看看下面代码就知道了
void ShowState(string str)
{
try
{
TextBox tb = (TextBox)tabControl1.TabPages[0].Controls[0];
if (tb.InvokeRequired)
{
delegateString ds = new delegateString(ShowState);
this.Invoke(ds, str);
}
else
{
tb.Text += Environment.NewLine;
tb.Text += str ;
}
}
catch (Exception exc)
{
MessageBox.Show(exc.Message);
}
}