Worked out timespan but need to mins 00:20:00 (HH:mm:ss)
Using two buttons to start and stop each using a
start_time = Format(Date.Now, "HH:mm:ss")
or
stop_time = Format(Date.Now, "HH:mm:ss")
to store the time and when submitting it uses a timespan to calculate the difference which works like a treat
Dim duration As TimeSpan = stop_time - start_time
Say if i recorded 00:59:00 minutes, how would i minus 00:20:00?, im guessing it would be another timespan with duration minus 00:20:00 but not sure how to get the 00:20:00 in a format to use this.
Cheers,
Pete
vb.net
asked Nov 19 '18 at 11:15
Peter JamesPeter James
437
add a comment |
Using two buttons to start and stop each using a
start_time = Format(Date.Now, "HH:mm:ss")
or
stop_time = Format(Date.Now, "HH:mm:ss")
to store the time and when submitting it uses a timespan to calculate the difference which works like a treat
Dim duration As TimeSpan = stop_time - start_time
Say if i recorded 00:59:00 minutes, how would i minus 00:20:00?, im guessing it would be another timespan with duration minus 00:20:00 but not sure how to get the 00:20:00 in a format to use this.
Cheers,
Pete
vb.net
asked Nov 19 '18 at 11:15
Peter JamesPeter James
437
Subtraction of dates produces a timespan. Subtraction of timespans also produces a timespan. Are you asking how to manually construct a timespan for 20 minutes?
– GSerg
Nov 19 '18 at 11:25
TryTimeSpan.FromMinutes(20.0).
– Enigmativity
Nov 19 '18 at 11:30
1
Why are you using strings? Use allTimeSpantypes:Dim start_time As TimeSpan = Date.Now.TimeOfDay. ATimeSpanof 20 minutes isDim SubSpan As TimeSpan = New TimeSpan(0, 20, 0). Then subtract:Dim duration As TimeSpan = stop_time - start_time->duration = duration - SubSpan
– Jimi
Nov 19 '18 at 11:31
@Jimi - Why not post that as an answer?
– Enigmativity
Nov 19 '18 at 11:32
1
You should try settingOption Strict Onand see what that does to your code. (If you can get past the initial shock it'll make you a better coder.)
– Enigmativity
Nov 19 '18 at 11:39
add a comment |
Using two buttons to start and stop each using a
start_time = Format(Date.Now, "HH:mm:ss")
or
stop_time = Format(Date.Now, "HH:mm:ss")
to store the time and when submitting it uses a timespan to calculate the difference which works like a treat
Dim duration As TimeSpan = stop_time - start_time
Say if i recorded 00:59:00 minutes, how would i minus 00:20:00?, im guessing it would be another timespan with duration minus 00:20:00 but not sure how to get the 00:20:00 in a format to use this.
Cheers,
Pete
vb.net
asked Nov 19 '18 at 11:15
Peter JamesPeter James
437
Using two buttons to start and stop each using a
start_time = Format(Date.Now, "HH:mm:ss")
or
stop_time = Format(Date.Now, "HH:mm:ss")
to store the time and when submitting it uses a timespan to calculate the difference which works like a treat
Dim duration As TimeSpan = stop_time - start_time
Say if i recorded 00:59:00 minutes, how would i minus 00:20:00?, im guessing it would be another timespan with duration minus 00:20:00 but not sure how to get the 00:20:00 in a format to use this.
Cheers,
Pete
vb.net
vb.net
asked Nov 19 '18 at 11:15
Peter JamesPeter James
437
asked Nov 19 '18 at 11:15
Peter JamesPeter James
437
asked Nov 19 '18 at 11:15
Peter JamesPeter James
437
asked Nov 19 '18 at 11:15
Peter JamesPeter James
437
asked Nov 19 '18 at 11:15
Peter JamesPeter James
437
437
Subtraction of dates produces a timespan. Subtraction of timespans also produces a timespan. Are you asking how to manually construct a timespan for 20 minutes?
– GSerg
Nov 19 '18 at 11:25
TryTimeSpan.FromMinutes(20.0).
– Enigmativity
Nov 19 '18 at 11:30
1
Why are you using strings? Use allTimeSpantypes:Dim start_time As TimeSpan = Date.Now.TimeOfDay. ATimeSpanof 20 minutes isDim SubSpan As TimeSpan = New TimeSpan(0, 20, 0). Then subtract:Dim duration As TimeSpan = stop_time - start_time->duration = duration - SubSpan
– Jimi
Nov 19 '18 at 11:31
@Jimi - Why not post that as an answer?
