Error while creating XML Document : XML document must have a top level element

How are you populating the actual objects?

This is what I've got so far. No errors yet

private void button5_Click(object sender, EventArgs e)
{

XmlDocument xmlDocument = new XmlDocument();
XmlSerializer serializer = new XmlSerializer(typeof(Processes));
XmlTextWriter xmlWriter = new XmlTextWriter(@"G:\Temp\temp1.xml",Encoding.ASCII);

Processes processes = new Processes();

NodeAttributes nodeAttributes1 = new NodeAttributes();
NodeAttributes nodeAttributes2 = new NodeAttributes();

ProcessAttribute processAttribute1 = new ProcessAttribute();
ProcessAttribute processAttribute2 = new ProcessAttribute();

processAttribute1.Add(nodeAttributes1);
processAttribute1.Add(nodeAttributes2);

processAttribute2.Add(nodeAttributes1);
processAttribute2.Add(nodeAttributes2);

processes.Add(processAttribute1);
processes.Add(processAttribute2);

serializer.Serialize(xmlWriter,processes);
}

Here is the NodeAattributes class. I'm using it to store properties of a flowchart node. trying to create an xml file of the flowchart.

public class NodeAttributes

{

// private members

string pvt_strProcessName = "Process Name";

string pvt_strName = "Node Name";

string pvt_Level = "Level";

string pvt_Group = "Group";

string pvt_Location = "Location";

string pvt_strUserAlloc = "User1";

string pvt_Form = "Form1";

string pvt_ActionReq = "Action";

string pvt_strOption = "Option1";

string pvt_strReminder = "0";

string pvt_strMaximum = "0";

bool pvt_strEscalate = true;

bool pvt_strLogStats = true;

Node pvtNode = null;

// public accessors

[CategoryAttribute("Description"),

DefaultValueAttribute("Process"), ReadOnly(true)]

public string ProcessName{

get { return pvt_strProcessName; }

set { pvt_strProcessName = value; }

}

[CategoryAttribute("Description"),DefaultValueAttribute("Node Name")]

public string Name{

get { return pvt_strName; }

set { pvt_strName = value; }}

[CategoryAttribute("Task Allocation"), TypeConverter(typeof(Levels))]

public string Level{

get { return pvt_Level; }

set { pvt_Level = value; }}

[CategoryAttribute("Task Allocation"), TypeConverter(typeof(Groups))]

public string Group{

get { return pvt_Group; }

set { pvt_Group = value; }}

[CategoryAttribute("Task Allocation"), TypeConverter(typeof(Locations))]

public string Location{

get { return pvt_Location; }

set { pvt_Location = value; }}

[CategoryAttribute("Allocation Type"),DefaultValueAttribute("First User")]

public string UserAlloc{

get { return pvt_strUserAlloc; }

set { pvt_strUserAlloc = value; }}

[CategoryAttribute("Visual Options"), TypeConverter(typeof(Forms))]

public string Form{

get { return pvt_Form; }

set { pvt_Form = value; }}

[CategoryAttribute("Visual Options"), TypeConverter(typeof(Actions ))]

public string ActionReq{

get { return pvt_ActionReq; }

set { pvt_ActionReq = value; }}

[CategoryAttribute("Visual Options"), TypeConverter(typeof(Options))]

public string Option{

get { return pvt_strOption; }

set { pvt_strOption = value; }}

[CategoryAttribute("Non-Action"),DefaultValueAttribute("Reminder")]

public string Reminder{

get { return pvt_strReminder; }

set { pvt_strReminder = value; }}

[CategoryAttribute("Non-Action"),DefaultValueAttribute("Maximum")]

public string Maximum{

get { return pvt_strMaximum; }

set { pvt_strMaximum = value; }}

public bool Escalate{

get { return pvt_strEscalate; }

set { pvt_strEscalate = value; }}

public bool LogStats{

get { return pvt_strLogStats; }

set { pvt_strLogStats = value; }}

public Node PNode{

get { return pvtNode; }

set { pvtNode = value; }}

 

public class Groups : StringConverter

{

private static ArrayList groups = new ArrayList();

private string[] gps = new string[10];

public void GetGroups()

{

SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["Connection"].ToString());

SqlCommand cmd = new SqlCommand("Select * from Groups", conn);

SqlDataReader rd = null;

conn.Open();

groups.Clear();

rd = cmd.ExecuteReader();

int i = 0;

int gID = 0;

string gDesc = "";

while (rd.Read())

{

gID = Convert.ToInt32(rd.GetValue(0));

gDesc = Convert.ToString(rd.GetValue(1));

Data d = new Data(gID, gDesc);

groups.Add(d);

gps[i] = gDesc;

i += 1;

}

rd.Close();

conn.Close();

}

public override bool GetStandardValuesSupported(

ITypeDescriptorContext context)

{

return true;

}

public override StandardValuesCollection

GetStandardValues(ITypeDescriptorContext context)

{

GetGroups();

return new StandardValuesCollection(gps);

}

public override bool GetStandardValuesExclusive(

ITypeDescriptorContext context)

{

return false;

}

 

}

public class Levels : StringConverter

{

private static ArrayList levels = new ArrayList();

private string[] ls = new string[10];

public void GetLevels()

{

SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["Connection"].ToString());

SqlCommand cmd = new SqlCommand("Select * from Levels", conn);

SqlDataReader rd = null;

conn.Open();

rd = cmd.ExecuteReader();

levels.Clear();

int i = 0;

int ID = 0;

string Desc = "";

while (rd.Read())

