In My Datatable Last Column (Dialleddurations) Time In Hh:Mm:Ss Format I Want Show The Total Duration In Footer Can You Please Tell Me The Logic ?

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i am converting my data from my datatable to pdf but the thing is i want show the total duration in footer in pdf file . time in HH:mm:ss format in my last column named DialledDuration.

Posted 30-Nov-15 19:53pm

venkataramana k

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George Jonsson 1-Dec-15 2:05am

Can you explain a little bit more?
Is how to format the time string that is the problem?

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Jawad Ahmed Tanoli · Answer 1 · 2015-11-30T20:39:00

Solution 1

C#

var sum = (TimeSpan)dt.Compute("Sum(DialledDuration)", "");
lblTotal.Text = String.Format("{0} Days {1} Hours {2} Minutes {3} Seconds",sum.Days,sum.Hours,sum.Minutes,sum.Seconds);

Posted 30-Nov-15 20:39pm

Jawad Ahmed Tanoli

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venkataramana k 1-Dec-15 7:28am

when i code like this it will shows error
"Invalid usage of aggregate function Sum() and Type: String."

Jawad Ahmed Tanoli 1-Dec-15 7:34am

you must define your datatable with datatype like this

DataTable workTable = new DataTable("Customers");

DataColumn workCol = workTable.Columns.Add("CustID", typeof(Int32));
workCol.AllowDBNull = false;
workCol.Unique = true;

workTable.Columns.Add("CustLName", typeof(String));
workTable.Columns.Add("CustFName", typeof(String));
workTable.Columns.Add("Purchases", typeof(Double));

Jawad Ahmed Tanoli 1-Dec-15 7:30am

it means your DialledDuration is string datatype how many columns in your datatable