1. 代码结果如下图所示：
????
2. TblPersonBll.cs中的代码：
????public
class
TblPersonBll
{
public
bool
IncAgeByAutoId(int
autoId)
{
TblPersonDal
dal=new
TblPersonDal();
return
dal.IncAgeByAutoId(autoId) >
0;
}
}
3. TblPersonDal.cs中的代码:
????public
class
TblPersonDal
{
public
int
IncAgeByAutoId(int
autoId)
{
string
sql
=
"update TblPerson set age=age+1 where [email protected]";
return
SqlHelper.ExcuteNonQuery(sql, CommandType.Text, new
SqlParameter("@id", autoId));
}
}
4. frmIncAge.cs中的代码：
????private
void
button1_Click(object
sender, EventArgs
e)
{
TblPersonBll
bll=new
TblPersonBll();
int
autoId
=
int.Parse(textBox1.Text.Trim());
if (bll.IncAgeByAutoId(autoId))
{
MessageBox.Show("ok!");
}
else
{
MessageBox.Show("not ok!");
}
}
5. SqlHelper.cs中的代码：
????public
static
class
SqlHelper
{
//获取连接字符串
private
static
string
conStr
=
ConfigurationManager.ConnectionStrings["mysqlserver"].ConnectionString;
///
<summary>
///
执行insert/delete/update方法
///
</summary>
///
<param name="sql"></param>
///
<param name="cmdType"></param>
///
<param name="pms"></param>
///
<returns></returns>
public
static
int
ExcuteNonQuery(string
sql, CommandType
cmdType, params
SqlParameter[] pms)
{
using (SqlConnection
con
=
new
SqlConnection(conStr))
{
using (SqlCommand
cmd
=
new
SqlCommand(sql, con))
{
cmd.CommandType
=
cmdType;
if (pms
!=
null)
{
cmd.Parameters.AddRange(pms);
}
con.Open();
return
cmd.ExecuteNonQuery();
}
}
}
///
<summary>
///
执行返回单个值方法
///
</summary>
///
<param name="sql"></param>
///
<param name="cmdType"></param>
///
<param name="pms"></param>
///
<returns></returns>
public
static
object
ExecuteScalar(string
sql, CommandType
cmdType, params
SqlParameter[] pms)
{
using (SqlConnection
con
=
new
SqlConnection(conStr))
{
using (SqlCommand
cmd
=
new
SqlCommand(sql, con))
{
cmd.CommandType
=
cmdType;
if (pms
!=
null)
{
cmd.Parameters.AddRange(pms);
}
con.Open();
return
cmd.ExecuteScalar();
}
}
?
}
///
<summary>
///
执行返回SqlDaraReader方法
///
</summary>
///
<param name="sql"></param>
///
<param name="cmdType"></param>
///
<param name="pms"></param>
///
<returns></returns>
public
static
SqlDataReader
ExecuteDataReader(string
sql, CommandType
cmdType, params
SqlParameter[] pms)
{
SqlConnection
con
=
new
SqlConnection(conStr);
?
using (SqlCommand
cmd
=
new
SqlCommand(sql, con))
{
cmd.CommandType
=
cmdType;
if (pms
!=
null)
{
cmd.Parameters.AddRange(pms);
}
try
{
con.Open();
return
cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch
{
con.Close();
con.Dispose();
throw;
}
}
}
?
public
static
DataTable
ExecuteDataTable(string
sql, CommandType
cmdType, params
SqlParameter[] pms)
{
DataTable
dt
=
new
DataTable();
using (SqlDataAdapter
adapter
=
new
SqlDataAdapter(sql, conStr))
{
adapter.SelectCommand.CommandType
=
cmdType;
if (pms
!=
null)
{
adapter.SelectCommand.Parameters.AddRange(pms);
}
adapter.Fill(dt);
return
dt;
}
}
?
}