标签:style blog http java color strong
1.想要DropDownList自动提交必须设置AutoPostBack="true"属性,下面是代码:
<asp:DropDownList ID="ddlNameList" runat="Server" Height="30" AutoPostBack="True" onselectedindexchanged="ddlNameList_SelectedIndexChanged" ></asp:DropDownList>
2.在服务端处理的时候,尤其是初始化DropDownList的时候,没注意结果写错了,下面是错误代码:
protected void Page_Load(object sender, EventArgs e) { if (!Page.IsCallBack) { this.fillIntoNameList(); } }
这个初始化判断出错了,每次传到服务器的时候会初始化一次,这就导致每次获取DropDownList的SelectIndex的时候只能是0
正确代码,如下:
protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { this.fillIntoNameList(); } }
DropDownList获取的SelectIndex一直为0,布布扣,bubuko.com
DropDownList获取的SelectIndex一直为0
标签:style blog http java color strong
原文地址:http://www.cnblogs.com/aocshallo/p/3770117.html