when i press the button it went to the next page if password is right or wrong,i cant understand what is the problem

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C#

try
            {
                SqlConnection con = new SqlConnection(@"Data Source=LENOVO-41B3F2CE\SQLEXPRESS;Initial Catalog=IMS;Integrated Security=True;Pooling=False");
                string query = "SELECT [user].* FROM [user] where u_name='" + txtusername.Text + "' and pwd='" + txtpassword.Text + "'";
                SqlCommand com = new SqlCommand(query, con);
                con.Open();
                if (com.ExecuteNonQuery() == -1)
                {
                    Response.Redirect("WebForm1.aspx");
                    Label3.Text = "successfully";
                    
                }
                else
                {
                    Label3.Text = "not successfully";
                }
                con.Close();
            }
            catch (Exception ex)
            {
                Console.Write("" + ex.Message);
            }

Posted 17-Apr-13 19:01pm

fak_farrukh

Updated 17-Apr-13 19:03pm

Aarti Meswania

v2

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Comments

Karthik Harve 18-Apr-13 1:14am

Do you mean, it is always redirecting to "WebForm1.aspx" page whether the password is right or wrong ?

fak_farrukh 18-Apr-13 1:14am

yessssss

4 solutions

Solution 2

Implement as follows:

C#

try
            {
                SqlConnection con = new SqlConnection(@"Data Source=LENOVO-41B3F2CE\SQLEXPRESS;Initial Catalog=IMS;Integrated Security=True;Pooling=False");
                string query = "SELECT [user].* FROM [user] where u_name='" + txtusername.Text + "' and pwd='" + txtpassword.Text + "'";
                SqlCommand com = new SqlCommand(query, con);
                SqlDataReader DR=com.ExecuteReader();
                 con.Open();
                 If(DR.Read())
                 {
                    Response.Redirect("WebForm1.aspx");
                    Label3.Text = "successfully";
                 }
                else
                {
                    Label3.Text = "not successfully";
                }
                con.Close();
            }
            catch (Exception ex)
            {
                Console.Write("" + ex.Message);
            }

Posted 17-Apr-13 19:31pm

Thanks7872

Solution 3

C#

SqlConnection con = new SqlConnection(@"Data Source=RST1016;Initial Catalog=MDMdb;Integrated Security=True;Pooling=False");
            SqlDataReader dr;
            bool userExists = false;

            try
            {
                string query = "SELECT [user].* FROM [user] where u_name='" + txtusername.Text + "' and pwd='" + txtpassword.Text + "'";
                SqlCommand com = new SqlCommand(query, con);
                con.Open();

                dr = com.ExecuteReader();
                while (dr.Read())
                {
                    userExists = true;
                    break;
                }

                if (userExists)
                    Response.Redirect("WebForm1.aspx");
                else
                    Response.Write("not successfully");

            }
            catch (Exception ex)
            {
                Response.Write("" + ex.Message);
            }
            finally
            {
                if (con.State == ConnectionState.Open)
                    con.Close();
            }

try this out. this may help you. ExecuteNonQuery genrally return -1 hence all the time that condition is true and going to next page.

Posted 17-Apr-13 19:34pm

PrashantSonewane

Solution 4

hi pal ,
This is another way u can try it ....

SqlConnection con = new SqlConnection(@"Data Source=RST1016;Initial Catalog=MDMdb;Integrated Security=True;Pooling=False");
SqlDataReader dr;
bool userExists = false;

try
{
string query = "SELECT [user].* FROM [user] where u_name='" + txtusername.Text + "' and pwd='" + txtpassword.Text + "'";
SqlCommand com = new SqlCommand(query, con);
con.Open();

dr = com.ExecuteReader();
if(dr.RecordsAffected==1)
{
Response.Redirect("WebForm1.aspx");
}
else
{
Response.Write("not successfully");
}

}
catch (Exception ex)
{
Response.Write("" + ex.Message);
}
finally
{
if (con.State == ConnectionState.Open)
con.Close();
}

Posted 17-Apr-13 19:47pm

Sreenivasa Reddy G

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rmksiva · Accepted Answer · 2013-04-17T19:21:00

Hi,

ExecuteNoQuery Behaviour

"

Quote:
For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. When a trigger exists on a table being inserted or updated, the return value includes the number of rows affected by both the insert or update operation and the number of rows affected by the trigger or triggers. For all other types of statements, the return value is -1. If a rollback occurs, the return value is also -1.

So you ca Use ExecuteReader

if (com.ExecuteReader().HasRows)
               {
                   Response.Redirect("WebForm1.aspx");
                   Label3.Text = "successfully";

               }
               else
               {
                   Label3.Text = "not successfully";
               }

try this .

Thanks

Siva Rm K