Re: i want to insert a new node regarding this code.but insert is not working.. - C# Discussion Boards

Re: i want to insert a new node regarding this code.but insert is not working..

4-Feb-08 0:04

private System.Windows.Forms.GroupBox grpbox;
XPathDocument dom;
XmlDocument doc;
XPathNavigator nav;
XPathExpression expr;
XPathNodeIterator iterator;
int cnt=0;
Label lbl;
TextBox txt;
OpenFileDialog dlg;
TreeNode newTreeNode;
//int cnt = e.Node.GetNodeCount(false);
//string filename;

private void Form1_Load(object sender, System.EventArgs e)
{
//label1.Text = "File Path";
//label1.SetBounds(8, 8, 50, 20);

//filename = Application.StartupPath + "\\Sample.xml";
//textBox1.Text= filename;
//textBox1.SetBounds(64, 8, 256, 20);
button1.Text = "Populate the TreeView with XML";
button1.SetBounds(8, 20, 200, 20);
treeXml.Height = 600;
treeXml.Width = 400;
grpbox = new GroupBox();
grpbox.Height = 600;
grpbox.Width = 400;
grpbox.SetBounds(500, 2, 700, 600);
grpbox.Visible = true;
grpbox.Dock.Equals(Right);
grpbox.Show();
this.Controls.Add(grpbox);

//dom = new XPathDocument(dlg.FileName);

}

private void ConvertXmlNodeToTreeNode(XmlNode xmlNode,
TreeNodeCollection treeNodes)
{

TreeNode newTreeNode = treeNodes.Add(xmlNode.Name);

switch (xmlNode.NodeType)
{
case XmlNodeType.ProcessingInstruction:
case XmlNodeType.XmlDeclaration:
newTreeNode.Text = "<?" + xmlNode.Name + " " +
xmlNode.Value + "?>";
break;
case XmlNodeType.Element:
if (xmlNode.Name.ToLower().Equals("node") == true)
{
newTreeNode.Text = "<" + xmlNode.Attributes["label"].Value.ToString() + ">";
}
else
newTreeNode.Text = "<" + xmlNode.Name + ">";
break;
case XmlNodeType.Attribute:

newTreeNode.Text = xmlNode.Name;

// newTreeNode.Text = "ATTRIBUTE: " + xmlNode.Name;
break;
case XmlNodeType.Text:
case XmlNodeType.CDATA:
newTreeNode.Text = xmlNode.Value;
break;
case XmlNodeType.Comment:
newTreeNode.Text = "";
break;
}

if (xmlNode.Attributes != null)
{
foreach (XmlAttribute attribute in xmlNode.Attributes)
{
ConvertXmlNodeToTreeNode(attribute, newTreeNode.Nodes);
}
}
foreach (XmlNode childNode in xmlNode.ChildNodes)
{
ConvertXmlNodeToTreeNode(childNode, newTreeNode.Nodes);
}
}

private void treeXml_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
{

cnt = e.Node.GetNodeCount(false);
grpbox.Controls.Clear();
for (int i = 0; i < cnt; i++)
{
Label lbl = new Label();
TextBox txt = new TextBox();
lbl.Text = e.Node.Text;
lbl.Left = 200;
lbl.Top = 200 * i;
txt.Left = 250;
txt.Top = 200 * i;
lbl.Show();
txt.Show();
grpbox.Controls.Add(txt);
grpbox.Controls.Add(lbl);

}

}

private void button1_Click(object sender, System.EventArgs e)
{
XmlDocument doc = new XmlDocument();
OpenFileDialog dlg = new OpenFileDialog();
treeXml.Nodes.Clear();

dlg.Title = "Open XML File";
dlg.Filter = "xml files (*.xml)|*.xml|All files (*.*)|*.*" ;
if (dlg.ShowDialog() == DialogResult.OK)
{
//imgPhoto.Image = new Bitmap(dlg.OpenFile());
doc.Load(dlg.OpenFile());
}

dlg.Dispose();

ConvertXmlNodeToTreeNode(doc, treeXml.Nodes);
treeXml.Nodes[0].ExpandAll();

