public override IDocument Render(IDictionary<string, object> context)
{
Debug.Assert(context != null);
Debug.Assert(this.engine != null);
if (context == null)
{
throw new ArgumentNullException("context");
}
//执行主要内容的渲染过程
using (var inStream = new MemoryStream(base.GetBuffer(), false))
using (var reader = new StreamReader(inStream, Encoding.UTF8))
using (var ws = new MemoryStream())
using (var writer = new StreamWriter(ws))
{
//执行渲染
this.engine.Evaluate(context, reader, writer);
writer.Flush();
ws.Flush();
var resultDoc = new ExcelMLTemplate();
resultDoc.PutBuffer(ws.ToArray());
return resultDoc;
}
}
internal void LoadFromDocument(ExcelMLTemplate doc)
{
Debug.Assert(doc != null);
var buf = doc.GetBuffer();
var newBuf = new byte[buf.Length];
Buffer.BlockCopy(buf, 0, newBuf, 0, buf.Length);
this.PutBuffer(newBuf);
}
public static void Compile(ExcelMLTemplate doc)
{
if (doc == null)
{
throw new ArgumentNullException("template");
}
var xml = doc.GetXmlDocument();
var nsmanager = new ExcelMLNamespaceManager(xml.NameTable);
nsmanager.LoadOpenDocumentNamespaces();
ClearTemplate(xml);
ProcessPlaceHolders(xml);
WriteCompiledMainContent(doc, xml);
}
private static void WriteCompiledMainContent(ExcelMLTemplate t, XmlDocument xml)
{
Debug.Assert(t != null);
Debug.Assert(xml != null);
using (var ms = new MemoryStream())
using (var writer = new ExcelMLTextWriter(ms))
{
writer.Formatting = Formatting.None; //对于 Velocity 模板，最好格式化
xml.WriteTo(writer);
writer.Flush();
ms.Flush();
t.PutBuffer(ms.ToArray());
}
}