Behind image in ASP.Net Repeater from code behind using C# and VB.Net

Hi ramco1917,

Please refer the below sample.

HTML

<asp:Repeater ID="rptData" runat="server" OnItemDataBound="OnItemDataBound">
    <ItemTemplate>
        <asp:Literal ID="ltrlSessionEndTime" runat="server" Text='<%# Eval("SessionEndTime","{0: HH:mm}") %>'></asp:Literal>
        <asp:Literal ID="ltrlBookTitle" runat="server" Text='<%# Eval("BookTitle") %>'></asp:Literal>
        <asp:Image ID="img" runat="server" Width="100" Height="100" />
        <asp:HiddenField ID="hfimg" runat="server" Value='<%# Eval("ThumbImage") %>' />
    </ItemTemplate>
</asp:Repeater>

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3]
        {
            new DataColumn("SessionEndTime", typeof(DateTime)),
            new DataColumn("BookTitle"),
            new DataColumn("ThumbImage")
        });
        dt.Rows.Add("17-2-2022 01:12", "History", "img/Picture1.png");
        rptData.DataSource = dt;
        rptData.DataBind();
    }
}

protected void OnItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        Image control = e.Item.FindControl("img") as Image;
        HiddenField control1 = e.Item.FindControl("hfimg") as HiddenField;
        control.ImageUrl = control1.Value;
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim dt As DataTable = New DataTable()
        dt.Columns.AddRange(New DataColumn(2) {
                            New DataColumn("SessionEndTime", GetType(DateTime)),
                            New DataColumn("BookTitle"),
                            New DataColumn("ThumbImage")})
        dt.Rows.Add("17-2-2022 01:12", "History", "img/Picture1.png")
        rptData.DataSource = dt
        rptData.DataBind()
    End If
End Sub

Protected Sub OnItemDataBound(ByVal sender As Object, ByVal e As RepeaterItemEventArgs)
    If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then
        Dim control As Image = TryCast(e.Item.FindControl("img"), Image)
        Dim control1 As HiddenField = TryCast(e.Item.FindControl("hfimg"), HiddenField)
        control.ImageUrl = control1.Value
    End If
End Sub