編輯

共用方式為

HtmlSelectBuilder.GetChildControlType(String, IDictionary) Method

  • Reference

Definition

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

Obtains the Type for the HtmlSelect control's child controls.

public:
 override Type ^ GetChildControlType(System::String ^ tagName, System::Collections::IDictionary ^ attribs);
public override Type GetChildControlType (string tagName, System.Collections.IDictionary attribs);
override this.GetChildControlType : string * System.Collections.IDictionary -> Type
Public Overrides Function GetChildControlType (tagName As String, attribs As IDictionary) As Type

Parameters

tagName
String

The tag name of the child control.

attribs
IDictionary

An array of attributes contained in the child control.

Returns

Type

The Type of the HtmlSelect control's specified child control.

Examples

The following code example demonstrates how to override the GetChildControlType method to check for custom child control types. For a complete, working code example, see the HtmlSelectBuilder class overview topic.

[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
public override Type GetChildControlType(string tagName, IDictionary attribs)
{
    // Distinguish between two possible types of child controls.
    if (tagName.ToLower().EndsWith("myoption1"))
    {
        return typeof(MyOption1);
    }
    else if (tagName.ToLower().EndsWith("myoption2"))
    {
        return typeof(MyOption2);
    }
    return null;
}

<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public Overrides Function GetChildControlType(ByVal tagName As String, ByVal attribs As IDictionary) As Type

    ' Distinguish between two possible types of child controls.
    If tagName.ToLower().EndsWith("myoption1") Then
        Return GetType(MyOption1)
    ElseIf tagName.ToLower().EndsWith("myoption2") Then
        Return GetType(MyOption2)
    End If
    Return Nothing

End Function

Remarks

Use the GetChildControlType method to return the Type of a specified child control in an HtmlSelect control.

Applies to

See also