Asp.net Request. Param usage

Request. params searches for data in QueryString, Form, Server Variable, and Cookies. It first searches for data in the QueryString set. If the data is found in QueryString, the data is returned, if no data is found, search for data in the Form set. If no data is found, return. Otherwise, search for data in the next set.

Instance

The code is as follows:

Copy code

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"] usage and difference?
Request. Params is a collection of all post and get values. Request. Form is the post value, and Request. QueryString is the get value.

Instance

The code is as follows:

Copy code

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. Fig (exclude )){ Return false; } } Return true; } Public void setExcludedParams (String excludedParams ){ For (String s: StringUtils. split (excludedParams ,",")){ Excluded. add (s. trim ()); } } }