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i have comment textbox.And it is working perfectly.when i enter text in textbox of comment data inserted sucessfully in database table.But if i use 's in writing comment in textbox,it will give me error.I know perfectly that it is error because of 's.what coding is require to solve this problem?
SqlCommand cmd = new SqlCommand("insert into table (name,address,comment) values('" + txtname.text + "','" + txtaddress.text + "','"+txtcomment.text+"')", cnn);
Posted 17-Jan-13 8:41am

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Solution 1

Basically, you need to double it up.

Try something like:

txtcomment.Text.Replace("'", "''");

That is very simplistic and you should research the reasons behind this and come up with a solution that fits your specific needs.
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Comments
Sergey Alexandrovich Kryukov at 17-Jan-13 17:02pm
   
My 5, for leaving OP some room for further work. :-)
—SA
Marcus Kramer at 17-Jan-13 17:13pm
   
+5.
adriancs at 17-Jan-13 22:11pm
   
To understand the need of doing this,
Try execute this:

string name = "anyname";
string address = "anyaddress";
string comment = "anycomment'); DROP TABLE IF EXISTS `table`; SELECT ('surprise";

SqlCommand cmd = new SqlCommand("insert into table (name,address,comment) values('" + name + "','" + address + "','" + comment + "')", cnn);

It's called SQL Injection.
Member 9511889 at 19-Jan-13 1:01am
   
where this code i have to write?
mark merrens at 19-Jan-13 10:03am
   
It's in the solution. Think about it.

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