How to prevent sql injection

Question

0.00/5 (No votes)

See more:

Hi Expert,

I am developing website in csharp asp.net.
I am using Mysql as database.

In Some page i am searching record from database using Textbox txtSearch.

example

C#

string data=txtSearch.Text;

select * from companydetails where company LIKE '%" + data + "%'  or category1 LIKE '%" + data + "' or category2 LIKE '%" + data + "%'

Is it safe from Sql Injection attack ?

How to prevent it?

Thanks in advance.

Posted 25-Sep-11 21:17pm

udusat13

Updated 25-Sep-11 21:23pm

walterhevedeich

v2

Add a Solution

2 solutions

Solution 1

Is it safe from Sql Injection attack
No.

How To: Protect From SQL Injection in ASP.NET[^]

Posted 25-Sep-11 21:23pm

m@dhu

Comments

udusat13 26-Sep-11 3:36am

Thanksssssssssssssssss.

Dalek Dave 26-Sep-11 4:02am

Quite right.

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 · Accepted Answer · 2011-09-25T21:33:00

Solution 2

No. It isn't at all safe! What if the user typed:

%';DROP TABLES companydetails;--

Try a parametrized query instead:

SQL

select * from companydetails where company LIKE '%' + @DATA + '%' or category1 LIKE '%' + @DATA + '%' or category2 LIKE '%' + @DATA + '%'

and then provide the @DATA parameter via the SqlCommand.Parameters.AddWithValue method.

Posted 25-Sep-11 21:33pm

OriginalGriff

Comments

udusat13 26-Sep-11 3:37am

Thanksssssssssssss..........