– Enigmativity
Nov 19 '18 at 11:32
1
You should try settingOption Strict Onand see what that does to your code. (If you can get past the initial shock it'll make you a better coder.)
– Enigmativity
Nov 19 '18 at 11:39
add a comment |
Subtraction of dates produces a timespan. Subtraction of timespans also produces a timespan. Are you asking how to manually construct a timespan for 20 minutes?
– GSerg
Nov 19 '18 at 11:25
TryTimeSpan.FromMinutes(20.0).
– Enigmativity
Nov 19 '18 at 11:30
1
Why are you using strings? Use allTimeSpantypes:Dim start_time As TimeSpan = Date.Now.TimeOfDay. ATimeSpanof 20 minutes isDim SubSpan As TimeSpan = New TimeSpan(0, 20, 0). Then subtract:Dim duration As TimeSpan = stop_time - start_time->duration = duration - SubSpan
– Jimi
Nov 19 '18 at 11:31
@Jimi - Why not post that as an answer?
– Enigmativity
Nov 19 '18 at 11:32
1
You should try settingOption Strict Onand see what that does to your code. (If you can get past the initial shock it'll make you a better coder.)
– Enigmativity
Nov 19 '18 at 11:39
Subtraction of dates produces a timespan. Subtraction of timespans also produces a timespan. Are you asking how to manually construct a timespan for 20 minutes?
– GSerg
Nov 19 '18 at 11:25
Subtraction of dates produces a timespan. Subtraction of timespans also produces a timespan. Are you asking how to manually construct a timespan for 20 minutes?
– GSerg
Nov 19 '18 at 11:25
Try
TimeSpan.FromMinutes(20.0).– Enigmativity
Nov 19 '18 at 11:30
Try
TimeSpan.FromMinutes(20.0).– Enigmativity
Nov 19 '18 at 11:30
1
1
Why are you using strings? Use all
TimeSpan types: Dim start_time As TimeSpan = Date.Now.TimeOfDay. A TimeSpan of 20 minutes is Dim SubSpan As TimeSpan = New TimeSpan(0, 20, 0). Then subtract: Dim duration As TimeSpan = stop_time - start_time -> duration = duration - SubSpan– Jimi
Nov 19 '18 at 11:31
Why are you using strings? Use all
TimeSpan types: Dim start_time As TimeSpan = Date.Now.TimeOfDay. A TimeSpan of 20 minutes is Dim SubSpan As TimeSpan = New TimeSpan(0, 20, 0). Then subtract: Dim duration As TimeSpan = stop_time - start_time -> duration = duration - SubSpan– Jimi
Nov 19 '18 at 11:31
@Jimi - Why not post that as an answer?
– Enigmativity
Nov 19 '18 at 11:32
@Jimi - Why not post that as an answer?
– Enigmativity
Nov 19 '18 at 11:32
1
1
You should try setting
Option Strict On and see what that does to your code. (If you can get past the initial shock it'll make you a better coder.)– Enigmativity
Nov 19 '18 at 11:39
You should try setting
Option Strict On and see what that does to your code. (If you can get past the initial shock it'll make you a better coder.)– Enigmativity
Nov 19 '18 at 11:39
add a comment |
1 Answer
1
active
oldest
votes
As of now, you're using strings to store DateTime values. There's no reason for it.
Strings should be used - when dealing with DateTime structure - for presentation only.
Use a TimeSpan to perform these calculations.
Store the start time of an operation:
Dim StartTime As TimeSpan = Date.Now.TimeOfDay
Store the end time of an operation:
Dim StopTime As TimeSpan = Date.Now.TimeOfDay
Calculate the Duration:
Dim Duration As TimeSpan = StopTime - StartTime
A TimeSpan value can be created with:
[TimeSpan] = new TimeSpan([Hours], [Minutes], [Seconds]) or: [TimeSpan] = TimeSpan.FromSeconds([Seconds]) | TimeSpan.FromMinutes([Minutes]) | .FromHours([Hours]) etc.
Note that the first form accepts Integer values, while the second form accepts Double values: when inserting the value in minutes, add a # to the value (indicating that the value is a Double type) and see what happens.
Create a new TimeSpan of 20 minutes and subtract it from the Duration value:
Dim SubSpan As TimeSpan = New TimeSpan(0, 20, 0)
'Or
Dim SubSpan As TimeSpan = TimeSpan.FromMinutes(20.0#)
Duration -= SubSpan
Use the TimeSpan.ToString() method to present the DateTime / TimeSpan value in a human readable, localized, form:
TextBox1.Text = Duration.ToString()
Or using a specific format:
TextBox1.Text = duration.ToString("hh:mm:ss")
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.InvariantCulture)
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.CreateSpecificCulture("en-UK"))
As noted in the comments (and in many other questions every day), it would be
a great idea to setOption Strict On, possiblyOption Explicit On
and (it can be really useful)Option Infer Onin the Project properties.
