使用ICallbackEventHandler接口实现页面无刷新

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

public partial class Index : System.Web.UI.Page, ICallbackEventHandler

{

    string returnValue;

    protected void Page_Load(object sender, EventArgs e)

    {

        string ReceiveScript = @"

function ReceiveServerData(arg)

{

    document.forms['Form1'].TestTxt.value = arg;

}";

        ClientScript.RegisterClientScriptBlock(this.GetType(), "ReceiveServerData", ReceiveScript, true);

        string CallbackScript = @"

function CallTheServer(arg) {

    " + ClientScript.GetCallbackEventReference(this, "arg", "ReceiveServerData", null) + @";