Question

我有一个嵌套的转发器和一个内部的复选框，像这样

<asp:Repeater ID="rptInterestCategory" runat="server" OnItemDataBound="rptInterestCategory_ItemDataBound" >

    <ItemTemplate> 
        <asp:Repeater ID="rptInterests" runat="server" OnItemDataBound="rptInterests_ItemDataBound">
            <ItemTemplate>
                <asp:CheckBox ID="cbInterest" runat="server" OnCheckedChanged="cbInterest_CheckedChanged" Data-Id='<%# DataBinder.Eval(Container.DataItem, "id") %>' Text='<%# DataBinder.Eval(Container.DataItem, "name") %>' />

            </ItemTemplate>
        </asp:Repeater>
        <hr/>
    </ItemTemplate>
</asp:Repeater>

我在此转发器外面有按钮，在此按钮单击事件我想要获取该复选框的所有值。我尝试过这样的事情，

 protected void btnSave_Click(object sender, EventArgs e)
    {
        foreach (RepeaterItem repeated in rptInterestCategory.Items)
        {
            var rptInterests = (Repeater)FindControlRecursive(repeated, "rptInterests");
            foreach (RepeaterItem repeatedInterest in rptInterests.Items)
            {
                var cbInterest = (CheckBox)FindControlRecursive(repeated, "cbInterest");

                if (cbInterest.Checked)
                {
                    name = cbInterest.Text;
                }
            }
        }
}
 public static Control FindControlRecursive(Control root, string id)
    {
        if (root.ID == id)
            return root;

        return root.Controls.Cast<Control>()
            .Select(c => FindControlRecursive(c, id))
            .FirstOrDefault(c => c != null);
    }

现在的问题是，这段代码总是只找到第一个CheckBox，所以我得到重复的值。有没有办法循环每个复选框并找到正确的值？

Answer 1

为此，你必须在循环中定义一个字符串或字符串数组。
在这个答案中，我在一个字符串中给出解决方案。在String s中，您将获得所有选中的复选框值，单独的符号为^
在button_click上输入我的代码，您将获得所有选定的CheckBox值。

string s = "";
            foreach (RepeaterItem item in rptInterestCategory.Items)
            {
                if (item.ItemType == ListItemType.Item || item.ItemType == ListItemType.AlternatingItem)
                {
                    Repeater dl = (Repeater)item.FindControl("rptInterests");
                    foreach (RepeaterItem dli in repeatedInterest.Items)
                    {
                        if (dli.ItemType == ListItemType.Item || dli.ItemType == ListItemType.AlternatingItem)
                        {
                            var checkBox = (CheckBox)dli.FindControl("cbInterest");
                            if (checkBox.Checked) { s += (s == "") ? checkBox.Text : "^" + checkBox.Text; }

                        }
                    }
                }
            }

Answer 2

使用与外部循环相同的参数在内部循环中调用FindControlRecursive。那是问题吗？

var cbInterest = (CheckBox)FindControlRecursive(repeatedInterest , "cbInterest");

完整代码：

protected void btnSave_Click(object sender, EventArgs e)
{
    foreach (RepeaterItem repeated in rptInterestCategory.Items)
    {
        var rptInterests = (Repeater)FindControlRecursive(repeated, "rptInterests");
        foreach (RepeaterItem repeatedInterest in rptInterests.Items)
        {
            var cbInterest = (CheckBox)FindControlRecursive(repeatedInterest , "cbInterest");

            if (cbInterest.Checked)
            {
                name = cbInterest.Text;
            }
        }
    }

}

无法在嵌套转发器中找到CheckBox

2 个答案: