using variable in queries in sql

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i want to write a query to select data from db in condition i want to use textbox1.text how can i do this??
in favor of multy time using of this query i want to write witoth Qcommand.Parameters.AddWithValu command.
my code is:

C#

string commandText = "select id from moshtari where mobile="+ textBox3.Text;
               
                Qcommand.CommandText = commandText;
                Qcommand.CommandType = CommandType.Text;
                object k = Qcommand.ExecuteScalar();

with this i see error.

Posted 8-Dec-12 21:23pm

f.sarikhani

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Surendra0x2 · Answer 1 · 2012-12-08T21:51:00

Solution 2

Write Like-

C#

string commandText = "select id from moshtari where mobile=@mobileno;
Qcommand.Parameters.AddWithValue("@mobileno",Textbox3.Text);

Posted 8-Dec-12 21:51pm

Surendra0x2

v2

Krunal Rohit · Answer 2 · 2012-12-08T21:29:00

Solution 1

C#

Qcommand.Parameters.AddWithValue("mobile",textbox3.Text);

Posted 8-Dec-12 21:29pm

Krunal Rohit