How to add items in dropdownlist from database

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Am using two pages first page to add data to tables and second table is to display the data .

this is Table (Batch id ,Student1,student2,student3)

in second Page List of Batch id should be displayed in Dropdownlist1.
and corresponding students has to be displayed in dropdownlist2.

Example Consider :

(Batch101,Alex,Peter,Ben)

(Batch102,Stew,John,Mark)

Batch101, Batch102 will be Displayed in Dropdownlist1 . When Batch101 is selected from Dropdownlist1, Dropdownlist2 should display Alex,Peter,Ben.

Posted 22-Mar-12 7:19am

rajsekar g

Updated 22-Mar-12 8:11am

v2

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Dean Oliver · Answer 1 · 2012-03-22T08:41:00

Solution 2

http://forums.devarticles.com/net-development-43/asp-net-and-data-binding-a-dropdown-list-with-sql-6452.html[^]

Posted 22-Mar-12 8:41am

Dean Oliver

Gopal Rakhal · Answer 2 · 2012-03-22T07:43:00

Solution 1

C#

String StrCon="Your Connection";
SqlConnection objcon=new sqlconnection(StrCon);
objcon.open();

string query="select Student from table where Batchid='"+Dropdownlist1.selectedItem.text+"'";

sqlcommand cmd=new sqlcommand(query,objcon);
sqldatareader dr;
dr=cmd.executereader();

if (dr.hasrows)
  {while(dr.read())
  {
    dropdownlist2.items.add(dr[0].tostring());
  }
}

Posted 22-Mar-12 7:43am

Gopal Rakhal

Updated 22-Mar-12 8:30am

Chris Maunder772.9K

v2

Comments

Dean Oliver 22-Mar-12 14:42pm

Gave you 4 because although this is a good solution you promoting sql injection attacks.

mali_angel 5-Aug-13 23:23pm

can anyone tell me the java code for above scenario?

Gopal Rakhal 22-Mar-12 21:05pm

plz improve this....