This will help a lot in making the right decision when declaring and using your Types.
answered Nov 19 '18 at 12:36
JimiJimi
8,12241934
add a comment |
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As of now, you're using strings to store DateTime values. There's no reason for it.
Strings should be used - when dealing with DateTime structure - for presentation only.
Use a TimeSpan to perform these calculations.
Store the start time of an operation:
Dim StartTime As TimeSpan = Date.Now.TimeOfDay
Store the end time of an operation:
Dim StopTime As TimeSpan = Date.Now.TimeOfDay
Calculate the Duration:
Dim Duration As TimeSpan = StopTime - StartTime
A TimeSpan value can be created with:
[TimeSpan] = new TimeSpan([Hours], [Minutes], [Seconds]) or: [TimeSpan] = TimeSpan.FromSeconds([Seconds]) | TimeSpan.FromMinutes([Minutes]) | .FromHours([Hours]) etc.
Note that the first form accepts Integer values, while the second form accepts Double values: when inserting the value in minutes, add a # to the value (indicating that the value is a Double type) and see what happens.
Create a new TimeSpan of 20 minutes and subtract it from the Duration value:
Dim SubSpan As TimeSpan = New TimeSpan(0, 20, 0)
'Or
Dim SubSpan As TimeSpan = TimeSpan.FromMinutes(20.0#)
Duration -= SubSpan
Use the TimeSpan.ToString() method to present the DateTime / TimeSpan value in a human readable, localized, form:
TextBox1.Text = Duration.ToString()
Or using a specific format:
TextBox1.Text = duration.ToString("hh:mm:ss")
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.InvariantCulture)
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.CreateSpecificCulture("en-UK"))
As noted in the comments (and in many other questions every day), it would be
a great idea to setOption Strict On, possiblyOption Explicit On
and (it can be really useful)Option Infer Onin the Project properties.
This will help a lot in making the right decision when declaring and using your Types.
answered Nov 19 '18 at 12:36
JimiJimi
8,12241934
add a comment |
As of now, you're using strings to store DateTime values. There's no reason for it.
Strings should be used - when dealing with DateTime structure - for presentation only.
Use a TimeSpan to perform these calculations.
Store the start time of an operation:
Dim StartTime As TimeSpan = Date.Now.TimeOfDay
Store the end time of an operation:
Dim StopTime As TimeSpan = Date.Now.TimeOfDay
Calculate the Duration:
Dim Duration As TimeSpan = StopTime - StartTime
A TimeSpan value can be created with:
[TimeSpan] = new TimeSpan([Hours], [Minutes], [Seconds]) or: [TimeSpan] = TimeSpan.FromSeconds([Seconds]) | TimeSpan.FromMinutes([Minutes]) | .FromHours([Hours]) etc.
Note that the first form accepts Integer values, while the second form accepts Double values: when inserting the value in minutes, add a # to the value (indicating that the value is a Double type) and see what happens.
Create a new TimeSpan of 20 minutes and subtract it from the Duration value:
Dim SubSpan As TimeSpan = New TimeSpan(0, 20, 0)
'Or
Dim SubSpan As TimeSpan = TimeSpan.FromMinutes(20.0#)
Duration -= SubSpan
Use the TimeSpan.ToString() method to present the DateTime / TimeSpan value in a human readable, localized, form:
TextBox1.Text = Duration.ToString()
Or using a specific format:
TextBox1.Text = duration.ToString("hh:mm:ss")
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.InvariantCulture)
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.CreateSpecificCulture("en-UK"))
As noted in the comments (and in many other questions every day), it would be
a great idea to setOption Strict On, possiblyOption Explicit On
and (it can be really useful)Option Infer Onin the Project properties.
This will help a lot in making the right decision when declaring and using your Types.
answered Nov 19 '18 at 12:36
JimiJimi
8,12241934
add a comment |
As of now, you're using strings to store DateTime values. There's no reason for it.
Strings should be used - when dealing with DateTime structure - for presentation only.
Use a TimeSpan to perform these calculations.
