keep combobox text

[sjn21682]

hello everyone!!! i have a problem in keeping the value of my combobox, i have a form with a combobox, what i want is when i select from my combobox, it will retain or keep its text value even if i close the program, the combobox will only change the text value when i select another again. whats happening in my program is, when i close the form the value of the combobox in blank again. please help me...

[Rogachev]

Hello sjn21682,
Defiantly you have to serialize your form before close it. Do you do it?

Cheers

[sjn21682]

dear rogachev,

i guess i didnt, what do you mean by serialize?

[Rogachev]

Hello again
If we are talking about windows i can give you simple example:
1. Add references to your form:

using System.Xml;
using System.Xml.Serialization;
using System.IO;

2. Create class (You can add another properties for settings)

[XmlRootAttribute("MySettingsClass")]
    public class MySettingsClass
    {
        [XmlElementAttribute("ComboboxSelectedItem")]
        public string ComboboxSelectedItem { get; set; }
    }

3. Add next code:

public partial class Form1 : Form
    {

        private string fileName = "settings.xml";

        public Form1()
        {
            InitializeComponent();
            this.applyMySettings();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void applyMySettings()
        {

            try
            {
                XmlSerializer serializer = new XmlSerializer(typeof(MySettingsClass));
                FileStream stream = new FileStream(this.fileName, FileMode.Open);
                MySettingsClass settings = (MySettingsClass)serializer.Deserialize(stream);

                if (settings != null && !string.IsNullOrEmpty(settings.ComboboxSelectedItem))
                {
                    this.comboBox1.SelectedItem = settings.ComboboxSelectedItem;
                }

                stream.Close();

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            try
            {
                MySettingsClass settings = new MySettingsClass { ComboboxSelectedItem = (string)this.comboBox1.SelectedItem };
                XmlSerializer serializer = new XmlSerializer(typeof(MySettingsClass));
                StreamWriter writer = new StreamWriter(this.fileName);

                serializer.Serialize(writer, settings);
                writer.Close();

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }

This is simple example. You can read more about Serialization in MSDN.