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我在 Visual Studio 2010 中创建了一个 Web 服务。我创建了一个包含命令及其描述的表的数据库。我的程序是：我的课程：-DataHelper.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data;
using System.Data.SqlClient;

/// <summary>
/// Summary description for DataHelper
/// </summary>

    public class DataHelper
    {
        public static string GetData(string Command)
        {
            string Explanation = " ";
            SqlConnection con = new SqlConnection(@"Data Source=CSS-L3-D008;Initial Catalog=works1;Integrated Security=true;");
            SqlCommand cmd = new SqlCommand("Select Explanation from Data1 where Command= '" + Command.ToUpper() + "'", con);
            con.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            while (dr.Read())
            {
                Explanation = dr["Explanation"].ToString();
            }
            dr.Close();
            con.Close();
            return Explanation;

        }
    }

和Service1.asmx

Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel

' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
' <System.Web.Script.Services.ScriptService()> _
<System.Web.Services.WebService(Namespace:="http://tempuri.org/")> _
<System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<ToolboxItem(False)> _
Public Class Service1
    Inherits System.Web.Services.WebService

    Private Property DataHelper As Object

    <WebMethod()>
    Public Function HelloWorld() As String
        Return "Hello World"
    End Function


    <WebMethod()>
    Public Function GetData(Command) As String

        Return DataHelper.GetData(Command)
    End Function
End Class

问题是，当我运行它时，我得到了 webmethods HelloWorld 和 GetData 但 GetData 不起作用。当我单击 HelloWorld() 时，我得到调用方法并且它运行正常。但是当我单击 GetData() 时，我得到调用按钮，然后它显示“测试表单仅适用于以原始类型作为参数的方法。” 实际上它应该给出一个框，我可以在其中输入命令，并且应该从 sql server 返回描述。请帮助我。

4

1 回答 1

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服务中的 GetData 方法是否应该声明 Command 参数的类型？：

<WebMethod()>
Public Function GetData(Command As String) As String
    Return DataHelper.GetData(Command)
End Function
于 2012-08-10T13:39:32.790 回答