Store the start time of an operation:
Dim StartTime As TimeSpan = Date.Now.TimeOfDay
Store the end time of an operation:
Dim StopTime As TimeSpan = Date.Now.TimeOfDay
Calculate the Duration:
Dim Duration As TimeSpan = StopTime - StartTime
A TimeSpan value can be created with:
[TimeSpan] = new TimeSpan([Hours], [Minutes], [Seconds]) or: [TimeSpan] = TimeSpan.FromSeconds([Seconds]) | TimeSpan.FromMinutes([Minutes]) | .FromHours([Hours]) etc.
Note that the first form accepts Integer values, while the second form accepts Double values: when inserting the value in minutes, add a # to the value (indicating that the value is a Double type) and see what happens.
Create a new TimeSpan of 20 minutes and subtract it from the Duration value:
Dim SubSpan As TimeSpan = New TimeSpan(0, 20, 0)
'Or
Dim SubSpan As TimeSpan = TimeSpan.FromMinutes(20.0#)
Duration -= SubSpan
Use the TimeSpan.ToString() method to present the DateTime / TimeSpan value in a human readable, localized, form:
TextBox1.Text = Duration.ToString()
Or using a specific format:
TextBox1.Text = duration.ToString("hh:mm:ss")
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.InvariantCulture)
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.CreateSpecificCulture("en-UK"))
As noted in the comments (and in many other questions every day), it would be
a great idea to setOption Strict On, possiblyOption Explicit On
and (it can be really useful)Option Infer Onin the Project properties.
This will help a lot in making the right decision when declaring and using your Types.
answered Nov 19 '18 at 12:36
JimiJimi
8,12241934
As of now, you're using strings to store DateTime values. There's no reason for it.
Strings should be used - when dealing with DateTime structure - for presentation only.
Use a TimeSpan to perform these calculations.
Store the start time of an operation:
Dim StartTime As TimeSpan = Date.Now.TimeOfDay
Store the end time of an operation:
Dim StopTime As TimeSpan = Date.Now.TimeOfDay
Calculate the Duration:
Dim Duration As TimeSpan = StopTime - StartTime
A TimeSpan value can be created with:
[TimeSpan] = new TimeSpan([Hours], [Minutes], [Seconds]) or: [TimeSpan] = TimeSpan.FromSeconds([Seconds]) | TimeSpan.FromMinutes([Minutes]) | .FromHours([Hours]) etc.
Note that the first form accepts Integer values, while the second form accepts Double values: when inserting the value in minutes, add a # to the value (indicating that the value is a Double type) and see what happens.
Create a new TimeSpan of 20 minutes and subtract it from the Duration value:
Dim SubSpan As TimeSpan = New TimeSpan(0, 20, 0)
'Or
Dim SubSpan As TimeSpan = TimeSpan.FromMinutes(20.0#)
Duration -= SubSpan
Use the TimeSpan.ToString() method to present the DateTime / TimeSpan value in a human readable, localized, form:
TextBox1.Text = Duration.ToString()
Or using a specific format:
TextBox1.Text = duration.ToString("hh:mm:ss")
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.InvariantCulture)
TextBox1.Text = duration.ToString("hh:mm:ss", CultureInfo.CreateSpecificCulture("en-UK"))
As noted in the comments (and in many other questions every day), it would be
a great idea to setOption Strict On, possiblyOption Explicit On
and (it can be really useful)Option Infer Onin the Project properties.
This will help a lot in making the right decision when declaring and using your Types.
answered Nov 19 '18 at 12:36
JimiJimi
8,12241934
edited Nov 19 '18 at 17:38
answered Nov 19 '18 at 12:36
JimiJimi
8,12241934
answered Nov 19 '18 at 12:36
JimiJimi
8,12241934
answered Nov 19 '18 at 12:36
JimiJimi
8,12241934
8,12241934
add a comment |
add a comment |
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Subtraction of dates produces a timespan. Subtraction of timespans also produces a timespan. Are you asking how to manually construct a timespan for 20 minutes?
– GSerg
Nov 19 '18 at 11:25
Try
TimeSpan.FromMinutes(20.0).– Enigmativity
Nov 19 '18 at 11:30
1
Why are you using strings? Use all
TimeSpantypes:Dim start_time As TimeSpan = Date.Now.TimeOfDay. ATimeSpanof 20 minutes isDim SubSpan As TimeSpan = New TimeSpan(0, 20, 0). Then subtract:Dim duration As TimeSpan = stop_time - start_time->duration = duration - SubSpan– Jimi
Nov 19 '18 at 11:31
@Jimi - Why not post that as an answer?
– Enigmativity
Nov 19 '18 at 11:32
1
You should try setting
Option Strict Onand see what that does to your code. (If you can get past the initial shock it'll make you a better coder.)– Enigmativity
Nov 19 '18 at 11:39