Image Not Displaying well on gridview

<%@ Page Title="" Language="VB" MasterPageFile="~/Site.master" AutoEventWireup="false" CodeFile="Showemployeeinfo.aspx.vb" Inherits="Showemployeeinfo" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
        DataKeyNames="EmployeeID">
        <columns>
            <asp:BoundField DataField="EmployeeID" HeaderText="EmployeeID" ReadOnly="True" 
                SortExpression="EmployeeID" />
            <asp:BoundField DataField="First_Name" HeaderText="First_Name" 
                SortExpression="First_Name" />
            <asp:BoundField DataField="Last_Name" HeaderText="Last_Name" 
                SortExpression="Last_Name" />
            <asp:BoundField DataField="Guarantor_Name" HeaderText="Guarantor_Name" 
                SortExpression="Guarantor_Name" />
            <asp:BoundField DataField="Guarantor_Address" HeaderText="Guarantor Address" 
                SortExpression="Guarantor_Address" />
            <asp:BoundField DataField="Employee_Address" HeaderText="Employee_Address" 
                SortExpression="Employee_Address" />
              <asp:TemplateField HeaderText="Image">
    <itemtemplate>
    <asp:Image ID="Image1" runat="server" 
          ImageUrl='<%# Eval("EmployeeID", "~/ImageHandler.ashx?EmployeeID={0}")%>'/>
    </itemtemplate>
    
        </columns>

<%@ WebHandler Language="VB" Class="ImageHandler" %>

Imports System
Imports System.Web
Imports System.Data.SqlClient

Imports System.Configuration

Imports System.Data

Public Class ImageHandler : Implements IHttpHandler
    
    Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
        Dim EmployeeID As Integer = Convert.ToInt32(context.Request.QueryString("EmployeeID"))
        If EmployeeID > 0 Then
            context.Response.BinaryWrite(RetrieveEmployeeImage(EmployeeID))
            context.Response.[End]()
        End If
    End Sub
    Private Function RetrieveEmployeeImage(ByVal EmployeeID As Integer) As [Byte]()
        'fetch the connection string from web.config
        Dim connString As String = ConfigurationManager.ConnectionStrings("LordsBannerMotorsConnectionString1").ConnectionString

        'SQL statement to fetch thumbnail photo
        Dim sql As String = " SELECT * FROM Image WHERE EmployeeID=@EmployeeID"
        

        Dim dtEmployeePhoto As New DataTable()
        'Open SQL Connection
        Using conn As New SqlConnection(connString)
            conn.Open()
            'Initialize command object
            Using cmd As New SqlCommand(sql, conn)
                Dim adapter As New SqlDataAdapter(cmd)
                'Fill the result set
                adapter.Fill(dtEmployeePhoto)
            End Using
        End Using
        Return DirectCast(dtEmployeePhoto.Rows(0)(0), [Byte]())
    
    End Function
    
   
    Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
        Get
            Return False
        End Get
    End Property

End Class

  THIS IS THE CODE BEHIND FOR THE PAGE TO DISPLAY THE IMAGE
Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.UI
Imports System.Configuration


Partial Class Showemployeeinfo
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        If Not Page.IsPostBack Then
            BindData()
        End If
    End Sub
    Private Sub BindData()
        'Bind the grid view
        GridView1.DataSource = RetrieveImage()
        GridView1.DataBind()
    End Sub
    Private Function RetrieveImage() As DataSet
        'if products is available in the viewstate, use that
        'instead of fetching again from the database
        If ViewState("Image") IsNot Nothing Then
            Return DirectCast(ViewState("Image"), DataSet)
        End If
        'fetch the connection string from web.config
        Dim connectionString As String
        connectionString = ConfigurationManager.ConnectionStrings("LordsBannerMotorsConnectionString1").ConnectionString
        'SQL statement to fetch entries from products
        Dim sql As String = " SELECT * FROM Image "
        Dim dsImage As New DataSet()
        'Open SQL Connection
        Using conn As New SqlConnection(connectionString)
            conn.Open()
            'Initialize command object
            Using cmd As New SqlCommand(sql, conn)
                Dim adapter As New SqlDataAdapter(cmd)
                'Fill the result set
                adapter.Fill(dsImage)
            End Using
        End Using
        ViewState("Image") = dsImage
        Return dsImage
    End Function

    
End Class