DataTable omgezet naar een <Model>generiek klassevoorbeeld van List

Klein tuig · Geplaatst op 22-04-2015 09:09:58

[DBHelp] gebruikt reflectietechnologie om objecten in lijsten te verpakken
http://www.itsvse.com/thread-1848-1-1.html
(Bron: Wuhan Software Engineering Beroepscollege)

Originele link:

DBhelp.cs code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.SqlClient;
using System.Reflection;
using System.Data;
namespace TestList
{
public class DBhelp
{
private static string strConn = "server=.;database=testlist;integrated security=true";
//得到一个DataTable
public static DataTable getTable(string strSql)
{
SqlConnection sqlConn = new SqlConnection(strConn);
SqlDataAdapter sqlDA = new SqlDataAdapter(strSql, sqlConn);
DataTable dt = new DataTable();
sqlDA.Fill(dt);
return dt;
}
//增删改
public static void upDateDB(string strSql)
{
SqlConnection sqlConn = new SqlConnection(strConn);
SqlCommand sqlComm = new SqlCommand(strSql, sqlConn);
sqlConn.Open();
sqlComm.ExecuteNonQuery();
sqlConn.Close();
}
//得到一个list<T>
public static List<T> getList<T>(string strSql)
{
//委托的实例化,指向packBean方法
//PackageBean packageBean = new PackageBean(packBean);
List<T> list = new List<T>();
SqlConnection sqlConn = new SqlConnection(strConn);
SqlCommand sqlComm = new SqlCommand(strSql, sqlConn);
sqlConn.Open();
SqlDataReader sqlDR = sqlComm.ExecuteReader();
while (sqlDR.Read())
{
//得到T的类型
Type t = typeof(T); ;
//查看类中的属性：
PropertyInfo[] pis = t.GetProperties();
// 用反射生成对象
T model = Activator.CreateInstance<T>();
foreach (PropertyInfo pi in pis)
{
if (pi != null)
{
//取得特定字段并赋值
pi.SetValue(model, sqlDR[pi.Name].ToString(), null);
}
}
list.Add(model);
}
sqlConn.Close();
return list;
}
}
}

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stuinfo.cs Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace TestList
{
public class stuinfo
{
public string id { get; set; }
public string name { get; set; }
public string age { get; set; }
public string live { get; set; }
}
}

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test.asp Code:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="test.aspx.cs" Inherits="TestList.test" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:BoundField DataField="id" HeaderText="id" />
<asp:BoundField DataField="name" HeaderText="name" />
<asp:BoundField DataField="age" HeaderText="age" />
<asp:BoundField DataField="live" HeaderText="live" />
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>

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test.asp.cs code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace TestList
{
public partial class test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack) {
List<stuinfo> stu=DBhelp.getList<stuinfo>("select * from stuinfo");
GridView1.DataSource = stu;
GridView1.DataBind();
}
}
}
}

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SQL-database:

create database testlist
go
use testlist
go
create table stuinfo
(
id int primary key identity(1,1),
name varchar(5) not null,
age int not null,
live varchar(20) not null
)
go
insert into stuinfo values('东方','45','地方')
insert into stuinfo values('当初','47','发多个地方')
insert into stuinfo values('并不','2','的方式的水电费')
insert into stuinfo values('学校','11','的师傅的说法')
insert into stuinfo values('形成','87','的释放速度')
insert into stuinfo values('自行','45','士大夫似')
select * from stuinfo

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Gecomprimeerd pakket downloaden:

TestList.rar (26.89 KB, Aantal downloads: 0, Verkoopprijs: 1 Grain MB)

[ASP.NET] DataTable omgezet naar een <Model>generiek klassevoorbeeld van List

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