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How to check the value of an object

Posted on 2006-10-19
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Last Modified: 2010-04-16
Hi,
i have the following code,now the object hasAttachments retruns me true or false .Depending on the value of hasAttachments i have to display icon can anyone tell me how do i check if the hasAttachments return true because this code is givin me error

 Cannot implicitly convert type 'object' to 'bool'


Object hasAttachments = e.Row.Cells.FromKey("HasAttachments").Value;

string attchStr;

if( hasAttachments = true  )
{
attchStr = "<a href=\"#\" onclick=\"window.open(\'Add.aspx?TPId=" + id + "&TPNumber=" + tpNum + "\'" + ", \'Attachment\','height=360,width=480'); return false;\"><img src=\'../Images/icon_attachment.jpg\' border=\'0\'></a>";
}
else
{
              attchStr = "<a href=\"#\" onclick=\"window.open(\'Add.aspx?TPId=" + id + "&TPNumber=" + tpNum + "\'" + ", \'Attachment\','height=360,width=480'); return false;\"><img src=\'../Images/addA.GIF\' border=\'0\'></a>";
}
0
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Question by:aspnetdev
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4 Comments
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 17767094
Have you tried declaring hasAttachments as a bool?  Also you should be using == instead of =...

bool hasAttachments = e.Row.Cells.FromKey("HasAttachments").Value;

if (hasAttachments == true)
0
 
LVL 18

Expert Comment

by:Ravi Singh
ID: 17767131
Hi, you need to explicitly cast the object to a bool or convert the object:

bool hasAttachments = Convert.ToBoolean(e.Row.Cells.FromKey("HasAttachments").Value);

if (hasAttachments)
{
      attchStr = "<a href=\"#\" onclick=\"window.open(\'Add.aspx?TPId=" + id + "&TPNumber=" + tpNum + "\'" + ", \'Attachment\','height=360,width=480'); return false;\"><img src=\'../Images/icon_attachment.jpg\' border=\'0\'></a>";
}
else
{
     attchStr = "<a href=\"#\" onclick=\"window.open(\'Add.aspx?TPId=" + id + "&TPNumber=" + tpNum + "\'" + ", \'Attachment\','height=360,width=480'); return false;\"><img src=\'../Images/addA.GIF\' border=\'0\'></a>";
}
0
 
LVL 86

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 17767137
You may need additional casting in there:

    bool hasAttachments = (bool)e.Row.Cells.FromKey("HasAttachments").Value;

But you could proably just do the whole thing in your "if" statement:

    if ((bool)e.Row.Cells.FromKey("HasAttachments").Value == true)
0
 
LVL 10

Expert Comment

by:NetworkArchitek
ID: 17767150
This is an aside to your question but you may want to build your HTML with String.Format() instead of those concatenations. It makes life easier for me.
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