public void ReadMyData(string myConnString) {
string mySelectQuery = "SELECT OrderID, CustomerID FROM Orders";
SqlConnection myConnection = new SqlConnection(myConnString);
SqlCommand myCommand = new SqlCommand(mySelectQuery,myConnection);
myConnection.Open();
SqlDataReader myReader;
myReader = myCommand.ExecuteReader();
// Always call Read before accessing data.
while (myReader.Read()) {
Console.WriteLine(myReader.GetInt32(0) + ", " + myReader.GetString(1));
}
// always call Close when done reading.
myReader.Close();
// Close the connection when done with it.
myConnection.Close();
}
orSqlCommand.ExecuteScalar
ms-help://MS.VSCC/MS.MSDNVS.2052/cpref/html/frlrfsystemdatasqlclientsqlcommandclassexecutescalartopic.htm
string mySelectQuery = "SELECT OrderID, CustomerID FROM Orders";
SqlConnection myConnection = new SqlConnection(myConnString);
SqlCommand myCommand = new SqlCommand(mySelectQuery,myConnection);
myConnection.Open();
SqlDataReader myReader;
myReader = myCommand.ExecuteReader();
// Always call Read before accessing data.
while (myReader.Read()) {
Console.WriteLine(myReader.GetInt32(0) + ", " + myReader.GetString(1));
}
// always call Close when done reading.
myReader.Close();
// Close the connection when done with it.
myConnection.Close();
}
orSqlCommand.ExecuteScalar
ms-help://MS.VSCC/MS.MSDNVS.2052/cpref/html/frlrfsystemdatasqlclientsqlcommandclassexecutescalartopic.htm
string name=myreader["name"].ToString();//其中myreader是datareader
String str="sever=@your sever name;uid=@your uid;psw=@your psw;database=@your database;";这个字符串用来指定访问信息。你根据你的机器来设定各个参数
SqlConnection conn=new SqlConnection(str),这样你就可以建立一个连接
然后你可以声明一个数据适配器,做一个数据集,等等
建议你看一下有关ado.net方面的书或者看你的帮助中的system.data命名空间