Accessing all controls in a groupbox

[travisowens]

Currently I'm using this code to clear all the TextBox.Text values in a GroupBox. (It may be not be pretty but it works).

 

private void btnCallerClear_Click(object sender, System.EventArgs e)
{
foreach(Control myControl in grpLocation.Controls)
{
	// TextBox test = myControl as TextBox;
	if ( myControl as TextBox == null )
	{
	}
	else
	{
		((TextBox)myControl).Text = "";
	}
}
}

 

I'm trying to make the code more programatic instead of hard typing the GroupBox's name and the best that I can come up with but DOES NOT work is...

 

 

private void btnCallerClear_Click(object sender, System.EventArgs e)
{
foreach(Control myControl in (GroupBox)sender.Parent.Controls)
{
	// TextBox test = myControl as TextBox;
	if ( myControl as TextBox == null )
	{
	}
	else
	{
		((TextBox)myControl).Text = "";
	}
}
}

 

How can I fix this, and does anybody have something a little bit more elegant?

[Arch4ngel]

try :

 

if( myControl is TextBox )

{

((TextBox)myControl).Clear(); // Same as .Text = ""

}

[travisowens]

Bizarrely I get a runtime (not buld) error on

 

myControl is TextBox

 

and

 

((TextBox)myControl).Clear();

 

but I'm not concerned why. I was actually trying to do myControl is TextBox initially but it was this runtime error that made me finder this other way listed in my original post.

[pendragon]

I have a class that I use for locking controls, clearing fields etc. I do something like this.

 

for (int index = 0; index < this.Controls.Count; iIndx++) 
{
switch (formName.Controls[iIndx].GetType().ToString())
{
	case "System.Windows.Forms.GroupBox":
		GroupBox groupBox;
		groupBox = (GroupBox)this.Controls[index];
		for (int index1 = 0; index1 < groupBox.Controls.Count; index1++)
		{
			switch (groupBox.Controls[index1].GetType().ToString())
			{
				case "System.Windows.Forms.TextBox":
					TextBox theControl;
					theControl = (TextBox)groupBox.Controls[index1];
					theControl.Clear();
					break;
			}
		}
		break;
}
}

 

But this can get complicated depending on what you what to look for (ie groupbox's in groupbox's)