how to parameterized query

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.NET1.0

hi,

C#

string q1 = "select * from register where  areaofspecific like '%@area%'";
       using (SqlCommand cmd = new SqlCommand(q1, conn))
       {
           cmd.Parameters.AddWithValue("@area", TextBox4.Text);
           SqlDataAdapter adp = new SqlDataAdapter(cmd);
           adp.Fill(ds);
       }
       GridView1.DataSource = ds;
       GridView1.DataBind();

by using this now also i didn't get the result

thank u

Posted 31-Mar-11 2:12am

vimalaaa

Updated 31-Mar-11 2:42am

v4

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Аslam Iqbal · Answer 1 · 2011-03-31T03:37:00

All of the solutions are correct. But you may need to add %% on query param.
try here:

C#

string q1 = "select * from register where  areaofspecific like @area";
cmd.Parameters.AddWithValue("@the", "%"+textBox4.Text+"%");

Not Here:

C#

string q1 = "select * from register where  areaofspecific like '%@area%'";

Finally I'll say to do this:
type %myarea% inside your textbox4 and code:

MIDL

string q1 = "select * from register where  areaofspecific like @area";
cmd.Parameters.AddWithValue("@the",textBox4.Text);

Because user will decide, will he give % or not inside his query.

Not Active · Answer 2 · 2011-03-31T02:22:00

DataSet ds = new DataSet();
string q1 = "select * from register where  areaofspecific like '@area'";
using(SqlCommand cmd = new SqlCommand(q1, conn))
{
   cmd.Parameters.AddWithValue("@area", TextBox4.Text);
   SqlDataAdapter adp = new SqlDataAdapter(cmd);
   adp.Fill(ds);
}
GridView1.DataSource = ds;
GridView1.DataBind();

Mahendra.p25 · Answer 3 · 2011-03-31T02:21:00

Solution 1

Its an example.
try this

C#

string value = TextBox1.text;
Cmd = new SqlCommand("DELETE FROM Table WHERE CountryMasterId = @ID", Con);
 Cmd.Parameters.AddWithValue("@ID", value );

Posted 31-Mar-11 2:21am

Mahendra.p25

Updated 31-Mar-11 2:24am

v2

how to parameterized query

3 solutions

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