我正在使用ExecuteNonQuery在数据库中插入一条记录,并返回新记录的ID。可以插入,但输出参数不会更新。
试图在SSMS中执行存储过程,并且工作正常。使用ExecuteNonQuery执行时只有一个问题。
包括所有用于尝试插入的代码。
public int InsertPurchaseOrder(IPurchaseOrder po)
{
int returnId = 0;
int returnCount = 0;
List<IParam> parms = ParameterFactory.CreateListInstance();
parms.Add(ParameterFactory.CreateParameter("@Timestamp", po.Timestamp, SqlDbType.Timestamp, ParameterDirection.Output));
parms.Add(ParameterFactory.CreateParameter("@Status", po.Status, SqlDbType.Int, ParameterDirection.Input));
parms.Add(ParameterFactory.CreateParameter("@Subtotal", po.Subtotal, SqlDbType.Money, ParameterDirection.Input));
parms.Add(ParameterFactory.CreateParameter("@Taxes", po.Taxes, SqlDbType.Money, ParameterDirection.Input));
parms.Add(ParameterFactory.CreateParameter("@Total", po.Total, SqlDbType.Money, ParameterDirection.Input));
parms.Add(ParameterFactory.CreateParameter("@EmployeeId", po.EmployeeId, 8, SqlDbType.VarChar, ParameterDirection.Input));
parms.Add(ParameterFactory.CreateParameter("@PONumOut", 12345, SqlDbType.Int, ParameterDirection.Output));
try
{
returnCount = dataAccess.ExecuteNonQuery(SPROC_INSERT_PO, CommandType.StoredProcedure, parms);
if (returnCount >= 0)
{
po.Timestamp = (byte[])parms[0].Value;
returnId = Convert.ToInt32(parms[6].Value);
}
}
catch (Exception ex)
{
throw ex;
}
return returnId;
}
public static IParam CreateParameter(string name, object value, SqlDbType type, ParameterDirection direction)
{
return new Param(name, value, type, direction);
}
public Param(string name, object value, SqlDbType type, ParameterDirection direction)
{
Name = name;
Value = value;
Size = 0;
DataType = type;
Direction = direction;
}
public int ExecuteNonQuery(string cmdText, CommandType cmdType, List<IParam> parms)
{
SqlCommand cmd = CreateCommand(cmdText, cmdType, parms);
using (cmd.Connection)
{
cmd.Connection.Open();
return cmd.ExecuteNonQuery();
}
}
public SqlCommand CreateCommand(string cmdText, CommandType cmdType, List<IParam> parms)
{
SqlConnection conn = new SqlConnection(
Properties.Settings.Default.cnnString);
SqlCommand cmd = new SqlCommand(cmdText, conn);
cmd.CommandType = cmdType;
if (parms != null)
{
foreach (IParam p in parms)
{
cmd.Parameters.Add(new SqlParameter(p.Name,
p.DataType, p.Size));
cmd.Parameters[p.Name].Value = p.Value;
cmd.Parameters[p.Name].Direction = p.Direction;
}
}
return cmd;
}
ALTER PROCEDURE [dbo].[spInsertPO]
@Timestamp timestamp OUTPUT,
@Status Int,
@Subtotal money,
@Taxes money,
@Total money,
@EmployeeId varchar(8),
@PONumOut Int OUTPUT
AS
BEGIN
BEGIN TRY
SET NOCOUNT OFF
INSERT INTO
PurchaseOrder(Status,Subtotal,Taxes,Total,EmployeeId)
VALUES
(@Status, @Subtotal, @Taxes, @Total, @EmployeeId)
SET @PONumOut = @@IDENTITY;
END TRY
BEGIN CATCH
THROW
END CATCH
END
答案 0 :(得分:0)
解决了这个问题。
需要将我的ExecuteNonQuery()方法修改为以下内容。
public int ExecuteNonQuery(string cmdText, CommandType cmdType, List<IParam> parms)
{
SqlCommand cmd = CreateCommand(cmdText, cmdType, parms);
using (cmd.Connection)
{
cmd.Connection.Open();
int ret = cmd.ExecuteNonQuery();
UnloadParms(parms, cmd);
return ret;
}
}
并添加以下方法。
private static void UnloadParms(List<IParam> parms, SqlCommand cmd)
{
if (parms != null)
{
for (int i = 0; i <= parms.Count - 1; i++)
{
IParam p = parms[i];
p.Value = cmd.Parameters[i].Value;
parms[i] = p;
}
}
}
答案 1 :(得分:0)
请这样使用
`ALTER PROCEEDURE [dbo]。[spInsertPO] @Timestamp时间戳输出, @Status Int, @小计, @税收, @总钱, @EmployeeId varchar(8), @PONumOut Int输出 如 开始 开始尝试 设置NOCOUNT OFF 插入 PurchaseOrder(状态,小计,税金,总计,员工编号) 价值 (@ Status,@ Subtotal,@ Taxes,@ Total,@ EmployeeId)
SET @PONumOut = @@IDENTITY;
END TRY
BEGIN CATCH
THROW
END CATCH
返回@PONumOut;`
END