Read PDF file from sql to AxAcroPDF c#

Question

Some help?

 

I try this but dont work, no have errors but not read file...please help

 

{
            if (documentsDataGridView.SelectedRows.Count > 0)
            {

                string id = documentsDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn1"].Value.ToString();
                string number = documentsDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn2"].Value.ToString();
                string count_number = documentsDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn3"].Value.ToString();
                string label = documentsDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn4"].Value.ToString();
                string partner = documentsDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn5"].Value.ToString();
                string tax_number = documentsDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn6"].Value.ToString();
                string file_location = documentsDataGridView.SelectedRows[0].Cells["file_location"].Value.ToString();
                //string pdf_file = documentsDataGridView.SelectedRows[0].Cells["pdf_file"].Value.ToString();


                idTextBox.Text = id;
                numberTextBox.Text = number;
                count_numberTextBox.Text = count_number;
                labelTextBox.Text = label;
                partnerComboBox.Text = partner;
                tax_numberTextBox.Text = tax_number;
                dateDateTimePicker.Value = Convert.ToDateTime(documentsDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn7"].Value);
                file_locationTextBox.Text = file_location;
                //axAcroPDF1.src = pdf_file;



                try
                {
                    if (documentsDataGridView.SelectedRows[0].Cells["pdf_file"].Value != null)

                    {
                        byte[] ap = (byte[])(documentsDataGridView.SelectedRows[0].Cells["pdf_file"].Value);
                        MemoryStream ms = new MemoryStream(ap);
                        axAcroPDF1.src = LocalEncoding.GetString(ms.ToArray());
                        //axAcroPDF1.LoadFile(ms);


                    }
                    else
                    {
                        axAcroPDF1.src = null;
                    }
                }
                catch
                {
                    axAcroPDF1.src = null;
                }


            }
        }