C# 在AJAX accordion中更新DataGrid

我有一个来自AJAX控制工具包的AJAX手风琴，在一个页面上，面板的内部有一个datagrid。我有一个自定义itemtemplate，用于在单击行上的“编辑”时创建一个多行文本框。当我单击行上的“更新”时，文本框的原始内容将呈现到文本框中。它应该更新并返回文本，而不是文本框。当我将DataBind（）放入！当我单击“手风琴”窗格时，它不会被渲染。有什么想法吗

代码：

受保护的无效页面加载（对象发送方，事件参数e）
{
announ.HeaderStyle.CssClass=“header”；
注释宽度=单位百分比（100）；
announ.GridLines=GridLines.None；
announ.AutoGenerateColumns=false；
announ.CellPadding=10；
announ.CellSpacing=0；
announ.horizontallign=horizontallign.Center；
announ.HeaderStyle.Font.Bold=true；
announ.EnableViewState=false；
announ.AlternatingItemStyle.BackColor=System.Drawing.Color.GhostWhite；
//announ.DeleteCommand+=AnnounDeleteCommand；
announ.EditCommand+=announ_EditCommand；
announ.UpdateCommand+=announ\u UpdateCommand；
announ.CancelCommand+=announ\u CancelCommand；
announ.DataKeyField=“id”；
var tc1=新模板列
{
HeaderTemplate=新
DataGridTemplate（ListItemType.Header，“公告”），
ItemTemplate=新的DataGridTemplate（ListItemType.Item，“公告文本”），
EditItemTemplate=新建
DataGridTemplate（ListItemType.EditItem，“公告文本”）
};
var editColumn=新的EditCommandColumn
{
ButtonType=ButtonColumnType.Button，
HeaderText=“编辑”，
EditText=“编辑”，
UpdateText=“更新”，
CancelText=“取消”
};
var dateColumn=newboundcolumn{HeaderText=“postedon”，DataField=“date”，ReadOnly=true}；
var expirationColumn=newboundcolumn{HeaderText=“到期日期”，DataField=“到期日”}；
添加注释列（tc1）；
announ.Columns.Add（dateColumn）；
announ.Columns.Add（expirationColumn）；
announ.DataSource=myannounces；
announ.DataBind（）；
var deptMgtaccord=新手风琴
{
ID=“deptmgtcord”，
headercsclass=“手风琴头”，
headerSelected cssclass=“手风琴头Selected”，
自动调整大小=自动调整大小。无，
SelectedIndex=0，
FadeTransitions=true，
转换持续时间=250，
FramesPerSecond=40，
RequiredPane=false，
SuppressHeaderPostbacks=true
};
如果（iPostBack）
{
deptMgtaccord.SelectedIndex=已选择；
}
var announcementPane=newacordionpane{ID=“announcementPane”}；
announcementPane.HeaderContainer.Attributes.Add（“onmouseover”，“this.style.backgroundColor=”#e3e2“；”）；
announcementPane.HeaderContainer.Attributes.Add（“onmouseout”，“this.style.backgroundColor=”#ffffff“；”）；
announcementPane.HeaderContainer.Controls.Add（新的文字控件（“公告>>”））；
announcementPane.ContentContainer.Controls.Add（announ）；
deptmgtagcord.Panes.Add（公告窗格）；
var statsPane=new AccordionPane{ID=“statsPane”}；
statsPane.HeaderContainer.Attributes.Add（“onmouseover”，“this.style.backgroundColor=”#e3e2“；”；
statsPane.HeaderContainer.Attributes.Add（“onmouseout”，“this.style.backgroundColor=”#ffffff“；”）；
statsPane.HeaderContainer.Controls.Add（新的文字控件（“统计信息>>”））；
statsPane.ContentContainer.Controls.Add（新的LiteralControl（“Stats”））；
deptmgtagcord.Panes.Add（statsPane）；
ph1.对照品.添加（deptMgtaccord）；
}
受保护的void announ_CancelCommand（对象源，DataGridCommandEventArgs e）
{
announ.EditItemIndex=-1；
announ.DataBind（）；
}
受保护的void announ_UpdateCommand（对象源，DataGridCommandEventArgs e）
{
var dc=新的MTCDataContext（）；
var announText=（TextBox）e.Item.Cells[1]。控件[1]；
int announId=（int）announ.DataKeys[e.Item.ItemIndex]；
var currentAnnoun=（来自dc中的a）
其中a.id==announId
选择一个.SingleOrDefault（）；
currentAnnoun.announcement\u text=announText.text；
dc.提交更改（）；
    protected void Page_Load(object sender, EventArgs e)
        {
            announ.HeaderStyle.CssClass = "header";
                        announ.Width = Unit.Percentage(100);
                        announ.GridLines = GridLines.None;
                        announ.AutoGenerateColumns = false;
                        announ.CellPadding = 10;
                        announ.CellSpacing = 0;
                        announ.HorizontalAlign = HorizontalAlign.Center;
                        announ.HeaderStyle.Font.Bold = true;
                        announ.EnableViewState = false;
                        announ.AlternatingItemStyle.BackColor = System.Drawing.Color.GhostWhite;
                        //announ.DeleteCommand += AnnounDeleteCommand;
                        announ.EditCommand += announ_EditCommand;
                        announ.UpdateCommand += announ_UpdateCommand;
                        announ.CancelCommand += announ_CancelCommand;
                        announ.DataKeyField = "id";
                        var tc1 = new TemplateColumn
                                      {
                                          HeaderTemplate = new
                                              DataGridTemplate(ListItemType.Header, "Announcement"),
                                          ItemTemplate = new DataGridTemplate(ListItemType.Item, "announcement_text"),
                                          EditItemTemplate = new
                                              DataGridTemplate(ListItemType.EditItem, "announcement_text")
                                      };



