如何在 C# 中使下拉列表只读
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How to make Dropdownlist readonly in C#
提问by Rajan Vachhani
I am using
我在用
TextBox.ReadOnly = false;
for readonly.
只读。
How can i fix it on DropDownList?
我如何在 DropDownList 上修复它？
I use Enabled = falseproperties like...
我使用Enabled = false属性，例如...
TextBox.Enabled = false;
DropDownList.Enabled = false;
but, after that css class not call in this both control at run-time.
但是，在那之后 css 类不在运行时调用这两个控件。
Please give me any properties like "ReadOnly".
请给我任何属性，如“只读”。
采纳答案by Carlos Landeras
There is no readonly property for DropDownListin asp.net
DropDownListasp.net 中没有 readonly 属性
Try using:
尝试使用：
<asp:DropDownList ID="DropDownList1" runat="server" Enabled="False">
</asp:DropDownList>
Or change it at runtime:
或者在运行时更改它：
DropDownList1.Enabled=false;
and change it's css class as well.
并更改它的 css 类。
DropDownList1.CssClass = "class";
回答by Satinder singh
回答by sagar
Use a panel as with Enabled="false"and put your control inside:
使用与Enabled="false"一样的面板并将您的控件放在里面：
<asp:Panel ID="pnlname" runat="server" Enabled="false">
<asp:DropDownList ID="DropDownList1" runat="server">
</asp:DropDownList>
</asp:Panel>
回答by Himalaya Garg
As disabled dropdownlist data cannot be read in postback. So as a workaround do not disable it, but first clear dropdownlist and then bind only already selected item.
由于无法在回发中读取禁用的下拉列表数据。因此，作为一种解决方法，不要禁用它，而是先清除下拉列表，然后仅绑定已选择的项目。
ListItem item = DropDownList.SelectedItem;
DropDownList.Items.Clear();
DropDownList.Items.Add(item);
