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อยากทราบวิธีดึงข้อมูลจาก database โดยการ loop ครับ (C#) |
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Code (C#)
sql = "SELECT A.[year],A.id_oper_unit,A.id_department,A.io,A.id_position,"+
"SUM(A.head_count) AS hc,SUM (A.month1)AS month1,SUM(A.month2) AS month2,"+
"SUM(A.month3) AS month3,SUM(A.month4) AS month4,SUM(A.month5) AS month5,"+
"SUM(A.month6) AS month6,SUM(A.month7) AS month7,SUM(A.month8) AS month8,"+
"SUM(A.month9) AS month9,SUM(A.month10) AS month10,SUM(A.month11) AS month11,"+
"SUM(A.month12) AS month12 "+
"FROM Manpower_Temp A "+
"GROUP BY A.[year],A.id_oper_unit,A.id_department,A.io,A.id_position";
Tag : .NET
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| Date :
2017-05-22 09:34:21 |
By :
kenghockey |
View :
820 |
Reply :
2 |
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1) MSSQL ลองดุนี่ครับ https://www.dotnetperls.com/sqldatareader
Code (C#)
string connectionString = ConsoleApplication1.Properties.Settings.Default.ConnectionString;
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
string sql = "SELECT * FROM Dogs1";
using (SqlCommand command = new SqlCommand(sql, connection))
{
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
int weight = reader.GetInt32(0); // Weight int
string name = reader.GetString(1); // Name string
string breed = reader.GetString(2); // Breed string
Console.WriteLine("Weight = {0}, Name = {1}, Breed = {2}", weight, name, breed);
}
}
}
2) MySQL
Code (C#)
string sql = "SELECT * FROM Dogs1";
MySqlCommand cmd = new MySqlCommand(sql, connection);
MySqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
int weight = reader.GetInt32(0); // Weight int
string name = reader.GetString(1); // Name string
string breed = reader.GetString(2); // Breed string
Console.WriteLine("Weight = {0}, Name = {1}, Breed = {2}", weight, name, breed);
}
//connection.Close();
reader.Dispose();
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| Date :
2017-05-23 02:13:08 |
By :
ccjpn |
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ในบทความก็มีอยู่นะครับ พวก DataSet, DataTable, DataRader ทำได้หมดครับ 
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| Date :
2017-05-23 05:51:12 |
By :
mr.win |
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