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JavaScript调用Web Services实现无刷新三联动

發(fā)布時間：2023/12/13 javascript 28 豆豆

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http://singlepine.cnblogs.com/articles/301009.html

使用微軟提供的webservice.htc實(shí)現(xiàn)通過JavaScript調(diào)用WebService.
1.首先從微軟網(wǎng)站上下載webservice.htc,我附件源代碼也包含，不下載也可以
http://msdn.microsoft.com/workshop/author/webservice/webservice.htc
2.在網(wǎng)頁BODY中添加一個DIV，實(shí)現(xiàn)對webservice.htc的引用

<div?id="service"?style="BEHAVIOR:url(webservice.htc)"></div>
3.編寫JavaScript，實(shí)現(xiàn)對WebService的引用：
function?window_onload()?
????????????{
????????????????service.useService("/Service1.asmx?WSDL","myselect");
????????????????str_province=service.myselect.callService(province_Result,"getProvince");
????????????}useService 語法:
sElementID.useService(sWebServiceURL, sFriendlyName [, oUseOptions])
useService 參數(shù):

sElementID

Required. The of the element to which the behavior is attached.

sWebServiceURL

Required. String specifying the URL of the Web Service, using one of the following path types. See the examples section, where several variations of this parameter are shown.

Web Service file name	A Web service file, which has an .asmx file extension. This short form of the URL is sufficient, provided that the Web service is located in the same folder as the Web page using the WebService behavior. In this case, the ?WSDL query string is assumed by the behavior.
WSDL file name	A Web Services Description Language (WSDL) file name. The WSDL file must have a .wsdl file extension.
Full file path	Full path to a WebService (.asmx) or WSDL (.wsdl) file. A file path to a Web Service must include the ?WSDL query string. Either a local file path or a URL can be specified.
Relative path	A relative path to a WebService (.asmx) or WSDL (.wsdl) file. A file path to a Web Service must include the ?WSDL query string.

sFriendlyName

Required. String representing a friendly name for the Web Service URL.

oUseOptions

Optional. An instance of the object.

callService語法:
iCallID = sElementID.sFriendlyName.callService( [oCallHandler], fo, oParam)
callService參數(shù):

sElementID

Required. The of the element to which the behavior is attached.

sFriendlyName

Required. The friendly name for the Web Service, which is defined by calling the method.

oCallHandler

Optional. Name of a script callback function that handles the results returned from this instance of the method call.

Required. One of the following possible values.

strFuncName	A String representing the name of the remote function being called. The String must be bounded by single or double quotation marks.
objCall	A object, which has the necessary properties defined to call a remote function.

oParam

Required. One or more comma-delimited parameters, which are passed to the method name specified by fo.

4.建立WebService，代碼如下
public?class?Service1?:?System.Web.Services.WebService
????{
????????public?static?string?ConnectionString=System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
????????SqlConnection?conn=new?SqlConnection(ConnectionString);

????????public?Service1()
????????{
????????????//CODEGEN:?This?call?is?required?by?the?ASP.NET?Web?Services?Designer
????????????InitializeComponent();
????????}

????????Component?Designer?generated?code#region?Component?Designer?generated?code
????????
????????//Required?by?the?Web?Services?Designer?
????????private?IContainer?components?=?null;
????????????????
????????/**////?<summary>
????????///?Required?method?for?Designer?support?-?do?not?modify
????????///?the?contents?of?this?method?with?the?code?editor.
????????///?</summary>
????????private?void?InitializeComponent()
????????{
????????}

????????/**////?<summary>
????????///?Clean?up?any?resources?being?used.
????????///?</summary>
????????protected?override?void?Dispose(?bool?disposing?)
????????{
????????????if(disposing?&&?components?!=?null)
????????????{
????????????????components.Dispose();
????????????}
????????????base.Dispose(disposing);????????
????????}
????????
????????#endregion
????????
????????getProvince#region?getProvince
????????[WebMethod(true)]
????????public?string?getProvince()
????????{
????????????string?sql="select?*?from?province";
????????????SqlCommand?cmd=new?SqlCommand(sql,conn);?

????????????cmd.Connection.Open();
????????????SqlDataReader?dr=cmd.ExecuteReader();

????????????string?s="";
????????????while(dr.Read())
????????????{
????????????????s?+=?","?+?dr["provinceID"].ToString()?+?"|"?+?dr["province"].ToString();
????????????}
????????????return?s;
????????}

????????#endregion

????????getCity#region?getCity
????????[WebMethod(true)]
????????public?string?getCity(string?provinceid)
????????{
????????????string?str="select?*?from?city?where?father?=?'"+provinceid+"'";
????????????SqlCommand?cmd=new?SqlCommand(str,conn);?

