CODEWITHSUNDEEP
c#
challengeAccepted
challengeAccepted

Reputation: 7620

Simple if statement

What does the if statement mean here?

Merchant merchant1 =new Merchant();

if(!merchant1.SaveMerchantDdetails(x, y, z))
{
    lblError.txt = "some error info"; 
}
else
{

}

Upvotes: 1

Views: 649

Answers (10)

amelvin
amelvin

Reputation: 9061

If you look in the Merchant class there will be a method something like

public bool SaveMerchantDdetails(var x, var y, var z)
{
  bool isSaved = false;

  // Save Merchant Details and check if the save worked, store whether it did in isSave

  return isSaved;
}

So the code:

if(!merchant1.SaveMerchantDdetails(x, y, z))

is simply checking if the boolean return from the SaveMerchantDdetails method is true or false. If the return is false then the error is displayed.

Upvotes: 0

Darin Dimitrov
Darin Dimitrov

Reputation: 1039538

It means that if the SaveMerchantDdetails method called on the merchant1 instance returns false it will set an error value to an error label.

Upvotes: 20

Ralf de Kleine
Ralf de Kleine

Reputation: 11745

When the save action for MerchantDdetails failes the method returns false in this case an error is shown by setting the error text.

Upvotes: 4

Yves M.
Yves M.

Reputation: 3318

If you write the code like this, it is much clearer what is happening. To have a local variable is also better for debugging.

    Merchant merchant1 =new Merchant(); 
    bool sucess = merchant1.SaveMerchantDdetails(x, y, z);
    if(sucess == false) 
    {
      lblError.txt = "some error info"; 
    }

So your code executes the method SaveMerchantDdetails on a object of the type Merchant. If it fails, a label (lbl would hint to that...) text is set to "some error info".

Upvotes: 4

Craig Hooghiem
Craig Hooghiem

Reputation: 1282

There is more to this. This simple IF statement is saying that if Merchant1 from SaveMerchantDdetails is false, then output an error message (apparently generated by another function)

Upvotes: 0

ChrisF
ChrisF

Reputation: 137198

The method SaveMerchantDetails gets called with the arguments x, y and z. It does what ever it does and returns a boolean to indicate success or failure.

By testing !merchant1.SaveMerchantDetails(x, y, z) the code is testing for the false or error state.

Upvotes: 0

Lewray
Lewray

Reputation: 1174

The if statement is being used to determine whether the Boolean return value of the method merchant1.SaveMerchantDdetails(); is true or false.

In this case if the method returns false then a label's text property is updated with the string shown. If the method returns true then the else block will be run instead.

Upvotes: 0

LukeH
LukeH

Reputation: 269658

If the call to the SaveMerchantDetails method returns false -- presumably because the details couldn't be saved properly for some reason -- then set the txt property of lblError to "some error info"; otherwise execute whatever code is in the else block.

Upvotes: 0

Shahin
Shahin

Reputation: 12861

if result of SaveMerchantDdetails not true then lblError.txt = "some error info";

Upvotes: 0

Tarik
Tarik

Reputation: 81831

Well I am not sure what exactly SaveMerchantDetails() methods does but it might mean if merchant doesn't save x.y,z then do the following in braces...

Upvotes: 1

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