Question

After retriving the data from database, When I click the Update button there will raise a messagebox as “Changes has done.Do u like to proceed” with Yes/No buttons. But i want to raise the message box when I made any changes only. If i didn’t make any changes it should not raise.. Please help me how to know the changes in my textboxes and comboxes.
My code for raising is

DialogResult result = MessageBox.Show("Chanes has done, Do you wish to save changes.?", "Message",MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (result == DialogResult.Yes)
{
// HERE MY UPDATE CODE.
}

Answer 1

You’ll need to store the original values as strings, then compare these to the resulting values.

Alternatively a simpler implementation could just set a boolean isDirty flag to true on the text box changed event, and reset to false on a successful update.

Example code to help highlight what’s needed included below:

if(ValuesHaveChanged())
{
    DialogResult result = MessageBox.Show("Data has been changed, do you wish to save changes?", "Save Changes",MessageBoxButtons.YesNo, MessageBoxIcon.Question);
    if (result == DialogResult.Yes)
    {
        // HERE MY UPDATE CODE.
        ResetChangeDetection();
    }
}

.

private bool ValuesHaveChanged()
{
    return this.isDirty;
    /*
    return ! 
    (
        this.savedName.Equals(NameTextbox.Text)
        && this.savedAddress.Equals(AddressTextbox.Text)
    )
    */
}

.

private void ResetChangeDetection()
{
    this.isDirty = false;
    //this.savedName = NameTextbox.Text;
    //this.savedAddress = AddressTextbox.Text;
}