Please help me out for same

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Hello all

Below is my C# code which I translate from VB using some one offline tool but am facing an 'DateDiff' Context error in it

Below is my C# code

C#

if (dateok & timeok)
{
System.DateTime thislesson_datetime = default(System.DateTime);
if (!string.IsNullOrEmpty(Request["form_lesson_time$form_dropdown__Hour"]))
{
thislesson_datetime = Convert.ToDateTime(Request["form_lesson_date"] + " " + Request["form_lesson_time$form_dropdown__Hour"] + ":" + Request["form_lesson_time$form_dropdown__Minute"] + " " + Request["form_lesson_time$form_dropdown__AMPM"]);
}
else
{
thislesson_datetime = Convert.ToDateTime(Request["form_lesson_date"] + " " + Request["form_lesson_time"]);
}
if (DateDiff(DateInterval.Hour, thislesson_datetime, fixed_Now) > 0 & String.Len(String.Trim(Request["form_lesson_notes"])) < 50)
{
errors += "
Please enter detailed lesson notes.";
}
}

Error:

if (DateDiff(DateInterval.Hour, thislesson_datetime, fixed_Now) > 0 & String.Len(String.Trim(Request["form_lesson_notes"])) < 50)
Error Name: The name 'DateDiff' Does not exist in current context.

You all are requested to help me sort this error

Posted 11-Jun-15 23:50pm

Member 11758222

Updated 12-Jun-15 18:43pm

RajeeshMenoth

v2

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3 solutions

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DamithSL · Answer 1 · 2015-06-12T00:17:00

Solution 3

do as below

C#

if ((fixed_Now -thislesson_datetime).TotalHours > 0 && Request["form_lesson_notes"].Trim().Length < 50)
{

}

Posted 12-Jun-15 0:17am

DamithSL

Updated 12-Jun-15 17:37pm

v3

Comments

Richard Deeming 12-Jun-15 7:27am

Close, but the String class doesn't have static methods called Len or Trim. :)

DamithSL 12-Jun-15 23:38pm

thank you Richard, updated with String.Trim() method and Length property

Richard MacCutchan · Answer 2 · 2015-06-12T00:01:00

Solution 1

Boolean AND requires a double ampersand, so:

C#

if (DateDiff(DateInterval.Hour, thislesson_datetime, fixed_Now) > 0 && String.Len(String.Trim(Request["form_lesson_notes"])) < 50)

Posted 12-Jun-15 0:01am

Richard MacCutchan

Comments

Richard Deeming 12-Jun-15 7:25am

Technically, you can use a single & / | in a boolean expression, although it's not usually done. They provide non-short-circuiting versions of the more common && / || operators.

Richard MacCutchan 12-Jun-15 8:44am

Technically ...

Bimal pedini · Answer 3 · 2015-06-12T00:02:00

Solution 2

Hi ,

you can check like..

C#

if((EndDate - StartDate).TotalDays > 0)

you will get the date difference.

Thanks
Bimal

Posted 12-Jun-15 0:02am

Bimal pedini

Updated 12-Jun-15 0:03am

v2