в 15:30, 26 мая 2010

2010-05-26T15:30:57Z

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2010-05-26T11:57:44Z

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== Aborting the Previous Asynchronous Postback==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void btnGetFortune_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000); // wait 3 seconds
lblFortune.Text = String.Format("At {0:T}, the oracle says: ", DateTime.Now);
Random rnd = new Random();
switch (rnd.Next(4))
{
case 0:
lblFortune.Text += "You"re doomed!";
break;
case 1:
lblFortune.Text += "Good luck is around the corner.";
break;
case 2:
lblFortune.Text += "Don"t leave home.";
break;
case 3:
lblFortune.Text += "Buy stock today.";
break;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>UpdatePanel Abort</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="up1" runat="server">
<ContentTemplate>
<asp:Button
id="btnGetFortune"
Text="Get Fortune"
OnClick="btnGetFortune_Click"
Runat="server" />
<asp:Button
id="btnCancel"
Text="Cancel"
Enabled="false"
Runat="server" />
<br />
<asp:Label ID="lblFortune" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest(prm_initializeRequest);
function prm_initializeRequest(sender, args)
{
if (args.get_postBackElement().id == "btnCancel")
{
prm.abortPostBack();
alert("Fortune Aborted!");
}
else
{
$get("btnCancel").disabled = false;
}
}
</script>
</body>
</html></source>

== Canceling the Current Asynchronous Postback==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void btnSubmit_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000); // sleep 3 seconds
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>UpdatePanel Cancel</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="up1" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<%= DateTime.Now.ToString("T") %>
<asp:Button
id="btnSubmit1"
Text="Submit 1"
OnClick="btnSubmit_Click"
Runat="server"/>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="up2" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<%= DateTime.Now.ToString("T") %>
<asp:Button
id="btnSubmit2"
Text="Submit 2"
OnClick="btnSubmit_Click"
Runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest( prm_initializeRequest );
function prm_initializeRequest(sender, args)
{
if (prm.get_isInAsyncPostBack())
{
alert("Still Processing First Request");
args.set_cancel(true);
}
}
</script>
</body>
</html></source>

== Passing Additional Information During an Asynchronous Postback==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void dtlProduct_DataBound(object sender, EventArgs e)
{
string productTitle = (string)DataBinder.Eval(dtlProduct.DataItem, "Title");
if (sm1.IsInAsyncPostBack)
{
sm1.RegisterDataItem(Head1, productTitle);
}
else
{
Head1.Title = productTitle;
hTitle.InnerHtml = productTitle;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>UpdatePanel DataItem</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager
id="sm1"
Runat="server" />
<h1 id="hTitle" runat="server"></h1>

<asp:UpdatePanel
id="upSearch"
Runat="server">
<ContentTemplate>
<asp:DetailsView
id="dtlProduct"
DataSourceID="srcProducts"
AllowPaging="true"
Runat="server" OnDataBound="dtlProduct_DataBound" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:SqlDataSource
id="srcProducts"
ConnectionString="<%$ ConnectionStrings:con %>"
SelectCommand="SELECT Id,Title,Director FROM Product"
Runat="server" />
</div>
</form>
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_pageLoaded( prm_pageLoaded );
function prm_pageLoaded(sender, args)
{
if (prm.get_isInAsyncPostBack())
{
var productTitle = args.get_dataItems()["Head1"];
document.title = productTitle;
$get("hTitle").innerHTML = productTitle;
}
}
</script>
</body>
</html></source>

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ASP.NET Tutorial/Ajax/Asynchronous Event - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия