Hi jilSoft,

Please refer below sample.

Database

I am making use of a table named Files whose schema is defined as follows.

For insert you can refer below article.

Upload and Display Images using Path stored in database in GridView in ASP.Net using C# and VB.Net

You can download the database table SQL by clicking the download link below.

Download SQL file

HTML

<div>
    <asp:ScriptManager runat="server" EnablePageMethods="true" />
    <img id="imgData" alt="Images" width="100" height="100" />
</div>

<script type="text/javascript">
    window.onload = function () {
        PageMethods.GetPath(function (response) {
            document.getElementById("imgData").src = response;
        });
    }
</script>

Namespaces

C#

using System.Data.SqlClient;
using System.Web.Services;
using System.Configuration;

VB.Net

Imports System.Data.SqlClient
Imports System.Web.Services
Imports System.Configuration

Code

C#

[WebMethod]
public static string GetPath()
{
    string path = string.Empty;
    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    string query = "SELECT TOP 1 Path FROM Files";
    using (SqlConnection con = new SqlConnection(conString))
    {
        using (SqlCommand cmd = new SqlCommand(query, con))
        {
            con.Open();
            path = Convert.ToString(cmd.ExecuteScalar());
            con.Close();
        }
    }

    return path;
}

VB.Net

<WebMethod>
Public Shared Function GetPath() As String
    Dim path As String = String.Empty
    Dim conString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Dim query As String = "SELECT TOP 1 Path FROM Files"
    Using con As SqlConnection = New SqlConnection(conString)
        Using cmd As SqlCommand = New SqlCommand(query, con)
            con.Open()
            path = Convert.ToString(cmd.ExecuteScalar())
            con.Close()
        End Using
    End Using

    Return path
End Function

Screenshot