How to display data in datagrid view of user logged in c# sql

Question

Hi I am having a problem when trying to update my datagrid view so that it displays only the data of the user who is logged in.

I have two tables, one called records and one called users. The users table contains user data including username and user id. the records table contains user id as a foreign key and data about bmi readings.

I have a login page which when logged in displays a message which is welcome (username)

This is the code I have written to update the datagridview

SqlConnection con = new SqlConnection(@(removed to simplify)); 

con.Open();

var sda = new SqlDataAdapter("SELECT * FROM Records WHERE UserID=@UserID", con);

sda.SelectCommand.Parameters.AddWithValue("@UserID", currentUsernameLabel.Text);

DataSet DATA = new dataGridView.DataSource = 

con.Close();

How do I look up what the userID is, (based on the username which is stored in currentUsernameLabel.Text) so that I can add it as a parameter?

EDIT: these are my tables:

Records table

---

Users table

---

Please let me know if you need anymore information in order to help

EDIT:

I have come up with the following solution:

//Find ID of user who is logged in
string currentUserID;
SqlConnection conn = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\n0740572\Projects\newest\CW\CW\Database1.mdf;Integrated Security=True");
SqlCommand command = new SqlCommand("select UserID from Users where Username = '"+currenUsernameLabel.Text+"' ", conn);
try
{
conn.Open();
SqlDataReader reader = command.ExecuteReader();
while(reader.Read())
{
currentUserID = reader["UserID"].ToString();
command.Parameters.AddWithValue("@CurrentUserID", currentUserID);
command.ExecuteNonQuery();
}
reader.Close();
} catch (SqlException ex)
{
MessageBox.Show(ex.Message);
} finally
{
conn.Close();
}

//update datagridview
this.recordsTableAdapter.ChartAll(this.recordsDataSet.Records);

}

The ChartAll query is as follows:

SELECT Height, Weight, BMI, Date FROM dbo.Records
WHERE UserID = @CurrentUserID

The error message is : Error message

Has it got something to do with needing the parameter to be an int not a string?

Answer 1

            var table = new DataTable("myTable");
        using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionstring"].ConnectionString))
        {
            using (var da = new SqlDataAdapter())
            {
                da.SelectCommand = new SqlCommand("SELECT * FROM Records", con);
                da.Fill(ds, "Records");
            }
        }
        dataGridViewPerson.DataSource = table.DefaultView;

get your connectionstring from the config file, change the code to match your code, otherwise you wont learn. aka use and fill a DataTable