我需要在下拉列表中添加禁用字段“选择...”。数据与后面代码中的数据源绑定。我尝试添加禁用字段,但我可以看到任何结果。
AvailableRolesList = RoleDefinationRelay.GetAllRoles(null);
ddlRolesList.DataSource = AvailableRolesList;
ddlRolesList.DataTextField = "Title";
ddlRolesList.DataValueField = "RoleID";
ddlRolesList.DataBind();
<asp:DropDownList ID="ddlRolesList" runat="server">
<asp:ListItem Text="SelectRole" Enabled="false" Selected="True">Select Role</asp:ListItem>
</asp:DropDownList>
在后面的代码中绑定下拉列表后,需要添加Select项。
AvailableRolesList = RoleDefinationRelay.GetAllRoles(null);
ddlRolesList.DataSource = AvailableRolesList;
ddlRolesList.DataTextField = "Title";
ddlRolesList.DataValueField = "RoleID";
ddlRolesList.DataBind();
ddlRolesList.Items.Insert(0, "Select Role");
这是我的答案
ddlRolesList.Items.Insert(0, new ListItem("Select Role","NA"));