Επεξεργασία

Κοινή χρήση μέσω

Control.Render(HtmlTextWriter) Method

  • Reference

Definition

Namespace:
System.Web.UI
Assembly:
System.Web.dll

Sends server control content to a provided HtmlTextWriter object, which writes the content to be rendered on the client.

protected:
 virtual void Render(System::Web::UI::HtmlTextWriter ^ writer);
protected public:
 virtual void Render(System::Web::UI::HtmlTextWriter ^ writer);
protected virtual void Render (System.Web.UI.HtmlTextWriter writer);
protected internal virtual void Render (System.Web.UI.HtmlTextWriter writer);
abstract member Render : System.Web.UI.HtmlTextWriter -> unit
override this.Render : System.Web.UI.HtmlTextWriter -> unit
Protected Overridable Sub Render (writer As HtmlTextWriter)
Protected Friend Overridable Sub Render (writer As HtmlTextWriter)

Parameters

writer
HtmlTextWriter

The HtmlTextWriter object that receives the server control content.

Examples

The following code example demonstrates overriding the Render method. The HasControls method is used to determine whether the server control has any child controls stored in its ControlCollection object, which is accessible through the Control.Controls property. If HasControls returns true and the first server control in the collection is literal text, then the literal text is appended to an HTML string.

[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
protected override void Render(HtmlTextWriter output) {
    if ( (HasControls()) && (Controls[0] is LiteralControl) ) {
        output.Write("<H2>Your Message: " + ((LiteralControl) Controls[0]).Text + "</H2>");
    }
}

<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Sub Render(Output As HtmlTextWriter)
    If HasControls() And TypeOf Controls(0) Is LiteralControl
        Dim Ctrl As LiteralControl = CType(Controls(0), LiteralControl)
        Output.Write("<H2>Your Message: " & Ctrl.Text & "</H2>")
    End If
End Sub

Remarks

When developing custom server controls, you can override this method to generate content for an ASP.NET page.

Applies to

See also