在 ASP.NET MVC 中使用 HtmlTextWriter

发布于 2024-09-13 05:59:06 字数 711 浏览 23 评论 0原文

我正在迁移一些旧代码，其中广泛使用 HtmlTextWriter 来呈现 UI 元素。

我正在迁移代码以使用 ASP.NET MVC 1.0。据我所知，我没有使用任何 HtmlTextWriter 特定功能（例如缩进）。

目前，我正在使用包装方法返回由 HtmlTextWriter 生成的字符串，如下所示：

var sw = new StringWriter();
var xhtmlTextWriter = new XhtmlTextWriter(sw);
GenerateHtml(xhtmlTextWriter);
return sw.ToString();

我的问题是：

我正在尝试从 ASP.NET 获取 HtmlTextWriter 实例MVC View，但显然连 HtmlHelper 也不使用它。我错过了什么吗？
每次调用 GenerateHtml 都会生成小的 HTML 片段，通常不超过 1000 个字符，但可能会有很多调用。是否值得将 HtmlTextWriter 依赖代码重写为 StringBuilder？或者，创建一个 HtmlTextWriter 实例，该实例将在所有调用中使用（并在迭代结束时刷新）。

原文

I am migrating some old code where HtmlTextWriter is used extensively to render UI elements.

I am migrating the code to use ASP.NET MVC 1.0. As far as I am aware, I am not using any of the HtmlTextWriter specific function (such as indentation).

Currently, I am using a wrapper method to return string generated by the HtmlTextWriter as follow:

var sw = new StringWriter();
var xhtmlTextWriter = new XhtmlTextWriter(sw);
GenerateHtml(xhtmlTextWriter);
return sw.ToString();

My questions are:

I am trying to get HtmlTextWriter instance from ASP.NET MVC View, but apparently even the HtmlHelper does not use this. Do I miss anything?
Each call to GenerateHtml will generated small HTML pieces, generally not bigger than 1000 characters, but there can be a lot of calls. Is it worth rewriting the HtmlTextWriter dependent code into StringBuilder? Or instead, what about creating a HtmlTextWriter instance which will be used on all calls (and flushed at the end of the iterations).

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椵侞 2024-09-20 05:59:06

我认为使用 helper.ViewContext.writer 会起作用，而不是创建 StringBuider 和 StringWriter 。

那么上面的示例代码将是：

var calendar = new DayPilotCalendar();
if( model != null )
   {
   model.CopyTo( calendar );
   }
if( options != null )
   {
   options.CopyTo( calendar );
   }

HtmlTextWriter writer = new HtmlTextWriter( helper.ViewContext.Writer );

writer.AddAttribute( HtmlTextWriterAttribute.Class, "dayPilot" );
writer.RenderBeginTag( HtmlTextWriterTag.Div );
calendar.RenderControl( writer );
writer.RenderEndTag();  // Close DIV

return( null );         // Don't need to return anything.

免责声明：到目前为止，我只尝试使用 helper.ViewContext.Writer 来生成

。列表。效果很好。还没有尝试过它来渲染控件。

Instead of creating a StringBuider and StringWriter I think using the helper.ViewContext.writer will work.

Then the above sample code would be:

var calendar = new DayPilotCalendar();
if( model != null )
   {
   model.CopyTo( calendar );
   }
if( options != null )
   {
   options.CopyTo( calendar );
   }

HtmlTextWriter writer = new HtmlTextWriter( helper.ViewContext.Writer );

writer.AddAttribute( HtmlTextWriterAttribute.Class, "dayPilot" );
writer.RenderBeginTag( HtmlTextWriterTag.Div );
calendar.RenderControl( writer );
writer.RenderEndTag();  // Close DIV

return( null );         // Don't need to return anything.

Disclaimer: So far I've only tried using the helper.ViewContext.Writer to produce a <UL> list. It worked fine. Haven't tried it to render controls.

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李白 2024-09-20 05:59:06

我这里有一个演示应用程序，它展示了如何在一个 MVC 应用程序。

这是该帖子中的代码示例。

    public static string DayPilot(
        this HtmlHelper helper,
        DayPilotData model,
        DayPilotViewOptions options)
    {
        var calendar = new DayPilotCalendar();
        if (model != null)
        {
            model.CopyTo(calendar);
        }
        if (options != null)
        {
            options.CopyTo(calendar);
        }
        var sb = new System.Text.StringBuilder();
        sb.Append("<div class=\"dayPilot\">"); // allows working around td cellpadding bug in css
        using (var sw = new System.IO.StringWriter(sb))
        {
            using (var tw = new HtmlTextWriter(sw))
            {
                calendar.RenderControl(tw);
            }
        }
        sb.Append("</div>");
        return sb.ToString();
    }

关于#2，如果它没有坏的话......

I have a demo app here which shows how to do this in an MVC app.

Here's a code sample, from that post.

    public static string DayPilot(
        this HtmlHelper helper,
        DayPilotData model,
        DayPilotViewOptions options)
    {
        var calendar = new DayPilotCalendar();
        if (model != null)
        {
            model.CopyTo(calendar);
        }
        if (options != null)
        {
            options.CopyTo(calendar);
        }
        var sb = new System.Text.StringBuilder();
        sb.Append("<div class=\"dayPilot\">"); // allows working around td cellpadding bug in css
        using (var sw = new System.IO.StringWriter(sb))
        {
            using (var tw = new HtmlTextWriter(sw))
            {
                calendar.RenderControl(tw);
            }
        }
        sb.Append("</div>");
        return sb.ToString();
    }

Regarding #2, if it ain't broke...

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