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How to read and write XML file through C sharp


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How to read and write XML file through C#.Net

 Writing XML file

Here I’m creating XML file through C#.

private void btnAccept_Click(object sender, EventArgs e)

            {

try

            {

                string filename = "c:\\firstXML.xml";

//assigning file name of desired file we want to create.

                XmlDocument xmlDoc = new XmlDocument();

//creating new XML document

XmlTextWriter xmlWriter = new      XmlTextWriter(filename, System.Text.Encoding.UTF8);

//creating XmlTestWriter, and passing file name and encoding type as argument

                xmlWriter.Formatting = Formatting.Indented;

//setting XmlWriter formating to be indented

xmlWriter.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");

//writing version and encoding type of XML in file.

                xmlWriter.WriteStartElement("Employee");

//writing first element

                xmlWriter.Close();

//closing writer

 

                xmlDoc.Load(filename);

//loading XML file

 

                XmlNode root = xmlDoc.DocumentElement;

//creating child nodes.

                XmlElement childNode1 = xmlDoc.CreateElement("ComboBox1");

                XmlElement childNode2 = xmlDoc.CreateElement("ComboBox2");

                XmlElement childNode3 = xmlDoc.CreateElement("ComboBox3");

 

//adding child node to root.

                root.AppendChild(childNode1);

                childNode1.InnerText = comboBox1.Text;

//assigning innertext of childnode to text of combobox.

                root.AppendChild(childNode2);

                childNode2.InnerText = comboBox2.Text;

                root.AppendChild(childNode3);

                childNode3.InnerText = comboBox3.Text;

 

                xmlDoc.Save(filename);

//saving xml file

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.Message);

            }

            }

Reading from XML file through C#.Net

Here I’ll read from XML file through C#.Net

private void btnRead_Click(object sender, EventArgs e)

        {

            string doc = "c:\\firstXML.xml";

          

            XmlTextReader reader = null;

          

            // Load the file with an XmlTextReader

            reader = new XmlTextReader(doc);

           

            // Read the File

            if(File.Exists(doc))

            {

            while (reader.Read())

            {

    if (reader.NodeType == XmlNodeType.Element && reader.Name == "ComboBox1")

                {

//checking where read text is element and and name is “ComboBox1”

                    string strCmb1 = reader.ReadElementString();

//assigning ReadElementstring to strCmb1.

                    if (strCmb1 == "Red")

                        textBox1.BackColor = Color.Red;

                    else if (strCmb1 == "Blue")

                        textBox1.BackColor = Color.Blue;

                    else if (strCmb1 == "Green")

                        textBox1.BackColor = Color.Green;

                    else

                        textBox1.BackColor = Color.Yellow;

//changing backcolor of text box according to the XML file data.

                }

    if (reader.NodeType == XmlNodeType.Element && reader.Name == "ComboBox2")

                {

                    string strCmb2 = reader.ReadElementString();

                    if (strCmb2 == "Red")

                        textBox2.BackColor = Color.Red;

                    else if (strCmb2 == "Blue")

                        textBox2.BackColor = Color.Blue;

                    else if (strCmb2 == "Green")

                        textBox2.BackColor = Color.Green;

                    else

                        textBox2.BackColor = Color.Yellow;

                }

    if (reader.NodeType == XmlNodeType.Element && reader.Name == "ComboBox3")

                {

                    string strCmb3 = reader.ReadElementString();

                    if (strCmb3 == "Red")

                        textBox3.BackColor = Color.Red;

                    else if (strCmb3 == "Blue")

                        textBox3.BackColor = Color.Blue;

                    else if (strCmb3 == "Green")

                        textBox3.BackColor = Color.Green;

                    else

                        textBox3.BackColor = Color.Yellow;

                }

 

            }

            reader.Close();

            }

               

        }


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