Hide (Disable) specific export option in ReportViewer from Export button

Hi nauna,

I have created sample that full fill your requirement.

HTML

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
Hide Export Option:
<asp:RadioButtonList runat="server" ID="rbExportOptions" RepeatDirection="Horizontal"
    AutoPostBack="true" OnSelectedIndexChanged="rbExportOptions_SelectedIndexChanged">
    <asp:ListItem Text="None" Value="None" />
    <asp:ListItem Text="Excel" Value="Excel" />
    <asp:ListItem Text="PDF" Value="PDF" />
    <asp:ListItem Text="Word" Value="Word" />
</asp:RadioButtonList>
<rsweb:ReportViewer ID="ReportViewer1" runat="server" Width="600">
</rsweb:ReportViewer>

Code

string exportOption;
protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        rbExportOptions.SelectedIndex = 0;
        BindReport();
    }
    exportOption = rbExportOptions.SelectedItem.Text.Trim();
}

private void BindReport()
{
    ReportViewer1.ProcessingMode = ProcessingMode.Local;
    ReportViewer1.LocalReport.ReportPath = Server.MapPath("~/Report.rdlc");
    Customers dsCustomers = GetData("select top 20 * from customers");
    ReportDataSource datasource = new ReportDataSource("Customers", dsCustomers.Tables[0]);
    ReportViewer1.LocalReport.DataSources.Clear();
    ReportViewer1.LocalReport.DataSources.Add(datasource);
}

private Customers GetData(string query)
{
    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    SqlCommand cmd = new SqlCommand(query);
    using (SqlConnection con = new SqlConnection(conString))
    {
        using (SqlDataAdapter sda = new SqlDataAdapter())
        {
            cmd.Connection = con;

            sda.SelectCommand = cmd;
            using (Customers dsCustomers = new Customers())
            {
                sda.Fill(dsCustomers, "DataTable1");
                return dsCustomers;
            }
        }
    }
}

public void DisableExportOption(ReportViewer ReportViewerID, string strFormatName)
{
    exportOption = rbExportOptions.SelectedItem.Text.Trim();
    foreach (RenderingExtension extension in ReportViewerID.LocalReport.ListRenderingExtensions())
    {
        if (extension.Name.ToLower() == strFormatName.ToLower())
        {
            FieldInfo info = extension.GetType().GetField("m_isVisible", BindingFlags.Instance | BindingFlags.NonPublic);
            info.SetValue(extension, false);
        }
    }
}

public void RefreshReport(ReportViewer ReportViewerID)
{
    ReportViewerID.Reset();
    BindReport();
}

protected void rbExportOptions_SelectedIndexChanged(object sender, EventArgs e)
{
    RefreshReport(ReportViewer1);
    DisableExportOption(ReportViewer1, exportOption);
}

Screenshot