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object values appearing the same arent equal

Posted on 2008-06-16
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Last Modified: 2010-04-15
Hi:

  In the debugger I can see that the values of two objects look the same but when I do o1 == o2 this doesnt seem to hold true. I am tearing my hair out. Any clue why this would be the case. The

DataRow[] r = datatable.Select("ROWKEY=" + x);
Object o1 = r[0][columnName];                                     // original value
Object o2 = db2cmd.Parameter[columnName].Value;  //new value

if (o1 == o2)
{

}
 

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Question by:LuckyLucks
3 Comments
 
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Expert Comment

by:naspinski
ID: 21799267
do something like this to see if you can get more one what those objects are:
Response.Write("o1: " + o1.ToString() + "<br />");
Response.Write("o2: " + o2.ToString() + "<br />");
Response.Write("o1 GetType: " + o1.GetType().ToString() + "<br />");
Response.Write("o2 GetType: " + o2.GetType().ToString() + "<br />");

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Accepted Solution

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margajet24 earned 500 total points
ID: 21799305
try :

o1.Equals(o2)

since objects are refence type, they can have same values but their memory location is different..

check their value not their reference..
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Author Comment

by:LuckyLucks
ID: 21813614
I am curious about the explanation. If o1 == o2 compares the mem location then they should never be equal during the run of the program. But in some cases they are. Can you explain this?
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