从中继器获取复选框对象

Question

我有一个中继器，我正在尝试从 LinkBut​​ton 事件访问 Checkbox 控制器。中继器控件仅包含文字和链接按钮，但不包含复选框控件。

<asp:Repeater ID="rptTicketsInPerformance" OnItemDataBound="rptTicketsInPerformance_ItemBound" runat="server">
 <ItemTemplate>
   <asp:CheckBox ID="cbticketSelect" runat="server" />
   <asp:Literal ID="ltticketDescription" runat="server" />
 </ItemTemplate>
 <FooterTemplate>
   <div class="change-buttons">
   <asp:LinkButton ID="btDonate" runat="server" CssClass="button-primary" Text="Donate"  OnClick="donateButton_click" />
   <asp:HyperLink ID="hlCancel" runat="server" CssClass="button-primary close-reveal-modal" Text="Cancel" />
   </div>
 </FooterTemplate>
</asp:Repeater>

代码背后

    protected void donateButton_click(object sender, System.EventArgs e)
    {
        RepeaterItem items = ((sender as LinkButton).Parent as RepeaterItem);
        foreach(var itm in items.Controls)
        {
            if(itm is CheckBox)
            {
              // Do something here
            }
        }
     }

Answer 1

您可以循环所有Repeater项并使用FindControl在每个项中定位CheckBox。

protected void donateButton_Click(object sender, EventArgs e)
{
    string checkedBoxes = "";

    foreach (RepeaterItem item in rptTicketsInPerformance.Items)
    {
        CheckBox cb = item.FindControl("cbticketSelect") as CheckBox;
        checkedBoxes += cb.Checked.ToString() + ", ";
    }

    Label1.Text = checkedBoxes;
}

Answer 2

您应该注意sender 的Parent 实际上是Repeater，而不是Repeater 项。

所以，你应该指向

sender.Parent.Items

然后遍历这些，找到CheckBox。

Answer 3

试试这个FindControl:

protected void donateButton_click(object sender, System.EventArgs e)
{
    RepeaterItem items = ((sender as LinkButton).Parent as RepeaterItem);
    foreach (RepeaterItem itm in items.Controls)
    {
        CheckBox chk = (CheckBox)itm.FindControl("cbticketSelect");

        if (chk.Checked)
        {
            Lable1.Text = "Do something ";
            // Do something here
        }
    }
}