asp.net Request.Param 用法

Request.Params 是在 QueryString、Form、Server Variable 以及 Cookies 找資料， 他首先在 QueryString 集合尋找資料，如果在 QueryString 找到資料，就返回資料，如果沒有找到就去 Form 集合中尋找資料，找到就返回，否則在往下一下個集合尋找資料。

執行個體

代碼如下

複製代碼

Main HTML function jumpToPage(obj) { var url = obj.options[obj.selectedIndex].value; if (url != "none") { parent.frames ["contentframe"].location = url; } } <select name="select" onchange="javascript:jumpToPage (this)" class="DropDownMenu" ID="Select1"> <option value="simplepage.aspx?rptid=<%# "Test"% >">Report1</option> </select> //This is the SimplePage.apsx <%@ Register TagPrefix="CrystalReports" Namespace="CrystalDecisions.Web" Assembly="CrystalDecisions.Web, Version=9.1.5000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304" %> <@ Page Src="SimplePage.cs" Inherits="CRSamples.SimplePage" % <form method="POST" runat="server" > Test Reports <CrystalReports:CrystalReportViewer id="CrystalReportViewer1" runat="server" width="350px" height="50px" pagetotreeratio="4" borderstyle="Dotted" borderwidth="1px"/> </asp:button \This is the SimplePage.cs using System; using System.Web; using Microsoft.Win32; namespace CRSamples { public class SimplePage : System.Web.UI.Page { protected CrystalDecisions.Web.CrystalReportViewer CrystalReportViewer1; protected void Page_Init(object sender, EventArgs e) { Uri MyUrl = Request.Url; string rptid=Request.Params.Get("rptid"); Response.Write(rptid); } } }

Request.Params["id"] ,Request.Form["id"] ,Request.QueryString["id"] 的用法以及區別?
Request.Params是所有post和get傳過來的值的集合,Request.Form是取post傳值, Request.QueryString是get傳過來的值

執行個體

代碼如下

複製代碼

package com.ehi.struts.interceptor.servicemanagement; import java.util.ArrayList; import java.util.List; import java.util.Map; import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor; import com.opensymphony.xwork2.ActionInvocation; import org.apache.commons.lang.StringUtils; /** * An interceptor to trim all the parameters. <br> * It's bascially adapted from the book, <br/> * 'Apache Struts 2 Web Application Development' * * @author candicew * */ @SuppressWarnings("serial") public class TrimInterceptor extends MethodFilterInterceptor { private List<String> excluded = new ArrayList<String>(); protected String doIntercept(ActionInvocation invocation) throws Exception { Map<String, Object> parameters = invocation.getInvocationContext().getParameters(); for (String param : parameters.keySet()) { if (shouldTrim(param)) { doTrim(parameters, param); } } return invocation.invoke(); } void doTrim(Map<String, Object> parameters, String param) { Object val = parameters.get(param); if(val == null){ return; } if (val instanceof String) { trimString(parameters, param, val); } else { trimStringArray(parameters, param, val); } } private void trimString(Map<String, Object> parameters, String param, Object val) { String value = (String) val; value = StringUtils.trimToNull(value); parameters.put(param, value); } private void trimStringArray(Map<String, Object> parameters, String param, Object val) { String[] vals = (String[]) val; boolean allNull = true; for (int i = 0; i < vals.length; i++) { vals[i] = StringUtils.trimToNull(vals[i]); allNull = allNull && (vals[i] == null); } if (allNull) { parameters.put(param, null); } } private boolean shouldTrim(String param) { for (String exclude : excluded) { if (param.equalsIgnoreCase(exclude)) { return false; } } return true; } public void setExcludedParams(String excludedParams) { for (String s : StringUtils.split(excludedParams, ",")) { excluded.add(s.trim()); } } }