void menuItem_integerContent_Click(object sender,
EventArgs e)
{
TreeNode node = this.treeView_ber.SelectedNode;
if (node == null)
{
MessageBox.Show(this, "尚未选定节点");
return;
}
BerNode bernode = (BerNode)node.Tag;
MessageBox.Show(this, "'" + bernode.GetIntegerNodeData().ToString() + "'");
}
// 解码RPN结构中的Attribute + Term结构
static int DecodeAttributeAndTerm(
Encoding term_encoding,
BerNode pNode,
out long lAttributeType,
out long lAttributeValue,
out string strTerm,
out string strError)
{
lAttributeType = 0;
lAttributeValue = 0;
strTerm = "";
strError = "";
if (pNode == null)
{
strError = "node == null";
return(-1);
}
if (pNode.ChildrenCollection.Count < 2) //attriblist + term
{
strError = "bad RPN query";
return(-1);
}
BerNode pAttrib = pNode.ChildrenCollection[0]; // attriblist
BerNode pTerm = pNode.ChildrenCollection[1]; // term
if (44 != pAttrib.m_uTag) // Attributes
{
strError = "only support Attributes";
return(-1);
}
if (45 != pTerm.m_uTag) // Term
{
strError = "only support general Term";
return(-1);
}
// get attribute type and value
if (pAttrib.ChildrenCollection.Count < 1) //attribelement
{
strError = "bad RPN query";
return(-1);
}
pAttrib = pAttrib.ChildrenCollection[0];
if (16 != pAttrib.m_uTag) //attribelement (SEQUENCE)
{
strError = "only support Attributes";
return(-1);
}
for (int i = 0; i < pAttrib.ChildrenCollection.Count; i++)
{
BerNode pTemp = pAttrib.ChildrenCollection[i];
switch (pTemp.m_uTag)
{
case 120: // attributeType
lAttributeType = pTemp.GetIntegerNodeData();
break;
case 121: // attributeValue
lAttributeValue = pTemp.GetIntegerNodeData();
break;
}
}
// get term
strTerm = pTerm.GetCharNodeData(term_encoding);
if (-1 == lAttributeType ||
-1 == lAttributeValue ||
String.IsNullOrEmpty(strTerm) == true)
{
strError = "bad RPN query";
return(-1);
}
return(0);
}