}
// insert --- its not working
private void button2_Click(object sender, System.EventArgs e )
{
nav = doc.CreateNavigator();
expr = nav.Compile(dlg.FileName);
iterator = nav.Select(expr);
try
{
while (iterator.MoveNext())
{
XPathNavigator nav2 = iterator.Current.Clone();

}
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}

//XPathDocument dom=new XPathDocument();
try
{
XmlTextReader reader = new XmlTextReader(dlg.FileName);
//XmlDocument dom = new XmlDocument();
doc.Load(reader);
reader.Close();
XmlNode currNode;
XmlDocumentFragment docFrag = doc.CreateDocumentFragment();
for(int i=0;i< cnt;i++)
{

docFrag.InnerXml="<" + lbl.Text + ">" +

"<" + txt.Text + ">" ;

}

// insert the availability node into the document
currNode = doc.DocumentElement;
currNode.InsertAfter(docFrag, currNode.LastChild);
//save the output to a file
doc.Save(dlg.FileName);
this.DialogResult = DialogResult.OK;
}
catch (Exception ex)
{
Console.WriteLine ("Exception: {0}", ex.ToString());
this.DialogResult = DialogResult.Cancel;
}

}

private void button2_Click_1(object sender, System.EventArgs e)
{

}

private void button3_Click(object sender, System.EventArgs e)
{

}
}
}

Guffa4-Feb-08 1:21

Guffa

4-Feb-08 1:21

What do you mean by "not working"?

What happens? (And "nothing" never happens...)
Do you get any error message?

Experience is the sum of all the mistakes you have done.

Re: i want to insert a new node regarding this code.but insert is not working..

samidhas4-Feb-08 4:06

Re: i want to insert a new node regarding this code.but insert is not working..

4-Feb-08 4:06

no i am not getting the logic how to do it? an confustion in a code....

Guffa4-Feb-08 8:58

Guffa

4-Feb-08 8:58

Well, if you don't explain what it is that you are trying to do with the code, it's even more confusing for someone who hasn't written it...

Experience is the sum of all the mistakes you have done.

Re: i want to insert a new node regarding this code.but insert is not working..

samidhas4-Feb-08 18:43

how to insert a new node in a tree view programatically?

4-Feb-08 18:43

i just want to insert a new node in the treeview and xml file both , where i can insert name and values from textbox.... will u help in for code?

samidhas3-Feb-08 23:32

Re: how to insert a new node in a tree view programatically?

3-Feb-08 23:32

i have textbox in which i can fill the values which should be updated into the treenode...?

Mircea Puiu3-Feb-08 23:45

Mircea Puiu

3-Feb-08 23:45

Simple example:

string someText = yourTextBox.Text;
TreeNode aNode = new TreeNode();
   aNode.Name = "some name here";
   aNode.Text = someText;
   yourTreeCtrl.Nodes.Add(aNode);

You could get more browsing the MSDN articles[^], couldn't you? Wink | ;)

SkyWalker

WebParts..

razanabanu3-Feb-08 23:24

razanabanu

3-Feb-08 23:24

When Im trying to work with Webparts im receiving this error...help me friends.

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Hi,Im Razana

Re: WebParts..

_tasleem4-Feb-08 1:27

_tasleem

4-Feb-08 1:27

Is that is exception from the code?
and have you tried to connect that server using sqlserver client/SQl Express? or during connection network may be disconnected.

Regards.
Tasleem Arif

How to capture Pc remote control keycodes?

dudiba3-Feb-08 23:18

dudiba

3-Feb-08 23:18

I have a pc remote control and I want to capture his keycodes and to change their functions. how can I do this?

Edit Data in DataGridView Control

D i x y3-Feb-08 22:50

D i x y

3-Feb-08 22:50

Hello Friends,
I am developing an C#.NET application and i am able to get data in DataGridView1 from SQL Server 2000 now i want that if someone wants to edit data in datagridview1 then it will save in the database.
So how can i achieve this....

Re: Edit Data in DataGridView Control

Mircea Puiu3-Feb-08 23:50

Mircea Puiu

3-Feb-08 23:50

An example would probably help Smile | :)

[^]

SkyWalker

Element name of serialized List<t></t>

Nathan Gloyn3-Feb-08 22:45

3-Feb-08 22:45

I'm starting to pull my hair out and hope somebody can help stop me from becoming bald!

