一、不用SQLHelper.cs等帮助类
1.获取Return返回值
程序代码
存储过程
Create PROCEDURE MYSQL
@a int,
@b int
AS
return @a + @b
GO
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["LocalSqlServer"].ToString());
conn.Open();
SqlCommand MyCommand = new SqlCommand("MYSQL", conn);
MyCommand.CommandType = CommandType.StoredProcedure;
MyCommand.Parameters.Add(new SqlParameter("@a", SqlDbType.Int));
MyCommand.Parameters["@a"].Value = 10;
MyCommand.Parameters.Add(new SqlParameter("@b", SqlDbType.Int));
MyCommand.Parameters["@b"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@return", SqlDbType.Int));
MyCommand.Parameters["@return"].Direction = ParameterDirection.ReturnValue;
MyCommand.ExecuteNonQuery();
Response.Write(MyCommand.Parameters["@return"].Value.ToString());
2.获取Output输出参数值
程序代码
存储过程
Create PROCEDURE MYSQL
@a int,
@b int,
@c int output
AS
Set @c = @a + @b
GO
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["LocalSqlServer"].ToString());
conn.Open();
SqlCommand MyCommand = new SqlCommand("MYSQL", conn);
MyCommand.CommandType = CommandType.StoredProcedure;
MyCommand.Parameters.Add(new SqlParameter("@a", SqlDbType.Int));
MyCommand.Parameters["@a"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@b", SqlDbType.Int));
MyCommand.Parameters["@b"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@c", SqlDbType.Int));
MyCommand.Parameters["@c"].Direction = ParameterDirection.Output;
MyCommand.ExecuteNonQuery();
Response.Write(MyCommand.Parameters["@c"].Value.ToString());
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以下代码转自网络：
C#接收存储过程返回值:
public static int User_Add(User us)
{
int iRet;
SqlConnection conn = new SqlConnection(Conn_Str);
SqlCommand cmd = new SqlCommand("User_Add", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@UName", us.UName);
cmd.Parameters.AddWithValue("@UPass", us.UPass);
cmd.Parameters.AddWithValue("@PassQuestion", us.PassQuestion);
cmd.Parameters.AddWithValue("@PassKey", us.PassKey);
cmd.Parameters.AddWithValue("@Email", us.Email);
cmd.Parameters.AddWithValue("@RName", us.RName);
cmd.Parameters.AddWithValue("@Area", us.Area);
cmd.Parameters.AddWithValue("@Address", us.Address);
cmd.Parameters.AddWithValue("@ZipCodes", us.ZipCodes);
cmd.Parameters.AddWithValue("@Phone", us.Phone);
cmd.Parameters.AddWithValue("@QQ", us.QQ);
cmd.Parameters.Add("@RETURN_VALUE", "").Direction = ParameterDirection.ReturnValue;
try
{
conn.Open();
cmd.ExecuteNonQuery();
iRet = (int)cmd.Parameters["@RETURN_VALUE"].Value;
}
catch (SqlException ex)
{
throw ex;
}
finally
{
conn.Close();
}
return iRet;
}
C#接收存储过程输出参数:
public static decimal Cart_UserAmount(int UID)
{
decimal iRet;
SqlConnection conn = new SqlConnection(Conn_Str);
SqlCommand cmd = new SqlCommand("Cart_UserAmount", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@UID", UID);
cmd.Parameters.Add("@Amount", SqlDbType.Decimal).Direction=ParameterDirection.Output;
try
{
conn.Open();
cmd.ExecuteNonQuery();
iRet = (decimal)cmd.Parameters["@Amount"].Value;
}
catch (SqlException ex)
{
throw ex;
}
二、用SQLHelper.cs等帮助类，其思想一样
如：（贴出部分代码）
string readercode = txt_reader_code.Text;
string bookcode = txt_book_code.Text;
decimal money = Convert.ToDecimal(txt_price.Text);
DateTime borrowDate = Convert.ToDateTime(DateTime.Now.ToShortDateString());
DataTable table = new DBUtility.bookType().GetTableByBookBarCode(bookcode);
double borrowday;
double getday = 0d;
if (table != null && table.Rows.Count > 0)
{
if (double.TryParse(table.Rows[0]["borrowday"].ToString(), out borrowday))
{
getday = borrowday;
}
}
else
{
Pub.Util.AlertPostBack(Page, "得到图书借阅天数失败");
return;
}
DateTime returnDate = Convert.ToDateTime(DateTime.Now.AddDays(getday).ToShortDateString());
string readerName = txt_name.Text.Trim();
string bookName = txt_book_name.Text.Trim();
SqlParameter[] parameters = {
new SqlParameter("@readerBarCode",SqlDbType.VarChar),
new SqlParameter("@bookBarCode",SqlDbType.VarChar),
new SqlParameter("@hire",SqlDbType.Money),
new SqlParameter("@borrowDate",SqlDbType.DateTime),
new SqlParameter("@returnDate",SqlDbType.DateTime),
new SqlParameter("@readerName",SqlDbType.VarChar),
new SqlParameter("@bookName",SqlDbType.VarChar),
new SqlParameter("@return",SqlDbType.Int) //添加一个返回参数
};
parameters[0].Value = readercode;
parameters[1].Value = bookcode;
parameters[2].Value = money;
parameters[3].Value = borrowDate;
parameters[4].Value = returnDate;
parameters[5].Value = readerName;
parameters[6].Value = bookName;
parameters[7].Direction = ParameterDirection.ReturnValue; //声明此参数是返回类型
DBUtility.SQLHelper.ExecuteNonQuery(DBUtility.SQLHelper.BookConn, CommandType.StoredProcedure, "p_bookBorrow", parameters);
int num = Convert.ToInt32(parameters[7].Value.ToString());//提取存储过程返回参数的值,成功为0，不成功为-1
if (num == 0)
{ Pub.Util.AlertPostBack(Page, "借阅成功");
}
else
Pub.Util.AlertPostBack(Page, "借阅失败");
存储过程
create procedure p_bookBorrow(@readerBarCode varchar(30),@bookBarCode varchar(30),@hire money,@borrowDate datetime,@returnDate datetime,@bookName varchar(30),@readerName varchar(20))
as
begin tran
insert into t_reader_book values(@readerBarCode,@bookBarCode,@borrowDate,@returnDate,@bookName,@readerName)
if(@@error<>0)
begin
rollback tran
return -1
end
update t_readerinfo set borrownum=borrownum+1,[money]=[money]-@hire where readerBarCode = @readerBarCode
if(@@error<>0)
begin
rollback tran
return -1
end
update t_bookinfo set stock=stock-1 where bookBarCode =@bookBarCode
if(@@error<>0)
begin
rollback tran
return -1
end
insert into logs values(getDate(),'条形码号为：'+@readerBarCode+'的读者，借阅了图书编号为：'+@bookBarCode+'的书籍')
if(@@error<>0)
begin
rollback tran
return -1
end
commit tran
if(@@error<>0)
return -1
else
return 0
GO
