上篇文章深入的学习了HtmlTextWriter，这篇文章我来讲讲HtmlTextWriter的三个最佳拍档。HtmlTextWriterTag，HtmlTextWriterAttribute，HtmlTextWriterStyle.

1.HtmlTextWriterTag用来表示HTML标签,使用HtmlTextWriter与HtmlTextWriterTag我们可以很方便定义html，下面我们创建一个div

    StringWriter sw = new System.IO.StringWriter();
    HtmlTextWriter writer = new HtmlTextWriter(sw);
    writer.RenderBeginTag(HtmlTextWriterTag.Div);     //<div>
    writer.RenderEndTag();                            //</div>
    pre1.InnerText = sw.ToString();

        StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter writer = new HtmlTextWriter(sw);
        writer.AddAttribute(HtmlTextWriterAttribute.Width,"100px");
        writer.AddAttribute(HtmlTextWriterAttribute.Height, "100px");
        writer.RenderBeginTag(HtmlTextWriterTag.Img);     //<div>
        writer.RenderEndTag();                            //</div>
        pre1.InnerText = sw.ToString();
        Response.Write(sw.ToString());

    StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter writer = new HtmlTextWriter(sw);
        writer.AddAttribute("Width","100px");
        writer.AddAttribute("Height", "100px");
        writer.RenderBeginTag(HtmlTextWriterTag.Img);     //<div>
        writer.RenderEndTag();                            //</div>
        pre1.InnerText = sw.ToString();
        Response.Write(sw.ToString());

3.HtmlTextWriterStyle用来表示样式：要先定义样式属性再定义标签

        StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter writer = new HtmlTextWriter(sw);
        writer.AddStyleAttribute(HtmlTextWriterStyle.Width,"100px");
        writer.AddStyleAttribute(HtmlTextWriterStyle.Height, "100px");
        writer.AddStyleAttribute(HtmlTextWriterStyle.BackgroundColor, "red");
        writer.RenderBeginTag(HtmlTextWriterTag.Div);     //<div>
        writer.RenderEndTag();                            //</div>
        pre1.InnerText = sw.ToString();
        Response.Write(sw.ToString());

        StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter writer = new HtmlTextWriter(sw);
        writer.AddStyleAttribute("width","100px");
        writer.AddStyleAttribute("Height", "100px");
        writer.AddStyleAttribute("background-color", "red");
        writer.RenderBeginTag(HtmlTextWriterTag.Div);     //<div>
        writer.RenderEndTag();                            //</div>
        pre1.InnerText = sw.ToString();
        Response.Write(sw.ToString());

下面展示一个综合实例：

        StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter writer = new HtmlTextWriter(sw);
        //最外出DIV的样式属性
        writer.AddStyleAttribute(HtmlTextWriterStyle.TextAlign,"center");
        writer.AddStyleAttribute(HtmlTextWriterStyle.Width, "194px");
        writer.AddStyleAttribute(HtmlTextWriterStyle.Height, "194px");
        writer.AddStyleAttribute("background", "url(images/background.gif) no-repeat left");

        //最外层的Div开始
        writer.RenderBeginTag(HtmlTextWriterTag.Div);

        //Img标签的属性和样式属性
        writer.AddAttribute(HtmlTextWriterAttribute.Src,"images/nature.jpg");
        writer.AddAttribute(HtmlTextWriterAttribute.Width,"160");
        writer.AddAttribute(HtmlTextWriterAttribute.Height, "160");
        writer.AddStyleAttribute(HtmlTextWriterStyle.BorderStyle, "none");
        writer.AddStyleAttribute(HtmlTextWriterStyle.Padding, "0px");
        writer.AddStyleAttribute(HtmlTextWriterStyle.MarginTop, "16px");

        //生成Img标签
        writer.RenderBeginTag(HtmlTextWriterTag.Img);
        writer.RenderEndTag();

        //结束最外层Div
        writer.RenderEndTag();
        pre1.InnerText = sw.ToString();
        Response.Write(sw.ToString());

显示结果