//will be when click the table's tuple
        private void dgv_Document_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            //selected cell
            int chosen = dgv_Document.SelectedCells[0].RowIndex;
            //assign the data in the zeroth index to the fileID variable
            String fileID = dgv_Document.Rows[chosen].Cells[0].Value.ToString();
            //assign the data in the first index to the name variable
            String name = dgv_Document.Rows[chosen].Cells[1].Value.ToString();
            //assign the data in the second index to the path variable
            String path = dgv_Document.Rows[chosen].Cells[2].Value.ToString();
            //assign the data in the fourth index to the userID variable
            String userID = dgv_Document.Rows[chosen].Cells[4].Value.ToString();

            //transferring value from path to label
            labelFilePath.Text = path;
            //transferring value from name to combobox
            comboboxFileName.Text = name;
            //change font color
            comboboxFileName.ForeColor = Color.Black;
            //transferring value from userID to textbox
            textBoxUserID.Text = userID;
            //transferring value from fileID to textbox
            textBoxFileID.Text = fileID;

            //contact PDFForm
            PDFForm form = new PDFForm();

            //assigning the value in the label to a variable named filepathh in the PDFForm
            form.filePathh = labelFilePath.Text;
            //open the PDFForm
            form.ShowDialog();
        }
        //when the click this button;
        private void btn_browse_Click(object sender, EventArgs e)
        {
            //for open pdf files
            OpenFileDialog openPdf = new OpenFileDialog();

            openPdf.Title  = "Open PDF";
            openPdf.Filter = "PDF Files (*.Pdf) | *.Pdf";
            if (openPdf.ShowDialog() == DialogResult.OK)
            {
                textboxFilePath.Text = openPdf.FileName;
                //contact PDFForm
                PDFForm newform = new PDFForm();
                //assigning the value in the textbox to a variable named filepathh in the PDFForm
                newform.filePathh = textboxFilePath.Text;
                //open the PDFForm
                newform.ShowDialog();
            }
        }
        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            //selected cell
            int chosen = dataGridView1.SelectedCells[0].RowIndex;
            //assign the data in the zeroth index to the id variable
            String id = dataGridView1.Rows[chosen].Cells[0].Value.ToString();
            //assign the data in the first index to the name variable
            String name = dataGridView1.Rows[chosen].Cells[1].Value.ToString();
            //assign the data in the second index to the path variable
            String path = dataGridView1.Rows[chosen].Cells[2].Value.ToString();
            //assign the data in the third index to the date variable
            String date = dataGridView1.Rows[chosen].Cells[3].Value.ToString();
            //assign the data in the fourth index to the uid variable
            String uid = dataGridView1.Rows[chosen].Cells[4].Value.ToString();

            //transferring value from id to textbox
            textboxFileID.Text      = id;
            textboxFileID.ForeColor = Color.Black;
            //transferring value from name to textbox
            textboxFileName.Text      = name;
            textboxFileName.ForeColor = Color.Black;
            //transferring value from path to textbox
            textboxFilePath.Text      = path;
            textboxFilePath.ForeColor = Color.Black;
            //transferring value from uid to combobox
            comboboxUserID.Text      = uid;
            comboboxUserID.ForeColor = Color.Black;
            //transferring value from date to textbox
            textboxFileDate.Text      = date;
            textboxFileDate.ForeColor = Color.Black;

            //contact PDFForm
            PDFForm newForm = new PDFForm();

            //assigning the value in the textbox to a variable named filepathh in the PDFForm
            newForm.filePathh = textboxFilePath.Text;
            //open the PDFForm
            newForm.ShowDialog();
        }