                    var editColumn = new EditCommandColumn
                                         {
                                             ButtonType = ButtonColumnType.PushButton,
                                             HeaderText = "Edit",
                                             EditText = "Edit",
                                             UpdateText = "Update",
                                             CancelText = "Cancel"
                                         };
    var dateColumn = new BoundColumn {HeaderText = "Posted On", DataField = "date", ReadOnly = true};
                    var expirationColumn = new BoundColumn {HeaderText = "Expiration Date", DataField = "expiration_date"};
    announ.Columns.Add(tc1);
                    announ.Columns.Add(dateColumn);
                    announ.Columns.Add(expirationColumn);
    announ.DataSource = myAnnouncements;
                    announ.DataBind();

var deptMgtaccord = new Accordion
                                        {
                                            ID = "deptMgtaccord",
                                            HeaderCssClass = "accordion-header",
                                            HeaderSelectedCssClass = "accordion-headerSelected",
                                            AutoSize = AutoSize.None,
                                            SelectedIndex = 0,
                                            FadeTransitions = true,
                                            TransitionDuration = 250,
                                            FramesPerSecond = 40,
                                            RequireOpenedPane = false,
                                            SuppressHeaderPostbacks = true
                                        };
                if (IsPostBack)
                {
                    deptMgtaccord.SelectedIndex = selected;
                }

                var announcementPane = new AccordionPane {ID = "announcementPane"};
                announcementPane.HeaderContainer.Attributes.Add("onmouseover", "this.style.backgroundColor='#e3e2e2';");
                announcementPane.HeaderContainer.Attributes.Add("onmouseout", "this.style.backgroundColor='#ffffff';");
                announcementPane.HeaderContainer.Controls.Add(new LiteralControl("Announcements >>"));
                announcementPane.ContentContainer.Controls.Add(announ);
                deptMgtaccord.Panes.Add(announcementPane);
                var statsPane = new AccordionPane {ID = "statsPane"};
                statsPane.HeaderContainer.Attributes.Add("onmouseover", "this.style.backgroundColor='#e3e2e2';");
                statsPane.HeaderContainer.Attributes.Add("onmouseout", "this.style.backgroundColor='#ffffff';");
                statsPane.HeaderContainer.Controls.Add(new LiteralControl("Statistics >>"));
                statsPane.ContentContainer.Controls.Add(new LiteralControl("Stats"));
                deptMgtaccord.Panes.Add(statsPane);
ph1.Controls.Add(deptMgtaccord);
    }

           protected void announ_CancelCommand(object source, DataGridCommandEventArgs e)
            {
                announ.EditItemIndex = -1;
                announ.DataBind();
            }

            protected void announ_UpdateCommand(object source, DataGridCommandEventArgs e)
            {
                var dc = new MTCDataDataContext();
                var announText = (TextBox) e.Item.Cells[1].Controls[1];
                int announId = (int)announ.DataKeys[e.Item.ItemIndex];
                var currentAnnoun = (from a in dc.announcements
                                     where a.id == announId
                                     select a).SingleOrDefault();
                currentAnnoun.announcement_text = announText.Text;
                dc.SubmitChanges();

                announ.EditItemIndex = -1;
                announ.DataBind();
            }

            protected void announ_EditCommand(object source, DataGridCommandEventArgs e)
            {
                announ.EditItemIndex = e.Item.ItemIndex;
                announ.DataBind();
            }


public class DataGridTemplate : ITemplate
    {
        ListItemType templateType;
        string columnName;
        public DataGridTemplate(ListItemType type, string colname)
        {
            templateType = type;
            columnName = colname;
        }

        public void InstantiateIn(Control container)
        {
            Literal lc = new Literal();
            TextBox tb = new TextBox();
            switch (templateType)
            {
                case ListItemType.Header:
                    lc.Text = "<B>" + columnName + "</B>";
                    container.Controls.Add(lc);
                    break;
                case ListItemType.Item:
                    lc.DataBinding += lc_DataBinding;
                    container.Controls.Add(lc);
                    break;
                case ListItemType.EditItem:
                    tb.TextMode = TextBoxMode.MultiLine;
                    tb.Rows = 6;
                    tb.Columns = 57;
                    tb.DataBinding += tb_DataBinding;
                    container.Controls.Add(tb);
                    break;
                case ListItemType.Footer:
                    lc.Text = "<I>" + columnName + "</I>";
                    container.Controls.Add(lc);
                    break;
            }
        }
        void tb_DataBinding(object sender, EventArgs e)
        {
            TextBox tb = (TextBox)sender;
            DataGridItem row = (DataGridItem)tb.NamingContainer;
            tb.ID = "txt_" + row.ItemIndex;
            tb.Text = DataBinder.Eval(row.DataItem, columnName).ToString();
        }
        void lc_DataBinding(object sender, EventArgs e)
        {
            Literal lc = (Literal)sender;
            DataGridItem row = (DataGridItem)lc.NamingContainer;
            lc.ID = "txt_" + row.ItemIndex;
            lc.Text = DataBinder.Eval(row.DataItem, columnName).ToString();
        }
    }