c#添加了Configuration;后，竟然找不到 ConfigurationManager 这个类

c#添加了Configuration;后，竟然找不到 ConfigurationManager 这个类，后来才发现：虽然引用了using System.Configuration;这个包，但是还是不行的。

后来终于找到一个解决方法，就是在解决方案资源管理器里找到类文件选择“引用”，然后右击选择“添加引用”，并且从 .net 中找到

System.Configuration把它加上去就OK啦，本人是在最近找到

[csharp] view plaincopyprint?

实例：DataGridView显示数据

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using DevExpress.XtraEditors;

using System.Data.SqlClient;

using System.Configuration;

namespace WindowsApplication1

{

public partial class XtraForm1 : DevExpress.XtraEditors.XtraForm

{

public XtraForm1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

string customers = "select * from Customers";

using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["northwind"].ConnectionString))

{

DataSet dt = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(customers, con);

da.Fill(dt, "Customers");

dataGridView1.AutoGenerateColumns = true;

dataGridView1.DataSource = dt;

dataGridView1.DataMember = "Customers";

}

}

}

}