private void ExportDataAsRss(ViewPage page, DbDataReader reader, StreamWriter writer)
{
string appPath = Regex.Replace(HttpContext.Current.Request.Url.AbsoluteUri, "^(.+)Export.ashx.+$", "$1", RegexOptions.IgnoreCase);
XmlWriterSettings settings = new XmlWriterSettings();
settings.CloseOutput = false;
XmlWriter output = XmlWriter.Create(writer, settings);
output.WriteStartDocument();
output.WriteStartElement("rss");
output.WriteAttributeString("version", "2.0");
output.WriteStartElement("channel");
output.WriteElementString("title", ((string)(_view.Evaluate("string(concat(/c:dataController/@label, \' | \', @label))", Resolver))));
output.WriteElementString("lastBuildDate", DateTime.Now.ToString("r"));
output.WriteElementString("language", System.Threading.Thread.CurrentThread.CurrentCulture.Name.ToLower());
int rowCount = 0;
while ((rowCount < MaximumRssItems) && reader.Read())
{
output.WriteStartElement("item");
bool hasTitle = false;
bool hasPubDate = false;
StringBuilder desc = new StringBuilder();
for (int i = 0; (i < page.Fields.Count); i++)
{
DataField field = page.Fields[i];
if (!(field.Hidden) && field.Type != "DataView")
{
if (rowCount == 0)
{
field.NormalizeDataFormatString();
}
if (!(String.IsNullOrEmpty(field.AliasName)))
{
field = page.FindField(field.AliasName);
}
string text = String.Empty;
object v = reader[field.Name];
if (!(DBNull.Value.Equals(v)))
{
if (!(String.IsNullOrEmpty(field.DataFormatString)))
{
text = String.Format(field.DataFormatString, v);
}
else
{
text = Convert.ToString(v);
}
}
if (!(hasPubDate) && (field.Type == "DateTime"))
{
hasPubDate = true;
if (!(String.IsNullOrEmpty(text)))
{
output.WriteElementString("pubDate", ((DateTime)(reader[field.Name])).ToString("r"));
}
}
if (!(hasTitle))
{
hasTitle = true;
output.WriteElementString("title", text);
StringBuilder link = new StringBuilder();
link.Append(_config.Evaluate("string(/c:dataController/@name)"));
foreach (DataField pkf in page.Fields)
{
if (pkf.IsPrimaryKey)
{
link.Append(String.Format("&{0}={1}", pkf.Name, reader[pkf.Name]));
}
}
string itemGuid = String.Format("{0}Details.aspx?l={1}", appPath, HttpUtility.UrlEncode(Convert.ToBase64String(Encoding.Default.GetBytes(link.ToString()))));
output.WriteElementString("link", itemGuid);
output.WriteElementString("guid", itemGuid);
}
else
if (!(String.IsNullOrEmpty(field.OnDemandHandler)) && (field.OnDemandStyle == OnDemandDisplayStyle.Thumbnail))
{
if (text.Equals("1"))
{
desc.AppendFormat("{0}:<br /><img src=\"{1}Blob.ashx?{2}=t", HttpUtility.HtmlEncode(field.Label), appPath, field.OnDemandHandler);
foreach (DataField f in page.Fields)
{
if (f.IsPrimaryKey)
{
desc.Append("|");
desc.Append(reader[f.Name]);
}
}
desc.Append("\" style=\"width:92px;height:71px;\"/><br />");
}
}
else
{
desc.AppendFormat("{0}: {1}<br />", HttpUtility.HtmlEncode(field.Label), HttpUtility.HtmlEncode(text));
}
}
}
output.WriteStartElement("description");
output.WriteCData(String.Format("<span style=\\\"font-size:small;\\\">{0}</span>", desc.ToString()));
output.WriteEndElement();
output.WriteEndElement();
rowCount++;
}
output.WriteEndElement();
output.WriteEndElement();
output.WriteEndDocument();
output.Close();
}
private void ExportDataAsCsv(ViewPage page, DbDataReader reader, StreamWriter writer)
{
bool firstField = true;
for (int i = 0; (i < page.Fields.Count); i++)
{
DataField field = page.Fields[i];
if (!(field.Hidden) && (field.Type != "DataView"))
{
if (firstField)
{
firstField = false;
}
else
{
writer.Write(System.Globalization.CultureInfo.CurrentCulture.TextInfo.ListSeparator);
}
if (!(String.IsNullOrEmpty(field.AliasName)))
{
field = page.FindField(field.AliasName);
}
writer.Write("\"{0}\"", field.Label.Replace("\"", "\"\""));
}
field.NormalizeDataFormatString();
}
writer.WriteLine();
while (reader.Read())
{
firstField = true;
