创建html元素并转化成字符串方法，用于快速构建html元素,填入Literal,避免使用服务器控件提高页面性能

 

using System;
using System.Web;
using System.Collections;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.IO;

/// <summary>
/// 搜集编写者losingrose
/// QQ:303864496
/// MSN:losingrose@21cn.com
/// http://losingrose.cnblogs.com
/// </summary>
public static class MyControlAS
{
    /// <summary>
    /// 设置DropDownList的选项
    /// </summary>
    /// <param name="droplist">DropDownList</param>
    public static void DropDownList_addall(System.Web.UI.WebControls.DropDownList droplist)
    {
        droplist.Items.Insert(0, new System.Web.UI.WebControls.ListItem("所有", "%"));
    }
    #region HtmlHelper
    public static string htmlControlToString(Control control)
    {
        StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
        control.RenderControl(htw);
        return sw.ToString();
    }
    public static HtmlAnchor NewAnchor(string text, string href, string classname, string title,string target)
    {
        HtmlAnchor a = new HtmlAnchor();
        a.InnerText = text;
        a.HRef = href;
        if (!string.IsNullOrEmpty(classname))
            a.Attributes["class"] = classname;
        if (!string.IsNullOrEmpty(title))
            a.Title = title;
        if (!string.IsNullOrEmpty(target))
            a.Target = target;
        return a;
    }
    public static string NewAnchorString(string text, string href, string classname, string title, string target)
    {
        return htmlControlToString(NewAnchor(text, href, classname, title, target));
    }
    public static HtmlAnchor NewAnchor_blank(string text, string href, string classname, string title)
    {
        HtmlAnchor a = new HtmlAnchor();
        a.InnerText = text;
        a.HRef = href;
        if (!string.IsNullOrEmpty(classname))
            a.Attributes["class"] = classname;
        if (!string.IsNullOrEmpty(title))
            a.Title = title;
        a.Target = "_blank";
        return a;
    }
    public static string NewAnchor_blankString(string text, string href, string classname, string title)
    {
        return htmlControlToString(NewAnchor_blank(text, href, classname, title));
    }
    public static HtmlAnchor NewAnchor(string[] prams)
    {
        if (prams.Length % 2 != 0)
            throw new Exception("参数数目不为偶数");
        HtmlAnchor a = new HtmlAnchor();
        for (int i = 0; i < prams.Length; i++)
        {
            a.Attributes[prams[i]] = prams[++i];
        }
        return a;
    }
    public static string NewAnchorString(string[] prams)
    {
        return htmlControlToString(NewAnchor(prams));
    }
    public static HtmlImage NewImage(string src, string classname, string alt)
    {
        HtmlImage img = new HtmlImage();
        img.Src = src;
        img.Attributes["class"] = classname;
        img.Alt = alt;
        return img;
    }
    public static string NewImageString(string src, string classname, string alt)
    {
        return htmlControlToString(NewImage(src, classname, alt));
    }
    public static HtmlImage NewImage(string[] prams)
    {
        if (prams.Length % 2 != 0)
            throw new Exception("参数数目不为偶数");
        HtmlImage img = new HtmlImage();
        for (int i = 0; i < prams.Length; i++)
        {
            img.Attributes[prams[i]] = prams[++i];
        }
        return img;
    }
    public static string NewImageString(string[] prams)
    {
        return htmlControlToString(NewImage(prams));
    }
    #endregion
}