Web服务返回Dataset对象

usingSystem;

usingSystem.Web.Configuration;

usingSystem.Web.Services;

usingSystem.Data;

usingSystem.Data.SqlClient;

usingSystem.Diagnostics;

///<summary>

///SummarydescriptionforCategoryService

///</summary>

[WebService(Namespace="http://tempuri.org/")]

[WebServiceBinding(ConformsTo=WsiProfiles.BasicProfile1_1)]

//ToallowthisWebServicetobecalledfromscript,usingASP.NETAJAX,uncommentthefollowingline.

//[System.Web.Script.Services.ScriptService]

publicclassCategoryService:System.Web.Services.WebService{

publicCategoryService(){

//Uncommentthefollowinglineifusingdesignedcomponents

//InitializeComponent();

}

[WebMethod]

publicDataSetGetCategoriesAsDataset()

{

try

{

using(SqlConnectionconn=newSqlConnection())

{

stringconnectionString=WebConfigurationManager.ConnectionStrings["AdventureWorks"].ConnectionString;

conn.ConnectionString=connectionString;

SqlCommandcommand=newSqlCommand("select*fromProduction.ProductCategory",conn);

command.CommandType=CommandType.Text;

SqlDataAdapteradapter=newSqlDataAdapter(command);

DataSetcategories=newDataSet("Categories");

adapter.Fill(categories);

returncategories;

}

}

catch(Exceptionex)

{

EventLog.WriteEntry("Application",ex.Message);

throwex;

}

}

}

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