HTML
<body>
<form id="form1" runat="server">
<asp:Button runat="server" ID="a" OnClick="a_Click" Text="apd"/>
</form>
</body>
码
protected void a_Click(object sender,EventArgs e)
{
Response.Write(((Button)FindControl("a")).Text);
}
这段代码工作正常.
但是,这段代码:
HTML
<%@ Page Title="" Language="C#" MasterPageFile="~/Student/MasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Student_Default" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:Button runat="server" ID="a" OnClick="a_Click" Text="andj"/>
</asp:Content>
码
protected void a_Click(object sender, EventArgs e)
{
Response.Write(((Button)FindControl("a")).Text);
}
此代码无效并FindControl返回Null- 为什么会这样？
该FindControl方法适用于简单的页面,但在母版页中,它不起作用吗？
将ID a更改为ctl00_ContentPlaceHolder1_a- 如何找到控件？
var course = from b in DbModle.courses
where b.name == "test"
select b;
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("name", typeof(string)));
dt.Columns.Add(new DataColumn("id", typeof(int)));
foreach (var course1 in course_university)
{
dr = dt.NewRow();
dr[0] = course1.name;
dr[1] = course1.id;
dt.Rows.Add(dr);
}
我如何DataTable按身份排序？