how to define and insert the multiple image path into database

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C#

ASP.NET

I have developing a page and want to insert the input1 and input2 from each different fields into the database column. I want insert the 2 image paths into 2 different column, such as input1 from field1 insert into column 1 and inout2 from field2 will insert into column 2. If I dont want upload image1 and only upload image2, image2 also will inserting into the column2. How to define them as in array?

<form id="form1" method="post" enctype="multipart/form-data" runat="server">
First Name : * <asp:TextBox ID="txtFirstName" runat="server" Width="200" EnableViewState="false"></asp:TextBox><br />
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Please fill in your first name" ControlToValidate="txtFirstName" SetFocusOnError="true" ValidationGroup="fileUploadForm"></asp:RequiredFieldValidator>
<br>Last Name : * <asp:TextBox id="txtLastName" runat="server" Width="200" EnableViewState="false"></asp:TextBox><br />
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="Please fill in your last name" ControlToValidate="txtLastName" SetFocusOnError="true" ValidationGroup="fileUploadForm"></asp:RequiredFieldValidator><br/>
Email : * <asp:TextBox id="txtEmail" runat="server" Width="200" EnableViewState="false"></asp:TextBox><br />
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="Please fill in your Email" ControlToValidate="txtEmail" SetFocusOnError="true" ValidationGroup="fileUploadForm"></asp:RequiredFieldValidator>
<br/>Photo 1 To Upload : * <asp:FileUpload  ID="File1" runat="server"  /><br />
    <asp:CustomValidator ID="CustomValidator1" runat="server"
 ControlToValidate="File1" ErrorMessage="File must be less than 10MB" OnServerValidate="ValidateUploadedFile"></asp:CustomValidator>
<br>Photo 2 To Upload : *</td>
<asp:FileUpload  ID="File2" runat="server"  /><br />
    <asp:CustomValidator ID="CustomValidator2" runat="server"
 ControlToValidate="File2" ErrorMessage="File must be less than 10MB" OnServerValidate="ValidateUploadedFile2"></asp:CustomValidator>
 <input id="btnSubmit" type="submit" value="Upload Photo File" name="cmdUploadPhoto" runat="server" onserverclick="Submit"/>

</form>

protected void Page_Load(object sender, EventArgs e)
        {
        }
        bool mPassedValidation = false;
        protected System.Data.SqlClient.SqlConnection sqlConn;
        protected System.Data.SqlClient.SqlCommand sqlCmd;
        protected void Submit(object sender, EventArgs e)
        {
            string[] arrayFilePaths = new string[2];
            arrayFilePaths[0] = string.Empty;
            arrayFilePaths[1] = string.Empty;
            if (mPassedValidation)
            {
                HttpFileCollection hfc = Request.Files;
                for (int i = 0; i < hfc.Count; i++)
                {
                    HttpPostedFile hpf = hfc[i];
                    if (hpf.ContentLength > 0)
                    {
                        string fn = txtFirstName.Text + "_" + Path.GetFileNameWithoutExtension(hpf.FileName) +
                        "_" + Guid.NewGuid() + Path.GetExtension(hpf.FileName);
                        string serverPath = Server.MapPath("./data/" + fn);
                        hpf.SaveAs(serverPath);
                        arrayFilePaths[i] = serverPath;
                    }
                }
                string sqlStrFilePaths = "'{0}','{1}'";
                sqlStrFilePaths = string.Format(sqlStrFilePaths, arrayFilePaths[0], arrayFilePaths[1]);
                ConnectionStringSettings cs = ConfigurationManager.ConnectionStrings["MyConnectionString"];
                string connString = cs.ConnectionString;
                SqlConnection sqlConn = new SqlConnection(connString);
                sqlConn.Open();
                string sSQL = "INSERT INTO tbHPDigitalPrint2011(FirstName,LastName,Email,PhotoFileName,VideoFileName,RegDate)" +
                    "VALUES ('" + txtFirstName.Text + "','" + txtLastName.Text + "', '" + txtEmail.Text + "', '" + sqlStrFilePaths + "', getDate())";

                SqlCommand objCmd = new SqlCommand(sSQL, sqlConn);
                try
                {
                    objCmd.ExecuteNonQuery();
                    Response.Redirect("thanks.aspx");
                }
                catch (System.Exception ex)
                {
                    ErrorMsg.Text += "<font color=red>An exception of type " + ex.GetType() + " was encountered while inserting the data.<BR>";
                    ErrorMsg.Text += "Message: " + ex.Message + "<BR>";
                    ErrorMsg.Text += "Record was not written to database.<BR><BR></font>";
                }
                finally
                {
                    sqlConn.Close();
                }

            }
        }

        protected void ValidateUploadedFile(object source, ServerValidateEventArgs args)
        {
            if (File1.HasFile)
            {
                HttpPostedFile postedfile = File1.PostedFile;
                int fileLength = postedfile.ContentLength;
                if (string.Compare(Path.GetExtension(File1.PostedFile.FileName), ".zip", true) != 0)
                {
                    CustomValidator1.ErrorMessage = "The uploading file must be a zip file";
                    args.IsValid = false;
                    mPassedValidation = false;
                }
                else if (fileLength > 10 * 1024 * 1024)
                {
                    CustomValidator1.ErrorMessage = "The uploading file must be less than 10MB";
                    args.IsValid = false;
                    mPassedValidation = false;
                }
                else
                {
                    args.IsValid = true;
                    mPassedValidation = true;
                }
            }
        }