Hi Tevin,

For Upload and save binary data in database refer below article.

Display Binary Image from database in ASP.Net GridView control using C# and VB.Net

Check this example. Now please take its reference and correct your code.

HTML

<asp:TextBox runat="server" ID="txtId" />
<asp:Button Text="Search" runat="server" ID="btnSearch" OnClick="Search" />
<br /><br />
<table>
    <tr>
        <td>Id</td>
        <td><asp:Label ID="lblID" runat="server" /></td>
    </tr>
    <tr>
        <td>Name</td>
        <td><asp:TextBox runat="server" ID="txtName" /></td>
    </tr>
    <tr>
        <td>Photo</td>
        <td><asp:Image ID="imgPhoto" runat="server" /></td>
    </tr>
</table>
<br />
<asp:Button Text="Save" runat="server" ID="btnSave" OnClick="Save" />

Namespaces

C#

using System.Configuration;
using System.Data;
using System.Data.SqlClient;

VB.Net

Imports System.Configuration
Imports System.Data
Imports System.Data.SqlClient

Code

C#

protected void Search(object sender, EventArgs e)
{
    string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT id,Name,Data FROM tblFiles WHERE id = @Id"))
        {
            cmd.Parameters.AddWithValue("@Id", txtId.Text.Trim());
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.CommandType = CommandType.Text;
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                DataTable dt = new DataTable();
                sda.Fill(dt);
                if (dt.Rows.Count > 0)
                {
                    lblID.Text = dt.Rows[0]["id"].ToString();
                    txtName.Text = dt.Rows[0]["Name"].ToString();
                    byte[] bytes = (byte[])dt.Rows[0]["Data"];
                    string base64String = Convert.ToBase64String(bytes, 0, bytes.Length);
                    imgPhoto.ImageUrl = "data:image/png;base64," + base64String;
                }
            }
        }
    }
}

protected void Save(object sender, EventArgs e)
{
    string name = txtName.Text.Trim();
    string contentType = "image/jpeg";
    byte[] data = Convert.FromBase64String(imgPhoto.ImageUrl.Replace("data:image/png;base64,", ""));
    string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("INSERT INTO tblFiles (Name,ContentType,Data) VALUES(@Name,@ContentType,@Data)"))
        {
            cmd.Parameters.AddWithValue("@Name", name);
            cmd.Parameters.AddWithValue("@ContentType", contentType);
            cmd.Parameters.AddWithValue("@Data", data);
            con.Open();
            cmd.ExecuteNonQuery();
            con.Close();
        }
    }
}

VB.Net

Protected Sub Search(ByVal sender As Object, ByVal e As EventArgs)
    Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(constr)
        Using cmd As SqlCommand = New SqlCommand("SELECT id,Name,Data FROM tblFiles WHERE id = @Id")
            cmd.Parameters.AddWithValue("@Id", txtId.Text.Trim())
            Using sda As SqlDataAdapter = New SqlDataAdapter()
                cmd.CommandType = CommandType.Text
                cmd.Connection = con
                sda.SelectCommand = cmd
                Dim dt As DataTable = New DataTable()
                sda.Fill(dt)
                If dt.Rows.Count > 0 Then
                    lblID.Text = dt.Rows(0)("id").ToString()
                    txtName.Text = dt.Rows(0)("Name").ToString()
                    Dim bytes As Byte() = CType(dt.Rows(0)("Data"), Byte())
                    Dim base64String As String = Convert.ToBase64String(bytes, 0, bytes.Length)
                    imgPhoto.ImageUrl = "data:image/png;base64," & base64String
                End If
            End Using
        End Using
    End Using
End Sub

Protected Sub Save(ByVal sender As Object, ByVal e As EventArgs)
    Dim name As String = txtName.Text.Trim()
    Dim contentType As String = "image/jpeg"
    Dim data As Byte() = Convert.FromBase64String(imgPhoto.ImageUrl.Replace("data:image/png;base64,", ""))
    Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(constr)
        Using cmd As SqlCommand = New SqlCommand("INSERT INTO tblFiles (Name,ContentType,Data) VALUES(@Name,@ContentType,@Data)")
            cmd.Parameters.AddWithValue("@Name", name)
            cmd.Parameters.AddWithValue("@ContentType", contentType)
            cmd.Parameters.AddWithValue("@Data", data)
            con.Open()
            cmd.ExecuteNonQuery()
            con.Close()
        End Using
    End Using
End Sub