在ASP.NET中我们经常需要输出一些JS脚本,比如弹出一个警告窗口,返回到历史页面等JS功能,我看到网上流传得比较广的是马先光写的一个JScript类,这个类基本将经常用到的JS脚本包含了,非常方便,唯一的不足是作者采用的Response.Write(string msg)的办法,这样造成输出的js脚本在<html></html>标签之外,破坏了原有XHTML的结构,所以本人在满足原功能的情况下,对JScript类做了进一步的改善,这个改善采用了重载的办法,增加了一个System.Web.UI.Page类的实例作为参数,不会影响原来的程序代码。
 
整个程序的代码如下:
using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Web.UI;

/// <summary>
/// 一些常用的Js调用
/// 添加新版说明:由于旧版普遍采用Response.Write(string msg)的方式输出js脚本,这种
/// 方式输出的js脚本会在html元素的&lt;html&gt;&lt;/html&gt;标签之外,破坏了整个xhtml的结构,
/// 而新版本则采用ClientScript.RegisterStartupScript(string msg)的方式输出,不会改变xhtml的结构,
/// 不会影响执行效果。
/// 为了向下兼容,所以新版本采用了重载的方式,新版本中要求一个System.Web.UI.Page类的实例。
/// 创建时间:2006-9-13
/// 创建者:马先光
/// 新版作者:周公
/// 修改日期:2007-4-17
/// 修改版发布网址:http://blog.csdn.net/zhoufoxcn
/// </summary>
public class JScript
{
    
#region 旧版本
    
/// <summary>
    
/// 弹出JavaScript小窗口
    
/// </summary>
    
/// <param name="js">窗口信息</param>
    public static void Alert(string message)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    alert('
" + message + "');</Script>";
        HttpContext.Current.Response.Write(js);
        
#endregion
    }

    
/// <summary>
    
/// 弹出消息框并且转向到新的URL
    
/// </summary>
    
/// <param name="message">消息内容</param>
    
/// <param name="toURL">连接地址</param>
    public static void AlertAndRedirect(string message, string toURL)
    {
        
#region
        
string js = "<script language=javascript>alert('{0}');window.location.replace('{1}')</script>";
        HttpContext.Current.Response.Write(
string.Format(js, message, toURL));
        
#endregion
    }

    
/// <summary>
    
/// 回到历史页面
    
/// </summary>
    
/// <param name="value">-1/1</param>
    public static void GoHistory(int value)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    history.go({0});  
                  </Script>
";
        HttpContext.Current.Response.Write(
string.Format(js, value));
        
#endregion
    }

    
/// <summary>
    
/// 关闭当前窗口
    
/// </summary>
    public static void CloseWindow()
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    parent.opener=null;window.close();  
                  </Script>
";
        HttpContext.Current.Response.Write(js);
        HttpContext.Current.Response.End();
        
#endregion
    }

    
/// <summary>
    
/// 刷新父窗口
    
/// </summary>
    public static void RefreshParent(string url)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    window.opener.location.href='
" + url + "';window.close();</Script>";
        HttpContext.Current.Response.Write(js);
        
#endregion
    }


    
/// <summary>
    
/// 刷新打开窗口
    
/// </summary>
    public static void RefreshOpener()
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    opener.location.reload();
                  </Script>
";
        HttpContext.Current.Response.Write(js);
        
#endregion
    }


    
/// <summary>
    
/// 打开指定大小的新窗体
    
/// </summary>
    
/// <param name="url">地址</param>
    
/// <param name="width"></param>
    
/// <param name="heigth"></param>
    
/// <param name="top">头位置</param>
    
/// <param name="left">左位置</param>
    public static void OpenWebFormSize(string url, int width, int heigth, int top, int left)
    {
        
#region
        
string js = @"<Script language='JavaScript'>window.open('" + url + @"','','height=" + heigth + ",width=" + width + ",top=" + top + ",left=" + left + ",location=no,menubar=no,resizable=yes,scrollbars=yes,status=yes,titlebar=no,toolbar=no,directories=no');</Script>";

