/// <summary>
/// 添加标签属性时的触发函数.用于设置自身的某些属性值
/// </summary>
/// <param name="name"></param>
/// <param name="item"></param>
protected override void OnAddingAttribute(string name, Attribute item)
{
switch (name)
{
case "from":
VariableExpression ve = item.Value as VariableExpression;
if (ve == null && this.OwnerDocument.DocumentConfig.CompatibleMode)
{
ve = ParserHelper.CreateVariableExpression(this.OwnerTemplate, item.Text);
}
this.From = ve;
break;
case "item":
this.Item = ParserHelper.CreateVariableIdentity(this.OwnerTemplate, item.Text);
break;
case "index":
this.Index = ParserHelper.CreateVariableIdentity(this.OwnerTemplate, item.Text);
break;
}
}
/// <summary>
/// 输出表达式的原字符串数据
/// </summary>
/// <returns></returns>
public override string ToString()
{
StringBuilder buffer = new StringBuilder();
buffer.Append(this.VariableId.ToString());
VariableExpression exp = this;
while (exp != null)
{
if (!string.IsNullOrEmpty(exp.FieldName))
{
buffer.Append(".");
buffer.Append(exp.FieldName);
if (exp.IsMethod)
{
buffer.Append("()");
}
}
exp = exp.NextExpression;
}
return(buffer.ToString());
}