How to convert normal foreach loop into lambda expression in c# ?

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•   public static Collection<SalesPlan> GetCurrentPlan(PurchasePlanRequest purchasePlanRequest)
        {
            SalesCustomerManager salesCustomerManager = new SalesCustomerManager();
            SalesCustomer salesCustomer = new SalesCustomer();

            salesCustomer.ReportingCustomerNumber = purchasePlanRequest.ReportingCustomerId;
            Collection<SalesPlan> salesPlanCollection = new Collection<SalesPlan>();
            salesCustomer = salesCustomerManager.GetCustomerLinesPlansCoverages(salesCustomer);
            Collection<SalesPlan> renewalPlan = new Collection<SalesPlan>();
            Collection<SalesPlan> currentPlan = new Collection<SalesPlan>();
            foreach (SalesLineOfBusiness lob in salesCustomer.SalesLineOfBusinessCollection)
            {
                if (lob.LineOfBusinessCode == purchasePlanRequest.LOBCode)
                {
                    foreach (SalesPlan salepln in lob.SalesPlanCollection)
                    {
                        //Compare PlanEffectiveDate is equal to CurrentRenewalDate.
                        if (purchasePlanRequest.PlanEffectiveDate == currentRenewalDate)
                        {
                            if (salepln.IsRenewalPlan == true)
                            {
                                currentPlan.Add(salepln);
                            }
                        }
                        else
                        {
                            if (salepln.IsCurrentPlan == true)
                            {
                                currentPlan.Add(salepln);
                            }
                        }
                    }
                }
            }            return currentPlan;
        }
In the bold code foreach loop, I want to use Lambda expression instead of Foreach loop.
Can anybody suggest me approach of doing so….

Posted 20-Feb-13 0:24am

Member 8090436

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Member 8090436 20-Feb-13 6:39am

Thanks,
But what is in DoStuff() method....
How i do?

3 solutions

Solution 3

You can add a Where clause to your expression to limit the amount of data being iterated over as well...

public static Collection<salesplan> GetCurrentPlan(PurchasePlanRequest purchasePlanRequest)
        {
            SalesCustomerManager salesCustomerManager = new SalesCustomerManager();
            SalesCustomer salesCustomer = new SalesCustomer();
 
            salesCustomer.ReportingCustomerNumber = purchasePlanRequest.ReportingCustomerId;
            Collection<salesplan> salesPlanCollection = new Collection<salesplan>();
            salesCustomer = salesCustomerManager.GetCustomerLinesPlansCoverages(salesCustomer);
            Collection<salesplan> renewalPlan = new Collection<salesplan>();
            Collection<salesplan> currentPlan = new Collection<salesplan>();
            foreach (SalesLineOfBusiness lob in salesCustomer.SalesLineOfBusinessCollection.Where(o => o.LineOfBusinessCode == purchasePlanRequest.LOBCode))
            {
                
                lob.SalesPLanCollection.ForEach(i =>
                {
                  //Compare PlanEffectiveDate is equal to CurrentRenewalDate.
                  if (purchasePlanRequest.PlanEffectiveDate == currentRenewalDate)
                  {
                    if (salepln.IsRenewalPlan == true)
                    {
                      currentPlan.Add(salepln);
                    }
                    else
                    {
                      if (salepln.IsCurrentPlan == true)
                      {
                        currentPlan.Add(salepln);
                      }
                    }
                  }
                 
                });
                
            }            

            return currentPlan;
        }</salesplan></salesplan></salesplan></salesplan></salesplan></salesplan></salesplan>

Posted 7-Dec-15 11:41am

Byrd Man

Comments

Matt T Heffron 7-Dec-15 18:58pm

This question was two and a half years old.
Resurrecting it with a "solution" of questionable value is considered "poor form"

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Abhinav S · Accepted Answer · 2013-02-20T00:37:00

Solution 1

You can run a loop over a collection using LINQ as below -
lob.SalesPlanCollection.ForEach(i => i.DoStuff());

Posted 20-Feb-13 0:37am

Abhinav S

Simon_Whale · Accepted Answer · 2013-02-20T01:50:00

My first question would be WHY? would you want to convert it too Lambda? As I personally dont see anything wrong with the code

but to answer your question;

C#

lob.SalesPLanCollection.ForEach(i =>
{
  //Compare PlanEffectiveDate is equal to CurrentRenewalDate.
  if (purchasePlanRequest.PlanEffectiveDate == currentRenewalDate)
  {
    if (salepln.IsRenewalPlan == true)
    {
      currentPlan.Add(salepln);
    }
    else
    {
      if (salepln.IsCurrentPlan == true)
      {
        currentPlan.Add(salepln);
      }
    }
  }

});