delete records in table

Question

0.00/5 (No votes)

See more:

i create small vb.net project. when i delete
record by name display erro message like
this "

system.data.sqlclient.sqlexception:invalid
column name 'jak'. at system .data.........

but actualy 'jak' and his infomation saved
in table. then i try delete his infomation by
his age. its worked. but i have no idea
delete infomation by names. my code is

VB

try
Dim del As new sqlcomand("DELETE FROM
members WHERE name="& textbox1.text
& "", dbcon)
dbconn.open()
del.execuenonquery()
dbconn.close()
Catch ex as Exception
Msgbox(ex.tostring)
end try

is it corect??
please friends help me. I'm using vb.net
and sql server. table name is members. there have two fields. its name(text) and age(int)
thank you.

Posted 2-Feb-12 22:57pm

Amal anjula

Updated 3-Feb-12 10:45am

Wendelius

v2

Add a Solution

Comments

palraj001 3-Feb-12 5:07am

repace this
Dim del As new sqlcomand("DELETE FROM
members WHERE name='"& textbox1.text
& "'", dbcon)

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2012-02-02T23:15:00

Solution 1

Firstly, you shouldn't do it like that - it is an invitation to an SQL Injection attack, which can damage or destroy your database. Use Parametrized queries instead:

VB

Dim del As new SqlCommand("DELETE FROM members WHERE name=@NM", dbcon)
del.Parameters.AddWithValue("@NM", textbox1.Text)

Secondly, you may find your problem disappears as well!

Posted 2-Feb-12 23:15pm

OriginalGriff

Comments

Amal anjula 3-Feb-12 5:20am

thanks u lot! lot

Jaganathan Bantheswaran 3-Feb-12 6:07am

My 5up

Manoj Kumar Choubey · Answer 2 · 2012-02-02T23:19:00

Solution 2

Code is correct but at the time of coding and database table creation abide Naming on the name of Keywords.

Posted 2-Feb-12 23:19pm

Manoj Kumar Choubey

Sanjay K. Gupta · Answer 3 · 2012-02-03T17:40:00

Solution 3

Try this

VB

Dim del As new SqlCommand("DELETE FROM members WHERE name=@NM", dbcon)
del.Parameters.AddWithValue("@NM", textbox1.Text)

or

VB

Dim del As new sqlcomand("DELETE FROM
members WHERE name='"& textbox1.text
& "'", dbcon)

Posted 3-Feb-12 17:40pm

Sanjay K. Gupta