Aug 22, 2015

ASP.NET Ajax AutoCompleteExtender Without Using Web Service

Steps

Create an ASP.NET 4.0 Web Application
Add reference to AjaxControlToolit
Open Default.aspx
Add Script Manager
Add Ajax AutoCompleteExtender 
Using the Code
Using the code (default.aspx)

Hide   Copy Code
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
<asp:ScriptManager ID="ScriptManager1" runat="server" 
EnablePageMethods = "true">
</asp:ScriptManager>

Enter a Product Name
<asp:TextBox ID="txtProductList" runat="server"></asp:TextBox>
<cc1:AutoCompleteExtender ServiceMethod="GetProductList" 
    MinimumPrefixLength="1"
    CompletionInterval="0" EnableCaching="false" CompletionSetCount="10" 
    TargetControlID="txtProductList"
    ID="autoCompleteExtender1" runat="server" FirstRowSelected = "false">
</cc1:AutoCompleteExtender>
    </div>
    </form>
</body>
</html>

Default.aspx.cs


[System.Web.Script.Services.ScriptMethod()]
    [System.Web.Services.WebMethod]
    public static string[] GetProductList(string prefixText, int count)
    {
        // Get the Products From Data Source. Change this method to use Database
        List<string> productList = GetProducts();

        // Find All Matching Products
        var list = from p in productList
                   where p.Contains(prefixText)
                   select p;

        //Convert to Array as We need to return Array
        string[] prefixTextArray = list.ToArray<string>();

        //Return Selected Products
        return prefixTextArray;
    }  
Points of Interest
If you want that your method responds to the Scripting Language, make sure to add [System.Web.Script.Services.ScriptMethod()] to method attribute. Else, this won't work
And yes, this does not require addition of Web Service!

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