Can anybody give an example for executing a T-SQL statement using C#?
+3
A:
I suggest that you start with an ADO.NET turorial like this one
http://www.csharp-station.com/Tutorials/AdoDotNet/Lesson01.aspx
How to use SQLCommand
http://www.csharp-station.com/Tutorials/AdoDotNet/Lesson03.aspx
pjp
2009-08-11 10:56:48
+4
A:
Do you mean something like this:
private static void ReadOrderData(string connectionString)
{
string commandText = "SELECT OrderID, CustomerID FROM dbo.Orders;";
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand command = new SqlCommand(commandText, connection))
{
connection.Open();
using (SqlDataReader reader = command.ExecuteReader())
{
while (reader.Read())
{
Console.WriteLine(String.Format("{0}, {1}",
reader[0], reader[1]));
}
}
}
}
}
Or, perhaps something like:
static public int AddProductCategory(string newName, string connString)
{
Int32 newProdID = 0;
string sql =
"INSERT INTO Production.ProductCategory (Name) VALUES (@Name); "
+ "SELECT CAST(scope_identity() AS int)";
using (SqlConnection conn = new SqlConnection(connString))
{
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.Add("@Name", SqlDbType.VarChar);
cmd.Parameters["@name"].Value = newName;
try
{
conn.Open();
newProdID = (Int32)cmd.ExecuteScalar();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
return (int)newProdID;
}
Source: MSDN
Magnus Johansson
2009-08-11 10:58:27
A:
Using a reader:
SqlConnection MSSQLConn = new SqlConnection("your connection string");
MSSQLConn.Open();
SqlCommand MSSQLSelectConsignment = new SqlCommand();
MSSQLSelectConsignment.CommandText = "select * from yourtable where blah = @blah";
MSSQLSelectConsignment.Parameters.AddWithValue("@blah", somestring);
MSSQLSelectConsignment.Connection = MSSQLConnOLD;
SqlDataReader reader = MSSQLSelectConsignment.ExecuteReader();
while (reader.Read())
{
...
}
To bring back a single value:
MSSQLSelectConsignment.CommandText = "select fieldname from yourtable where blah = @blah";
string yourstring = MSSQLSelectConsignment.ExecuteScalar().ToString();
or to bring back number of rows affected for updates etc:
MSSQLSelectConsignment.CommandText = "update yourtable set yourfield = 0 where blah = @blah";
int yourint = MSSQLSelectConsignment.ExecuteNonQuery();
Hope helps :)
Tikeb
2009-08-11 11:05:58
Bad example. You're leaking resources.
Will
2009-08-11 11:10:43
it was just a quick write up, I'm always willing to learn how to improve my code. I didn't add any close/dispose statements I realise which I normally do
Tikeb
2009-08-11 11:23:23
you should do that here. Parameters are good, however.
Will
2009-08-11 12:36:06