📄 asyncwsclient.aspx

📁 《ASP.NET 2.0 XML 高级编程（第3版）》《ASP.NET 2.0 XML 高级编程（第3版）》

💻 ASPX

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<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<script runat="server">
    void btnInvoke_Click(object sender, EventArgs e)
    {
        CategoriesProxy.CategoriesService obj = new CategoriesProxy.CategoriesService();
        IAsyncResult result;
        result = obj.BeginGetCategoriesAsDataSet(null, null);
        //Do some dummy processing.
        //      ...
        //Completed processing.  Wait for completion.
        result.AsyncWaitHandle.WaitOne();
        DataSet categoriesDataSet = obj.EndGetCategoriesAsDataSet(result);
        output.DataSource = categoriesDataSet.Tables[0];
        output.DataBind();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Asynchronous Invocation of Web Services</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button runat="server" Text="Invoke Web Service"
         OnClick="btnInvoke_Click" ID="btnInvoke" />
         <br/><br/>
        <asp:GridView runat="server" ID="output" />
    </div>
    </form>
</body>
</html>

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