Get the sum of a db table in c#

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Hi, would someone please tell me whats wrong.

I have a SQL Table that stores the runtime mins of a machine against the date it was running.
If the machine is powered down for longer than 10 mins, the code writes a second runtime entry with the same date, effectively leaving 2(or more) entries with the same date.

SQL

eg
Date       |Runtime

15/11/2013 |120
16/11/2013 |140
16/11/2013 | 70

if i run the sql query

SQL

select sum(ActualRunTime) from MonthlyRunData where Date = '16/11/2013'

returns 210
Now, i am trying to do this in c# so here is my code

C#

conX.Open();
SqlCommand readRunTimeActual = new SqlCommand();
readRunTimeActual.Connection = conX;
string sqlreadRunTimeActual = "Select sum(ActualRunTime) from MonthlyRunData " +
                              "where Date = '16/11/2013'";

readRunTimeActual.CommandText = sqlreadRunTimeActual;
SqlDataReader getRunTimeActual;
getRunTimeActual = readRunTimeActual.ExecuteReader();
getRunTimeActual.Read();

string runActual = (getRunTimeActual[("ActualRunTime")].ToString());
actRunTimeTot = int.Parse(runActual);
conX.Close();

This returns 'IndexOutofRange Exception' at the point highlighted in bold above.
I do not know why. It works in SQL fine.
Thank you in advance.

Posted 21-Nov-13 18:51pm

Davey85

Updated 21-Nov-13 19:00pm

Tom Marvolo Riddle

v3

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Comments

Er Daljeet Singh 22-Nov-13 1:11am

string runActual = (getRunTimeActual[0].ToString());
it will work only in case when your query will return atleast single record.

Davey85 22-Nov-13 1:15am

Thank you very much for your response.

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ArunRajendra · Accepted Answer · 2013-11-21T19:08:00

Solution 1

I think the field "ActualRunTime" name is not defined.
Try one of this.
1.

C#

string sqlreadRunTimeActual = "Select sum(ActualRunTime) ActualRunTime from MonthlyRunData " + "where Date = '16/11/2013'";

2. (getRunTimeActual[0].ToString()); I am not sure if first field index is 0 or 1. I am guessing its 0.

Posted 21-Nov-13 19:08pm

ArunRajendra

Updated 21-Nov-13 19:56pm

v3

Comments

Davey85 22-Nov-13 1:12am

Thank you very much!

ArunRajendra 22-Nov-13 1:23am

your welcome :)

Davey85 25-Nov-13 1:06am

sorry to bother you again but how would you do the same thing but with a summed multiplication?

"Select sum(Lenth * Quantity) from CoilRunData " + "where Date = '16/11/2013'";

ArunRajendra 25-Nov-13 1:58am

Just give an alias as shown Select sum(Lenth * Quantity) Total from CoilRunData " + "where Date = '16/11/2013'

Davey85 25-Nov-13 17:07pm

Yes, i understand it now, you are assigning the result of the multiplication to 'Total' and summing the result. When you assigned 'ActualRunTime' in the initial question under the same name it worked but i didnt get why, now i do. Thank you very much for your help.