Not able to create guid with sql insert command

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Hi,

I need to auto generate a GUID for each user who has registered, but I am not able to do so it is giving me an error.
Below is the code which I have created in different class and I will call this method on button click.

Can someone please guide me.
I have never used GUID'S before but have understood it's concept.

C#

public class guid_for_user
{
        string ConnectionStrings;

        public guid_for_user(string ConString)
        {
            ConnectionStrings = ConString;
        }

        public  void  guid_for_users()
        {
            Guid g;
            g = Guid.NewGuid();

            SqlConnection cn = new SqlConnection(ConnectionStrings);

            SqlParameter user_GUID = new SqlParameter("user_guid", SqlDbType.UniqueIdentifier);
            user_GUID.Value = g;

            SqlCommand cmdd = new SqlCommand("INSERT INTO u_security(user_guid) VALUES (g)", cn);
            cmdd.Parameters.Add(user_GUID);

            cn.Open();
            cmdd.ExecuteNonQuery();
            cn.Close();
       }
}

Thanks in advance.

Posted 31-Mar-12 23:00pm

Member 7849477

Updated 1-Apr-12 0:24am

André Kraak

v2

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André Kraak 1-Apr-12 6:24am

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Shmuel Zang · Accepted Answer · 2012-03-31T23:23:00

Solution 1

You have to set the name of the parameter (instead of g) in the SqlCommand. Something like:

C#

SqlParameter user_GUID = new SqlParameter("@user_guid", SqlDbType.UniqueIdentifier);
user_GUID.Value = g;
 
SqlCommand cmdd = new SqlCommand("INSERT INTO u_security(user_guid) VALUES (@user_guid)", cn);
cmdd.Parameters.Add(user_GUID);

Posted 31-Mar-12 23:23pm

Shmuel Zang

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Member 7849477 1-Apr-12 5:39am

thanks a lot!! it worked....