sql - Error on C# when trying to fetch multiple data from database -


i have code in c#:

 private void sqlconnlabel()   {         noidpenghuni = new sqlparameter();         sqlconnection con = new sqlconnection(strcon);          com2 = new sqlcommand();         com2.connection = con;         con.open();          com2.commandtype = commandtype.storedprocedure;         com2.commandtext = "label";          noidpenghuni.sqldbtype = sqldbtype.varchar;         noidpenghuni.size = 50;         noidpenghuni.parametername = "@noidpenghuni";         noidpenghuni.value = noidpenghunic;         noidpenghuni.direction = parameterdirection.input;          com2.parameters.add(noidpenghuni);          string namapenghuni;         string jkpenghuni;         string notelppenghuni;         string alamatpenghuni;         string nokamar;          namapenghuni = convert.tostring(com2.executescalar());         jkpenghuni = convert.tostring(com2.executescalar());         notelppenghuni = convert.tostring(com2.executescalar());         alamatpenghuni = convert.tostring(com2.executescalar());         nokamar = convert.tostring(com2.executescalar());          sqldatareader reader = com2.executereader();         while (reader.read())         {             namapenghuni = reader["namapenghuni"] == dbnull.value ? null : (string)reader["namapenghuni"];             jkpenghuni = reader["jkpenghuni"] == dbnull.value ? null : (string)reader["jkpenghuni"];             notelppenghuni = reader["notelppenghuni"] == dbnull.value ? null : (string)reader["notelppenghuni"];             alamatpenghuni = reader["alamatpenghuni"] == dbnull.value ? null : (string)reader["alamatpenghuni"];             nokamar = reader["nokamar"] == dbnull.value ? null : (string)reader["nokamar"];         }          label9.text = noidpenghunic;         label8.text = namapenghuni;          if (jkpenghuni == "p")             label7.text = "male";         else             label7.text = "female";          label6.text = notelppenghuni;         label18.text = alamatpenghuni;          label5.text = nokamar;         con.close();     }

when try run keeps telling me

indexoutofrangeexception unhandled.

i think data won't fetched c#. takes 'namapenghuni'

for example: if take data noidpenghuni='110801101, namapenghuni should priska hapsari, jkpenghuni should w, notelppenghuni should 08567711332, , alamatpenghuni should jl. mega cinere no. 29, cinere.

but on locals section can see string variables values priska hapsari.

what did wrong?

you call 5 times executescalar before executereader.
executescalar returns first column of first row (just 1 result).
calling 5 times results in same value 5 variables

the indexoutofrange exception caused following executereader expects find 5 columns in returned values, can't see if storedprocedure returns 5 values per row


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