作为的ViewState属性 [英] ViewState as Attribute

问题描述

而不是这个..

    public string Text
    {

        get { return ViewState["Text"] as string; }

        set { ViewState["Text"] = value; }

    }

我想这个..

    [ViewState]
    public String Text { get; set; }

能不能做到？

推荐答案

这样的：

public class BasePage: Page {

    protected override Object SaveViewState() {

        object baseState                      = base.SaveViewState();            
        IDictionary<string, object> pageState = new Dictionary<string, object>();
        pageState.Add("base", baseState);

        // Use reflection to iterate attributed properties, add 
        // each to pageState with the property name as the key

        return pageState;
    }

    protected override void LoadViewState(Object savedState) {

        if (savedState != null) {

            var pageState = (IDictionary<string, object>)savedState;

            if (pageState.Contains("base")) {
                base.LoadViewState(pageState["base"]);
            }

            // Iterate attributed properties. If pageState contains an
            // item with the appropriate key, set the property value.

        }
    }
}

这是从该类继承可以使用你已经提出了属性驱动的语法页面。

Pages that inherit from this class could use the attribute-driven syntax you've proposed.

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