Question

我有一个asp日历视图，我在其中生成对日历日期更改的所选索引的动态控制。所以我面临一个回发问题，因为动态控件在点击后分散，所以我需要将这个选定的索引更改事件调用到页面加载中，以便动态控件保持其状态

protected void Calendar1_SelectionChanged1(object sender, EventArgs e)
{
    try
    {
        DateTime sDate = new DateTime();
        sDate = Calendar1.SelectedDate;
        sDay = sDate.ToString("MM/dd/yyyy");
        string doc = ddlDoctor.SelectedValue.ToString();
        DataTable dt = tsbll.GetAvailableSlotsbyDocAndDate(doc, sDay);

        foreach (DataRow dr in dt.Rows)
        {
            Button label = new Button();
            label.Text = dr["SlotTime"].ToString();
            //label.Style["Left"] = "20px";
            label.CssClass = "btn btn-primary";
            //label.CssClass = "background - color: #19bc49;";
            label.Click += new EventHandler(labelClick);
            pnlLabel.Controls.Add(label);

        }
    }
    catch (Exception ex) { throw new Exception(ex.ToString()); }
}

Answer 1

您无需在SelectedIndexChanged中调用Page_Load事件处理程序。您必须调用生成动态控件的方法。可以从Page_Load和事件处理程序调用此方法。

protected void GenerateDocSlotLabels(string doc, DateTime day)
{
    string sDay = day.ToShortDateString();
    DataTable dt = tsbll.GetAvailableSlotsbyDocAndDate(doc, sDay);

    foreach (DataRow dr in dt.Rows)
    {
        Button label = new Button();
        label.Text = dr["SlotTime"].ToString();
        //label.Style["Left"] = "20px";
        label.CssClass = "btn btn-primary";
        //label.CssClass = "background - color: #19bc49;";
        label.Click += new EventHandler(labelClick);
        pnlLabel.Controls.Add(label);
    }
}

现在从两个事件处理程序中调用它。例如：

protected void Calendar1_SelectionChanged1(object sender, EventArgs e)
{
    DateTime sDate = Calendar1.SelectedDate;
    string doc = ddlDoctor.SelectedValue.ToString();
    GenerateDocSlotLabels(doc, sDate);
}

...

protected void Page_Load(object sender, EventArgs e)
{
   DateTime sDate = Calendar1.SelectedDate;
   string doc = ddlDoctor.SelectedValue.ToString();
   GenerateDocSlotLabels(doc, sDate);
}

旁注：我删除了您的Catch，因为它没有任何用处。应该使用throw而非throw ex来重新排除异常以保留原始堆栈跟踪。

如何在asp.net

1 个答案: