Question

我有一个带有GridView的应用程序，这个GridView在你的PagerTemplate中有一个GridViewPager，它是一个UserControl。

现在我正在尝试将此GridViewPager存储在ViewState中，并且我遇到了序列化问题。 Asp.Net告诉我该类没有标记为可序列化。我尝试将其标记为可序列化，如下所示：

namespace Avalon.View.UserControls.Pagers
{
    [Serializable]
    public partial class GridViewPager : System.Web.UI.UserControl
    {
        private GridView _gridView;
        public event EventHandler OnTextPageChanged;

        // Methods, properties...
    }
}

但它不起作用

我的代码很简单，让我们看看：

// Get and set the GridViewPager to ViewState
public partial class ChamadoList : System.Web.UI.UserControl
{
    // Here a Get and set my GridViewPager into ViewState
    public GridViewPager gvp
    {
        get { return ((GridViewPager)ViewState["GridViewPager"]); }
        set
        {
            if (value == null)
                ViewState["GridViewPager"] = null;
            else
                ViewState["GridViewPager"] = value;
        }
    }

    // Looping in a grid View i get the GridViewPager and put it on ViewState
    protected void gvListaChamados_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        // Here a get the pager 
        if (e.Row.RowType == DataControlRowType.Pager)
        {
            gvp = (GridViewPager)e.Row.FindControl("GridViewPager1");
        }
    }

    //...
}

这是错误

'/'应用程序中的服务器错误。

在程序集'App_Web_epwoiz7x中输入'ASP.view_usercontrols_pagers_gridviewpager_ascx'，Version = 0.0.0.0，Culture = neutral，PublicKeyToken = null'未标记为可序列化。描述：执行当前Web请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。

异常详细信息：System.Runtime.Serialization.SerializationException：在程序集'App_Web_epwoiz7x中输入'ASP.view_usercontrols_pagers_gridviewpager_ascx'，Version = 0.0.0.0，Culture = neutral，PublicKeyToken = null'未标记为可序列化。

来源错误：

在执行当前Web请求期间生成了未处理的异常。可以使用下面的异常堆栈跟踪来识别有关异常的起源和位置的信息。

堆栈追踪：

[SerializationException：在程序集'App_Web_epwoiz7x中输入'ASP.view_usercontrols_pagers_gridviewpager_ascx'，Version = 0.0.0.0，Culture = neutral，PublicKeyToken = null'未标记为可序列化。 System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers（RuntimeType type）+7733643 System.Runtime.Serialization.FormatterServices.GetSerializableMembers（Type type，StreamingContext context）+258 System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo（）+111 System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize（Object obj，ISurrogateSelector surrogateSelector，StreamingContext context，SerObjectInfoInit serObjectInfoInit，IFormatterConverter converter，ObjectWriter objectWriter）+161 System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.Serialize（Object obj，ISurrogateSelector surrogateSelector，StreamingContext context，SerObjectInfoInit serObjectInfoInit，IFormatterConverter converter，ObjectWriter objectWriter）+51 System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize（Object graph，Header [] inHeaders，__BinaryWriter serWriter，Boolean fCheck）+410 System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize（Stream serializationStream，Object graph，Header [] headers，Boolean fCheck）+134 System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize（Stream serializationStream，Object graph）+13 System.Web.UI.ObjectStateFormatter.SerializeValue（SerializerBinaryWriter writer，Object value）+845

[ArgumentException：序列化'ASP.view_usercontrols_pagers_gridviewpager_ascx'类型的值'ASP.view_usercontrols_pagers_gridviewpager_ascx'时出错。 System.Web.UI.ObjectStateFormatter.SerializeValue（SerializerBinaryWriter writer，Object value）+3395 System.Web.UI.ObjectStateFormatter.Serialize（Stream outputStream，Object stateGraph）+110 System.Web.UI.ObjectStateFormatter.Serialize（Object stateGraph）+57 System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Serialize（Object state）+4 System.Web.UI.Util.SerializeWithAssert（IStateFormatter formatter，Object stateGraph）+37 System.Web.UI.HiddenFieldPageStatePersister.Save（）+79 System.Web.UI.Page.SavePageStateToPersistenceMedium（Object state）+105 System.Web.UI.Page.SaveAllState（）+236 System.Web.UI.Page.ProcessRequestMain（Boolean includeStagesBeforeAsyncPoint，Boolean includeStagesAfterAsyncPoint）+1099

版本信息：Microsoft .NET Framework版本：2.0.50727.3082; ASP.NET版本：2.0.50727.4028

Answer 1

为什么不让UserControl管理自己的ViewState而不是尝试自行序列化？

public partial class GridViewPager : System.Web.UI.UserControl
{ 
    private int _startPage;

    public int StartPage 
    { 
        get { return _startPage; }
        set { _startPage = value; }
    }   

    protected override void LoadViewState(object savedState) 
    {
        object[] totalState = null;       
        if (savedState != null)
        {
           totalState = (object[])savedState;
           if (totalState.Length == 2)
           {
                base.LoadViewState(totalState[0]);
                // Load back your properties, etc. from ViewState
                if (totalState[1] != null)
                    startPage = int.Parse(totalState[1]);
            }
        }
    }

    protected override object SaveViewState()
    {
        object baseState = base.SaveViewState();
        object[] totalState = new object[2];
        // Save out your properties, etc. to ViewState.
        totalState[0] = baseState;
        totalState[1] = _startPage;
        return totalState;
    }
}

这样，当您将UserControl添加到页面时，它将管理自己的ViewSate。

如何序列化ASP.NET UserControl

1 个答案: