add to the set of attributes that it exposes through a TypeDescriptor. (Inherited from ComponentDesigner) |
| PreFilterEvents(IDictionary) |
Sets the list of events that are exposed at design-time for the TypeDescriptor object for the component. (Inherited from HtmlControlDesigner) |
| PreFilterProperties(IDictionary) |
Adds properties to or removes properties from the Properties grid in a design host at design time or provides new design-time properties that might correspond to properties on the associated control. (Inherited from ControlDesigner) |
| RaiseComponentChanged(MemberDescriptor, Object, Object) |
Notifies the IComponentChangeService that this component has been changed. (Inherited from ComponentDesigner) |
| RaiseComponentChanging(MemberDescriptor) |
Notifies the IComponentChangeService that this component is about to be changed. (Inherited from ComponentDesigner) |
| RaiseResizeEvent() |
Obsolete.
Raises the OnControlResize() event. (Inherited from ControlDesigner) |
| RegisterClone(Object, Object) |
Registers internal data in a cloned control. (Inherited from ControlDesigner) |
| SetEditableDesignerRegionContent(EditableDesignerRegion, String) |
Specifies the content for an editable region of the control at design time. (Inherited from ControlDesigner) |
| SetRegionContent(EditableDesignerRegion, String) |
Specifies the content for an editable region in the design-time view of the control. (Inherited from ControlDesigner) |
| SetViewFlags(ViewFlags, Boolean) |
Assigns the specified bitwise ViewFlags enumeration to the specified flag value. (Inherited from ControlDesigner) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
| UpdateDesignTimeHtml() |
Refreshes the design-time HTML markup for the associated Web server control by calling the GetDesignTimeHtml method. (Inherited from ControlDesigner) |
