Possible unintended reference comparison; to get a value comparison, cast the left hand side to type 'string'

Question

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C#

if (dt.Rows[0]["Gender"] == "Male")
                                   {
                                       rdomale.Checked = true;
                                   }
                                   else
                                   {
                                       rdofemale.Checked = true;
                                   }

Posted 19-Nov-12 22:29pm

zeshanazam

Updated 7-May-20 9:17am

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5 solutions

Solution 4

Hi,

Update your code as below.

C#

if(dt!=null &&dt.Rows.Count>0 && Convert.ToString(dt.Rows[0]["Gender"]).Equals("Male"))
{
 rdomale.Checked = true;
}
else
{
 rdofemale.Checked = true;
}

Here Convert.ToString also checks for null exception.

Hope this will help you.

Posted 19-Nov-12 22:58pm

Mohd. Mukhtar

Updated 19-Nov-12 23:00pm

v2

Solution 3

Hi
Try this.

C#

if (dt.Rows.Count>0 && dt.Rows[0]["Gender"].ToString().Equals("Male"))
{
  rdomale.Checked = true;
}
else
{
  rdofemale.Checked = true;
}

Posted 19-Nov-12 22:57pm

Dominic Abraham

Solution 2

You are getting problem because table has no rows.
Try this:

C#

rdomale.Checked=(dt.Rows.Count>0 && dt.Rows[0]["Gender"].ToString() == "Male");
rdofemale.Checked = (!rdomale.Checked);

Posted 19-Nov-12 22:48pm

Subrata.In

Updated 19-Nov-12 23:07pm

v3

Solution 6

bring "Male" first in conditon

Posted 7-May-20 9:17am

Member 14825171

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Pete O'Hanlon · Accepted Answer · 2012-11-19T22:30:00

Solution 1

dt.Rows[0]["Gender"] is an object - add .ToString() at the end to get the string value.

Posted 19-Nov-12 22:30pm

Pete O'Hanlon

Comments

zeshanazam 20-Nov-12 4:41am

nothing happend, same warning exists.

Pete O'Hanlon 20-Nov-12 4:45am

Does your line now read if (dt.Rows[0]["Gender"].ToString() == "Male") ?

Pete O'Hanlon 20-Nov-12 4:46am

If that's not working for you, change it to this: if ((string)dt.Rows[0]["Gender"] == "Male")