三种方法让Response.Redirect在新窗口打开
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2024-02-27 22:08:15
response.rederect在默认情况下是在本页跳转,所以除了在js中用window.open或是给a标签添加target属性之外,在后台似乎不能来打开新的页面,其实...
response.rederect在默认情况下是在本页跳转,所以除了在js中用window.open或是给a标签添加target属性之外,在后台似乎不能来打开新的页面,其实不然,通过设置form的target属性同样可以让response.rederect所指向的url在新的窗口打开。下面用三种方法来实现。
1 .给form指定target属性,那么本页面中所有的response.rederect都将在新的窗口中打开。代码如下:
复制代码 代码如下:
protected void page_load(object sender, eventargs e)
{
form1.target = "_blank";
}
或
<form id="form2" runat="server" target="_blank">
2 .用脚本针对某个控件来指定form的target,代码如下:
html代码:
复制代码 代码如下:
<%@ page language="c#" autoeventwireup="true" codebehind="default.aspx.cs" inherits="responseredirectdemo._default" %>
<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="head1" runat="server">
<title>responseredirectdemo</title>
</head>
<body>
<form id="form2" runat="server" target="_blank">
<div>
<asp:button id="button1" runat="server" onclick="button1_click"
text="opennewwindow"/>
<asp:button id="button2" runat="server" onclick="button2_click"
text="openoldwindow" />
</div>
</form>
</body>
</html>
c#代码:
[code]
namespace responseredirectdemo
{
public partial class _default : system.web.ui.page
{
protected void page_load(object sender, eventargs e)
{
button1.attributes.add("onclick", "this.form.target='_blank'");
button2.attributes.add("onclick", "this.form.target=''");
}
protected void button1_click(object sender, eventargs e)
{
response.redirect("http://oec2003.cnblogs.com");
}
protected void button2_click(object sender, eventargs e)
{
response.redirect("http://oec2003.cnblogs.com");
}
}
}
上面的代码中点击button1在新窗口打开,点击button2在本页打开。
3 .除了设置form的target属性,要在新的窗口打开页面就只能用open,可以写个通用的方法来实现,如下:
复制代码 代码如下:
public class redirecthelper
{
public static void redirect(string url,
string target, string windowfeatures)
{
httpcontext context = httpcontext.current;
if ((string.isnullorempty(target) ||
target.equals("_self", stringcomparison.ordinalignorecase)) &&
string.isnullorempty(windowfeatures))
{
context.response.redirect(url);
}
else
{
page page = (page)context.handler;
if (page == null)
{
throw new
invalidoperationexception("cannot redirect to new window.");
}
url = page.resolveclienturl(url);
string script;
if (!string.isnullorempty(windowfeatures))
{
script = @"window.open(""{0}"", ""{1}"", ""{2}"");";
}
else
{
script = @"window.open(""{0}"", ""{1}"");";
}
script = string.format(script, url, target, windowfeatures);
page.clientscript.registerstartupscript(page.gettype(),
"redirect", script, true);
} } }
这样就可以在程序中使用redirecthelper.redirect("oec2003.aspx", "_blank", "");第三个参数为open窗口的一些属性。但这样好像还不是很方便,在.net3.5中提供了扩展方法的特性,在这里也可以借用一下,将上面的静态方法实现为response.redirect的一个重载。具体代码如下:
复制代码 代码如下:
public static class redirecthelper
{
public static void redirect(this httpresponse response,
string url, string target, string windowfeatures)
{
if ((string.isnullorempty(target) ||
target.equals("_self", stringcomparison.ordinalignorecase)) &&
string.isnullorempty(windowfeatures))
{
response.redirect(url);
}
else
{
page page = (page)httpcontext.current.handler; if (page == null)
{
throw new
invalidoperationexception("cannot redirect to new window .");
}
url = page.resolveclienturl(url);
string script;
if (!string.isnullorempty(windowfeatures))
{
script = @"window.open(""{0}"", ""{1}"", ""{2}"");";
}
else
{
script = @"window.open(""{0}"", ""{1}"");";
}
script = string.format(script, url, target, windowfeatures);
scriptmanager.registerstartupscript(page,
typeof(page), "redirect", script, true);
}
}
}
将该类添加到项目中后,在程序中输入response.redirect会发现该方法有三个重载了,这样再结合前面的form的target 就非常方便了。
另外:
respose.write("<script language='javascript'>window.open('"+ url +"');</script>"); (打开简洁窗口):
respose.write("<script language='javascript'>window.open('" + url + "','','resizable=1,scrollbars=0,status=1,menubar=no,toolbar=no,location=no, menu=no');</script>");
1. response.redirect("xxx.aspx",true)——直接转向新的页面,原窗口被代替;
2. response.write("<script>window.open('xxx.aspx','_blank')</script>")——原窗口保留,另外新增一个新页面;
3. response.write("<script>window.location='xxx.aspx'</script>")——打开新的页面,原窗口被代替;
4. server.transfer("xxx.aspx")——打开新的页面;
5. response.write("<script>window.showmodelessdialog('xxx.aspx')</script>")——原窗口保留,以对话框形式打开新窗口;
6. response.write("<script>window.showmodeldialog('xxx.aspx')</script>")——对话框形式打开新窗口,原窗口被代替;
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