C#

The DataGridViewComboBox must hold all possible values that it will display
in it's items collection. For example, when binding to the Customers table
and having the CompanyName field a combobox the combobox must contain all
possible values. If the grid attempts to set the cell's value where the
combobox cell doesn't have the value then we throw the dataError event.

To workaround this, handle the DataError event of the DataGridView. For
example:

void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs
e)
{
// ignore the data error occurring under the territoryComboBoxColumn
if (e.ColumnIndex != territoryComboBoxColumn.Index)
{
MessageBox.Show("Data error occurs:" + e.Exception.Message);
}
} 

if (e.ColumnIndex != territoryComboBoxColumn.Index)
{
    MessageBox.Show("Data error occurs:" + e.Exception.Message);
    //Add user's typed input into ComboBox here
}

private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
    if (radioButton1.Checked)
    {
        //TODO:
        MessageBox.Show("Radio1");
    }
}

private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
    if (radioButton2.Checked)
    {
        //TODO:
        MessageBox.Show("Radio2");
    }
}

private void radioButton3_CheckedChanged(object sender, EventArgs e)
{
    if (radioButton3.Checked)
    {
        //TODO:
        MessageBox.Show("Radio3");
    }
}

private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
    if (radioButton1.Checked)
    {
        numericUpDown1.ResetText(); //Clears input (you can assign default value)
        numericUpDown1.Maximum = 15;
        numericUpDown1.Minimum = 7;

        numericUpDown2.ResetText();
        numericUpDown2.Maximum = 15;
        numericUpDown2.Minimum = 7;
    }
}

private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
    if (radioButton2.Checked)
    {
        numericUpDown1.ResetText();
        numericUpDown1.Maximum = 10;
        numericUpDown1.Minimum = 5;

        numericUpDown2.ResetText();
        numericUpDown2.Maximum = 10;
        numericUpDown2.Minimum = 5;
    }
}

private void radioButton3_CheckedChanged(object sender, EventArgs e)
{
    if (radioButton3.Checked)
    {
        numericUpDown1.ResetText();
        numericUpDown1.Maximum = 20;
        numericUpDown1.Minimum = 3;

        numericUpDown1.ResetText();
        numericUpDown2.Maximum = 20;
        numericUpDown2.Minimum = 3;
    }
}

void RadioButtonChanged(object sender)
{
    RadioButton rb = sender as RadioButton;
    if (rb == rb1 && rb.Checked)
        // Add code for rb1.
    else if (rb == rb2 && rb.Checked)
        // Add code for rb2.
    else if (rb == rb3 && rb.Checked)
        // Add code for rb3.
}

moharrami wrote:

i want to get network systems hardware information whit a c# application!

David Fleming wrote:

That's true if you only need to back up one record.

List<int> data = new List<int>();
using(SqlDataReader reader = getTheReader()){
   if(reader.HasRows)
   {
       int ordinal = reader.GetOrdinal("YourColumnName");
       while(reader.Read())
         data.Add(reader.GetInt32());
   }
   reader.Close();
}

// contents of reader is in list data  Use that to do comparison

prasadbuddhika wrote:

what i need is to read previous data to compare data with previous data.