ODBC调用sybase的存储过程

CREATE PROCEDURE test

@iCount integer,

@dtModifyTime datetime,

@dcQuantity decimal(20,2) Output

AS

.....

在程序中调用这个存储过程，代码如下

try

{

OdbcCommand cmd = new OdbcCommand();

cmd.Connection = dbconnection;

cmd.CommandText = "test";

cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.Add("@iCount",OdbcType.Int);

cmd.Parameters[0].Value = 10;

cmd.Parameters.Add("@dtModifyTime",OdbcType.DateTime);

cmd.Parameters[1].Value = Convert.ToDateTime("2005-2-25 00:00:00");

cmd.Parameters.Add("@dcQuantity",OdbcType.Numeric);

cmd.Parameters[2].Direction = ParameterDirection.Output;

cmd.ExecuteNonQuery();

float num = (float)cmd.Parameters["dcQuantity"].Value;

MessageBox.Show(num.ToString());

}

catch(OdbcException oe)

{

MessageBox.Show(oe.Message);

}

程序执行到cmd.ExecuteNonQuery();会抛出异常

ERROR [HY000] [INTERSOLV][ODBC SQL Server driver][SQL Server]Procedure up_shizeLastBm expects parameter @iCount, which was not supplied.

ERROR [HY000] [INTERSOLV][ODBC SQL Server driver][SQL Server]Procedure up_shizeLastBm expects parameter @dtModifyTime, which was not supplied.

ERROR [HY000] [INTERSOLV][ODBC SQL Server driver][SQL Server]Procedure up_shizeLastBm expects parameter @dcQuantity, which was not supplied.

需要改为：

DateTime dt = new DateTime(2005,1,10);

OdbcCommand cmd = new OdbcCommand();

cmd.Connection = dbconnection;

cmd.CommandText = "test ?,?,?";

cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.Add("@iCount",OdbcType.Int);

cmd.Parameters[0].Value = 10;

cmd.Parameters.Add("@dtModifyTime",OdbcType.DateTime);

cmd.Parameters[1].Value = dt;

cmd.Parameters.Add("@dcQuantity",OdbcType.Double);

cmd.Parameters[2].Direction = ParameterDirection.Output;

cmd.ExecuteNonQuery();

double num = Convert.ToDouble(cmd.Parameters[3].Value);

MessageBox.Show(num.ToString());