Question

我为我的digitalPersona设备下载了一个注册示例代码供我们使用。它可能已经注册并验证指纹，但问题是它将指纹.fpt文件保存在文件夹中。我想将它保存在数据库中。

这是我到目前为止已经尝试过的。

private void SaveButton_Click(object sender, EventArgs e)
        {
            SaveFileDialog save = new SaveFileDialog();
            save.Filter = "Fingerprint Template File (*.fpt)|*.fpt";
            if (save.ShowDialog() == DialogResult.OK)

                using (FileStream fs = File.Open(save.FileName, FileMode.Create, FileAccess.Write))
                {
                    Template.Serialize(fs);

                    fs.Close();

                //Read the file and convert it to byte array
                string filePath = save.FileName;
                string filename = Path.GetFileName(filePath);
                FileStream fst = new FileStream(filePath, FileMode.Open, FileAccess.Read);
                BinaryReader br = new BinaryReader(fst);
                Byte[] bytes = br.ReadBytes((Int32)fst.Length);
                br.Close();
                fst.Close();


                //Insert the file into database
                SqlConnection cn = new SqlConnection("Data Source=10.115.5.3; Initial Catalog=EnrollmentSampledb;Integrated Security=SSPI;");
                SqlCommand cmd = new SqlCommand("INSERT INTO tblUser VALUES(@ID_NUMBER, @FIRSTNAME, @LASTNAME, @FINGERPRINT, @DATE_ADDED, @DATE_MODIFIED)", cn);
                cmd.Parameters.Add("ID_NUMBER", SqlDbType.NVarChar).Value = tboxIdNum.Text;
                cmd.Parameters.Add("FIRSTNAME", SqlDbType.NVarChar).Value = tboxFname.Text;
                cmd.Parameters.Add("LASTNAME", SqlDbType.NVarChar).Value = tboxLname.Text;
                cmd.Parameters.Add("FINGERPRINT", SqlDbType.Image).Value = bytes;
                cmd.Parameters.Add("DATE_ADDED", SqlDbType.DateTime).Value = DateTime.Now;
                cmd.Parameters.Add("DATE_MODIFIED", SqlDbType.DateTime).Value = DateTime.Now;

                cn.Open(); cmd.ExecuteNonQuery();
                cn.Close();

            }

            tboxIdNum.Text = "";
            tboxFname.Text = "";
            tboxLname.Text = "";
        }

这个将指纹文件保存在数据库中，但首先需要将其保存在文件夹中。我想将它直接保存在数据库中，但我有点混淆如何做到这一点。我找不到要保存的文件。 T_T我很抱歉有点菜鸟。有人曾经这样做过吗？

Answer 1

未经测试，但我相信代码应如下所示。基本上，我们在将指纹数据写入MemoryStream之后替换0并将其位置设置回private void SaveButton_Click(object sender, EventArgs e) { MemoryStream fingerprintData = new MemoryStream(); Template.Serialize(fingerprintData); fingerprintData.Position = 0; BinaryReader br = new BinaryReader(fingerprintData); Byte[] bytes = br.ReadBytes((Int32)fingerprintData.Length); //Insert the file into database SqlConnection cn = new SqlConnection("Data Source=10.115.5.3; Initial Catalog=EnrollmentSampledb;Integrated Security=SSPI;"); SqlCommand cmd = new SqlCommand("INSERT INTO tblUser VALUES(@ID_NUMBER, @FIRSTNAME, @LASTNAME, @FINGERPRINT, @DATE_ADDED, @DATE_MODIFIED)", cn); cmd.Parameters.Add("ID_NUMBER", SqlDbType.NVarChar).Value = tboxIdNum.Text; cmd.Parameters.Add("FIRSTNAME", SqlDbType.NVarChar).Value = tboxFname.Text; cmd.Parameters.Add("LASTNAME", SqlDbType.NVarChar).Value = tboxLname.Text; cmd.Parameters.Add("FINGERPRINT", SqlDbType.Image).Value = bytes; cmd.Parameters.Add("DATE_ADDED", SqlDbType.DateTime).Value = DateTime.Now; cmd.Parameters.Add("DATE_MODIFIED", SqlDbType.DateTime).Value = DateTime.Now; cn.Open(); cmd.ExecuteNonQuery(); cn.Close(); tboxIdNum.Text = ""; tboxFname.Text = ""; tboxLname.Text = ""; }，以便可以回读数据并将其格式化以便存储，从而使其余代码保持完整（除了名称更改）

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如何使用digitalpersona sdk直接在数据库中保存指纹

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