<table>
    <tr>
        <td style="padding-right: 4px">
            <dx:ASPxButton ID="btnPdfExport" runat="server" Text="Export to PDF" OnClick="btnPdfExport_Click" />
        </td>
        <td style="padding-right: 4px">
            <dx:ASPxButton ID="btnXlsExport" runat="server" Text="Export to XLS" OnClick="btnXlsExport_Click" />
        </td>
        <td style="padding-right: 4px">
            <dx:ASPxButton ID="btnXlsxExport" runat="server" Text="Export to XLSX" OnClick="btnXlsxExport_Click" />
        </td>
        <td style="padding-right: 4px">
            <dx:ASPxButton ID="btnRtfExport" runat="server" Text="Export to RTF" OnClick="btnRtfExport_Click" />
        </td>
        <td>
            <dx:ASPxButton ID="btnCsvExport" runat="server" Text="Export to CSV" OnClick="btnCsvExport_Click" />
        </td>
    </tr>
</table>  
<dx:ASPxCardView ID="CardView1" runat="server" AutoGenerateColumns="False" DataSourceID="XmlDataSource1">
    <Columns>
        <dx:CardViewTextColumn Caption="Common Name" FieldName="Common_Name" VisibleIndex="0">
        </dx:CardViewTextColumn>
        <dx:CardViewTextColumn Caption="Species Name" FieldName="Species_Name" VisibleIndex="1">
        </dx:CardViewTextColumn>
        <dx:CardViewImageColumn Caption="Image" FieldName="ImagePath" VisibleIndex="2">
            <PropertiesImage ImageHeight="120px" ImageWidth="180px">
            </PropertiesImage>
        </dx:CardViewImageColumn>
    </Columns>
</dx:ASPxCardView>
<dx:ASPxCardViewExporter CardWidth="310" ID="CardViewExporter" CardViewID="CardView1" 
    OnRenderBrick="ASPxCardViewExporter1_RenderBrick" runat="server" />
<asp:XmlDataSource ID="XmlDataSource1" runat="server" DataFile="~/App_Data/Fishes.xml" />

using DevExpress.Web;

public partial class _Default : System.Web.UI.Page
{
    protected void ASPxCardViewExporter1_RenderBrick(object sender, DevExpress.Web.ASPxCardViewExportRenderingEventArgs e) {
        var dataColumn = e.Column as CardViewColumn;
        if (dataColumn != null && dataColumn.FieldName == "ImagePath")
            e.ImageValue = GetImageBinaryData(e.Value.ToString());
    }
    protected void btnPdfExport_Click(object sender, EventArgs e) {
        CardViewExporter.WritePdfToResponse();
    }
    protected void btnXlsExport_Click(object sender, EventArgs e) {
        CardViewExporter.WriteXlsToResponse();
    }
    protected void btnXlsxExport_Click(object sender, EventArgs e) {
        CardViewExporter.WriteXlsxToResponse();
    }
    protected void btnRtfExport_Click(object sender, EventArgs e) {
        CardViewExporter.WriteRtfToResponse();
    }
    protected void btnCsvExport_Click(object sender, EventArgs e) {
        CardViewExporter.WriteCsvToResponse();
    }
    byte[] GetImageBinaryData(string relativePath) {
        string path = Server.MapPath(relativePath);
        return File.Exists(path) ? File.ReadAllBytes(path) : null;
    }
}

Imports DevExpress.Web

Partial Public Class _Default
    Inherits System.Web.UI.Page

    Protected Sub ASPxCardViewExporter1_RenderBrick(ByVal sender As Object, ByVal e As DevExpress.Web.ASPxCardViewExportRenderingEventArgs)
        Dim dataColumn = TryCast(e.Column, CardViewColumn)
        If dataColumn IsNot Nothing AndAlso dataColumn.FieldName = "ImagePath" Then
            e.ImageValue = GetImageBinaryData(e.Value.ToString())
        End If
    End Sub
    Protected Sub btnPdfExport_Click(ByVal sender As Object, ByVal e As EventArgs)
        CardViewExporter.WritePdfToResponse()
    End Sub
    Protected Sub btnXlsExport_Click(ByVal sender As Object, ByVal e As EventArgs)
        CardViewExporter.WriteXlsToResponse()
    End Sub
    Protected Sub btnXlsxExport_Click(ByVal sender As Object, ByVal e As EventArgs)
        CardViewExporter.WriteXlsxToResponse()
    End Sub
    Protected Sub btnRtfExport_Click(ByVal sender As Object, ByVal e As EventArgs)
        CardViewExporter.WriteRtfToResponse()
    End Sub
    Protected Sub btnCsvExport_Click(ByVal sender As Object, ByVal e As EventArgs)
        CardViewExporter.WriteCsvToResponse()
    End Sub
    Private Function GetImageBinaryData(ByVal relativePath As String) As Byte()
        Dim path As String = Server.MapPath(relativePath)
        Return If(File.Exists(path), File.ReadAllBytes(path), Nothing)
    End Function
End Class