数据库连接+SQL语句+存储过程+ADO.Net调用存储过程

using System.Data;-----------Use ADO.net namespace
using System.Data.SqlClient;-------------Use SQL Server data provider namespace
使用SQLserver
@"Server=(local)\sqlexpress;Database=northwind;Integrated Security=True"
string connstr = @"Server=(local);UID=sa;PWD=123456;database=Northwind";

using System.Data;
using System.Data.OleDb;
使用OleDB(Access数据库)
@“Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\temp\nwind.mdb”

select * from zhanghu

insert into zhanghu (username,password) values ('ivor','gooooool')

update zhanghu set username='shirley',password='19841225'

where id=5

delete zhanghu where id=3

private string connstring = @"server=ZHANGZHE-78DA76\SQLEXPRESS;database=mycompany;integrated security=true";

create procedure GetAll
AS
select * from zhanghu
后台调用并显示在GridView上：使用了Dataset
SqlConnection conn = new SqlConnection(connstring);

conn.Open();

SqlDataAdapter adapter = new SqlDataAdapter();

adapter.SelectCommand = new SqlCommand("GetALL", conn);//没有这一行会出错，空引用

adapter.SelectCommand.CommandType = CommandType.StoredProcedure;

DataSet ds = new DataSet();

adapter.Fill(ds);

conn.Close();

GridView1.DataSource = ds;

GridView1.DataBind();

create procedure Getid
AS
select username from zhanghu where id=1
后台调用并显示在lable上：使用了SqlDataReader
SqlConnection conn = new SqlConnection(connstring);
conn.Open();

SqlCommand cmd = new SqlCommand("Getid", conn);

//SqlCommand cmd = new SqlCommand();
//cmd.Connection = conn;

cmd.CommandType = CommandType.StoredProcedure;

//cmd.CommandText = "Getid";
SqlDataReader dr = cmd.ExecuteReader();

while (dr.Read())

{

Label1.Text = dr["username"].ToString();

}

dr.Close();

conn.Close();
--------------带参数的存储过程

create procedure GetOneRecord
@num int
AS
select * from zhanghu where id=@num
后台调用并显示在GridView上：使用了Dataset带参数的存储过程
SqlConnection conn = new SqlConnection(connstring);

conn.Open();

SqlDataAdapter adapter = new SqlDataAdapter();

adapter.SelectCommand = new SqlCommand("GetOneRecord", conn);

adapter.SelectCommand.CommandType = CommandType.StoredProcedure;

adapter.SelectCommand.Parameters.Add(new SqlParameter("@num", SqlDbType.Int));

adapter.SelectCommand.Parameters["@num"].Value = 4;

DataSet ds = new DataSet();

adapter.Fill(ds);

conn.Close();

GridView1.DataSource = ds;

GridView1.DataBind();
------------------普通读取数据库
string sqlstr = "select * from zhanghu";

SqlConnection conn = new SqlConnection(connstring);

SqlCommand cmd = new SqlCommand(sqlstr, conn);

conn.Open();

SqlDataReader dr = cmd.ExecuteReader();

while (dr.Read())

{

Label1.Text += dr["username"].ToString();

}

dr.Close();

conn.Close();

参见C:\Program Files\ASP.NET Starter Kits\ASP.NET Portal (CSVS)\PortalCSVS\App_Code\Components\ContactsDB.cs例：
CREATE PROCEDURE Portal_AddContact

(

@ModuleID int,

@UserName nvarchar(100),

@Name nvarchar(50),

@Role nvarchar(100),

@Email nvarchar(100),

@Contact1 nvarchar(250),

@Contact2 nvarchar(250),

@ItemID int OUTPUT

)

AS
INSERT INTO Portal_Contacts

(

CreatedByUser,

CreatedDate,

ModuleID,

Name,

Role,

Email,

Contact1,

Contact2

)
VALUES

(

@UserName,

GetDate(),

@ModuleID,

@Name,

@Role,

@Email,

@Contact1,

@Contact2

)
SELECT

@ItemID = @@Identity

public int AddContact(int moduleId, int itemId, String userName, String name, String role, String email, String contact1, String contact2) {
if (userName.Length < 1) {

userName = "unknown";

}
// Create Instance of Connection and Command Object

SqlConnection myConnection = new SqlConnection(ConfigurationSettings.AppSettings["connectionString"]);

SqlCommand myCommand = new SqlCommand("Portal_AddContact", myConnection);
// Mark the Command as a SPROC

myCommand.CommandType = CommandType.StoredProcedure;
// Add Parameters to SPROC

SqlParameter parameterItemID = new SqlParameter("@ItemID", SqlDbType.Int, 4);

parameterItemID.Direction = ParameterDirection.Output;

myCommand.Parameters.Add(parameterItemID);
SqlParameter parameterModuleID = new SqlParameter("@ModuleID", SqlDbType.Int, 4);

parameterModuleID.Value = moduleId;

myCommand.Parameters.Add(parameterModuleID);
SqlParameter parameterUserName = new SqlParameter("@UserName", SqlDbType.NVarChar, 100);

parameterUserName.Value = userName;

myCommand.Parameters.Add(parameterUserName);
SqlParameter parameterName = new SqlParameter("@Name", SqlDbType.NVarChar, 100);

parameterName.Value = name;

myCommand.Parameters.Add(parameterName);
SqlParameter parameterRole = new SqlParameter("@Role", SqlDbType.NVarChar, 100);

parameterRole.Value = role;

myCommand.Parameters.Add(parameterRole);
SqlParameter parameterEmail = new SqlParameter("@Email", SqlDbType.NVarChar, 100);

parameterEmail.Value = email;

myCommand.Parameters.Add(parameterEmail);
SqlParameter parameterContact1 = new SqlParameter("@Contact1", SqlDbType.NVarChar, 100);

parameterContact1.Value = contact1;

myCommand.Parameters.Add(parameterContact1);
SqlParameter parameterContact2 = new SqlParameter("@Contact2", SqlDbType.NVarChar, 100);

parameterContact2.Value = contact2;

myCommand.Parameters.Add(parameterContact2);
myConnection.Open();

myCommand.ExecuteNonQuery();

myConnection.Close();
return (int)parameterItemID.Value;

}