How can I use crystal report to show 1 user to print

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C#

MS-Access

hello
i want to print 1 record on my data gird view to the crystal report but i don't know how to do that i tried some methods but i only got to print all the data

What I have tried:

so this is my code to the crystal report

private void Print_Click(object sender, EventArgs e)
       {

           Print print = new Print();
           print.ShowDialog();
           if (conect.State!=ConnectionState.Open)
           {
               conect.Open();
           }
           string cs = "select * from Sign_Up";
           OleDbCommand command = new OleDbCommand(cs,conect);
           OleDbDataAdapter adap = new OleDbDataAdapter(command);
           DataSet dt = new DataSet();
           adap.Fill(dt, "Sign_Up");
           CrystalReport1 crs1 = new CrystalReport1();
           crs1.SetDataSource(dt);
           print.crystalReportViewer1.ReportSource = crs1;
           conect.Close();
           print.crystalReportViewer1.Refresh();

it print all the data in the data grid view but i want to print the user i chose
i am useing access data base
any one have suggestions ?
thanks