using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Diagnostics;using System.Web;using System.Web.Services;using System.Data.SqlClient ;namespace WebService
{
/// <summary>
/// ProductsService 的摘要说明。
/// </summary> public class ProductsService : System.Web.Services.WebService { public ProductsService() { //CODEGEN: 该调用是 ASP.NET Web 服务设计器所必需的 InitializeComponent(); } #region 组件设计器生成的代码 //Web 服务设计器所必需的 private IContainer components = null; /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { } /// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if(disposing && components != null) { components.Dispose(); } base.Dispose(disposing); } #endregion // WEB 服务示例 // HelloWorld() 示例服务返回字符串 Hello World // 若要生成，请取消注释下列行，然后保存并生成项目 // 若要测试此 Web 服务，请按 F5 键 [WebMethod] public string[] GetCategories() { string strSelect; SqlConnection conNorthwind; SqlCommand cmdCategories; SqlDataReader dtrCategories; ArrayList colCategories; strSelect = "SELECT CategoryName FROM Categories"; conNorthwind = new SqlConnection( "server=(local);database=Northwind;uid=sa;pwd=" ); cmdCategories = new SqlCommand( strSelect, conNorthwind ); conNorthwind.Open(); dtrCategories = cmdCategories.ExecuteReader(); colCategories = new ArrayList(); while (dtrCategories.Read()) colCategories.Add( dtrCategories["CategoryName"] ); conNorthwind.Close(); return (string[])colCategories.ToArray( typeof( System.String ) ); } [WebMethod] public string[] GetProducts(string CategoryName) { string strSelect; SqlConnection conNorthwind; SqlCommand cmdProducts; SqlDataReader dtrProducts; ArrayList colProducts; CategoryName = Server.UrlDecode( CategoryName ); strSelect = "SELECT ProductName, UnitPrice " + "FROM Products, Categories WHERE Products.CategoryID = Categories.CategoryID " + "AND CategoryName = @CategoryName"; conNorthwind = new SqlConnection( "server=(local);database=Northwind;uid=sa;pwd="); cmdProducts = new SqlCommand( strSelect, conNorthwind ); cmdProducts.Parameters.Add( new SqlParameter( "@CategoryName", CategoryName ) ); conNorthwind.Open(); dtrProducts = cmdProducts.ExecuteReader(); colProducts = new ArrayList(); while (dtrProducts.Read()) { colProducts.Add( dtrProducts["ProductName"] + String.Format( " - {0:c}", dtrProducts["UnitPrice"] ) ); } conNorthwind.Close(); return (string[])colProducts.ToArray( typeof( System.String ) ); } }
}调用页面
<%@ Page language="c#" Codebehind="WebForm2.aspx.cs" AutoEventWireup="false" Inherits="WebService.WebForm2" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>WebForm2</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">var intCallID = 0;function Init(){ Service.useService("ProductsService.asmx?WSDL","ProductsService"); intCallID = Service.ProductsService.callService( Categories_Result, "GetCategories" );}function Categories_Result( result ){ var Categories = new Array(); Categories = result.value; for (var intCounter = 0;intCounter < Categories.length;intCounter++ ) { var optOption = new Option( Categories[ intCounter ] ); frmProducts.dropCategories.options[ frmProducts.dropCategories.options.length ] = optOption; }}function Categories_Change( newCategory ){ var CategoryName = ""; CategoryName = newCategory.options[ newCategory.selectedIndex ].text; lblCategory.innerText = CategoryName; intCallID = Service.ProductsService.callService( Products_Result, "GetProducts", CategoryName );}function Products_Result( result ){ var Products = new Array(); Products = result.value; frmProducts.lstProducts.options.length = 0; for (var intCounter = 0;intCounter < Products.length;intCounter++ ) { var optOption = new Option( Products[ intCounter ] ); frmProducts.lstProducts.options[ frmProducts.lstProducts.options.length ] = optOption; } // frmProducts.lstProducts.style.display = "block"; } </SCRIPT> </HEAD> <body onload="Init()"> <div id="Service" style="BEHAVIOR:url(webservice.htc)"></div> <form id="frmProducts"> <select name="dropCategories" onchange="Categories_Change(this)"> <option selected>Select Product Category</option> </select> <p> <span id="lblCategory"></span> <br> <select name="lstProducts"> <option selected></option> </select> </form> </P> </body></HTML>demo
https://files.cnblogs.com/gwazy/WebService.rar