DataGridView records disappear after closing form

Question

I have a datagridview that is not bound to a table in a database. The datagridview is being populated by the contents of a drop down list and a text box on a button click. I wan

Answer 1

You have many options. Here is a simple solution that uses XML serialization.

Note that it makes a few assumptions:

• The data all are strings
• The DataGridView already has all the columns

To save the other data types you should create a serializable structure!

private void saveButton_Click(object sender, EventArgs e)
{
    List<List<string>> data = new List<List<string>>();

    foreach(DataGridViewRow row  in dgInsertedInfo.Rows)
    {
       List<string> rowData = new List<string>();
       foreach (DataGridViewCell cell in row.Cells)
           rowData.Add(cell.FormattedValue.ToString());
       data.Add(rowData);
    }

    XmlSerializer xs = new XmlSerializer(data.GetType());
    using (TextWriter tw = new StreamWriter(yourFileName))
    {
        xs.Serialize(tw, data);
        tw.Close();
    }
}

private void loadButton_Click(object sender, EventArgs e)
{
    List<List<string>> data = new List<List<string>>();

    XmlSerializer xs = new XmlSerializer(data.GetType());
    using (TextReader tr = new StreamReader(yourFileName))
         data = (List<List<string>>) xs.Deserialize(tr);

    foreach (List<string> rowData in data)
        dgInsertedInfo.Rows.Add(rowData.ToArray());
}

Answer 2

You can write your OWN class and save it as a setting-property.

Class Settings:

namespace MyNamespace
{
    public class Settings
    {
        private ObservableCollection DataGridItemsProp;
        public ObservableCollection DataGridItems
        {
             get { return DataGridItemsProp; }
             set { DataGridItemsProp = value; }
        }
    }
}

Get and save your setting:

//get settings
var datagrid = Properties.Settings.Default.UserSettings;

//save settings
Properties.Settings.Default.UserSettings= datagrid;
Properties.Settings.Default.Save();