数据库连接字符串

时间:2016-08-24 02:28:43

标签: c# sql-server database visual-studio-2015

我只是尝试创建并写入数据库文件。

我不知道为什么连接字符串变成了这样:

Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\User\Documents\DATA_TEST.mdf;Integrated Security=True;Connect Timeout=30

使用此连接字符串,我收到此错误:

  

错误CS1009无法识别的转义序列
  XXX_DATABASE_TEST D:\ FOLDER \ XXX_DATABASE_TEST \ Form1.cs

所以我把“/”更改为“\”:

Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:/Users/User/Documents/DATA_TEST.mdf;Integrated Security=True;Connect Timeout=30

错误已经消失,表单加载,但数据库为空,不写入。你能帮我解决一下,我在这里做错了什么:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;

namespace XXX_DATABASE_TEST
{
    public partial class Form1 : Form
    {
        SqlCommand cmd;
        SqlConnection con;
        SqlDataAdapter da;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            con = new SqlConnection("Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\User\Documents\DATA_TEST.mdf;Integrated Security=True;Connect Timeout=30");

            con.Open();

            cmd = new SqlCommand("INSERT INTO testdata VALUES (Name, IDo, Gender) VALUES (@Name,@IDo,@Gender)", con);

            cmd.Parameters.Add("@Name", textBox1.Text);
            cmd.Parameters.Add("@IDo", textBox1.Text);
            cmd.Parameters.Add("@Gender", comboBox1.SelectedItem.ToString());

            cmd.ExecuteNonQuery();
        }
    }
}

0 个答案:

没有答案