MessageBox.Show 问题

Question

I have a lot of code like this and it usually works

private void button_Click(object sender, EventArgs e)
{
    try
    {
        DialogResult result;
        result = MessageBox.Show( "Questa operazione potrebbe richiedere alcuni minuti,\r\nsei sicuro di voler continuare?", "Attenzione", MessageBoxButtons.YesNo, MessageBoxIcon.Warning );
        if ( result == System.Windows.Forms.DialogResult.Yes )
        {
            DoSomething();
        }
        else
        {
            DoSomethingElse();
        }
    }
    Catch (Exception ex)
    {
        LogExceptio(ex);
    }
} 

but for some reason on a specific Windows Form the MessageBox is not showing. If I press Enter it proceed like I have made a click on YES; If I press the ALT key the MessageBox magically appear on the screen.

Any idea? What can I do to solve this issue?

Answer 1

Try to specify owner for the message box (as far as I remember there should be overloaded method containing that argument). Owner should be current opened window.

Answer 2

I solve this problem by setting DataGrid.visible = false.

private void button_Click(object sender, EventArgs e)
{
try
{
    DialogResult result;
    DataGrid.visible=false;
    result = MessageBox.Show( "Questa operazione potrebbe richiedere alcuni minuti,\r\nsei sicuro di voler continuare?", "Attenzione", MessageBoxButtons.YesNo, MessageBoxIcon.Warning );
    if ( result == System.Windows.Forms.DialogResult.Yes )
    {
        DoSomething();
    }
    else
    {
        DoSomethingElse();
    }
}
DataGrid.visible=true;
Catch (Exception ex)
{
    LogExceptio(ex);
}
} 

Answer 3

Because Of using some Threads in your application MessageBox May appear on background. So, You have to Pass MessageBox also in lambda expression Thread Like Below mentioned

new Thread(() => 
 {
    MessageBox.Show("Your Text");
 }).Start();

Hope It Will Help You...