使用存储过程操作数据库

添加数据：

--创建一个存储过程，向表中插入一条数据

create proc usp_insertintoTbClass

@className nvarchar(50),

@classDes nvarchar(100)

as

begin

insert into TbClass values( @ClassName,@classDes)

end

exec usp_insertintoTbClass @className='初一三班',@classDes='中班'

string constr=ConfigurationManager.ConnectionStrings["sql"].ConnectionString;

using(SqlConnection con=new SqlConnection(constr))

{

using(SqlCommand cmd=new SqlCommand("usp_insertintoTbClass",con))

{

cmd.CommandType=System.Data.CommandType.StoredProcedure;

cmd.Parameters.AddWithValue("@className",txtinsertname.Text.Trim());

cmd.Parameters.AddWithValue("@classDes",txtinsertdes.Text.Trim().Trim());

con.Open();

int r=cmd.ExecuteNonQuery();

MessageBox.Show("成功插入"+r+"条数据");

}

}

修改数据：

---创建一个存储过程来修改表中的数据

create proc usp_TbClass_updateclass

@ClassId int,

@ClassName nvarchar(50),

@ClassDescription nvarchar(100)

as

begin

update TbClass set ClassName=@ClassName,ClassDescription=@ClassDescription

where ClassId=@ClassId

end

exec usp_TbClass_updateclass 2,'高一四班','重点理科班'

//1:引用配置文件，创建链接字符串

string constr=ConfigurationManager.ConnectionStrings["sql"].ConnectionString;

//2：创建链接对象

using(SqlConnection con=new SqlConnection(constr))

{

//3：创建链接对象把存储过程作为一个参数语句传递给数据库对象

using(SqlCommand cmd=new SqlCommand("usp_TbClass_updateclass",con))

{

//4：将数据库对象设这为存储过程对象StoredProcedure

cmd.CommandType=System.Data.CommandType.StoredProcedure;

cmd.Parameters.AddWithValue("@ClassName",txtname.Text.Trim());

cmd.Parameters.AddWithValue("@ClassDescription",txtdsc.Text.Trim());

cmd.Parameters.AddWithValue("@ClassId",txtid.Text.Trim());

con.Open();

int r=cmd.ExecuteNonQuery();

MessageBox.Show("成功更改"+r+"条数据");

}

}

删除数据：

---创建一个存储过程删除表中的数据

create proc usp_TbClass_deleteclass

@ClassId int

as

begin

delete TbClass where ClassId=@ClassId

end

string constr=ConfigurationManager.ConnectionStrings["sql"].ConnectionString;

using(SqlConnection con=new SqlConnection(constr))

{

using(SqlCommand cmd=new SqlCommand("usp_TbClass_deleteclass",con))

{

cmd.CommandType=System.Data.CommandType.StoredProcedure;

cmd.Parameters.AddWithValue("@ClassId",txtdelet.Text.Trim());

con.Open();

int r=cmd.ExecuteNonQuery();

txtdelet.Clear();

if(r!=0)

{

MessageBox.Show("成功删除"+r+"条数据");

}

else

{

MessageBox.Show("您输入的班级编号不存在");

}

}

}

读取数据：

----创建一个存储过程查询表中的数据---------

create proc usp_selectTbClass

@classId int

as

begin

select * from TbClass where ClassId=@classId

end

private void button1_Click(objectsender,EventArgse)

{

string constr=ConfigurationManager.ConnectionStrings["sql"].ConnectionString;

SqlConnection con=new SqlConnection(constr);

using(SqlCommand cmd=new SqlCommand("usp_select TbClass",con))

{

con.Open();

cmd.CommandType=System.Data.CommandType.StoredProcedure;

cmd.Parameters.AddWithValue("@classId",txtclassid.Text.Trim());

//SqlParameter p1 = new SqlParameter("@className", SqlDbType.NVarChar);

//SqlParameter p2 = new SqlParameter("@classDes", SqlDbType.NVarChar);

//p1.Direction = ParameterDirection.Output;

//p2.Direction = ParameterDirection.Output;

//cmd.Parameters.Add(p1);

//cmd.Parameters.Add(p2);

using(SqlDataReader reader=cmd.ExecuteReader())

{

if(reader.HasRows)

{

while(reader.Read())

{

txtname.Text=reader.GetString(1);

txtdsc.Text=reader.GetString(2);

//txtname.Text = reader.GetString(0).ToString();

//txtdsc.Text = reader.GetString(1).ToString();

//cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);

MessageBox.Show("读取成功");

}

}

}

}

}