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，我已经制作了一个具有onclick事件的自定义ASP表格单元格。以下课程：

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); 
        }
    }
}

我的用户控件中有一个方法，它使用我的自定义表格单元格创建此表格。在用户控件的页面加载中触发此方法，以便始终填充表。始终将相同的ID分配给可单击的表格单元格，但是我设置的单击事件永远不会被触发。好吧，当我在ASCX文件中声明可点击的表格单元格时会被触发，如果我以编程方式添加它就不起作用，所以我认为我的表格单元格类没有任何问题。

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，如果我将此代码放在页面加载中，它将捕获点击。

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"));

   }
}

谁能看到我哪里出错了？任何帮助将不胜感激。

Answer 1

表格和客户表格单元格的html输出是什么样的？

单击方法上的自定义表格单元格在以编程方式添加单元格时不会触发

1 个答案: