如何将用户在textbox控件中输入的值传递给global.asax文件？

var textboxValue = document.getElementById("textboxId").value;
$.ajax({
  url: "api/your-api-endpoint",
  method: "POST",
  data: { value: textboxValue },
  success: function(response) {
    console.log("Value sent successfully");
  },
  error: function(error) {
    console.log("Error sending value");
  }
});

[HttpPost]
[Route("api/your-api-endpoint")]
public IHttpActionResult PostValue([FromBody] string value)
{
  HttpContext.Current.Application["textboxValue"] = value;
  return Ok();
}

protected void Application_Start(object sender, EventArgs e)
{
  string textboxValue = HttpContext.Current.Application["textboxValue"] as string;
  // 使用textboxValue进行后续操作
}