数据绑定不刷新Gridview

// 数据源发生变化后
gridview.DataSource = newDataSource;
gridview.DataBind();

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
   <ContentTemplate>
        <asp:GridView ID="gridview" runat="server">
        </asp:GridView>
    </ContentTemplate>
</asp:UpdatePanel>

// 数据源发生变化后
gridview.DataSource = newDataSource;
gridview.DataBind();
UpdatePanel1.Update();

<asp:GridView ID="gridview" runat="server">
</asp:GridView><script src="https://code.jquery.com/jquery-3.6.0.min.js"></script><script>
    function updateGridView() {
        $.ajax({
            type: "POST",
            url: "Default.aspx/UpdateGridView",
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (response) {
                $("#gridview").html(response.d);
            },
            error: function (response) {
                alert("Error: " + response.statusText);
            }
        });
    }
</script>

[WebMethod]
public static string UpdateGridView()
{
    // 数据源发生变化后
    GridView gridview = new GridView();
    gridview.DataSource = newDataSource;
    gridview.DataBind();

    StringWriter sw = new StringWriter();
    HtmlTextWriter htw = new HtmlTextWriter(sw);
    gridview.RenderControl(htw);

    return sw.ToString();
}

// 数据源发生变化后
ScriptManager.RegisterStartupScript(this, GetType(), "updateGridView", "updateGridView();", true);