How To Pass Profile Userid Into Stored Proc As A Parameter

Hi, I have created an insert stored procedure which inserts a userid into an sql server 2005 field of datatype uniqueidentifier.

What datatype would the parameter be in my c# code?

do i pass it in as an object datatype?

the code is below....

  1 conn = new SqlConnection(ConfigurationManager.ConnectionStrings["LocalSqlServer"].ConnectionString);
2
3 cmd = new SqlCommand("spInsKeyswap_history", conn);
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5 cmd.CommandType = CommandType.StoredProcedure;
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7 MembershipUser mu = Membership.GetUser(User.Identity.Name);
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9 object gdUserID = mu.ProviderUserKey;
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11
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15 cmd.Parameters.Add("@user_title", SqlDbType.VarChar, 50);
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17 cmd.Parameters.Add("@first_name", SqlDbType.VarChar, 20);
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19 cmd.Parameters.Add("@last_name", SqlDbType.VarChar, 50);
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21 cmd.Parameters.Add("@email", SqlDbType.VarChar, 50);
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23 cmd.Parameters.Add("@birthday", SqlDbType.VarChar, 15);
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25 cmd.Parameters.Add("@alternate_number", SqlDbType.VarChar, 50);
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27 cmd.Parameters.Add("@msisdn", SqlDbType.VarChar, 50);
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29 cmd.Parameters.Add("@call1", SqlDbType.VarChar, 50);
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31 cmd.Parameters.Add("@call2", SqlDbType.VarChar, 50);
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33 cmd.Parameters.Add("@call3", SqlDbType.VarChar, 50);
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35 cmd.Parameters.Add("@new_sim_msidn", SqlDbType.VarChar, 50);
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37 cmd.Parameters.Add("@dealer_id", SqlDbType.UniqueIdentifier);
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39 cmd.Parameters.Add("@status_code", SqlDbType.Int);
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41 cmd.Parameters.Add("@support_id", SqlDbType.Int);
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43 cmd.Parameters.Add("@return_value", SqlDbType.Int);
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45 cmd.Parameters["@user_title"].Value = txtTitle.Text.ToString();
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47 cmd.Parameters["@first_name"].Value = txtFirstName.Text.ToString();
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49 cmd.Parameters["@last_name"].Value = txtLastName.Text.ToString();
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51 cmd.Parameters["@email"].Value = txtEmailAddress.Text.ToString();
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53 cmd.Parameters["@birthday"].Value = txtBirthday.Text;
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55 cmd.Parameters["@alternate_number"].Value = txtAlternate.Text.ToString();
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57 cmd.Parameters["@msisdn"].Value = txtNew.Text.ToString();
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59 cmd.Parameters["@call1"].Value = txtCall1.Text.ToString();
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61 cmd.Parameters["@call2"].Value = txtCall2.Text.ToString();
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63 cmd.Parameters["@call3"].Value = txtCall3.Text.ToString();
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65 cmd.Parameters["@new_sim_msidn"].Value = txtOld.Text.ToString();
66
67 //get logged in users user_id from membership
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69 cmd.Parameters["@dealer_id"].Value = gdUserID;
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71 cmd.Parameters["@status_code"].Value = 1;
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73 cmd.Parameters["@support_id"].Value = 0;
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75
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77 cmd.Parameters["@return_value"].Direction = ParameterDirection.ReturnValue;
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79 cmd.ExecuteNonQuery();
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81 int returnValue = (int)cmd.Parameters["@return_value"].Value;
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83 conn.Open();
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86