Question

I make calculation in stored procedure and pass output parameter. It works fine execution in SQL side. But c# retrieves output value -decimal(18,4)- by automatically rounding if it is lower than 0,5 to 0, if higher than 0.5 to 1.

I need decimal(18,4) output precisely.

How can I prevent decimal(18,4) output value rounding?

c#

double sonuc=0;
    SqlCommand cmd = new SqlCommand("findHBK", Connection.Con);
    cmd.Parameters.AddWithValue("@yaFark", yaFark);
    cmd.Parameters.AddWithValue("@yaTaban", yaTaban);
    cmd.Parameters.Add("@sonuc", SqlDbType.Decimal).Direction = ParameterDirection.Output;               
    cmd.CommandType = CommandType.StoredProcedure;            
    if (cmd.Connection.State != ConnectionState.Open)
    {
        cmd.Connection.Open();
    }
    cmd.ExecuteNonQuery();
    sonuc = Convert.ToDouble(cmd.Parameters["@sonuc"].Value);

sql (part of stored prodecure)

  ALTER proc [dbo].[findHBK](
        @yaTaban decimal(18,2),
        @yaFark decimal(18,2),
        @sonuc decimal(18,4) output
    )
    as
    BEGIN 
    declare @minhbk decimal(18,4), @maxhbk decimal(18,4), @hbkFark decimal(18,4)

        if(@yaTaban between 2000 and 5000)
        BEGIN
            set @maxhbk=(select MAX(HBK) from TBL_MDHB
            where YapiAlani between @yaTaban and @yaTaban+200)
            set @minhbk=(select MIN(HBK)from TBL_MDHB
            where YapiAlani between @yaTaban and @yaTaban+200)
            --set @sonuc=@maxhbk-(((@maxhbk-@minhbk)*@yaFark)/200);
            set @sonuc=0.3292
            select @sonuc
        END 
        select @sonuc out
    END

Answer 1

请参阅以下代码。

请设置您需要返回的SqlParameter的Precision和Scale属性。它将完美地运作。

        cmd.Parameters["@sonuc"].Precision = 18;
        cmd.Parameters["@sonuc"].Scale = 4;

在SqlCommand中添加参数后设置此属性。

对你有帮助。

谢谢。

How to prevent Sql rounding decimal(18,4) output in c# side

1 个答案: