Page Methods

Remarks:

More than one parameter

In the example the C# function just request one parameter, if you need to pass more than one you can do it, just put them in order in your JS call and you are good to go. Ej.

//C#
public static int SumValues(int num1, int num2, int num3, ..., int numN)

//JS
PageMethods.SumValues(num1, num2, num3, ..., numN, onSuccess, onError);

Return value

In the onSuccess function the result is going to be the C# function's return value. In the onError function the result is going to be the error.

How to call it

Just add the using at the beginning and the [WebMethod] decorator to the static method to be called in the aspx page:

using System.Web.Services;

public partial class MyPage : System.Web.UI.Page
{
    [WebMethod]
    public static int GetRandomNumberLessThan(int limit)
    {
        var r = new Random();
        return r.Next(limit);
    }
}

In your .aspx file add a asp:ScriptManager enabling Page Methods:

<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
</asp:ScriptManager>

Then you can call it from JS like this:

var limit= 42 // your parameter value
PageMethods.GetRandomNumberLessThan(limit, onSuccess, onError);
function onSuccess(result) {
    var randomNumber = result;
    // use randomNumber...
}
function onError(result) {
    alert('Error: ' + result);
}

Parameters:

Parameter	Detail
limit	The parameter of the C# method. You supply the argument via the Page Method.
onSuccess	The JavaScript function that is executed when the Page Method call is successful.
onError	The JavaScript function that is executed when there is an error in the Page Method call.

Contributors

Topic Id: 1411

Example Ids: 4615

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