一：C#连接SQL数据库
DataSource=myServerAddress;InitialCatalog=myDataBase;UserId=myUsername;Password=myPassword;
DataSource=190.190.200.100,1433;NetworkLibrary=DBMSSOCN;InitialCatalog=myDataBase;UserID=myUsername;Password=myPassword;
Server=myServerAddress;Database=myDataBase;UserID=myUsername;Password=myPassword;
Trusted_Connection=False;
Server=myServerAddress;Database=myDataBase;Trusted_Connection=True;
Server=myServerNametheInstanceName;Database=myDataBase;Trusted_Connection=True;
DataSource=myServerAddress;Initial Catalog=myDataBase;IntegratedSecurity=SSPI;
1:Integrated Security参数
当设置Integrated Security为 True 的时候，连接语句前面的UserID, PW是不起作用的，即采用windows身份验证模式。
只有设置为 False 或省略该项的时候，才按照 UserID, PW 来连接。
IntegratedSecurity 还可以设置为：sspi,相当于True,建议用这个代替True.
DataSource=myServerAddress;Initial Catalog=myDataBase;IntegratedSecurity=SSPI;
DataSource=myServerAddress;Initial Catalog=myDataBase;IntegratedSecurity=true;
DataSource=myServerAddress;InitialCatalog=myDataBase;;UserID=myUsername;
Password=myPasswordIntegratedSecurity=false;
2:参数Trusted_Connection
Trusted_Connection=true,将使用当前的 Windows 帐户凭据进行身份验证
Trusted_Connection=false;将不采用信任连接方式(也即不采用Windows验证方式)，而改由SQL Server2000验证方式
Server=myServerAddress;Database=myDataBase;UserID=myUsername;
Password=myPassword;Trusted_Connection=false;
Server=myServerAddress;Database=myDataBase;Trusted_Connection=True;
3:Initial Catalog是你要连接的数据库的名字
4:WINCE连接
DataSource=myServerAddress;Initial Catalog=myDataBase;IntegratedSecurity=SSPI;UserID=myDomainmyUsername;Password=myPassword;
二：可以利用SqlConnectionStringBuilder,这样不必去记住名称。
SqlConnectionStringBuilder scsb = new SqlConnectionStringBuilder();
scsb.DataSource =@"(local)SQLExpress";
scsb.IntegratedSecurity = true;
scsb.InitialCatalog = "Northwind";
SqlConnectionmyConnection = new SqlConnection(scsb.ConnectionString);
三：可以利用属性中的Setting来自动设置连接字符串
1:在type中选择(connection string)，
2:在DataSouce中选择数据源，然后再Server中输入服务器名，本地用(local)SQLExpress
3:选择登陆验证方式，本次选Windows验证(即信任连接IntegratedSecurity=True)
4:选择数据库名，确认即可
DataSource=(local)SQLExpress;Initial Catalog=Northwind;IntegratedSecurity=True
server =.sqlexpress;integrated security = true;database = northwind
最后附上一个我自己的测试用例：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.SqlClient;
namespace ConnectDB
{
class Program
{
static void Main(string[] args)
{
SqlConnection sqlCon = new SqlConnection();
sqlCon.ConnectionString = "Data Source=ServerName;InitialCatalog=DatabaseName;Integrated Security=SSPI";
sqlCon.Open();
SqlCommand sql_Command = new SqlCommand();
sql_Command.CommandText = "Query Text";
sql_Command.Connection = sqlCon;
SqlDataAdapter dbAdapter = new SqlDataAdapter(sql_Command);
DataSet dbSet = new DataSet();
dbAdapter.Fill(dbSet);
//dbSet.GetXml();
Console.WriteLine(dbSet.GetXml()。ToString());
sqlCon.Close();
Console.Read();
}
}
}
