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    <p>thank you!!! my solution now is : </p> <pre><code>public void SaveFile() { //Try OpenFileDialog fd = new OpenFileDialog(); fd.Filter = "pdf file|*.pdf"; if (fd.ShowDialog == System.Windows.Forms.DialogResult.OK) { //PdfDocument1.FilePath = fd.FileName byte[] filebyte = null; SqlConnection con = new SqlConnection("Data Source=LOCALHOS-A4AE79\\LOCALHOST1;Initial Catalog=library_alborz;Integrated Security=True"); SqlCommand cmd = default(SqlCommand); filebyte = System.IO.File.ReadAllBytes(fd.FileName); cmd = new SqlCommand("Insert into pdftbl ( pdffld ) Values(@pdf)", con); //cmd.Parameters.Add("@filepath", SqlType.VarChar).Value = txtfilepath.Text cmd.Parameters.Add("@pdf", SqlDbType.Binary).Value = filebyte; con.Open(); cmd.ExecuteNonQuery(); con.Close(); Interaction.MsgBox("File saved into database", MsgBoxStyle.Information); //Catch ex As Exception // MsgBox(Err.Description, MsgBoxStyle.Exclamation) //End Try } } ------------ // load pdf file private void Button2_Click(System.Object sender, System.EventArgs e) { string strsql = null; SqlConnection con = new SqlConnection("Data Source=LOCALHOS-A4AE79\\LOCALHOST1;Initial Catalog=library_alborz;Integrated Security=True"); SqlDataAdapter da = new SqlDataAdapter(); DataSet ds = new DataSet(); try { strsql = "select pdffld from pdftbl "; da = new SqlDataAdapter(strsql, con); da.Fill(ds, "tbl"); //Get image data from gridview column. byte[] pdfData = Convert.ToByte(ds.Tables["tbl"].Rows[0][0]); //Initialize pdf variable //Read pdf data into a memory stream using (MemoryStream ms = new MemoryStream(pdfData, 0, pdfData.Length)) { ms.Write(pdfData, 0, pdfData.Length); //Set pdf variable value using memory stream. PdfDocument1.Load(ms); PdfPageView1.Document = PdfDocument1; PdfPageView1.Refresh(); } } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } </code></pre>
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