如何从Gridview中的下拉列表中获取值，并通过ajax和jquery将其传递给我的web服务？

<asp:GridView ID="GridView1" runat="server">
    <Columns>
        <asp:TemplateField>
            <ItemTemplate>
                <select class="dropdown">
                    <option value="1">Option 1</option>
                    <option value="2">Option 2</option>
                    <option value="3">Option 3</option>
                </select>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

$(document).ready(function () {
    $("#GridView1").on("change", ".dropdown", function () {
        var selectedValue = $(this).val();
        $.ajax({
            type: "POST",
            url: "YourWebService.asmx/YourMethod",
            data: JSON.stringify({ value: selectedValue }),
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (response) {
                // 处理成功响应
            },
            error: function (xhr, status, error) {
                // 处理错误
            }
        });
    });
});

[WebMethod]
public void YourMethod(string value)
{
    // 处理传递的值
}