Hi RichardSa,

Refer below sample.

Database

CREATE TABLE [dbo].[tblFiles](
	[id] [int] IDENTITY(1,1) NOT NULL,
	[Name] [varchar](50) NOT NULL,
	[ContentType] [nvarchar](200) NOT NULL,
	[Data] [varbinary](max) NULL,
 CONSTRAINT [PK_tblFiles] PRIMARY KEY CLUSTERED 
(
	[id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, OPTIMIZE_FOR_SEQUENTIAL_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

I have inserted few record in the table.

For more details on insert refer below article.

How to save ( insert ) Image in Database in ASP.Net using C# and VB.Net

HTML

<div class="container-fluid">
    <div class="row">
        <asp:Repeater ID="RepDetails" runat="server" OnItemDataBound="RepDetails_ItemDataBound">
            <ItemTemplate>
                <asp:TableRow>
                    <asp:TableCell>
                        <div class="col-md-5" style="max-width: 100%; height: auto;">
                            <asp:Label ID="lblName" runat="server" Text='<%# Eval("Name") %>' /><br />
                            <asp:Image ID="Image1" runat="server" Height="100%" Width="100%" />
                            <hr />
                        </div>
                    </asp:TableCell>
                </asp:TableRow>
            </ItemTemplate>
        </asp:Repeater>
    </div>

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 Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        string query = "SELECT * FROM tblFiles WHERE ContentType = 'image/jpeg'";
        SqlCommand cmd = new SqlCommand(query);
        using (SqlConnection con = new SqlConnection(conString))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                DataTable dt = new DataTable();
                sda.Fill(dt);
                RepDetails.DataSource = dt;
                RepDetails.DataBind();
            }
        }
    }
}

protected void RepDetails_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        Image img = e.Item.FindControl("Image1") as Image;
        DataRowView dr = (DataRowView)e.Item.DataItem;
        if (!Convert.IsDBNull(dr["Data"]))
        {
            img.Visible = true;
            img.ImageUrl = "data:image/jpg;base64," + Convert.ToBase64String((byte[])dr["Data"]);
        }
        else
        {
            img.Visible = false;
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not IsPostBack Then
        Dim conString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
        Dim query As String = "SELECT * FROM tblFiles WHERE ContentType = 'image/jpeg'"
        Dim cmd As SqlCommand = New SqlCommand(query)
        Using con As SqlConnection = New SqlConnection(conString)
            Using sda As SqlDataAdapter = New SqlDataAdapter()
                cmd.Connection = con
                sda.SelectCommand = cmd
                Dim dt As DataTable = New DataTable()
                sda.Fill(dt)
                RepDetails.DataSource = dt
                RepDetails.DataBind()
            End Using
        End Using
    End If
End Sub

Protected Sub RepDetails_ItemDataBound(ByVal sender As Object, ByVal e As RepeaterItemEventArgs)
    If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then
        Dim img As Image = TryCast(e.Item.FindControl("Image1"), Image)
        Dim dr As DataRowView = CType(e.Item.DataItem, DataRowView)
        If Not Convert.IsDBNull(dr("Data")) Then
            img.Visible = True
            img.ImageUrl = "data:image/jpg;base64," & Convert.ToBase64String(CType(dr("Data"), Byte()))
        Else
            img.Visible = False
        End If
    End If
End Sub

Screenshot