for (int j = 0; (j < page.Fields.Count); j++)
{
DataField field = page.Fields[j];
if (!(field.Hidden) && (field.Type != "DataView"))
{
if (firstField)
{
firstField = false;
}
else
{
writer.Write(System.Globalization.CultureInfo.CurrentCulture.TextInfo.ListSeparator);
}
if (!(String.IsNullOrEmpty(field.AliasName)))
{
field = page.FindField(field.AliasName);
}
string text = String.Empty;
object v = reader[field.Name];
if (!(DBNull.Value.Equals(v)))
{
if (!(String.IsNullOrEmpty(field.DataFormatString)))
{
text = String.Format(field.DataFormatString, v);
}
else
{
text = Convert.ToString(v);
}
writer.Write("\"{0}\"", text.Replace("\"", "\"\""));
}
else
{
writer.Write("\"\"");
}
}
}
writer.WriteLine();
}
}
private void ExportDataAsRowset(ViewPage page, DbDataReader reader, StreamWriter writer)
{
string s = "uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882";
string dt = "uuid:C2F41010-65B3-11d1-A29F-00AA00C14882";
string rs = "urn:schemas-microsoft-com:rowset";
string z = "#RowsetSchema";
XmlWriterSettings settings = new XmlWriterSettings();
settings.CloseOutput = false;
XmlWriter output = XmlWriter.Create(writer, settings);
output.WriteStartDocument();
output.WriteStartElement("xml");
output.WriteAttributeString("xmlns", "s", null, s);
output.WriteAttributeString("xmlns", "dt", null, dt);
output.WriteAttributeString("xmlns", "rs", null, rs);
output.WriteAttributeString("xmlns", "z", null, z);
// declare rowset schema
output.WriteStartElement("Schema", s);
output.WriteAttributeString("id", "RowsetSchema");
output.WriteStartElement("ElementType", s);
output.WriteAttributeString("name", "row");
output.WriteAttributeString("content", "eltOnly");
output.WriteAttributeString("CommandTimeout", rs, "60");
List <DataField> fields = new List <DataField>();
foreach (DataField field in page.Fields)
{
if (!((field.Hidden || (field.OnDemand || (field.Type == "DataView")))) && !(fields.Contains(field)))
{
DataField aliasField = field;
if (!(String.IsNullOrEmpty(field.AliasName)))
{
aliasField = page.FindField(field.AliasName);
}
fields.Add(aliasField);
}
}
int number = 1;
foreach (DataField field in fields)
{
field.NormalizeDataFormatString();
output.WriteStartElement("AttributeType", s);
output.WriteAttributeString("name", field.Name);
output.WriteAttributeString("number", rs, number.ToString());
output.WriteAttributeString("nullable", rs, "true");
output.WriteAttributeString("name", rs, field.Label);
output.WriteStartElement("datatype", s);
string type = RowsetTypeMap[field.Type];
string dbType = null;
if ("{0:c}".Equals(field.DataFormatString, StringComparison.CurrentCultureIgnoreCase))
{
dbType = "currency";
}
else
if (!(String.IsNullOrEmpty(field.DataFormatString)) && field.Type != "DateTime")
{
type = "string";
}
output.WriteAttributeString("type", dt, type);
output.WriteAttributeString("dbtype", rs, dbType);
output.WriteEndElement();
output.WriteEndElement();
number++;
}
output.WriteStartElement("extends", s);
output.WriteAttributeString("type", "rs:rowbase");
output.WriteEndElement();
output.WriteEndElement();
output.WriteEndElement();
// output rowset data
output.WriteStartElement("data", rs);
while (reader.Read())
{
output.WriteStartElement("row", z);
foreach (DataField field in fields)
{
object v = reader[field.Name];
if (!(DBNull.Value.Equals(v)))
{
if (!(String.IsNullOrEmpty(field.DataFormatString)) && !(((field.DataFormatString == "{0:d}") || (field.DataFormatString == "{0:c}"))))
{
output.WriteAttributeString(field.Name, String.Format(field.DataFormatString, v));
}
else
if (field.Type == "DateTime")
{
output.WriteAttributeString(field.Name, ((DateTime)(v)).ToString("s"));
}
else
{
output.WriteAttributeString(field.Name, v.ToString());
}
}
}
output.WriteEndElement();
}
output.WriteEndElement();
output.WriteEndElement();
output.WriteEndDocument();
output.Close();
}
