/// <summary>合并</summary>
/// <param name="context">上下文环境</param>
/// <param name="templatePath">模板相对路径</param>
/// <returns></returns>
public string Merge(VelocityContext context, string templatePath)
{
try
{
if (engine.TemplateExists(templatePath))
{
Template template = engine.GetTemplate(templatePath);
return(Merge(context, template));
}
else
{
return("Can't find \"" + templatePath + "\".");
}
}
catch
{
// 发生内部错误, 重启引擎.
instance = null;
engine = null;
return(string.Empty);
}
}
private Template ResolveMasterTemplate(string masterName)
{
Template masterTemplate = null;
if (!string.IsNullOrEmpty(masterName))
{
string targetMaster = Path.Combine(_masterFolder, masterName);
if (!Path.HasExtension(targetMaster))
{
targetMaster += ".vm";
}
if (!_engine.TemplateExists(targetMaster))
{
throw new InvalidOperationException("Could not find view for master template named " + masterName +
". I searched for '" + targetMaster + "' file. Maybe the file doesn't exist?");
}
masterTemplate = _engine.GetTemplate(targetMaster);
}
return(masterTemplate);
}
Template ResolveTemplate(string name)
{
if (!Path.HasExtension(name))
{
name += ".vm";
}
if (!velocityEngine.TemplateExists(name))
{
throw new InvalidOperationException(string.Format("Could not find a template named '{0}'", name));
}
return(velocityEngine.GetTemplate(name));
}
/// <summary>
/// 生成模板内容
/// </summary>
/// <param name="context">当前应用上下文</param>
/// <param name="view">模板文件</param>
/// <returns></returns>
public string ParseTemplate(VelocityContext context, string view)
{
string targetComponent = Path.Combine(componentFolder, view);
if (!engine.TemplateExists(targetComponent))
{
throw new InvalidOperationException("没有找到模板文件 '" + targetComponent + "'");
}
//加载模板
Template template = engine.GetTemplate(targetComponent);
StringWriter writer = new StringWriter();
template.Merge(context, writer);
return(writer.GetStringBuilder().ToString());
}