Check a textbox against an entry in a SQL Database

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Hello,

Ive created a simple login windows form using VB.

At the moment all it does is checks what is entered into the text box against a set value if it is correct then login.

I am now trying not to have a set value and to actually get the login page to check against a number of usernames and passwords in a SQL database.

Any suggestions are appreciated.

Regards,

Glen.

Posted 17-Oct-13 1:25am

Glen Childs

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Dipesh Wadhwa · Accepted Answer · 2013-10-17T01:55:00

Consider the following example:
Suppose i have table tbleUserAuthentication, and two columns in this table i.e, Username and Password.
Following piece of code will help you to check information entered in Textbox against SQL Server.

C#

SqlConnection con = new SqlConnection("Your Connection Here");
SqlCommand cmd_retrvefrmDB = new SqlCommand("select * from tbleUserAuthentication where username=@u and Password=@p",con);
cmd_retrvefrmDB.Parameters.AddWithValue("@u",Your_UserName_TextBox.Text);
cmd_retrvefrmDB.Parameters.AddWithValue("@p",Your_UserPassword_TextBox.Text);
con.Open();
SqlDataReader dr = cmd_retrvefrmDB.ExecuteReader();
if (dr.Read())
{
         MessageBox.Show("User Logined. . .")
}
else
{
         MessageBox.Show("Invalid Username and Password. . .")
}