I have a Class - LookupItem that uses XmlRoot attribute so that when serialized individually outputs under element named Item.

Now if I have a List<lookupitem> when I serialize it the lookup item class always serializes as LookupItem and not Item.

What I'm wanting to see is:

<Clean>
<Item>
....
</Item>
</Clean>

but all I get is:

<Clean>
<LookupItem>
....
</LookupItem>
</Clean>

The code I'm currently using to do the serialization is below, but I have tried doing serialization with extra types, XmlAttributeOverrides and still cannot get the output correct.

<br />
            XmlSerializerNamespaces ns = new XmlSerializerNamespaces();<br />
            ns.Add("", "");<br />
<br />
            XmlAttributeOverrides xao = new XmlAttributeOverrides();<br />
<br />
            XmlRootAttribute xr = new XmlRootAttribute("Clean");<br />
            XmlSerializer s = new XmlSerializer(typeof(LookupItemList));<br />
            <br />
            XmlWriterSettings settings = new XmlWriterSettings();<br />
            settings.OmitXmlDeclaration = true;<br />
<br />
            StringWriter output = new StringWriter();<br />
            XmlWriter writer = XmlWriter.Create(output, settings);<br />
<br />
            //TextWriter w = new StreamWriter();<br />
            s.Serialize(writer, Clean, ns);<br />
            writer.Close();<br />
<br />
            output.ToString();

Can anybody help me at all?

TJoe4-Feb-08 1:59

TJoe

4-Feb-08 1:59

I think you need to apply the XmlRootAttribute to the LookupItemList class. So Something like:

[XmlRoot("Clean")]
public class LookupItemList ...

Then you would need to do the same thing with the LookupItem class, but use XmlElementAttribute to define the name as "Item".

FYI...In your code example above you don't use xr or xao anywhere, are you sure this is the code you are using?

Take care,
Tom

-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com

Nathan Gloyn4-Feb-08 3:01

4-Feb-08 3:01

Sorry Tom,

Just realised code posted not quite correct I'm using:

<br />
            XmlSerializerNamespaces ns = new XmlSerializerNamespaces();<br />
            ns.Add("", "");<br />
<br />
            XmlSerializer s = new XmlSerializer(typeof(LookupItem));<br />
<br />
            XmlWriterSettings settings = new XmlWriterSettings();<br />
            settings.OmitXmlDeclaration = true;<br />
<br />
            StringWriter output = new StringWriter();<br />
            XmlWriter writer = XmlWriter.Create(output, settings);<br />
<br />
            //TextWriter w = new StreamWriter();<br />
            s.Serialize(writer, toSerialize, ns);<br />
            writer.Close();<br />
<br />
            return output.ToString();<br />

The root element won't help unfortunately since I'm trying to serialise a List<t>, even if I did create a specialist list based on type T all I get output is the correct root element, the issue is the items in the list being output with the correct element name as specified by myself using XmlRoot("Item") on the class that is stored in the list.

TJoe4-Feb-08 3:08

TJoe

4-Feb-08 3:08

For the LookupItem class you should use the XmlElementAttribute (I think). So something like this:

[XmlElement("Item")]
public class LookupItem ...

The XmlRootAttribute is only good for the root item in the XML doc (of which there is only one). Let me know if this doesn't work, though.

Take care,
Tom

-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com

Nathan Gloyn4-Feb-08 3:24

4-Feb-08 3:24

XmlElement can not be used on a class only property, index, field or param.

The XmlRoot attribute simply tells the serializer that for this particular class to use a specific name for the node, it doesn't directly relate to the root element of the doc.

Cheers

Nathan

TJoe4-Feb-08 3:47

TJoe

4-Feb-08 3:47

Sorry, my memory isn't what is used to be Wink | ;-)

Here is the code that should do what you want...

[XmlType(TypeName = "Item")]
public class LookupItem {
    // TODO
}
 
[XmlRoot("Clean")]
public class LookupItemList : List<LookupItem> {
    // TODO
}

I'm assuming you are using a generic List and that you are serializing the List as the root object.

Take care,
Tom

-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com

Nathan Gloyn4-Feb-08 4:08