create proc Pro_Login
(
@UserName nvarchar(10),
@PassWord nvarchar(10)
)
as
select * from [User] UserName=@UserName and PassWord=@PassWord

class ConnectionString
{
public static string conStr = "Data Source=MyLove-PC;Initial Catalog=data;Integrated Security=True";
}

#region
//連接數據庫配置字符串
using (SqlConnection con = new SqlConnection(ConnectionString.conStr))
{
con.Open();//打開數據庫
//調用存儲過程
using (SqlCommand cmd = new SqlCommand("Pro_Login", con))
{
//把文本框的值作為參數傳給存儲過程
cmd.Parameters.Add("@UserName", SqlDbType.VarChar, 10).Value = textBox1.Text.Trim();
cmd.Parameters.Add("@PassWord", SqlDbType.VarChar, 10).Value = textBox2.Text.Trim();
//通過存儲過程的方式執行
cmd.CommandType = CommandType.StoredProcedure;
//開始讀取數據
using (SqlDataReader dr = cmd.ExecuteReader())
{
//如果讀到用戶名和密碼，則調轉到界面Form2
if (dr.Read())
{
this.Hide();
Form2 f2 = new Form2();
f2.Show();
}
//否則，提示錯誤
else
{
MessageBox.Show("用戶名或者密碼錯誤", "請重新輸入", MessageBoxButtons.OK);
textBox1.Clear();
textBox2.Clear();
textBox1.Focus();
}
}
}
}
#endregion