        HttpContext.Current.Response.Write(js);
        
#endregion
    }


    
/// <summary>
    
/// 转向Url制定的页面
    
/// </summary>
    
/// <param name="url">连接地址</param>
    public static void JavaScriptLocationHref(string url)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    window.location.replace('{0}');
                  </Script>
";
        js 
= string.Format(js, url);
        HttpContext.Current.Response.Write(js);
        
#endregion
    }

    
/// <summary>
    
/// 打开指定大小位置的模式对话框
    
/// </summary>
    
/// <param name="webFormUrl">连接地址</param>
    
/// <param name="width"></param>
    
/// <param name="height"></param>
    
/// <param name="top">距离上位置</param>
    
/// <param name="left">距离左位置</param>
    public static void ShowModalDialogWindow(string webFormUrl, int width, int height, int top, int left)
    {
        
#region
        
string features = "dialogWidth:" + width.ToString() + "px"
            
+ ";dialogHeight:" + height.ToString() + "px"
            
+ ";dialogLeft:" + left.ToString() + "px"
            
+ ";dialogTop:" + top.ToString() + "px"
            
+ ";center:yes;help=no;resizable:no;status:no;scroll=yes";
        ShowModalDialogWindow(webFormUrl, features);
        
#endregion
    }
    
/// <summary>
    
/// 弹出模态窗口
    
/// </summary>
    
/// <param name="webFormUrl"></param>
    
/// <param name="features"></param>
    public static void ShowModalDialogWindow(string webFormUrl, string features)
    {
        
string js = ShowModalDialogJavascript(webFormUrl, features);
        HttpContext.Current.Response.Write(js);
    }
    
/// <summary>
    
/// 弹出模态窗口
    
/// </summary>
    
/// <param name="webFormUrl"></param>
    
/// <param name="features"></param>
    
/// <returns></returns>
    public static string ShowModalDialogJavascript(string webFormUrl, string features)
    {
        
#region
        
string js = @"<script language=javascript>                            
                            showModalDialog('
" + webFormUrl + "','','" + features + "');</script>";
        
return js;
        
#endregion
    }
    
#endregion

    
#region 新版本
    
/// <summary>
    
/// 弹出JavaScript小窗口
    
/// </summary>
    
/// <param name="js">窗口信息</param>
    public static void Alert(string message, Page page)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    alert('
" + message + "');</Script>";
        
//HttpContext.Current.Response.Write(js);
        if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "alert"))
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), 
"alert", js);
        }
        
#endregion
    }

    
/// <summary>
    
/// 弹出消息框并且转向到新的URL
    
/// </summary>
    
/// <param name="message">消息内容</param>
    
/// <param name="toURL">连接地址</param>
    public static void AlertAndRedirect(string message, string toURL, Page page)
    {
        
#region
        
string js = "<script language=javascript>alert('{0}');window.location.replace('{1}')</script>";
        
//HttpContext.Current.Response.Write(string.Format(js, message, toURL));
        if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "AlertAndRedirect"))
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), 
"AlertAndRedirect"string.Format(js, message, toURL));
        }
        
#endregion
    }

    
/// <summary>
    
/// 回到历史页面
    
/// </summary>
    
/// <param name="value">-1/1</param>
    public static void GoHistory(int value, Page page)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    history.go({0});  
                  </Script>
";
        
//HttpContext.Current.Response.Write(string.Format(js, value));
        if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "GoHistory"))
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), 
"GoHistory"string.Format(js, value));
        }
        
#endregion
    }

    
//        /// <summary>
    
//        /// 关闭当前窗口
    
//        /// </summary>
    
//        public static void CloseWindow()
    
//        {
    
//            #region
    
//            string js = @"<Script language='JavaScript'>
    
//                    parent.opener=null;window.close();  
    
//                  </Script>";
    
//            HttpContext.Current.Response.Write(js);
    
//            HttpContext.Current.Response.End();
    
