104 lines
3.1 KiB
Plaintext
104 lines
3.1 KiB
Plaintext
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<%@ Page Language="C#" AutoEventWireup="true" %>
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<%@ Implements Interface="System.Web.UI.ICallbackEventHandler" %>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<script runat="server" >
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protected System.Collections.Specialized.ListDictionary catalog;
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protected String returnValue;
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public bool raiseCallbackEvent;
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public bool getCallbackResult;
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protected void Page_Load (object sender, EventArgs e)
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{
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String cbReference =
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Page.ClientScript.GetCallbackEventReference (this,
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"arg", "ReceiveServerData", "context", null, false);
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String callbackScript;
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callbackScript = "function CallServer(arg, context)" +
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"{ " + cbReference + ";}";
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Page.ClientScript.RegisterClientScriptBlock (this.GetType (),
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"CallServer", callbackScript, true);
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catalog = new System.Collections.Specialized.ListDictionary ();
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catalog.Add ("monitor", 12);
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catalog.Add ("laptop", 10);
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catalog.Add ("keyboard", 23);
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catalog.Add ("mouse", 17);
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ListBox1.DataSource = catalog;
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ListBox1.DataTextField = "key";
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ListBox1.DataBind ();
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}
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protected override void OnPreInit (EventArgs e)
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{
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MonoTests.SystemWeb.Framework.WebTest t = MonoTests.SystemWeb.Framework.WebTest.CurrentTest;
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if (t != null)
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t.Invoke (this);
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base.OnPreInit (e);
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}
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void System.Web.UI.ICallbackEventHandler.RaiseCallbackEvent (String eventArgument)
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{
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raiseCallbackEvent = true;
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if (catalog[eventArgument] == null) {
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returnValue = "-1";
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}
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else {
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returnValue = catalog[eventArgument].ToString ();
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}
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}
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String System.Web.UI.ICallbackEventHandler.GetCallbackResult ()
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{
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getCallbackResult = true;
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if (getCallbackResult == true)
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returnValue += "|true";
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else
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returnValue += "|false";
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if (raiseCallbackEvent == true)
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returnValue += "|true";
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else
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returnValue += "|false";
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return returnValue;
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}
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</script>
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" >
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<head id="Head1" runat="server">
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<title>Client Callback Example</title>
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<script type="text/ecmascript">
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function LookUpStock()
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{
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var lb = document.getElementById("ListBox1");
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var product = lb.options[lb.selectedIndex].text;
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CallServer(product, "");
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}
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function ReceiveServerData(rValue)
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{
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document.getElementById("ResultsSpan").innerHTML = rValue;
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}
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</script>
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</head>
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<body>
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<form id="form1" runat="server">
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<div>
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<asp:ListBox ID="ListBox1" Runat="server"></asp:ListBox>
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<br />
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<br />
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<button type="Button" onclick="LookUpStock()">Look Up Stock</button>
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<br />
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<br />
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Items in stock: <span id="ResultsSpan" runat="server"></span>
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<br />
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</div>
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</form>
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</body>
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</html>
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