Loop through controls in TabControl

问题

I am looking for a way to loop through controls on a particular tab of a tabcontrol. For example, I have a tabcontrol with the following tabs:

Cars, Pets, Admin

On each of these tabs are several controls to display/edit/save data, etc. On the "Save" button, I would like to loop through the controls for that particular tab to check whether all required fields have been filled in.

So, if I am on the Cars tab and click "Save," I want to loop ONLY through the controls on the Cars tab and NOT the Pets or Admin tabs.

How can achieve this result?

回答1:

As for looping through a TabControl's controls, you need to use the Controls property.

Here's an MSDN article on the TabControl.

Example:

        TabPage page = aTabControl.SelectedTab;

        var controls = page.Controls;

        foreach (var control in controls)
        {
            //do stuff
        }

回答2:

I feel it's important to note that, in general, you should take a more structured approach to your application. E.g., instead of having all the controls on three tab pages, include exactly one UserControl on each tabpage. A CarUserControl, PetUserControl, and AdminUserControl e.g. Then each user control knows how to create the proper respective data structure so you don't have to manually munge it all together at the same level of abstraction using inter-tab loops and whatnot.

Such a separation of concerns will make it much easier to reason about your program and is good practice for writing maintainable code for your future career.

回答3:

Example where I wanted to get the DataGridView in a particular tab for an application I wrote.

TabPage pg = tabControl1.SelectedTab;

// Get all the controls here
Control.ControlCollection col = pg.Controls;

// should have only one dgv
foreach (Control myControl in col)
{
    if (myControl.ToString() == "System.Windows.Forms.DataGridView")
    {
        DataGridView tempdgv = (DataGridView)myControl;   
        tempdgv.SelectAll();
    }
}

回答4:

The Controls property is the way to go...

foreach(Control c in currentTab.Controls)
{
    if(c is TextBox)
        // check for text change
    if(c is CheckBox)
        //check for check change
    etc...
}

回答5:

TabControl has a SelectedTab property, so you'd do something like this:

foreach(Control c in tabControl.SelectedTab.Controls)
{
    //do checks
}

回答6:

foreach (Control c in this.tabControl1.SelectedTab.Controls)
{
  // Do something
}

回答7:

I had the need to disable or enable controls of a tab as well. I had to go a bit more generic though. Hope it helps people and I didn't make a mistake

    private void toggleControls(Control control, bool state)
    {
        foreach (Control c in control.Controls)
        {
            c.Enabled = state;
            if (c is Control)
            {
                toggleControls(c, state);
            }
        }
    }

来源：https://stackoverflow.com/questions/1744429/loop-through-controls-in-tabcontrol

标签

winforms

loops

foreach

tabcontrol