combo box that retrieve data from database in windows based application

[AishaKhalfan]

Hi all,

I have to populate combo box that retrieve data from database in windows based application. I have two tables which are type and CD. Type has type ID and Category. CD has type ID as foreign key. When I will add a new CD, the user interface for user will show combo box to choose the category from combo box and the selected value should be saved as type ID.

First, I did a quarry in type dataset that will do search by type ID.

Now, I don’t know how to use this method to populate the category combo box in CD interface.


Any volunteer to help me.

[dwadish]

i am not clear with your problem. please simplify it.

i think you want to save a type id from the table which corresponding catagory you are selected from the list.

plz specify your question.

try

[AishaKhalfan]

i am not clear with your problem. please simplify it.

i think you want to save a type id from the table which corresponding catagory you are selected from the list.

plz specify your question.

try

i think you want to save a type id from the table which corresponding catagory you are selected from the list.


This is what I mean. You understand correctly

[dwadish]

first bind the category from the type table to combobox.

select the typeid from the table where catagory= combobox.text
assign the typeid to a variable.

insert the typeid(variable ) into cd table.

try it now

[AishaKhalfan]

Hi,


Could you provide me with example (Code ) for each step, please?

So that it can be cleared, because someone else has this problem. As a result, all body can benefit.


Your help is appreciated.


Thank you & Waiting to answer

[dwadish]

   USERDISPFORM_ LOAD()
 OPEN THE DB CONECTION

  DIM DS AS NEW DATASET
DIM adpt as New sqldataadapter("select catagory from type",con)
adpt.fill(dt)

combo1.datasource=dt.tables(0)
combo1.displaymember="catagory"

close connection
end sub

 select any  event you like

               button1_clik( )
open connection

dim cmd as new sqlcommand("select typeid from type where catagory='"& combo1.text &"' ",con)

dim dr as sqldatareader
dr=cmd.exicutereader
dim s as string
while dr.read
s=dr.getvalue(0)
end while

dr.close
dim cmd2 as new sqlcommand("insert into cd values('"& s &"')",con)
dim dr as sqldatareader
dr=cmd2.exicutenonquery
dr.close
close connection

try it now

[AishaKhalfan]

   USERDISPFORM_ LOAD()
 OPEN THE DB CONECTION

  DIM DS AS NEW DATASET
DIM adpt as New sqldataadapter("select catagory from type",con)
adpt.fill(dt)

combo1.datasource=dt.tables(0)
combo1.displaymember="catagory"

close connection
end sub

 select any  event you like

               button1_clik( )
open connection

dim cmd as new sqlcommand("select typeid from type where catagory='"& combo1.text &"' ",con)

dim dr as sqldatareader
dr=cmd.exicutereader
dim s as string
while dr.read
s=dr.getvalue(0)
end while

dr.close
dim cmd2 as new sqlcommand("insert into cd values('"& s &"')",con)
dim dr as sqldatareader
dr=cmd2.exicutenonquery
dr.close
close connection

try it now

Hi,


Thank you a lot Mr. dwadish for hepling and its works

This is because, you helped me a lot to over come this problem which stop me to complete my project.


Wish you a good luck.



Aisha

[dwadish]

Welcome !! Aisha

which project you are doing. or for what

[AishaKhalfan]

Welcome !! Aisha

which project you are doing. or for what

it's for company friend.

[dwadish]

sorry best of luck.

i am a student of mcsd.net .

=============== =============== =

[AishaKhalfan]

sorry best of luck.

i am a student of mcsd.net .

=============== =============== =

Thank you


I wish you a good luck toooooooo

[dwadish]

Thank you


I wish you a good luck toooooooo

now i am MCAD.NET

Thanx