????????????cmd.Connection.Open();
????????????SqlDataReader?dr=cmd.ExecuteReader();

????????????string?s="";
????????????while(dr.Read())
????????????{
????????????????s?+=?","?+?dr["cityID"].ToString()?+?"|"?+?dr["city"].ToString();
????????????}
????????????return?s;
????????}

????????#endregion

????????getArea#region?getArea
????????[WebMethod(true)]
????????public?string?getArea(string?cityid)
????????{
????????????string?str="select?*?from?area?where?father='"+cityid+"'";
????????????SqlCommand?cmd=new?SqlCommand(str,conn);?

????????????cmd.Connection.Open();
????????????SqlDataReader?dr=cmd.ExecuteReader();

????????????string?s="";
????????????while(dr.Read())
????????????{
????????????????s?+=?","?+?dr["areaID"].ToString()?+?"|"?+?dr["area"].ToString();
????????????}
????????????return?s;
????????}
????????#endregion
????}5.建立測試頁面
<HTML>
????<HEAD>
????????<title>jsWebServices</title>
????????<meta?name="GENERATOR"?Content="Microsoft?Visual?Studio?.NET?7.1">
????????<meta?name="CODE_LANGUAGE"?Content="C#">
????????<meta?name="vs_defaultClientScript"?content="JavaScript">
????????<meta?name="vs_targetSchema"?content="http://schemas.microsoft.com/intellisense/ie5">
????????<script?language="javascript">
????????
????????</script>
????</HEAD>
????<body?MS_POSITIONING="GridLayout"?onload="return?window_onload()">
????????<div?id="service"?style="BEHAVIOR:url(webservice.htc)"></div>
????????<form?id="Form1"?method="post"?runat="server">
????????????<SELECT?id="select_province"?onchange="province_onchange();"?style="Z-INDEX:?101;?LEFT:?8px;?WIDTH:?128px;?POSITION:?absolute;?TOP:?16px">
????????????????<OPTION?selected></OPTION>
????????????</SELECT><SELECT?id="select_city"?onchange="city_onchange();"?style="Z-INDEX:?102;?LEFT:?160px;?WIDTH:?128px;?POSITION:?absolute;?TOP:?16px">
????????????????<OPTION?selected></OPTION>
????????????</SELECT><SELECT?id="select_area"?style="Z-INDEX:?103;?LEFT:?304px;?WIDTH:?128px;?POSITION:?absolute;?TOP:?16px">
????????????????<OPTION?selected></OPTION>
????????????</SELECT>
????????</form>
????</body>
</HTML>6.引用webservicers
7.數(shù)據(jù)庫腳本
if?exists?(select?*?from?dbo.sysobjects?where?id?=?object_id(N'[dbo].[area]')?and?OBJECTPROPERTY(id,?N'IsUserTable')?=?1)
drop?table?[dbo].[area]
GO

if?exists?(select?*?from?dbo.sysobjects?where?id?=?object_id(N'[dbo].[province]')?and?OBJECTPROPERTY(id,?N'IsUserTable')?=?1)
drop?table?[dbo].[province]
GO

if?exists?(select?*?from?dbo.sysobjects?where?id?=?object_id(N'[dbo].[city]')?and?OBJECTPROPERTY(id,?N'IsUserTable')?=?1)
drop?table?[dbo].[city]
GO

CREATE?TABLE?[dbo].[area]?(
????[id]?[int]?NOT?NULL?,
????[areaID]?[nvarchar]?(50)?COLLATE?Chinese_PRC_CI_AS?NULL?,
????[area]?[nvarchar]?(60)?COLLATE?Chinese_PRC_CI_AS?NULL?,
????[father]?[nvarchar]?(6)?COLLATE?Chinese_PRC_CI_AS?NULL?
)?ON?[PRIMARY]
GO

CREATE?TABLE?[dbo].[province]?(
????[id]?[int]?NOT?NULL?,
????[provinceID]?[nvarchar]?(6)?COLLATE?Chinese_PRC_CI_AS?NULL?,
????[province]?[nvarchar]?(40)?COLLATE?Chinese_PRC_CI_AS?NULL?
)?ON?[PRIMARY]
GO

CREATE?TABLE?[dbo].[city]?(
????[id]?[int]?NOT?NULL?,
????[cityID]?[nvarchar]?(6)?COLLATE?Chinese_PRC_CI_AS?NULL?,
????[city]?[nvarchar]?(50)?COLLATE?Chinese_PRC_CI_AS?NULL?,
????[father]?[nvarchar]?(6)?COLLATE?Chinese_PRC_CI_AS?NULL?
)?ON?[PRIMARY]
GO8.下載真實(shí)數(shù)據(jù)/Files/singlepine/area.rar
9.源代碼下載/Files/singlepine/jsWebServices.rar

轉(zhuǎn)載于:https://www.cnblogs.com/291099657/archive/2009/04/09/1432493.html

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