GridView RowCommand更新将变量发送到javascript函数

<asp:GridView ID="myGridView" runat="server" OnRowCommand="myGridView_RowCommand">
    <Columns>
        <!-- 其他列 -->
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button ID="btnUpdate" runat="server" Text="Update" CommandName="Update" CommandArgument='<%# Eval("Variable") %>' />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

protected void myGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
    if (e.CommandName == "Update")
    {
        int rowIndex = Convert.ToInt32(e.CommandArgument);
        string variable = myGridView.DataKeys[rowIndex].Value.ToString();

        // 调用JavaScript函数，并将变量传递给它
        ClientScript.RegisterStartupScript(GetType(), "UpdateVariable", $"updateVariable('{variable}');", true);
    }
}

function updateVariable(variable) {
    // 处理接收到的变量
    console.log("Received variable: " + variable);
    // 其他操作
}