在编程添加单元格时，单击方法时不会触发自定义表格单元格

Question

我正在尝试在.Net v4中创建自定义日历用户控件。对于这个控件，我做了一个自定义的ASP表格单元格，它有一个onclick事件。 Class下：

public class ClickableTableCell : System.Web.UI.WebControls.TableCell, IPostBackEventHandler 
{ 
    private static readonly object TableCellClicked = new object(); 

    public event EventHandler Click 
    { 
     add 
     { 
      base.Events.AddHandler(TableCellClicked, value); 
     } 
     remove 
     { 
      base.Events.RemoveHandler(TableCellClicked, value); 
     } 
    } 

    public override void RenderBeginTag(HtmlTextWriter writer) 
    { 
     string argument = null; 

     if (this.ID != null) 
     { 
      argument = this.ID.ToString().Replace("/", "-"); 
     } 

     Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(this, argument)); 
     base.RenderBeginTag(writer); 
    } 

    public void RaisePostBackEvent(string eventArgument) 
    { 
     OnClick(new EventArgs()); 
    } 

    protected void OnClick(EventArgs e) 
    { 
     EventHandler handler = (EventHandler)base.Events[TableCellClicked]; 

     if (handler != null) 
     { 
      handler(this, e); 
     } 
    } 
} 

我在使用我自定义表格单元格它创建这个表我的用户控件有一个方法。此方法在用户控件的页面加载中触发，以便始终填充表格。相同的ID始终分配给可点击的表格单元格，但我设置的点击事件从未被触发。当我在ASCX文件中声明可单击的表格单元格时，它会被触发，如果我以编程方式添加它，则不起作用，所以我不认为我的表格单元格类有任何问题。

protected void DrawMonth(DateTime monthToDraw, CultureInfo calCulture) 
    { 
     try 
     { 
      tblCal.Rows.Clear(); 

      System.Globalization.Calendar calToDraw = calCulture.Calendar; 

      DayOfWeek firstDayOfWeek = calCulture.DateTimeFormat.FirstDayOfWeek; 

      //Add in day headings 
      TableHeaderRow dayHeadings = new TableHeaderRow(); 

      int dayToStartFrom = (int)firstDayOfWeek; 

      for (int iDay = 0; iDay < 7; iDay++) 
      { 
       TableHeaderCell dayCell = new TableHeaderCell(); 

       dayCell.ID = "tcDayHeader" + iDay; 
       dayCell.Text = calCulture.DateTimeFormat.DayNames[dayToStartFrom]; 

       dayCell.Width = new Unit(14.28, UnitType.Percentage); 

       dayHeadings.Cells.Add(dayCell); 

       dayToStartFrom++; 

       if (dayToStartFrom > 6) 
       { 
        dayToStartFrom = 0; 
       } 
      } 

      tblCal.Rows.Add(dayHeadings); 

      //Add in dates 
      int startOffset = (int)calToDraw.GetDayOfWeek(new DateTime(monthToDraw.Year, monthToDraw.Month, 1).AddDays(-1)); 
      int endOffset = (int)calToDraw.GetDayOfWeek(new DateTime(monthToDraw.Year, monthToDraw.Month, calToDraw.GetDaysInMonth(monthToDraw.Year, monthToDraw.Month))); 
      if (endOffset > 0) 
      { 
       endOffset = 7 - (int)calToDraw.GetDayOfWeek(new DateTime(monthToDraw.Year, monthToDraw.Month, calToDraw.GetDaysInMonth(monthToDraw.Year, monthToDraw.Month))); 
      } 
      int dateOn = 1; 

      int numOfWeeks = Helpers.DateHelper.GetNumOfWeeksInMonth(monthToDraw, calToDraw); 

      DateTime cellDate; 

      for (int iNumWeek = 0; iNumWeek <= numOfWeeks - 1; iNumWeek++) 
      { 
       TableRow weekRow = new TableRow(); 
       weekRow.ID = "rowWeek" + iNumWeek.ToString(); 

       for (int iNumDayInWeek = 0; iNumDayInWeek <= 6; iNumDayInWeek++) 
       { 
        ClickableTableCell dayCell = new ClickableTableCell(); 

        if (iNumWeek == 0) 
        { 
         if (iNumDayInWeek < startOffset) 
         { 
          dayCell.CssClass = "OutOfBounds"; 
         } 
         else 
         { 
          dayCell.Text = dateOn.ToString(); 

          dateOn++; 
         } 
        } 
        else if (iNumWeek == numOfWeeks - 1) 
        { 
         if (iNumDayInWeek > 6 - endOffset) 
         { 
          dayCell.CssClass = "OutOfBounds"; 
         } 
         else 
         { 
          dayCell.Text = dateOn.ToString(); 

          dateOn++; 
         } 
        } 
        else 
        { 
         dayCell.Text = dateOn.ToString(); 

         dateOn++; 
        } 

        dayCell.Width = new Unit(14.28, UnitType.Percentage); 

        if (monthToDraw.Year == DateTime.Now.Year && monthToDraw.Month == DateTime.Now.Month && (dateOn - 1) == DateTime.Now.Day) 
        { 
         dayCell.CssClass = "Today"; 
        } 

        // Get calendar data 
        if (dayCell.CssClass != "OutOfBounds") 
        { 
         cellDate = monthToDraw.AddDays((monthToDraw.Day * -1) - 1 + dateOn).Date; 
         dayCell.ID = cellDate.ToString().Replace(' ', '-'); 
        } 

        // add click event to the TableCell 
        dayCell.Click += new EventHandler(this.DayClicked); 
        dayCell.Attributes.Add("onmouseover", "this.style.cursor='pointer'"); 

        // add cell to collection 
        weekRow.Cells.Add(dayCell); 
       } 

       tblCal.Rows.Add(weekRow); 
      } 

      lblCurrentMonth.Text = calCulture.DateTimeFormat.MonthNames[monthToDraw.Month - 1] + " " + monthToDraw.Year.ToString(); 

      tblCal.CssClass = "AppointCal"; 
     } 
     catch (Exception _exception) 
     { 
      throw new Exception(_exception.ToString()); 
     } 
    } 

有趣的是，如果我把这段代码放在页面加载中，它会捕获点击。

if (Page.IsPostBack) 
{ 
    //It is a postback so check if it was by div click 
    string target = Request["__EVENTTARGET"]; 
    if (target.Contains("ctl00$cphContent$amaAppointmentsCal$")) 
    { 
      //ClickableTableCell clickedCell = (ClickableTableCell)sender; 
      string id = Request["__EVENTARGUMENT"]; 
      DrawDay(Convert.ToDateTime(id), new CultureInfo("en-GB")); 

    } 
} 

任何人都可以看到哪里即将出错？任何帮助，将不胜感激。

Answer 1

表格和客户表单元格的html输出是什么样的？