{

ID = Convert.ToInt32(rd.GetValue(0));

Desc = Convert.ToString(rd.GetValue(1));

Data d = new Data(Convert.ToInt32(rd.GetValue(0)), Convert.ToString(rd.GetValue(1)));

levels.Add(d);

ls[i] = Desc;

i += 1;

}

rd.Close();

conn.Close();

}

public override bool GetStandardValuesSupported(

ITypeDescriptorContext context)

{

return true;

}

public override StandardValuesCollection

GetStandardValues(ITypeDescriptorContext context)

{

GetLevels();

return new StandardValuesCollection(ls);

}

public override bool GetStandardValuesExclusive(

ITypeDescriptorContext context)

{

return false;

}

}

public class Locations : StringConverter

{

private static ArrayList locations = new ArrayList();

private string[] locs = new string[10];

public void GetLocations()

{

SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["Connection"].ToString());

SqlCommand cmd = new SqlCommand("SELECT LocationID,Description FROM Locations", conn);

SqlDataReader rd = null;

conn.Open();

rd = cmd.ExecuteReader();

locations.Clear();

int i = 0;

int ID = 0;

string Desc = "";

while (rd.Read())

{

ID = Convert.ToInt32(rd.GetValue(0));

Desc = Convert.ToString(rd.GetValue(1));

Data d = new Data(Convert.ToInt32(rd.GetValue(0)), Convert.ToString(rd.GetValue(1)));

locations.Add(d);

locs[i] = Desc;

i += 1;

}

rd.Close();

conn.Close();

}

public override bool GetStandardValuesSupported(

ITypeDescriptorContext context)

{

return true;

}

public override StandardValuesCollection

GetStandardValues(ITypeDescriptorContext context)

{

GetLocations();

return new StandardValuesCollection(locs);

}

public override bool GetStandardValuesExclusive(

ITypeDescriptorContext context)

{

return false;

}

}

public class Forms : StringConverter

{

private static ArrayList forms = new ArrayList();

private string[] frms = new string[10];

public void GetForms()

{

SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["Connection"].ToString());

SqlCommand cmd = new SqlCommand("Select * from GetForms", conn);

SqlDataReader rd = null;

conn.Open();

rd = cmd.ExecuteReader();

forms.Clear();

int i = 0;

int ID = 0;

string Desc = "";

while (rd.Read())

{

ID = Convert.ToInt32(rd.GetValue(0));

Desc = Convert.ToString(rd.GetValue(1));

Data d = new Data(Convert.ToInt32(rd.GetValue(0)), Convert.ToString(rd.GetValue(1)));

forms.Add(d);

frms[i] = Desc;

i += 1;

}

rd.Close();

conn.Close();

}

public override bool GetStandardValuesSupported(

ITypeDescriptorContext context)

{

return true;

}

public override StandardValuesCollection

GetStandardValues(ITypeDescriptorContext context)

{

GetForms();

return new StandardValuesCollection(frms);

}

public override bool GetStandardValuesExclusive(

ITypeDescriptorContext context)

{

return false;

}

}

public class Actions : StringConverter

{

private static ArrayList actions = new ArrayList();

private string[] acts = new string[10];

public void GetActions()

{

SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["Connection"].ToString());

SqlCommand cmd = new SqlCommand("Select * from GetActions where REQ=1", conn);

SqlDataReader rd = null;

conn.Open();

rd = cmd.ExecuteReader();

actions.Clear();

int i = 0;

int ID = 0;

string Desc = "";

while (rd.Read())

{

ID = Convert.ToInt32(rd.GetValue(0));

Desc = Convert.ToString(rd.GetValue(1));

Data d = new Data(Convert.ToInt32(rd.GetValue(0)), Convert.ToString(rd.GetValue(1)));

actions.Add(d);

acts[i] = Desc;

i += 1;

}

rd.Close();

conn.Close();

}

public override bool GetStandardValuesSupported(

ITypeDescriptorContext context)

{

return true;

}

public override StandardValuesCollection

GetStandardValues(ITypeDescriptorContext context)

{

GetActions();

return new StandardValuesCollection(acts);

}

public override bool GetStandardValuesExclusive(

ITypeDescriptorContext context)

{

return false;

}

}

public class Options : StringConverter

{

private static ArrayList options = new ArrayList();

private string[] opts = new string[10];

public void GetOptions()

{

SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["Connection"].ToString());

SqlCommand cmd = new SqlCommand("Select * from GetOptionGroups", conn);

SqlDataReader rd = null;

conn.Open();

rd = cmd.ExecuteReader();

options.Clear();

int i = 0;

int ID = 0;

string Desc = "";

while (rd.Read())

{

ID = Convert.ToInt32(rd.GetValue(0));

Desc = Convert.ToString(rd.GetValue(1));

Data d = new Data(Convert.ToInt32(rd.GetValue(0)), Convert.ToString(rd.GetValue(1)));

options.Add(d);

opts[i] = Desc;

i += 1;

}

rd.Close();

conn.Close();

}

public override bool GetStandardValuesSupported(

ITypeDescriptorContext context)

{

return true;

}

public override StandardValuesCollection

GetStandardValues(ITypeDescriptorContext context)

{

GetOptions();

return new StandardValuesCollection(opts);

}

public override bool GetStandardValuesExclusive(

ITypeDescriptorContext context)

{

return false;

}

}

public class Data

{

private int id = 0;

private string decription = "";

public Data(int i, string d)

{

id = i;

decription = d;

}

public int ID { get { return id; } set { id = value; } }

public string Description { get { return decription; } set { decription = value; } }

}