AsyncFileUpload序列化异常

我正在使用AsyncFileUpload控件上载图像。 它在localhost上运行良好,但当我将其上传到服务器上时,出现以下错误。

我甚至不能理解这个错误的原因。如果有任何答复,我将不胜感激。

这就是我正在使用的方法

protected void AsyncFileUpload1_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e) 
{
    string email = WriteYourEmailTXT.Text;
    var dt = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day).ToString("ddMMyyyy");
    string parentFolder = Server.MapPath("uploads");
    string childFolder = parentFolder + "\\" + email + "\\";
    if (!Directory.Exists(childFolder))
        Directory.CreateDirectory(childFolder);

    string counter = getCount();
    if (AsyncFileUpload1.HasFile) {
        string ext = getExtension(AsyncFileUpload1.FileName);
        string finalName = dt + "_" + counter + ext;
        string finalPath = childFolder + finalName;
        AsyncFileUpload1.SaveAs(finalPath);
        SetCount();
        SetFileName(finalName);
    }
}

protected void SetCount() 
{
    HttpCookie aCookie = Request.Cookies["CountPhoto"];
    int cookieNum = 0;
    if (aCookie != null)
        if (aCookie.Value != "")
            cookieNum = int.Parse(aCookie.Value.ToString());

    string newvalue = (cookieNum + 1).ToString();
    Response.Cookies["CountPhoto"].Value = newvalue;
}

protected void SetFileName(string fileName) 
{
    HttpCookie aCookie = Request.Cookies["FileName"];
    var filename = "";
    if (aCookie != null)
        if (aCookie.Value != "") {
            filename = aCookie.Value;
        }
    string newFileName = filename + "," + fileName;
    Response.Cookies["FileName"].Value = newFileName;
}

在“StateServer”和“SQLServer”模式下, ASP.NET将序列化会话 状态对象,因此 MarshalByRef对象不是 被允许同样的限制 如果需要类似的序列化,则适用 由自定义会话状态存储完成 在“自定义”模式下。

[序列化异常:类型] 中的“System.Web.HttpPostedFile” 程序集'System.Web,版本=2.0.0.0, 文化=中立, 未标记为可序列化。]
System.Runtime.Serialization.FormatterServices.InternalGetSerializationMembers(RuntimeType 类型)+7733643
System.Runtime.Serialization.FormatterServices.GetSerializationMembers(类型 类型,StreamingContext)+258
+111 System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerializate(对象 obj,ISurrogateSelector 代理选择程序,StreamingContext 上下文,SeroObjectInfoinit 血清目标信息素 转换器,ObjectWriter(ObjectWriter) +161 System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.Serializate(对象 obj,ISurrogateSelector 代理选择程序,StreamingContext 血清目标信息素 +51 System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serializate(对象 图表,标题[]吸入装置, __二进制编写器serWriter,布尔fCheck)+410
标题[]标题,布尔fCheck)+134 System.Web.Util.AltSerialization.WriteValueToStream(对象

[HttpException(0x80004005):无法 序列化会话状态。在里面 ASP.NET将序列化会话 不可序列化的对象或 MarshalByRef对象不是 被允许同样的限制 如果需要类似的序列化,则适用 由自定义会话状态存储完成 在“自定义”模式下。]
值,二进制编写器)+1662
System.Web.SessionState.SessionStateItemCollection.WriteValueToStreamWithAssert(对象 值,二进制编写器)+34
作家)+606
System.Web.SessionState.SessionStateUtility.Serialize(SessionStateStoreData
项目,Int32 initialStreamSize,字节[]&
System.Web.SessionState.OutOfProcSessionStateStore.SetAndReleaseItemExclusive(HttpContext 上下文,字符串id, lockId,布尔值newItem)+87
System.Web.SessionState.SessionStateModule.OnReleaseState(对象
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +68 System.Web.HttpApplication.ExecuteTep(IExecutionStep +75