CODEWITHSUNDEEP
c#try-catch
jason
jason

Reputation: 7164

How to use try catch with var in C#

I have this piece of code : 

var takbis = o.DeserializeXmlString<List<Takbis>>();
ViewBag.SessionId = id;
_takbis.GetTakbisValues(takbis, vm);

I want to apply try-catch like this : 

try
{
var takbis = o.DeserializeXmlString<List<Takbis>>();
}
catch
{
var takbis = o.DeserializeXmlString<BankReport>();
}

    ViewBag.SessionId = id;

    _takbis.GetTakbisValues(takbis, vm);

But I can't use it like this it says takbis does not exist in current context. I don't know the type of takbis, so I can't declare it before try catch. How can I solve this situation? Thanks.

Upvotes: 1

Views: 1674

Answers (4)

Rohit Rohela
Rohit Rohela

Reputation: 422

For your information, var are processed at compile time not at run time. Also var is not actually a type, its actual type is replaced by compiler. You can either check in your compiled code about the type of your `var'

Upvotes: 2

sujith karivelil
sujith karivelil

Reputation: 29006

I suggest you to use dynamic instead for var and use the code like this. If you use var then the type of variable declared is decided by the compiler at compile time. but in the case of dynamic the type of variable declared is decided by the compiler at runtime time.

try this:

dynamic takbis;
try
{
   takbis = o.DeserializeXmlString<List<Takbis>>();
}
catch
{
   takbis = o.DeserializeXmlString<BankReport>();
}

Read more about the comparison

Upvotes: 3

Aleksandar Matic
Aleksandar Matic

Reputation: 799

Try this:

object takbis;
try
{
    takbis = o.DeserializeXmlString<List<Takbis>>();
}
catch
{
    takbis = o.DeserializeXmlString<BankReport>();
}

    ViewBag.SessionId = id;

    _takbis.GetTakbisValues(takbis, vm);

Upvotes: 3

Inbar Barkai
Inbar Barkai

Reputation: 302

It is impossible. The variable must be declared outside of the try clause in order for it to be used later.

Upvotes: 2

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