add data to database using String SQL

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Can anybody give me an example for inserting data to database using String SQL command which includes insert into, values and also where?

I tried to write own-by-own but it gives me error which says incorrect syntax near the keyword where.

And this is my code;

C#

String SQL = " insert into measurrrecords(pulse)"+
             
             "values ('"+textBox1.Text"')"+

             "where ID= '"ComboBox1.SelectedIndex"'";

What do you think about my problem?

Posted 25-Jul-12 21:02pm

sesenyg

Updated 25-Jul-12 21:14pm

Prasad_Kulkarni

v2

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barneyman · Answer 1 · 2012-07-25T21:06:00

Solution 1

You can't use a WHERE clause on an INSERT - and it makes no sense to :)

There are loads of SQL Tutorials[^] on the web, I'd suggest you read through some - you'll learn considerably more than getting piecemeal solutions on here

Posted 25-Jul-12 21:06pm

barneyman

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sesenyg 26-Jul-12 3:19am

actually you are so right, now i understood the problem. It made me crazy for 2 days. Thank you so muchhh!!!!

OriginalGriff · Answer 2 · 2012-07-25T21:09:00

I think two things:
1) You forgot a number of plus signs:

C#

"values ('"+textBox1.Text"')"+

Becomes

C#

"values ('"+textBox1.Text + "')"+

And

C#

"where ID= '"ComboBox1.SelectedIndex"'";

Becomes

C#

"where ID= '" + ComboBox1.SelectedIndex + "'";

and
2) You shouldn't do it like that. Do not concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead.