C# - Future Local Time Of A Place Using Longitude Latitude And Datetime

Jul 8, 2010

i am developing a travel application. for that I need to calculate the future local datetime of a location using Datetime (a future date),longitude and latitude. (for Eg: i want to calculate the local datetime of a location on August-10- 2010 11.23 AM . Due to the day light saving time the datetime offset may change so i need to convert the august-10- 2010 11.23 AM to local time of the location) I have the inputs longitude, latitude and Date time. i can calculate the current local date using Longitude and latitude but cannot calculate accurately for *future date because of the day light saving time off set* . off set may varies on future dates. i am using asp.net and c# .

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Latitude And Longitude Keep Changing Every Time Convert From Degrees Minutes Seconds To Decimal Degrees In C#

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coordinates.LongitudeSecond = this.ConvertDouble(this.txtLongSecond.Text);
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double newValue = 0;
double.TryParse(value, out newValue);
return newValue;
and ConvertDegreesMinutesSeconds is defined as:
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if (LatitudeDirection == Direction.South)
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else if (LongitudeDirection == Direction.West)
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If I don't make any change to the latitude or longitude and I click Apply Changes which basically does the above calucation again, it generates a different latitude and longitude in the database. This happens every time I go to edit it and don't make a change (I just click Apply Changes and it does the calculation again with a different result). In the above scenario, the new Latitude and Longitude is: Latitude = 28 Degrees, 45 Minutes, 12 Seconds Longitude = 81 Degrees, 40 Minutes, 32.4 Seconds If I do it again, it becomes:
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From the above examples, you can see that the Minute kept increasing by 1, which would indicate why it is generating a different latitude and longitude in decimal degrees in the database, so I guess the problem is more in the above area, but I am not sure where or why it is doing it?

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