want to use "if" "else" condition in linq,

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In sql I use like this:

Classcud2 ob1 = new Classcud2("select * from tbl_usertotalrating where store_name='" + TxtCompany.Text + "'");
        if (ob1.ds.Tables[0].Rows.Count > 0)
        {
           // what i want
        }
        else
        {
         // what i want
        }

but my problem is I want to use "if" "else" condition in linq,
In linq :

var v = from k in li.category1s where k.cat_name == Ddlcategory.Text select k;

but whether this condition is right or wrong "var v " always have some data,
then how i use like this

C#

if(v==null)
{

}
else
{

}

I thing you understand my problem,
please help me

Posted 3-Jan-13 18:09pm

Arun kumar Gauttam

Updated 3-Jan-13 18:27pm

Sandeep Mewara

v2

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3 solutions

Solution 1

This is a where, so you should use a strongly typed list. Then use ToList() and you can check if your list has more than one item in it. Or just do a for each on var, and in side the for each, set a bool to true, that will mean you have data.

Posted 3-Jan-13 18:31pm

Christian Graus

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Vishal.Shimpi144 · Accepted Answer · 2013-01-03T18:34:00

Solution 2

Use like this

C#

if (v.Count() > 0)
 {
   //what you want
 }
 else
 {
   //what you want 
 }

Posted 3-Jan-13 18:34pm

Vishal.Shimpi144

Comments

_Amy 4-Jan-13 1:05am

5'ed !!

Arun kumar Gauttam 4-Jan-13 2:04am

thanks

Sandeep Mewara · Accepted Answer · 2013-01-03T18:38:00

Solution 3

When no results are returned, you have an 'empty' list. This is same as a new list created.

For it, you can try any of the following:

C#

if (!returnedResult.Any()) 
{
  // No result
}

//OR
if(returnedResult.Count() > 0)
{ 
  // Some result
}

//OR 
// convert result into a list
var returnedResult = (from Q in myDataContext select Q.ID).ToList();
if (returnedResult.Count > 0)
{
  // Some data returned
}

Posted 3-Jan-13 18:38pm

Sandeep Mewara

Updated 3-Jan-13 18:39pm

v2

Comments

_Amy 4-Jan-13 1:05am

5'ed !!

Sandeep Mewara 4-Jan-13 10:39am

Thanks.

Arun kumar Gauttam 4-Jan-13 2:04am

thanks

Sandeep Mewara 4-Jan-13 10:39am

Welcome.