when i click the generate button output to be shown in gridview

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student table

Studid    Bfid   Rate

  A        1      Good
  B        2      Fair
  C        3      Excellent

Batch table

Bfid     Class

   1        EFA
   2        MFA
   3        COC

Code as follows;

C#

sql = "Select studid,Bfid,Rate from student";
dr = scon.readsql(sql);
while(dr.read())
{
     bfid = dr[0].tostring().trim();
     sql = "select Class from batch";
     dr = scon.readsql(sql);
     if(d.hashrows == true)
     {
         gridview.datasource = dr;
         GridView1.DataBind();
         GridView1.Visible = true;
     }

In run mode as follows

I have one button called Load when i click that button the output as follows in gridview

Studid  Bfid    Rate       class

   A     1     Good        EFA
   B     2     Fair        MFA
   C     3     Excellent   COC

for that how can i do using csharp.

Regards,
Narasiman P.

Posted 10-May-13 2:35am

Member 8054539

Updated 10-May-13 2:51am

CHill60

v2

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CHill60 · Answer 1 · 2013-05-10T02:57:00

Just change your sql statement to

C#

sql = "Select studid,s.Bfid,Rate,class from student s left outer join Batch b on s.Bfid=b.Bfid";

I've used left outer join in case you have student records that do not have Batch records. If you only want to list students that do have a Batch record then change it to inner join
Also note that I've had to specify s.Bfid in the select clause because the column Bfid appears on both tables. Just using Bfid leads to an ambiguity error.

Prasad CM · Answer 2 · 2013-05-10T02:57:00

Solution 2

try with single query ...

C#

sql = "Select studid,Bfid,Rate,Class from student,batch";

after this bind grid

Posted 10-May-13 2:57am

Prasad CM