.NET Framework Class Library
ControlDesignerSetEditableDesignerRegionContent Method

Specifies the content for an editable region of the control at design time.

Namespace:   System.Web.UI.Design
Assembly:  System.Design (in System.Design.dll)
Public Overridable Sub SetEditableDesignerRegionContent ( _
	region As [%$TOPIC/3y655tak_en-us_VS_110_1_0_0_0_0%], _
	content As [%$TOPIC/3y655tak_en-us_VS_110_1_0_0_0_1%] _
public virtual void SetEditableDesignerRegionContent(
	[%$TOPIC/3y655tak_en-us_VS_110_1_0_1_0_0%] region,
	[%$TOPIC/3y655tak_en-us_VS_110_1_0_1_0_1%] content
virtual void SetEditableDesignerRegionContent(
	[%$TOPIC/3y655tak_en-us_VS_110_1_0_2_0_0%]^ region, 
	[%$TOPIC/3y655tak_en-us_VS_110_1_0_2_0_1%]^ content
abstract SetEditableDesignerRegionContent : 
        region:[%$TOPIC/3y655tak_en-us_VS_110_1_0_3_0_0%] * 
        content:[%$TOPIC/3y655tak_en-us_VS_110_1_0_3_0_1%] -> unit  
override SetEditableDesignerRegionContent : 
        region:[%$TOPIC/3y655tak_en-us_VS_110_1_0_3_0_2%] * 
        content:[%$TOPIC/3y655tak_en-us_VS_110_1_0_3_0_3%] -> unit


Type: System.Web.UI.DesignEditableDesignerRegion

An editable design region contained within the control.

Type: SystemString

The content to assign for the editable design region.


Classes deriving from the ControlDesigner class can support region-based editing on the design surface and override the SetEditableDesignerRegionContent method to set the content for a specified region.


The following code example shows how to get a reference to the design host, and then use the reference to create a ControlParser object that turns content into an instance of the ITemplate interface and assigns the ITemplate instance to the appropriate view.

' Create a template from the content string and put it  
' in the selected view. Called by the designer host? 
Public Overrides Sub SetEditableDesignerRegionContent(ByVal region As EditableDesignerRegion, ByVal content As String)
    If IsNothing(content) Then 
    End If 

    ' Get a reference to the designer host 
    Dim host As IDesignerHost = CType(Component.Site.GetService(GetType(IDesignerHost)), IDesignerHost)
    If Not IsNothing(host) Then 
        ' Create a template from the content string 
        Dim template As ITemplate = ControlParser.ParseTemplate(host, content)

        ' Determine which region should get the template 
        If region.Name.EndsWith("0") Then
            myControl.View1 = template
        ElseIf region.Name.EndsWith("1") Then
            myControl.View2 = template
        End If 

    End If 
End Sub
// Create a template from the content string and   
// put it in the selected view. 
public override void SetEditableDesignerRegionContent(EditableDesignerRegion region, string content)
    if (content == null)

    // Get a reference to the designer host
    IDesignerHost host = (IDesignerHost)Component.Site.GetService(typeof(IDesignerHost));
    if (host != null)
        // Create a template from the content string
        ITemplate template = ControlParser.ParseTemplate(host, content);

        // Determine which region should get the template 
        // Either 'Content0' or 'Content1' 
        if (region.Name.EndsWith("0"))
            myControl.View1 = template;
        else if (region.Name.EndsWith("1"))
            myControl.View2 = template;
Version Information

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Security

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.