app.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<connectionStrings>
<add connectionString="Data Source=PC-20120110JFDT;Initial Catalog=test1;Persist Security Info=True;User ID=sa;Password=yhb" name="connstr" />
<add connectionString="Data Source=PC-20120110JFDT;Initial Catalog=Test;Persist Security Info=True;User ID=sa;Password=yhb" name="connstr2" />
<add connectionString="Data Source=PC-20120110JFDT;Initial Catalog=School;Persist Security Info=True;User ID=sa;Password=yhb" name="connstr3" />
</connectionStrings>
</configuration>
c#:
private void button3_Click(object sender, EventArgs e)
{
string connstr= ConfigurationManager.ConnectionStrings["connstr3"].ConnectionString;
using(SqlConnection conn=new SqlConnection(connstr))
{
conn.Open();
using (SqlCommand cmd = new SqlCommand("usp_money", conn))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@_output", textBox3.Text));
cmd.Parameters.Add(new SqlParameter("@_input", textBox4.Text));
cmd.Parameters.Add(new SqlParameter("@_money", textBox5.Text));
int ok= cmd.ExecuteNonQuery();
if (ok >= 1)
{
MessageBox.Show("转账成功");
}
else
{
MessageBox.Show("转账失败");
}
}
}
}
sql:
create proc usp_money @_input varchar(50)='001',@_output varchar(50),@_money money
as
begin
begin try--错误捕捉
begin tran--打开事务
update bank set balacnce=balacnce-@_money where cid=@_output
update bank set balacnce=balacnce+@_money where cid=@_input
commit--提交事务
end try--错误捕捉
begin catch--错误处理
rollback--回滚
end catch--错误处理
end
drop proc usp_money