C#在MVC框架中使用后台生成Html模板控件

1.在ASP.Net MVC开发WEB中经常下拉列表，其实我们可以配置到后台调用可以自定义@Html 控件来使用

    使用 MvcHtmlString 来构造后来下拉相关控件 (这里我是 使用 Select2 来创建下拉)

using DataFactory;
using EntityFactory;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;

namespace TEST.Areas.Common.Extend.HtmlExtend
{
    public class HtmlControl
    {

          public static MvcHtmlString Select2BusinessArea(this HtmlHelper helper, string dataKey, string verify = "", bool multiple = false)
        {
            // Create tag builder
            StringBuilder html = new StringBuilder();
            html.Append("<select class=\"form-control select2\" data-key=\"" + dataKey + "\" data-verify=\"" + verify + "\"" + (multiple ? " multiple" : "") + ">");
            html.Append("<option value=\"\">请选择...</option>");
            for (int i = 0; i < BusinessAreas.Count; i++)
            {
                html.Append(string.Format("<option value=\"{0}\">{1}</option>", BusinessAreas[i].BusinessAreaId, BusinessAreas[i].AreaName));
            }
            html.Append("</select>");
            // Render tag
            return MvcHtmlString.Create(html.ToString());
        }

    }
}

2.前端调用

<tr>
                            <td>
                                下拉插件:
                            </td>
                            <td colspan="3">
                                @TEST.Areas.Common.Extend.HtmlExtend.HtmlControl.Select2BusinessArea("相关参数")
                            </td>
                        </tr>