i have one table returndate and actualreturndate i want to calculate days b/w them without saving in database

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i have one table returndate and actualreturndate i want to calculate days b/w them without saving in databas

Posted 14-Sep-12 20:01pm

Mandy Nagra

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CoderVivs · Answer 1 · 2012-09-14T21:54:00

Solution 4

Try this Query

Select DATEDIFF(DAY,ReturnDate,ActualRe

SQL

turndate) As FineDays From BookIssueTable

Posted 14-Sep-12 21:54pm

CoderVivs

Gautam Raithatha · Answer 2 · 2012-09-14T20:19:00

Solution 1

hi...
I guess that u need it in SQL server and not in C# code behind.

try this: (u need to set dates in variables from ur table)

SQL

declare @date1 datetime
declare @date2 datetime

set @date1='2012-09-12'
set @date2='2012-09-15'

select DATEDIFF(d,@date1,@date2) as 'Difference'

Result: 3

Posted 14-Sep-12 20:19pm

Gautam Raithatha

Comments

Mandy Nagra 15-Sep-12 2:40am

i dunt want to use database.... only coding in visual

Gautam Raithatha · Answer 3 · 2012-09-14T21:05:00

Solution 2

then use like this:

C#

DateTime date1 = DateTime.Parse("2012-09-12");
DateTime date2 = DateTime.Parse("2012-09-15");

TimeSpan ts = date2.Subtract(date1);

lblDifference.Text = ts.TotalDays.ToString();

:)

Posted 14-Sep-12 21:05pm

Gautam Raithatha

Updated 14-Sep-12 21:08pm

v3

Comments

Mandy Nagra 15-Sep-12 3:15am

if we hv different dates in same table and we want to calculate dat not fixed dates then

Gautam Raithatha 15-Sep-12 3:23am

then u can select dates from those tables by your data access method and assign them to 'date1' and 'date2' variables in above example. :)

Mandy Nagra 15-Sep-12 3:30am

lbldiference id date given in gridveiw name to label

Gautam Raithatha 15-Sep-12 3:37am

i cant understand what u said?

Mandy Nagra 15-Sep-12 3:42am

i have bookssiue table in which ActualReturndate and ReturnDate r thr nw m making from i want to Calculate difference in days without Add value of fine days in database

Gautam Raithatha · Answer 4 · 2012-09-15T01:19:00

Thats what i was telling. Fetch data from database into DataTable using your access method:

DataTable, say dt, looks something like:

-------------------------------------------
BookIssueId | ReturnDate | ActualReturnDate
-------------------------------------------
1           | 2012-09-12 | 2012-09-15
2           | 2012-09-05 | 2012-09-07
-------------------------------------------

Then add column "DifferenceDays" in dt:

C#

dt.Columns.Add("DifferenceDays", typeof(int));

Then calculate difference days as below:

C#

foreach (DataRow dr in dt.Rows)
        {
            DateTime date1 = DateTime.Parse(dr["ReturnDate"].ToString());
            DateTime date2 = DateTime.Parse(dr["ActualReturnDate"].ToString());

            TimeSpan ts = date2.Subtract(date1);

            dr["DifferenceDays"] = ts.TotalDays.ToString();
        }

Now set dt as grids datasource. Thats it!!! :)