Question

我正在从数据库打印并使用循环。我已经在asp中完成了这个，但我正在改为c＃asp.net并遇到麻烦。

首先，我打印日程表标题

时间|法院|法院|法庭

根据法院的数量，它打印游戏。接下来，当前记录日期与在整个表格行上打印日期的最后日期不同。然后它检查当前记录的时间是否与最后一个相同，如果它不打印时间，然后是游戏记录，如果它只是打印游戏记录。

我的问题是我在时间中声明TableRow，如果我在另一个语句中尝试使用它，那么它超出了范围。如果我在if语句之外使用tablerow，它就不能正确打印。

这就是我所拥有的。

for (int i = 0; i < GameCount; i++) 
    { 
        DateTime currentdatetime = (DateTime)Schedules.Tables["Schedule"].Rows[i]["datetime"]; 
        string ndate = currentdatetime.ToString("MM/dd/yyy"); 
        string ntime = currentdatetime.ToString("HH:mm"); 
        string nextdate = currentdatetime.ToString("MM/dd/yyy"); 
        if (i + 1 != GameCount) 
        { 
            DateTime nextdatetime = (DateTime)Schedules.Tables["Schedule"].Rows[i + 1]["datetime"]; 
            nextdate = nextdatetime.ToString("MM/dd/yyy"); 
        } 
        string TeamA = Schedules.Tables["Schedule"].Rows[i]["teamA"].ToString(); 
        string TeamB = Schedules.Tables["Schedule"].Rows[i]["teamB"].ToString(); 
        //check to see if date is current 
        if (LastDate != ndate) 
        { 
            TableRow daterow = new TableRow(); 
            TableCell datecell = new TableCell(); 
            datecell.ColumnSpan = 7; 
            datecell.Controls.Add(new LiteralControl(ndate)); 
            daterow.Cells.Add(datecell); 
            ScheduleTable.Rows.Add(daterow); 
            LastDate = ndate; 
        } 
        //print the games 



        if (currentdatetime != LastDateTime)
        {
            TableRow gamerow = new TableRow();
TableCell timecell = new TableCell();
            timecell.Controls.Add(new LiteralControl(ntime));
            gamerow.Cells.Add(timecell);

            if (i + 1 != GameCount & ndate != nextdate)
            {
                ScheduleTable.Rows.Add(gamerow);
            }
        }//check to see if next game is part of the current row  
        else
        {
            TableCell gamecell = new TableCell();
            gamecell.Controls.Add(new LiteralControl(TeamA + ".vs." + TeamB));
            gamerow.Cells.Add(gamecell);
        } 


    }

我还可以发布我目前在asp中的内容，如果这会有所帮助......你可以访问www.swgc.ca/volleyball/2011/schedules.asp看看我想要实现的目标。

由于

Answer 1

将您的最后一位更改为：

        TableRow gamerow = new TableRow();

        if (currentdatetime != LastDateTime)
        {

            TableCell timecell = new TableCell();
            timecell.Controls.Add(new LiteralControl(ntime));
            gamerow.Cells.Add(timecell);


        }//check to see if next game is part of the current row  
        else
        {
            TableCell gamecell = new TableCell();
            gamecell.Controls.Add(new LiteralControl(TeamA + ".vs." + TeamB));
            gamerow.Cells.Add(gamecell);
        } 

        if (i + 1 != GameCount & ndate != nextdate)
         {
                ScheduleTable.Rows.Add(gamerow);
         }

我强烈建议您查看网格视图和转发器/列表控件，因为这就是它们的用途。

Answer 2

最简单的解决方案是将实例化拉出for循环。试试这个（未经测试的代码）：

    TableRow gamerow = new TableRow();
    TableCell timecell = new TableCell();
    TableCell gamecell = new TableCell();
    TableRow daterow = new TableRow();
    TableCell datecell = new TableCell();
    for (int i = 0; i < GameCount; i++)
    {
        DateTime currentdatetime = (DateTime)Schedules.Tables["Schedule"].Rows[i]["datetime"];
        string ndate = currentdatetime.ToString("MM/dd/yyy");
        string ntime = currentdatetime.ToString("HH:mm");
        string nextdate = currentdatetime.ToString("MM/dd/yyy");
        if (i + 1 != GameCount)
        {
            DateTime nextdatetime = (DateTime)Schedules.Tables["Schedule"].Rows[i + 1]["datetime"];
            nextdate = nextdatetime.ToString("MM/dd/yyy");
        }
        string TeamA = Schedules.Tables["Schedule"].Rows[i]["teamA"].ToString();
        string TeamB = Schedules.Tables["Schedule"].Rows[i]["teamB"].ToString();
        //check to see if date is current 
        if (LastDate != ndate)
        {
             daterow = new TableRow();
             datecell = new TableCell();
            datecell.ColumnSpan = 7;
            datecell.Controls.Add(new LiteralControl(ndate));
            daterow.Cells.Add(datecell);
            ScheduleTable.Rows.Add(daterow);
            LastDate = ndate;
        }
        //print the games 



        if (currentdatetime != LastDateTime)
        {
             gamerow = new TableRow();
             timecell = new TableCell();
            timecell.Controls.Add(new LiteralControl(ntime));
            gamerow.Cells.Add(timecell);

            if (i + 1 != GameCount & ndate != nextdate)
            {
                ScheduleTable.Rows.Add(gamerow);
            }
        }//check to see if next game is part of the current row  
        else
        {
             gamecell = new TableCell();
            gamecell.Controls.Add(new LiteralControl(TeamA + ".vs." + TeamB));
            gamerow.Cells.Add(gamecell);
        }

这是针对您的问题的非优化答案。我觉得可能有更好的OO方式来实现你的目标，但不想回答你没有问过的问题。

如果声明，C＃ASP.net变量超出范围

2 个答案: