将SQL数据库连接到c#
本文关键字:数据库连接 SQL | 更新日期: 2023-09-27 18:16:37
我有一个小问题与SQL,它说"公共Form1();在代码的最顶部,根据我所遵循的初学者指南,应该有一个带有3个点的小框(就像这样[…]),而不是";"
public Form1();
System.Data.SqlClient.SqlConnection con;
private void Form1_Load(object sender, EventArgs e)
{
con = new System.Data.SqlClient.SqlConnection();
con.ConnectionString="Data Source=.''SQLEXPRESS;AttachDbFilename=C:''Users''Wee Jimmy''Documents''MyWorkers.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";
con.Open();
MessageBox.Show("Open");
con.Close();
MessageBox.Show("Closed");
谁来帮帮我,我已经准备认输了。错误提示:错误1 'SQL_Connection.Form1.Form1()'必须声明一个主体,因为它没有标记为抽象、extern或部分c:'用户' Jimmy'Documents'Visual Studio 2010'Projects'SQL Connection'SQL Connection'Form1.cs 15 16 SQL Connection
改变第一行:
public Form1();
:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
}
试试这个——
public Form1()
{
System.Data.SqlClient.SqlConnection con;
private void Form1_Load(object sender, EventArgs e)
{
con = new System.Data.SqlClient.SqlConnection();
con.ConnectionString="Data Source=.''SQLEXPRESS;AttachDbFilename=C:''Users''Wee Jimmy''Documents''MyWorkers.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";
con.Open();
MessageBox.Show("Open");
con.Close();
MessageBox.Show("Closed");
}
}