Token StartAttribute in state Element Content would result in an invalid XML document

Question

Facing problem while adding the attribute value to the XMLWriter element.

Trying to add the Attribute to the XML element using the XMLWriter.StartAttributeString() using XMLWriter in C#

public bool WriteXML(XmlWriter writer, DataTable dtData, ref DataTable views, ref string error, string viewid, ref string fileName, ref string FileNameColumn, string ChildRootTagNameSecond, string skipcols)
    {
        bool flag = true;
        try
        {
            if (dtData != null && dtData.Rows.Count > 0)
            {
                foreach (DataRow dr in dtData.Rows)
                {
                    if (ChildRootTagNameSecond.Trim().Length > 0)
                        writer.WriteStartElement(ChildRootTagNameSecond);
                    foreach (DataColumn dc in dtData.Columns)
                    {

                        try
                        {
                            if (skipcols.Contains(dc.ColumnName.ToLower()))
                                continue;

                            if (dc.ColumnName.ToLower().StartsWith("attrib_"))
                            {
                                writer.WriteAttributeString(dc.ColumnName.Replace("Attrib_", ""), dr[dc.ColumnName].ToString());
                            }

                            writer.WriteElementString(dc.ColumnName, dr[dc.ColumnName].ToString());
                        }
                        catch (Exception e)
                        {
                            flag = false;
                            error = e.Message;
                        }
                    }
                    if (ChildRootTagNameSecond.Trim().Length > 0)
                        writer.WriteEndElement();
                    callView(writer, ref fileName, ref FileNameColumn, ref error, ref views, viewid, dr);
                }
            }
        }
        catch (Exception ee)
        {
            flag = false;
            error = ee.Message;
        }
        return flag;
    }

Answer 1

Problem solved by following the statement as given below.

Step 1: Start the element with XML tag name.

          writer.WriteStartElement("TagName");

Step 2: Start writing the attribute(s)[One or more]

          writer.WriteAttributeString("attibuteName", "Attribute Value);

Step 3: After the attribute are finished then write the XML tag value.

          writer.WriteString("value:);

Finall: Close the XML tag

          writer.WriteEndElement();

Below is the updated code

    public bool WriteXML(XmlWriter writer, DataTable dtData, ref DataTable views, ref string error, string viewid, ref string fileName, ref string FileNameColumn, string ChildRootTagNameSecond, string skipcols)
    {
        bool flag = true, firstElement = true; 
        string value="";
        try
        {
            if (dtData != null && dtData.Rows.Count > 0)
            {
                foreach (DataRow dr in dtData.Rows)
                {
                    if (ChildRootTagNameSecond.Trim().Length > 0)
                        writer.WriteStartElement(ChildRootTagNameSecond);
                    foreach (DataColumn dc in dtData.Columns)
                    {

                        try
                        {
                            if (skipcols.Contains(dc.ColumnName.ToLower()))
                                continue;
                            if (dc.ColumnName.ToLower().StartsWith("attrib_"))
                            {
                                writer.WriteAttributeString(dc.ColumnName.Replace("Attrib_", ""), dr[dc.ColumnName].ToString());
                            }
                            else
                            {
                                if (!firstElement)
                                {
                                    writer.WriteString(value);
                                    writer.WriteEndElement();
                                }
                                else
                                {
                                    firstElement = false;
                                }
                                writer.WriteStartElement(dc.ColumnName);
                                value = dr[dc.ColumnName].ToString();
                            }
                            //writer.WriteElementString(dc.ColumnName, dr[dc.ColumnName].ToString());
                        }
                        catch (Exception e)
                        {
                            flag = false;
                            error = e.Message;
                        }
                    }
                    if (!firstElement)
                    {
                        writer.WriteString(value);
                        writer.WriteEndElement();
                    }
                    if (ChildRootTagNameSecond.Trim().Length > 0)
                        writer.WriteEndElement();
                    callView(writer, ref fileName, ref FileNameColumn, ref error, ref views, viewid, dr);
                }
            }
        }
        catch (Exception ee)
        {
            flag = false;
            error = ee.Message;
        }
        return flag;
    }