When reporting Services reports are shown with ASP.NET Report Viewer control, one of the common requirements for exporting facility is, limiting it to few output formats. By default Export drop-down contains 7 output formats. If we need to limit for 1-2 output formats, one way is, hide the ExportControl and implement it with our own code. Here is the way of implementing it;

Here could be a sample screen for a ASP.NET page with reporting Services report. Note that ExportControl is hidden in the toolbar and drop-down is added to show output formats for exporting.

Write the code below for Page_Load.

protected void Page_Load(object sender, EventArgs e)
{
    ReportViewer1.ShowExportControls = false;
    ReportViewer1.ProcessingMode = ProcessingMode.Remote;
    // this can be set with control itself.
    //ReportViewer1.ServerReport.ReportServerUrl = new Uri(@"http://localhost/reportserver");
    //ReportViewer1.ServerReport.ReportPath = @"/Report Project1/Report2";
    if (!IsPostBack)
    {
        DropDownList1.Items.Add(new ListItem("Word", "Word"));
        DropDownList1.Items.Add(new ListItem("Excel", "Excel"));
        DropDownList1.Items.Add(new ListItem("Acrobat (PDF) file", "PDF"));
    }

}

Now, write the following code for Button-Click.
protected void Button1_Click(object sender, EventArgs e)
{
    string mimeType;
    string encoding;
    string fileNameExtension;
    string[] streams;
    Warning[] warnings;
    byte[] bytes = ReportViewer1.ServerReport.Render(DropDownList1.SelectedValue, null, out mimeType, out encoding, out fileNameExtension, out streams, out warnings);
    HttpContext.Current.Response.Buffer = true;
    HttpContext.Current.Response.Clear();
    HttpContext.Current.Response.ContentType = mimeType;
    HttpContext.Current.Response.AddHeader("content-disposition", "attachment; filename=SalesReport." + fileNameExtension);
    HttpContext.Current.Response.BinaryWrite(bytes);
    HttpContext.Current.Response.Flush();
    HttpContext.Current.Response.End();
}

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