使用C#在asp.net中的下拉列表 [英] dropdown list in asp.net using C#

问题描述

我确实使用了下拉列表并从数据库进行绑定.
我想将选定的索引设置为零，例如---------选择一些值-----------

I did use dropdown list and bind from data base.
I want to set selected index zero as like ---------select some value-----------

推荐答案

设置下拉属性AppendDataBoundItems="true"
样本语法

Set dropdown property AppendDataBoundItems="true"
Sample Syntax

<asp:dropdownlist appenddatabounditems="true" id="DropDownList1" runat="server"> <br />
        <asp:listitem selected="True" value="0"><br />
                     Select<br />
         </asp:listitem><br />
        </asp:dropdownlist>

精彩视频- http://www.youtube.com/watch?v = RXGfqsbbX20 [ ^ ].

一些链接-
http://www.w3schools.com/aspnet/control_dropdownlist.asp [ http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/DropDown/DropDown.aspx [ ^ ]

要显示默认值，您只需向数据库返回的数据集添加另一个值.

A good video - http://www.youtube.com/watch?v=RXGfqsbbX20[^].

Some links -
http://www.w3schools.com/aspnet/control_dropdownlist.asp[^]
http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/DropDown/DropDown.aspx[^]

To show a default value, you can just add another value to the dataset that is returned from the db.

try this,

ddlselectproject.Items.Insert(0,new ListItem("...select...","0");

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