Question

当我执行radiobuttonclick时，我想将dropdownlist设置为可见。 radiobutton和dropdownlist位于同一datagrid内。我不知道该怎么做。

<asp:UpdatePanel ID="updatepanel" UpdateMode="conditional" runat="server">
    <ContentTemplate>
        <asp:DataGrid ID="DataGrid" AutoGenerateColumns = "false" CssClass="objectSubTitle" ItemStyle-Wrap="true" runat="server" OnItemCommand="handler" ><Columns>
            <asp:TemplateColumn>
                <ItemTemplate>
                   <asp:RadioButton ID ="RadioButton1" Text="Yes" GroupName="creatingNewCard" OnCheckedChanged="RadioButtonYes" AutoPostBack="True" runat="server" />
                  <asp:DropDownList ID="DropDownList1"  Visible="false" runat="server"/>
                </ItemTemplate>
            </asp:TemplateColumn>

Answer 1

假设它们位于ItemTemplate的{{1}}，并且您希望在服务器端切换活动：

TemplateField

采样的GridView：

protected void RbCheckedChanged(Object sender, EventArgs e)
{
    var radioButton1 = (RadioButton)sender;
    var row = (GridViewRow)radioButton1.NamingContainer;
    var dropDownList1 = (DropDownList)row.FindControl("DropDownList1");
    dropDownList1.Visible = radioButton1.Checked;
}

修改：由于您已编辑问题以表明您确实使用的是<asp:GridView ID="GridView1" AutoGenerateColumns="false" OnRowDataBound="Grid_RowDataBound" runat="server"> <Columns> <asp:TemplateField> <ItemTemplate> <asp:DropDownList ID="DropDownList1" runat="server"></asp:DropDownList> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <ItemTemplate> <asp:RadioButton ID="RadioButton1" runat="server" OnCheckedChanged="RbCheckedChanged" AutoPostBack="true"></asp:RadioButton> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView>而不是DataGrid，因此代码类似：

GridView

Answer 2

您可以在单选按钮中调用DropdwonList的Visible属性检查已更改的事件，如下所示

protected void RadioButton1_CheckedChanged(Object sender, EventArgs e)
{
    var radioButton1= (RadioButton)sender;
    var item = (DataGridItem)radioButton1.NamingContainer;
    var dropDownList1 = (DropDownList)item.FindControl("DropDownList1");

    dropDownList1.Visible = radioButton1.Checked ? true : false;
}

单击RadioButton使DropdownList可见

2 个答案: