Question

conn.ConnectionString c#连接sdf数据库的连接字符串如何写啊？

conn.ConnectionString = "Provider=Microsoft.SQL.Server.4.0;NET Framework:database password=ak47;Data Source=//text.sdf" ;
报的错是 未在本地计算机上注册“Microsoft.SQL.Server.4.0”提供程序

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlServerCe; //这里是重点，要有驱动

namespace testc
{
public partial class Form1 : Form
{
SqlCeConnection sqlceCon = new SqlCeConnection();
SqlCeCommand sqlCeCom = new SqlCeCommand();
DataTable dt = new DataTable();

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
sqlceCon = new SqlCeConnection("Data Source=C:\\Program Files\\Microsoft SQL Server Compact Edition\\v3.5\\Samples\\Northwind.sdf");
sqlceCon.Open();

SqlCeDataAdapter adptrOdbc = new SqlCeDataAdapter("select * from customers", sqlceCon);
adptrOdbc.Fill(dt);

dataGridView1.DataSource = dt;
}
}
}

Answer 2

connectionString="Data Source=192.168.1.3;Initial Catalog=myDataBase;User Id=sa;Password=administrator"

追问

大哥连接的不是qsl服务 是本机文件啊