Hi aysrun,

How did you populate the DataGridView rows? Did you use data binding? Here is a very easy way to populate data from xml file and save data to it using data binding.
public partial class Form1 : Form
{
private DataTable dtSource = new DataTable("Table1");

public Form1()
{
InitializeComponent();
dtSource.Columns.Add("Column1", typeof(int));
dtSource.Columns.Add("Column2", typeof(string));
dtSource.ReadXml(@"D:\data.xml");
dataGridView1.DataSource = dtSource;

textBox1.DataBindings.Add("Text", dtSource, "Column1");
textBox2.DataBindings.Add("Text", dtSource, "Column2");
}
private void btnSave_Click(object sender, EventArgs e)
{
dtSource.WriteXml(@"D:\data.xml");
}
}
In this example, I use a DataTable, WriteXml and ReadXml will auto serialize/deserialize the data into/from an xml file.

Then bind the dtSource to the TextBox, when you click different rows, it will populate the selected rows data in the two textboxes.

If I misunderstood you, please feel free to tell me.

Sincerely,
Kira Qian

for the deserializing part, it only serializes the first row of the datagridview.

im hoping to make it in a way that the only the selected row will be deserialized and displayed in the textboxes after user
clicks an EDIT button (bn_edit) not just the first row.

Hi aysrun,

How did you populate the DataGridView rows? Did you use data binding? Here is a very easy way to populate data from xml file and save data to it using data binding.
public partial class Form1 : Form
{
private DataTable dtSource = new DataTable("Table1");

public Form1()
{
InitializeComponent();
dtSource.Columns.Add("Column1", typeof(int));
dtSource.Columns.Add("Column2", typeof(string));
dtSource.ReadXml(@"D:\data.xml");
dataGridView1.DataSource = dtSource;

textBox1.DataBindings.Add("Text", dtSource, "Column1");
textBox2.DataBindings.Add("Text", dtSource, "Column2");
}
private void btnSave_Click(object sender, EventArgs e)
{
dtSource.WriteXml(@"D:\data.xml");
}
}
In this example, I use a DataTable, WriteXml and ReadXml will auto serialize/deserialize the data into/from an xml file.

Then bind the dtSource to the TextBox, when you click different rows, it will populate the selected rows data in the two textboxes.

If I misunderstood you, please feel free to tell me.

Sincerely,
Kira Qian

hi kira,

thanks fer you help. it is quite useful.
but there seemed to have some changes in the requirements.
after de-serializing the xml, i made it in a way that it is contained in a hashtable.
this hashtable is then displayed in the datagridview successfully.
now i want to make in a way that after i select one row in the datagridview, it is supposed to populate the values into the
textboxes.
how do i do that?

here are the codes which populates the hashtable into the datagridview:

Hashtable

void populateOIDataGrid(Hashtable hashtable)
{

DataSet ds = new DataSet();
DataTable dt = ds.Tables.Add("OrderItem");

dt.Columns.Add(

"OrderItemRowId", typeof(string));
dt.Columns.Add("OrderItemCode", typeof(string));

IDictionaryEnumerator enumerator = hashtable.GetEnumerator();

DataRow row = null;

while (enumerator.MoveNext())
{

ORDITEM oi = (ORDITEM)enumerator.Value;
row = dt.NewRow();
row["OrderItemRowId"] = oi.OrderItemRowId;
row["OrderItemCode"] = oi.OrderItemCode;
dt.Rows.Add(row);

}

dataGridView1.DataSource = ds.Tables[0];

}