Database 数据库条目未完成

这是我的连接成功的代码，同时也显示了插入的查询消息，但无法在我的数据库中获取条目。

请尝试下面的代码

try
{
    // Data Source=FAHAD-PC\SQLEXPRESS;Initial Catalog="Student management";Integrated Security=True
    // server=FAHAD-PC\\SQLEXPRESS;database=Student management;

    String str = "Data Source=FAHAD-PC\\SQLEXPRESS;Initial Catalog=Student management;Integrated Security=True;";
    String query = "Insert into Users (Username, Password) values('usern' , 'userpassword');";
    SqlConnection con = new SqlConnection(str);
    SqlCommand cmd = new SqlCommand(query, con);



    con.Open();
    DataSet ds = new DataSet();
    MessageBox.Show("connect with sql server");

    con.Close();

    MessageBox.Show("Inserted sucessfully");
    usern = " ";
    userpassword = " ";
}
catch (Exception err) 
{
    MessageBox.Show(err.Message);
}

---

cmd

需要

。执行

'dQuery被插入，但另一个问题变成了String query=“插入用户（用户名、密码）值（'usern'，'userpassword'）；”；usern和userpasswrod是通过文本框插入的变量。string usern=uname.text；字符串userpassword=upass.Text；在数据库中，usern和userpassword被插入到每个EntryConcat用户名和密码到sql查询中。如何将图片从用户添加到桌面应用程序的图片框中

try
{
    // Data Source=FAHAD-PC\SQLEXPRESS;Initial Catalog="Student management";Integrated Security=True
    // server=FAHAD-PC\\SQLEXPRESS;database=Student management;

    String str = "Data Source=FAHAD-PC\\SQLEXPRESS;Initial Catalog=Student management;Integrated Security=True;";
    String query = "Insert into Users (Username, Password) values('usern' , 'userpassword');";
    SqlConnection con = new SqlConnection(str);
    SqlCommand cmd = new SqlCommand(query, con);



    con.Open();
    cmd.ExecuteNonQuery();

    MessageBox.Show("connect with sql server");

    con.Close();

    MessageBox.Show("Inserted sucessfully");
    usern = " ";
    userpassword = " ";
}
catch (Exception err) 
{
    MessageBox.Show(err.Message);
}