Show hide controls inside Repeater based on extension using C# and VB.Net in ASP.Net

Hi merictokatlio...,

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

HTML

C# 

<asp:Repeater runat="server" ID="Repeater1">
    <ItemTemplate>
        <img src='<%# Eval("file_path") %>' runat="server" visible='<%# Eval("file_extention").ToString().ToLower() == "jpg" ? true : false %>' />
        <div runat="server" visible='<%# Eval("file_extention").ToString().ToLower() == "pdf" ? true : false %>'>
            <a href='<%# Eval("file_path") %>"'>Download Pdf</a>
        </div>
        <video src='<%# Eval("file_path") %>' runat="server" visible='<%# Eval("file_extention").ToString().ToLower() == "mp4" ? true : false %>' height="100" width="100"></video>
        <hr />
    </ItemTemplate>
</asp:Repeater>

VB.Net 

<asp:Repeater runat="server" ID="Repeater1">
    <ItemTemplate>
        <img src='<%# Eval("file_path") %>' runat="server" visible='<%# If(Eval("file_extention").ToString().ToLower() = "jpg", True, False) %>' />
        <div runat="server" visible='<%# If(Eval("file_extention").ToString().ToLower() = "pdf", True, False) %>'>
            <a href='<%# Eval("file_path") %>"'>Download Pdf</a>
        </div>
        <video src='<%# Eval("file_path") %>' runat="server" visible='<%# If(Eval("file_extention").ToString().ToLower() = "mp4", True, False) %>' height="100" width="100"></video>
        <hr />
    </ItemTemplate>
</asp:Repeater>

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        List<string> files = new List<string>();
        System.Data.DataTable dt = new System.Data.DataTable();
        dt.Columns.AddRange(new System.Data.DataColumn[]
        {
            new System.Data.DataColumn("file_name"),
            new System.Data.DataColumn("file_path"),
            new System.Data.DataColumn("file_extention")
        });
        dt.Rows.Add("Image", "Files/Test.jpg", "jpg");
        dt.Rows.Add("Video", "Files/Test.mp4", "mp4");
        dt.Rows.Add("PDF", "Files/Test.pdf", "pdf");
        Repeater1.DataSource = dt;
        Repeater1.DataBind();
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim files As List(Of String) = New List(Of String)()
        Dim dt As Data.DataTable = New Data.DataTable()
        dt.Columns.AddRange(New Data.DataColumn() {
                            New Data.DataColumn("file_name"),
                            New Data.DataColumn("file_path"),
                            New Data.DataColumn("file_extention")})
        dt.Rows.Add("Image", "Files/Test.jpg", "jpg")
        dt.Rows.Add("Video", "Files/Test.mp4", "mp4")
        dt.Rows.Add("PDF", "Files/Test.pdf", "pdf")
        Repeater1.DataSource = dt
        Repeater1.DataBind()
    End If
End Sub