Solved

C# class needed - last day of month

Posted on 2003-11-26
9
1,607 Views
Last Modified: 2012-06-27
I am in a rush.  

Please provide working class that I can plug into my code:

I need the following

1)  Validation on Set StartDate value
2)  Validation on Set Offset value
3)  Finish the LastDayOfMonth function


Here is what I have done so far, please just plug in the missing pieces:

using System;

//Outer namespace will be called BuyersFund
namespace BuyersFund
{      //Inner namespace will be called Dates
      namespace Dates
      {
            /// <summary>
            /// Summary description for Class1.
            /// </summary>
            
            //Class name will be called DateFunctions
            public class DateFunctions
            {
                  //VBA function parameters StartDate and MonthOffset will become private data members of class DateFunctions of type string.
                  private String strStartDate;
                  private SmallInt siMonthOffset;

                  public DateFunctions()
                  {
                        //
                        // TODO: Add constructor logic here
                        //
                  }

                  public string DateString
                  {
                        set
                        {
                              strStartDate = value;
                        }
                        get
                        {
                              return strStartDate;
                        }
                  }

                  public SmallInt MonOffset
                  {
                        set
                        {
                              siMonthOffset = value;
                        }
                        get
                        {
                              return siMonthOffset;
                        }
                  }

                  public string LastDayOfMonth()
                  {
                        
                  }


            }
      }
}
0
Comment
Question by:Tom Knowlton
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
9 Comments
 
LVL 9

Assisted Solution

by:msdixon
msdixon earned 50 total points
ID: 9827818
question: why is everything a string? make it a DateTime instead.

basically what you want to do is take the start date, set the day to 1 and the month to the current month plus one, then subtract 1 day. let the framework do all the calculations.

pretty simple really.
0
 
LVL 10

Expert Comment

by:ptmcomp
ID: 9827867
private DateTime StringToDateTime(string date)
{
    DateTime result;
    try
    {
        result = DateTime.Parse(date);  // if you need to support different locales there is an overloaded method which supports all date formats
    }
    catch(FormatException)
    {
        // handle case when the date format is not correct
    }
    return result;
}

public string LastDayOfMonth()
{
    DateTime dateTime;
    DateTime lastDayOfMonth;
    int offset;

    dateTime = StringToDate(strStartDate);
    lastDayOfMonth = new DateTime(dateTime.Year, dateTime.Month + 1, 1).AddDays(-1); // first day of next month -1 = last day of the month    
    return lastDayOfMonth.ToString("dddd"); // returns the name of the day (mm/dd/yyyy returns the date)
}
0
 
LVL 5

Author Comment

by:Tom Knowlton
ID: 9827870
Did I mention I was in a rush?  :)


How is this?

using System;

//Outer namespace will be called BuyersFund
namespace BuyersFund
{      //Inner namespace will be called Dates
      namespace Dates
      {
            /// <summary>
            /// Summary description for Class1.
            /// </summary>
            
            //Class name will be called DateFunctions
            public class DateFunctions
            {
                  //VBA function parameters StartDate and MonthOffset will become private data members of class DateFunctions of type string.
                  private DateTime dtStartDate;
                  private Integer siMonthOffset;
                  private DateTime dtDate;

                  public DateFunctions()
                  {
                        //
                        // TODO: Add constructor logic here
                        //
                  }

                  public string DateString
                  {
                        set
                        {
                              //perform validation
                              if (value == "")
                              {
                                    dtStartdate = DateTime.Today;
                              }
                              else
                              {
                                    dtStartDate = value;
                              }
                        }
                        get
                        {
                              return dtStartDate;
                        }
                  }

                  public Int MonOffset
                  {
                        set
                        {
                              //datatype ensures will be numeric
                              if (IsNumeric(
                              siMonthOffset = value;
                        }
                        get
                        {
                              return siMonthOffset;
                        }
                  }

                  public string LastDayOfMonth()
                  {
                        dtDate = dtStartDate;
                        return dtDate.Day = 1;
                        return String(dtDate);
                  }


            }
      }
}
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 9

Assisted Solution

by:malharone
malharone earned 50 total points
ID: 9828017
what does SETOFFSET value do? just offset the date by XXX days?? (atleast that's what I'm assuming)

using System;

//Outer namespace will be called BuyersFund
namespace BuyersFund
{     //Inner namespace will be called Dates
   namespace Dates
   {
      /// <summary>
      /// Summary description for Class1.
      /// </summary>
         
