.NET Web后台动态加载Css、JS 文件，换肤方案

时间：2022-09-04 20:42:38

后台动态加载文件代码：

  //假设css文件：TestCss.css

        #region 动态加载css文件

        public void AddCss()

        {

            HtmlGenericControl _CssFile = new HtmlGenericControl("link");

            _CssFile.ID = "CssFile";

            _CssFile.Attributes["rel"] = "stylesheet";

            _CssFile.Attributes["type"] = "text/css";

            _CssFile.Attributes["href"] = "/Styles/TestCss.css";

            if (this.FindControl(_CssFile.ID) == null)

            {

                this.Page.Header.Controls.Add(_CssFile);

            }

        }

        #endregion 动态加载css文件

换肤方案

1) 写个类（Page_Parent.cs） 动态加载样式文件

2) 所有页面继承Page_Parent.cs类

Page_Parent.cs类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI.HtmlControls;

namespace Test

{

    public class Page_Parent: System.Web.UI.Page

    {

      public Page_Parent()

        {

            this.Load += Page_Parent_Load;

            this.Error += Page_Parent_Error;

        }

        /// <summary>

        /// 捕捉未处理的页面错误

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Page_Parent_Error(object sender, EventArgs e)

        {

            throw new NotImplementedException();

        }

        private void Page_Parent_Load(object sender, EventArgs e)

        {

            AddCss();

        }

        //假设css文件：TestCss.css

        #region 动态加载css文件

        public void AddCss()

        {

            HtmlGenericControl _CssFile = new HtmlGenericControl("link");

            _CssFile.ID = "CssFile";

            _CssFile.Attributes["rel"] = "stylesheet";

            _CssFile.Attributes["type"] = "text/css";

            _CssFile.Attributes["href"] = "/Styles/TestCss.css";

            if (this.FindControl(_CssFile.ID) == null)

            {

                this.Page.Header.Controls.Add(_CssFile);

            }

        }

        #endregion 动态加载css文件

    }

}

测试页面Web_Test.aspx：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Web_Test.aspx.cs" Inherits="Web.Web_Test" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

    <p>1232131</p>

    </div>

    </form>

</body>

</html>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace Web

{

    public partial class Web_Test : Page_Parent

    {

        protected void Page_Load(object sender, EventArgs e)

        {

        }

    }

}

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