Question

I posted a similar query some time ago and decided to trim down the complexity of it to let developers answer my main problem. It could be stated as duplicate, but still I want to post it as editing the previous post did not yield much result.

I have 2 datatables: dataTable1 and dataTable2. Both have 1 row with same entries. For eg. columns in both the datatables are Name, Class, Subject. Now both row of both the dataTable are same with values (“John”, “5”, “Science”). Now I want to compare thses 2 rows if they they have same entries or not. I tried for:

if(dataTable1.Rows[0].GetHashCode() == dataTable2.Rows[0].GetHashCode()) 
{ 
    // Result is false (but I expected it to be true) 
} 

And also tried:

if(dataTable1.Rows[0].ItemArray == dataTable2.Rows[0].ItemArray) 
{ 
    // Result is false (but I expected it to be true) 
} 

I want to avoid loops to do it, but if needed thats fine. I just want to compare the 2 rows of 2 different dataTables that if their entries are same or not. And I am not sure how to proceed. Thanks.

Answer 1

var result= dataTable1.AsEnumerable().Intersect(dataTable2.AsEnumerable(),
                                                    DataRowComparer.Default);

it returns the records that are in both the table

more info at:

http://msdn.microsoft.com/en-us/library/bb386998.aspx