Question

<ul class="ulGroup" runat="server" id="ulGroup">
    <li>
        <input type="radio" name="grouptype" id="rdGroup1" class="css-checkbox" value="Group 1" checked="checked" runat="server" />
        <label for="rdGroup1" class="css-label radGroup1">Group 1</label>
    </li>
    <li>
        <input type="radio" name="grouptype" id="rdGroup2" class="css-checkbox" value="Group 2" runat="server" />
        <label for="rdGroup2" class="css-label radGroup1">Group 2</label>
    </li>
    <li>
        <input type="radio" name="grouptype" id="rdGroup3" class="css-checkbox" value="Group 3" runat="server" />
        <label for="rdGroup3" class="css-label radGroup1">Group 3</label>
    </li>
    <li>
        <input type="radio" name="grouptype" id="rdGroup4" class="css-checkbox" value="Group 4" runat="server" />
        <label for="rdGroup4" class="css-label radGroup1">Group 4</label>
    </li>
</ul>

如何检索从代码隐藏中选择的li单选按钮。

当我运行代码时，出现以下错误：

Parser Error Message: Cannot create an object of type 'System.Boolean' from its string representation 'checked' for the 'Checked' property.

using (SqlConnection sc = new SqlConnection(gloString))
{
    using (SqlCommand qSave = new SqlCommand())
    {
        qSave.Connection = sc;
        qSave.CommandType = CommandType.Text;
        qSave.CommandText = @"INSERT INTO [db1].[dbo].[tbl1] (FirstName, LastName, EmailAddress, UN, UP, DietGroup) VALUES (@FirstName, @LastName, @EmailAddress, @UN, @UP, @DietGroup)";
        qSave.Parameters.AddWithValue("@FirstName", txtFirst.Value);
        qSave.Parameters.AddWithValue("@LastName", txtLast.Value);
        qSave.Parameters.AddWithValue("@EmailAddress", txtEmail.Value);
        qSave.Parameters.AddWithValue("@UN", txtUser.Value);
        qSave.Parameters.AddWithValue("@UP", txtPass.Value);
        qSave.Parameters.AddWithValue("@DietGroup", rdGroup1.Checked); //Instead of rdGroup1.Checked, I would like to get which of the four radio is checked
    }
}

Answer 1

您应该使用此标记而不是您的标记

<asp:RadioButtonList ID="ulGroup" runat="server">
    <asp:ListItem Text="Group 1" Value="Group 1" Selected="True"/>
    <asp:ListItem Text="Group 2" Value="Group 2" />
    <asp:ListItem Text="Group 3" Value="Group 3" />
    <asp:ListItem Text="Group 4" Value="Group 4" />
</asp:RadioButtonList>

并在你的代码中改变了这个

qSave.Parameters.AddWithValue("@DietGroup", rdGroup1.Checked);

到这个

qSave.Parameters.AddWithValue("@DietGroup", ulGroup.SelectedValue);

修改

如果您想维护自己的标记，只需将checked="checked"更改为checked="true"，同时添加下一个

using System.Web.UI.HtmlControls;

然后创建一个像这样的函数

public string getSelectedRadioButton() { string radioSelected = string.Empty; foreach (Control control in ulGroup.Controls) { if (control.GetType().Name.Equals("HtmlInputRadioButton") && (control as HtmlInputRadioButton).Checked) { radioSelected = (control as HtmlInputRadioButton).Value; break; } } return radioSelected; }

现在您可以通过这种方式获得所选

qSave.Parameters.AddWithValue("@DietGroup", getSelectedRadioButton());

如何检索LI中的哪个单选按钮被选中

1 个答案: