//使用方法：建一个基页面，将下列函数复制过去，其它所有页面从基页面继承，在派生页面中按钮事件中就可以调用下面的函数
//在弹出窗口的aspx中<head></head>间加入以下代码：<base target="_self"> //弹出一个模式窗口 //url:弹出窗体地址 //弹出窗体宽度 //height:弹出窗本高度 //allowStatus:是否显示状态条 //allowScroll:是否显示滚动条 //refreshParent:返回时是否刷新父窗体 //refreshButtonID:保留不用,即为空字符串 public void CspOpenWindowModal (string url, int width, int height,string allowStatus,string allowScroll,bool refreshParent,string refreshButtonID) 
{ 
string options="'dialogWidth="+width+"px;dialogHeight ="+height+"px;"+ "help=no;status="+allowStatus+";scroll="+allowScroll+"'"; if(refreshParent==true) 
{ 
GetPostDoPostBackScript(); 
} RegisterStartupScript(Guid.NewGuid().ToString(), "<script language=\"JavaScript\">" + GetPopupScriptModal(url, options, refreshParent,refreshButtonID) + "</script>"); 
} protected string GetPopupScriptModal(string url, string options,bool refreshParent,string refreshButtonID) { string returnScript; if(refreshParent==true) { returnScript="var w=window.showModalDialog(\"" + url + "\", '', " + options + ");__doPostBack('"+refreshButtonID+"','');"; } else { returnScript="var w=window.showModalDialog(\"" + url + "\", '', " + options + ");"; } return returnScript; } /************************************关闭窗体************************/ //关闭一个窗口 //refreshParent:是否刷新父窗体，对模式窗体无效，只能是false public void CspCloseWindow (bool refreshParent) { RegisterClientScriptBlock(Guid.NewGuid().ToString(), "<script language=\"JavaScript\">" + GetCloseWindowScript(refreshParent) + "</script>"); } protected string GetCloseWindowScript(bool refreshParent) { string script=""; if (refreshParent) { script = "window.opener.document.forms(0).submit();"; } return script+"window.close();"; } 来源：互联网
http://netread.caotingna.com/item/gelu-gaoshou-jinlai-taolun-you__90652.aspx