如何使用ASP.NET MVC创建模板化控件?

public void Render()
{
    Response.Write(getContentTemplateHandler());
}

事实证明, Telerik MVC extensions are open-source and available at CodePlex 所以我快速查看了源代码。

它们从HTMLHelper实例的ViewContext创建一个HTMLTextWriter。当他们写的时候,它会写到页面上。

代码变为:

// Extend the HtmlHelper
public static PanelWithHeaderControl PanelWithHeader(this HtmlHelper helper)
{
    HtmlTextWriter writer = helper.ViewContext.HttpContext.Request.Browser.CreateHtmlTextWriter(helper.ViewContext.HttpContext.Response.Output);

    return new PanelWithHeaderControl(writer);
}

public class PanelWithHeaderControl
{
    private HtmlTextWriter writer;

    private string headerTitle;

    private Action getContentTemplateHandler;

    public PanelWithHeaderControl(HtmlTextWriter writer)
    {
        this.writer = writer;
    }

    public PanelWithHeaderControl HeaderTitle(string headerTitle)
    {
        this.headerTitle = headerTitle;

        return this;
    }

    public PanelWithHeaderControl Content(Action getContentTemplateHandler)
    {
        this.getContentTemplateHandler = getContentTemplateHandler;

        return this;
    }

    public void Render()
    {
        writer.Write("<div class=\"panel-with-header\"><div class=\"header\">" + headerTitle + "</div><div class=\"content-template\">");

        getContentTemplateHandler();

        writer.Write("</div></div>");
    }
}

*我知道,密码一团糟

你可能想做点什么 Html.BeginPanel() / Html.EndPanel() ,类似于窗体的创建方式 Html.BeginForm() / Html.EndForm() . 这样就可以包装包含的内容,而不需要将其作为参数传递。