如何在使用C#动态创建时保持StateManagedCollection？

人~

我正在使用C#创建一个从CompositeDataBoundControl继承的自定义gridview。 我有一个公共财产，称为“列”，如下所示

    private FixedGridColumnCollection _columnCollection = null;
    /// <summary>
    /// FixedGrid's columns
    /// </summary>
    [Category("BANANA Framework")]
    [Description("Gets or sets FixedGrid's columns")]
    [Editor(typeof(FixedGridColumnCollectionEditor), typeof(UITypeEditor))]
    [PersistenceMode(PersistenceMode.InnerDefaultProperty)]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    [ReadOnly(true)]
    public FixedGridColumnCollection Columns
    {
        get
        {
            if (this._columnCollection == null)
                this._columnCollection = new FixedGridColumnCollection();
            if (base.IsTrackingViewState)
            {
                ((IStateManager)(this._columnCollection)).TrackViewState();
            }
            return _columnCollection;
        }
    }

我的代码怎么了？

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有人能给我一些线索吗？

如果在页面初始化中加载列，这些列应该能够足够早地获取视图状态，并且所有列都应该每次呈现。仅在第一页请求时加载数据。大概是这样的：

protected void Page_Init(object sender, EventArgs e)
{
    BANANA.Web.Controls.BoundDataField field = null;
    BANANA.Web.Controls.TemplateField tField = null;

    tField = new BANANA.Web.Controls.TemplateField();
    tField.ItemTemplate = new GridViewRadioButtonTemplate("APPSTATUS", _strRadioButtonID);
    tField.ID = "APPSTATUS";
    tField.Width = 30;
    tField.HorizontalAlignment = BANANA.Web.Controls.HorizontalAlignment.Center;
    this.FixedGrid1.Columns.Add(tField);
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        FixedGrid1.DataSource = _dt;
        FixedGrid1.DataBind();
    }
}

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何时动态添加字段？你只是在页面加载时添加字段并绑定数据，而在回发时忽略吗？@user1258536我编辑了一些代码，以便在添加列时显示。我只在不回发时添加一次列。因为，有些字段必须从用户处获取值。

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BANANA.Web.Controls.BoundDataField field = null;
            BANANA.Web.Controls.TemplateField tField = null;

            tField = new BANANA.Web.Controls.TemplateField();
            tField.ItemTemplate = new GridViewRadioButtonTemplate("APPSTATUS", _strRadioButtonID);
            tField.ID = "APPSTATUS";
            tField.Width = 30;
            tField.HorizontalAlignment = BANANA.Web.Controls.HorizontalAlignment.Center;
            this.FixedGrid1.Columns.Add(tField);

            FixedGrid1.DataSource = _dt;
            FixedGrid1.DataBind();
        }
    }

protected void Page_Init(object sender, EventArgs e)
{
    BANANA.Web.Controls.BoundDataField field = null;
    BANANA.Web.Controls.TemplateField tField = null;

    tField = new BANANA.Web.Controls.TemplateField();
    tField.ItemTemplate = new GridViewRadioButtonTemplate("APPSTATUS", _strRadioButtonID);
    tField.ID = "APPSTATUS";
    tField.Width = 30;
    tField.HorizontalAlignment = BANANA.Web.Controls.HorizontalAlignment.Center;
    this.FixedGrid1.Columns.Add(tField);
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        FixedGrid1.DataSource = _dt;
        FixedGrid1.DataBind();
    }
}