客户程序：
第一步：新建一个Application。
第二步：File----->New----->Other------>WebServices----->WSDL Importer
然后在Location of WSDL File or URL中填入：
http://10.22.30.61:36601/MonitorService.asmx?wsdl
或 http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl，然后确定即生成了一个新的接口定义单元。
第二步：在主form上放上一个按钮和一个Httprio组件（在WebServices页上），并引用第二个单元（即通过WSDL Importer自动生成的单元）
在Httprio的属性页上的WsdlLocation里面填上http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl；然后在Httprio属性页上的Port和Service上选择上相应的数据即可。
第三步：书写客户调用程序，原代码如下：
procedure TForm1.Button1Click(Sender: TObject);
var
i: Integer;
TMP_Weather: ArrayOfString;
begin
//http://developer.51cto.com/art/200908/147125.htm
//http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl
TMP_Weather := (HTTPRIO1 as WeatherWebServiceSoap).getWeatherbyCityName('53698'); //石家庄
Memo1.Lines.Clear;
for i := 0 to 22 do
begin
Memo1.Lines.Add(TMP_Weather[i]);
end;
end;
---- 错误信息为：
Project Project1.exe raised exception class ERemotableException with message '服务器无法处理请求。 ---> 未将对象引用设置到对象的实例。'. Process stopped. Use Step or Run to continue.
------解决方案--------------------------------------------------------
修改一下WeatherWebService.pas这个单元，如下所示，一切就OK啦。
Delphi(Pascal) code
if HTTPRIO = nil then RIO := THTTPRIO.Create(nil) else RIO := HTTPRIO; RIO.HTTPWebNode.UseUTF8InHeader:= True; //这里加上这一句 try Result := (RIO as TestStationSoap); if UseWSDL then begin RIO.WSDLLocation := Addr; RIO.Service := defSvc; RIO.Port := defPrt; end else RIO.URL := Addr; finally if (Result = nil) and (HTTPRIO = nil) then RIO.Free; end; InvRegistry.RegisterInterface(TypeInfo(WeatherWebServiceSoap), 'http://WebXml.com.cn/', 'utf-8'); InvRegistry.RegisterDefaultSOAPAction(TypeInfo(WeatherWebServiceSoap), 'http://WebXml.com.cn/%operationName%'); RemClassRegistry.RegisterXSInfo(TypeInfo(ArrayOfString), 'http://WebXml.com.cn/', 'ArrayOfString'); RemClassRegistry.RegisterXSClass(getSupportDataSetResult, 'http://WebXml.com.cn/', 'getSupportDataSetResult'); InvRegistry.RegisterInvokeOptions(TypeInfo(WeatherWebServiceSoap), ioDocument);//这里加上这一句------解决方案--------------------------------------------------------补充一下，如果你用到HTTPRIO1去调webservice接口那就记得在前面加上这句HTTPRIO1.HTTPWebNode.UseUTF8InHeader:= True;//解决汉字乱码问题
本文出自：http://blog.csdn.net/gjtao1130/article/details/12193235 只是做部分修正。
//-------------以下是本人模仿的例子，窗体没有用到Httprio组件，通过GetWeatherWebServiceSoap函数处理即可。
1 // ************************************************************************ // 2 // The types declared in this file were generated from data read from the 3 // WSDL File described below: 4 // WSDL : http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl 5 // Encoding : utf-8 6 // Version : 1.0 7 // (2014/12/10 11:28:28 - 1.33.2.5) 8 // ************************************************************************ // 9 10 unit WeatherWebService; 11 12 interface 13 14 uses InvokeRegistry, SOAPHTTPClient, Types, XSBuiltIns; 15 16 type 17 18 // ************************************************************************ // 19 // The following types, referred to in the WSDL document are not being represented 20 // in this file. They are either aliases[@] of other types represented or were referred 21 // to but never[!] declared in the document. The types from the latter category 22 // typically map to predefined/known XML or Borland types; however, they could also 23 // indicate incorrect WSDL documents that failed to declare or import a schema type. 24 // ************************************************************************ // 25 // !:string - "http://www.w3.org/2001/XMLSchema" 26 27 getSupportDataSetResult = class; { "http://WebXml.com.cn/" } 28 29 ArrayOfString = array of WideString; { "http://WebXml.com.cn/" } 30 31 32 // ************************************************************************ // 33 // Namespace : http://WebXml.com.cn/ 34 // ************************************************************************ // 35 getSupportDataSetResult = class(TRemotable) 36 private 37 Fschema: WideString; 38 published 39 property schema: WideString read Fschema write Fschema; 40 end; 41 42 43 // ************************************************************************ // 44 // Namespace : http://WebXml.com.cn/ 45 // soapAction: http://WebXml.com.cn/%operationName% 46 // transport : http://schemas.xmlsoap.org/soap/http 47 // binding : WeatherWebServiceSoap 48 // service : WeatherWebService 49 // port : WeatherWebServiceSoap 50 // URL : http://www.webxml.com.cn/WebServices/WeatherWebService.asmx 51 // ************************************************************************ // 52 WeatherWebServiceSoap = interface(IInvokable) 53 ['{0AF62441-3FA0-F5D8-B6B8-B486F32F9DDE}'] 54 function getSupportCity(const byProvinceName: WideString): ArrayOfString; stdcall; 55 function getSupportProvince: ArrayOfString; stdcall; 56 function getSupportDataSet: getSupportDataSetResult; stdcall; 57 function getWeatherbyCityName(const theCityName: WideString): ArrayOfString; stdcall; 58 function getWeatherbyCityNamePro(const theCityName: WideString; const theUserID: WideString): ArrayOfString; stdcall; 59 end; 60 61 function GetWeatherWebServiceSoap(UseWSDL: Boolean=System.False; Addr: string=''; HTTPRIO: THTTPRIO = nil): WeatherWebServiceSoap; 62 63 64 implementation 65 66 function GetWeatherWebServiceSoap(UseWSDL: Boolean; Addr: string; HTTPRIO: THTTPRIO): WeatherWebServiceSoap; 67 const 68 defWSDL = 'http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl'; 69 defURL = 'http://www.webxml.com.cn/WebServices/WeatherWebService.asmx'; 70 defSvc = 'WeatherWebService'; 71 defPrt = 'WeatherWebServiceSoap'; 72 var 73 RIO: THTTPRIO; 74 begin 75 Result := nil; 76 if (Addr = '') then 77 begin 78 if UseWSDL then 79 Addr := defWSDL 80 else 81 Addr := defURL; 82 end; 83 if HTTPRIO = nil then 84 RIO := THTTPRIO.Create(nil) 85 else 86 RIO := HTTPRIO; 87 RIO.HTTPWebNode.UseUTF8InHeader:= True; //这里加上这一句 88 try 89 Result := (RIO as WeatherWebServiceSoap); 90 if UseWSDL then 91 begin 92 RIO.WSDLLocation := Addr; 93 RIO.Service := defSvc; 94 RIO.Port := defPrt; 95 end else 96 RIO.URL := Addr; 97 finally 98 if (Result = nil) and (HTTPRIO = nil) then 99 RIO.Free; 100 end; 101 end; 102 103 104 initialization 105 InvRegistry.RegisterInterface(TypeInfo(WeatherWebServiceSoap), 'http://WebXml.com.cn/', 'utf-8'); 106 InvRegistry.RegisterDefaultSOAPAction(TypeInfo(WeatherWebServiceSoap), 'http://WebXml.com.cn/%operationName%'); 107 RemClassRegistry.RegisterXSInfo(TypeInfo(ArrayOfString), 'http://WebXml.com.cn/', 'ArrayOfString'); 108 RemClassRegistry.RegisterXSClass(getSupportDataSetResult, 'http://WebXml.com.cn/', 'getSupportDataSetResult'); 109 InvRegistry.RegisterInvokeOptions(TypeInfo(WeatherWebServiceSoap), ioDocument);//这里加上这一句 110 111 end.
1 unit Unit1; 2 3 interface 4 5 uses 6 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 7 Dialogs, StdCtrls, ExtCtrls;//, InvokeRegistry, Rio, SOAPHTTPClient; 8 9 type 10 TForm1 = class(TForm) 11 mmo1: TMemo; 12 pnl1: TPanel; 13 btn1: TButton; 14 procedure btn1Click(Sender: TObject); 15 private 16 { Private declarations } 17 public 18 { Public declarations } 19 end; 20 21 var 22 Form1: TForm1; 23 24 implementation 25 26 {$R *.dfm} 27 //网页例子 http://blog.csdn.net/gjtao1130/article/details/12193235 28 uses WeatherWebService; 29 30 procedure TForm1.btn1Click(Sender: TObject); 31 var 32 i: Integer; 33 TMP_Weather: ArrayOfString; 34 begin 35 //http://developer.51cto.com/art/200908/147125.htm 36 //http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl 37 {TMP_Weather := (htpr1 as WeatherWebServiceSoap).getSupportCity('广西');//玉林 (59453) 38 mmo1.Lines.Clear; 39 for i := 0 to 10 do 40 begin 41 mmo1.Lines.Add(TMP_Weather[i]); 42 end; } 43 //TMP_Weather := (htpr1 as WeatherWebServiceSoap).getWeatherbyCityName('59453'); //深圳 44 TMP_Weather := GetWeatherWebServiceSoap(False,'',nil).getWeatherbyCityName('59453'); 45 //GetWeatherWebServiceSoap(Self).getWeatherbyCityName('59453'); //玉林 (59453) 46 mmo1.Lines.Clear; 47 for i := 0 to 22 do 48 begin 49 mmo1.Lines.Add(TMP_Weather[i]); 50 end; 51 end; 52 53 end.
1 object Form1: TForm1 2 Left = 295 3 Top = 167 4 Width = 592 5 Height = 427 6 Caption = '天气预报WebService' 7 Color = clBtnFace 8 Font.Charset = DEFAULT_CHARSET 9 Font.Color = clWindowText 10 Font.Height = -11 11 Font.Name = 'MS Sans Serif' 12 Font.Style = [] 13 OldCreateOrder = False 14 PixelsPerInch = 96 15 TextHeight = 13 16 object mmo1: TMemo 17 Left = 0 18 Top = 41 19 Width = 576 20 Height = 348 21 Align = alClient 22 Color = clMoneyGreen 23 ImeName = '中文 (简体) - 搜狗拼音输入法' 24 ScrollBars = ssVertical 25 TabOrder = 0 26 end 27 object pnl1: TPanel 28 Left = 0 29 Top = 0 30 Width = 576 31 Height = 41 32 Align = alTop 33 Color = clGradientActiveCaption 34 TabOrder = 1 35 object btn1: TButton 36 Left = 40 37 Top = 8 38 Width = 106 39 Height = 25 40 Caption = '测试天气信息' 41 TabOrder = 0 42 OnClick = btn1Click 43 end 44 end 45 end