//            #endregion
    
//        }

    
/// <summary>
    
/// 刷新父窗口
    
/// </summary>
    public static void RefreshParent(string url, Page page)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    window.opener.location.href='
" + url + "';window.close();</Script>";
        
//HttpContext.Current.Response.Write(js);
        if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "RefreshParent"))
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), 
"RefreshParent", js);
        }
        
#endregion
    }


    
/// <summary>
    
/// 刷新打开窗口
    
/// </summary>
    public static void RefreshOpener(Page page)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    opener.location.reload();
                  </Script>
";
        
//HttpContext.Current.Response.Write(js);
        if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "RefreshOpener"))
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), 
"RefreshOpener", js);
        }
        
#endregion
    }


    
/// <summary>
    
/// 打开指定大小的新窗体
    
/// </summary>
    
/// <param name="url">地址</param>
    
/// <param name="width"></param>
    
/// <param name="heigth"></param>
    
/// <param name="top">头位置</param>
    
/// <param name="left">左位置</param>
    public static void OpenWebFormSize(string url, int width, int heigth, int top, int left, Page page)
    {
        
#region
        
string js = @"<Script language='JavaScript'>window.open('" + url + @"','','height=" + heigth + ",width=" + width + ",top=" + top + ",left=" + left + ",location=no,menubar=no,resizable=yes,scrollbars=yes,status=yes,titlebar=no,toolbar=no,directories=no');</Script>";
        
//HttpContext.Current.Response.Write(js);
        if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "OpenWebFormSize"))
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), 
"OpenWebFormSize", js);
        }
        
#endregion
    }


    
/// <summary>
    
/// 转向Url制定的页面
    
/// </summary>
    
/// <param name="url">连接地址</param>
    public static void JavaScriptLocationHref(string url, Page page)
    {
        
#region
        
string js = @"<Script language='JavaScript'>
                    window.location.replace('{0}');
                  </Script>
";
        js 
= string.Format(js, url);
        
//HttpContext.Current.Response.Write(js);
        if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "JavaScriptLocationHref"))
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), 
"JavaScriptLocationHref", js);
        }
        
#endregion
    }

    
/// <summary>
    
/// 打开指定大小位置的模式对话框
    
/// </summary>
    
/// <param name="webFormUrl">连接地址</param>
    
/// <param name="width"></param>
    
/// <param name="height"></param>
    
/// <param name="top">距离上位置</param>
    
/// <param name="left">距离左位置</param>
    public static void ShowModalDialogWindow(string webFormUrl, int width, int height, int top, int left, Page page)
    {
        
#region
        
string features = "dialogWidth:" + width.ToString() + "px"
            
+ ";dialogHeight:" + height.ToString() + "px"
            
+ ";dialogLeft:" + left.ToString() + "px"
            
+ ";dialogTop:" + top.ToString() + "px"
            
+ ";center:yes;help=no;resizable:no;status:no;scroll=yes";
        ShowModalDialogWindow(webFormUrl, features, page);
        
#endregion
    }
    
/// <summary>
    
/// 弹出模态窗口
    
/// </summary>
    
/// <param name="webFormUrl"></param>
    
/// <param name="features"></param>
    public static void ShowModalDialogWindow(string webFormUrl, string features, Page page)
    {
        
string js = ShowModalDialogJavascript(webFormUrl, features);
        
//HttpContext.Current.Response.Write(js);
        if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "ShowModalDialogWindow"))
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), 
"ShowModalDialogWindow", js);
        }
    }
    
//        /// <summary>
    
//        /// 弹出模态窗口
    
//        /// </summary>
    
//        /// <param name="webFormUrl"></param>
    
//        /// <param name="features"></param>
    
//        /// <returns></returns>
    
//        public static string ShowModalDialogJavascript(string webFormUrl, string features)
    
//        {
    
//            #region
    
//            string js = @"<script language=javascript>                            
    
//    showModalDialog('" + webFormUrl + "','','" + features + "');</script>";
    
//            return js;
    
//            #endregion
    
//        }
    #endregion
}