      //Class name will be called DateFunctions
      public class DateFunctions
      {
         //VBA function parameters StartDate and MonthOffset will become private data members of class DateFunctions of type string.
         private String strStartDate;
         private System.DateTime dt_;
         private int siMonthOffset;

         private void setDate(String dt)
         {
            try
            {
               dt_=DateTime.Parse(dt);
            }
            catch
            {
               dt_=DateTime.MinValue;
            }
         }

         public DateFunctions()
         {
            //
            // TODO: Add constructor logic here
            //
         }

         public string DateString
         {
            set
            {
               strStartDate = value;
               this.setDate(strStartDate);
            }
            get
            {
               return strStartDate;
            }
         }

         public int MonOffset
         {
            set
            {
               siMonthOffset = value;
               try
               {
                  int n =int.Parse(siMonthOffset);
                  dt_.AddDays(n);
               }
               catch
               {
               }
            }
            get
            {
               return siMonthOffset;
            }
         }

         public int LastDayOfMonth()
         {
                int m = dt_.Month;
            switch(m)
            {
               case 1:
               case 3:
               case 5:
               case 7:
               case 8:
               case 10:
               case 12:
                  return 31;
               case 4:
               case 6:
               case 9:
               case 11:
                  return 30;
               default:      //2
                  DateTime t;
                  try
                  {
                     t=new  DateTime(dt_.Year,dt_.Month,29);
                     return 29;
                  }
                  catch
                  {
                     return 28;
                  }
                       
               }
         }

      }
   }
}
0
 
LVL 10

Expert Comment

by:ptmcomp
ID: 9828159
   dateTime = StringToDate(strStartDate);
    DateTime lastDateOfMonth = new DateTime(dateTime.Year, dateTime.Month + 1, 1).AddDays(-1);
    lastDayOfMonth = lastDateOfMonth.Day;
0
 
LVL 5

Author Comment

by:Tom Knowlton
ID: 9828201
What namespace is StringToDate in?
0
 
LVL 5

Author Comment

by:Tom Knowlton
ID: 9828482
What do you all think about this?

~~~~~~~~~~~~~~~~~~~~~~~~

using System;

//Outer namespace will be called BuyersFund
namespace BuyersFund
{      //Inner namespace will be called Dates
      namespace Dates
      {
            /// <summary>
            /// Summary description for Class1.
            /// </summary>
            
            //Class name will be called DateFunctions
            public class DateFunctions
            {
                  //VBA function parameters StartDate and MonthOffset will become private data members of class DateFunctions of type string.
                  private DateTime dtStartDate;
                  private int iMonthOffset;                  
                  private DateTime dtDate;

                  public DateFunctions()
                  {
                        //
                        // TODO: Add constructor logic here
                        //
                  }

                  public DateTime DateString
                  {
                        set
                        {
                              //data type ensures will be a datetime value
                              dtStartDate = value;
                        }
                              
                        get
                        {
                              return dtStartDate;
                        }
                  }

                  public int MonOffset
                  {
                        set
                        {
                              //datatype ensures will be numeric
                              iMonthOffset = value;
                        }
                        get
                        {
                              return iMonthOffset;
                        }
                  }

                  public DateTime LastDayOfMonth()
                  {      
                        if (dtStartDate.Month == 12)
                        {
                              DateTime lastDateOfMonth = new DateTime(dtStartDate.Year + 1, 1, 1).AddDays(-1);
                              dtDate = lastDateOfMonth;
                        }
                        else
                        {
                              DateTime lastDateOfMonth = new DateTime(dtStartDate.Year, dtStartDate.Month + 1, 1).AddDays(-1);
                              dtDate = lastDateOfMonth;
                        }
                        
                        return dtDate;
                  }
            }
      }
}
0
 
LVL 10

Accepted Solution

by:
ptmcomp earned 400 total points
ID: 9830089
             public DateTime LastDayOfMonth()
               {    
                    DateTime lastDateOfMonth = new DateTime(dtStartDate.Year, dtStartDate.Month, 1).AddMonths(1).AddDays(-1);
                    dtDate = lastDateOfMonth;
                   
                    return dtDate;
               }
0
 
LVL 5

Author Comment

by:Tom Knowlton
ID: 9851145
Thanks everyone.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In order to hide the "ugly" records selectors (triangles) in the rowheaders, here are some suggestions. Microsoft doesn't have a direct method/property to do it. You can only hide the rowheader column. First solution, the easy way The first sol…
Entity Framework is a powerful tool to help you interact with the DataBase but still doesn't help much when we have a Stored Procedure that returns more than one resultset. The solution takes some of out-of-the-box thinking; read on!
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …

738 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question