ASP.NET / ASP.NET Core: Invoke Method Asynchronous By Delegate

Saturday 30 May 2015

Invoke Method Asynchronous By Delegate

aspx code

<head runat="server">
<title></title>
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
function fnSaveHours() {
debugger;
$.ajax({
type: "POST",
url: "default.aspx/saveHours",
data: "{}",
contentType: "application/json;charset=utf-8",
dataType: "json",
async: false,
success: function (json, result) {
alert(result);
},
error: function (a, b, c) {

alert(a + '<br/>' + b + '<br/>' + c);
},
failure: function () {
alert("Sorry,there is a error!");
}
});
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
<input id="Button1" type="button" value="button" onclick="fnSaveHours();" />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>

C# code

public delegate string DelegateWithOutAndRefParam(string arg1, out int arg2, ref ArrayList list);

protected void Page_Load(object sender, EventArgs e)

{

}

[WebMethod]

public static string saveHours()

{

_default abc = new _default();

for (int i = 0; i < 5; i++)

{

abc.CallfnWithOutAndRefParameters();

}

return "success";

}

protected void btnSubmit_Click(object sender, EventArgs e)

{

for (int i = 0; i < 5; i++)

{

CallfnWithOutAndRefParameters();

}

private string fnWithOutAndRefParam(string arg1, out int arg2, ref ArrayList list)

{

Thread.Sleep(3000);

// lets modify the data!

arg1 = "Modify Value for param1";

arg2 = 200;

list = new ArrayList();

return "Thank you for reading this article";

}

private void CallfnWithOutAndRefParameters()

{

// create the args to pass to the function

string strArg1 = "arg1";

int intValue = 100;

ArrayList list = new ArrayList();

list.Add("Item1");

// create the delegate

DelegateWithOutAndRefParam delfn = new DelegateWithOutAndRefParam(fnWithOutAndRefParam);

// call the beginInvoke function!

IAsyncResult tag = delfn.BeginInvoke(strArg1, out intValue, ref list, null, null);

// normally control is returned right away,

// so you can do other work here...

// calling end invoke notice that intValue and list are passed

// as arguments because they might be updated within the function.

string strResult = delfn.EndInvoke(out intValue, ref list, tag);

// write down the args:

Label1.Text += "arg1: " + strArg1;

Label1.Text +=" arg2: " + intValue;

Label1.Text += " ArrayList count: " + list.Count;

Label1.Text += " return value: " + strResult+"<br/>";

}

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Saturday 30 May 2015

Invoke Method Asynchronous By Delegate

aspx code

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