通過重寫Form.ProcessCmdKey並跳過背景表單。
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if ((keyData & Keys.Tab) == Keys.Tab && (keyData & Keys.Control) == Keys.Control)
{
Form nextForm = GetNexMdiChildForm();
if (nextForm != null)
{
nextForm.Activate();
return false;
}
}
return base.ProcessCmdKey(ref msg, keyData);
}
private Form GetNexMdiChildForm()
{
//get current form index
Form currentForm = this.ActiveMdiChild;
int currentFormIndex = Array.IndexOf(this.MdiChildren, currentForm);
//get next form index
int nextFormIndex = currentFormIndex + 1;
if (this.MdiChildren.Length == nextFormIndex)
{
nextFormIndex = 0;
}
//check if next form is Form 3
if (this.MdiChildren[nextFormIndex] == background_mdichild_form)
{
nextFormIndex++;
if (this.MdiChildren.Length == nextFormIndex)
{
nextFormIndex = 0;
}
}
return MdiChildren[nextFormIndex];
}