如何在asp.net中实现嵌入式自定义标签？ [英] How to achieve embedded custom tags in asp.net?

问题描述

我找到了这个示例：

<telerik:RadDatePicker
 ID="RadDatePicker1"
 runat="server">
 <DateInput Width="100%"></DateInput>
 <Calendar
     CellAlign="Center"
     CellVAlign="Middle"
     DayNameFormat="FirstLetter"
     FirstDayOfWeek="Default"
     MonthLayout="Layout_7columns_x_6rows"
     Orientation="RenderInRows"
     TitleAlign="Center"
     UseColumnHeadersAsSelectors="False"
     ShowRowHeaders="False">
</Calendar>
<DatePopupButton 
     CssClass="radPopupImage_Default" 
     BorderColor="#D0E1F2" 
     BorderStyle="Solid" 
     BorderWidth="1px" />

我的假设是RadDatePicker有一个DateInput对象，Calendar对象和DatePopupButton对象。

My assumption is that inside the RadDatePicker there is a DateInput object, Calendar Object and DatePopupButton object.

我想拥有自己的自定义控件，该控件允许访问内部对象，例如

I would like to have my own custom control that allows access to an inner object e.g.

    <jonno:textbox id="txt1" runat="server"><FieldConfig fieldName="Input1"/></jonno:textbox>

理想情况下，我不希望FieldConfig类成为可视类，但是可以。

Ideally I don't want the FieldConfig class to be a visual class but it's ok if it is.

如何实现？

推荐答案

嵌入式自定义标签是控件的属性。要启用在标记中设置它们，您需要使用以下属性装饰控件和属性：

The embedded custom tags are properties of your control. To enable setting them in markup, you need to decorate your control and properties with the following attributes:

• 控件：ParseChilden，PersistChildren


• 属性：PersistenceMode

我使用的控件示例执行类似的操作：

Example from a control I use that does something similar:

/// <summary>
/// Control that will conditionally show one of two views
/// </summary>
[ParseChildren(true)]
[PersistChildren(true)]
public class EditingView : CompositeControl
{
    #region private fields

    private View _displayView = new View();
    private View _editView = new View();

    #endregion
    #region properties

    /// <summary>
    /// The view that will be rendered in display mode
    /// </summary>
    [PersistenceMode(PersistenceMode.InnerProperty)]
    public View DisplayView
    {
        get
        {
            return _displayView;
        }
        set
        {
            _displayView = value;
        }
    }

    /// <summary>
    /// The view that will be rendered in editing mode
    /// </summary>
    [PersistenceMode(PersistenceMode.InnerProperty)]
    public View EditView
    {
        get
        {
            return _editView;
        }
        set
        {
            _editView = value;
        }
    }
    /* Implementation details hidden */
}

在msdn上查找属性，以准确了解它们的作用。上面应该做你需要做的事情。
在标记中，我可以简单地分配两个视图：

Look the attributes up on msdn to read up on what they do exactly. The above should do what you need it to do though. In markup I can then simply assign the two views:

<ctl:EditingView runat="server">
<DisplayView>
    blah blah
</DisplayView>
<EditView>
    blah blah edit
</EditView>
</ctl:EditingView>

唯一的区别是我的属性仍然是WebControls，并带有更多的子控件。不过，只要您正确设置属性就没关系。

THe only difference is that my properties are still WebControls and take more child controls. It shouldn´t matter though, as long as you set your attributes right.

Menno

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