Traverse all controls on the page

This problem is often encountered during the development of our system. There are many page controls, and we hope to control these controls through traversal. To give a simple example, you can determine whether all textbox buttons on the page are empty or clear all textbox buttons. In this way, we need to find a way to obtain these controls. The following is an example of the Code.

This is the code used to verify whether all radiobuttonlist on the page has been selected:

/** // <Summary>
/// Enter the verification information
/// </Summary>
Private void validatefield ()
{
For (INT I = 0; I <page. Controls. Count; I ++)
{
Foreach (system. Web. UI. Control in page. controls [I]. Controls)
{
If (control is radiobuttonlist)
{
If (string. isnullorempty (control as radiobuttonlist). selectedvalue ))
{
BMC. clutility. showmessage (this. Page, "some images are not filled in ");
Return;
}
}
}

}
}

If your page also contains widgets such as panel, datalist, and gridview, you can call them recursively [although the performance is not high ]:

Code
/** // <Summary>
/// Enter the verification information
/// </Summary>
Private void validatefield ()
{
For (INT I = 0; I <page. Controls. Count; I ++)
{
Validatefield (page. controls [I]. Controls );
}
}
/** // <Summary>
/// Verify the control set
/// </Summary>
/// <Param name = "cc"> </param>
Private void validatefield (controlcollection CC)
{
Foreach (system. Web. UI. Control in CC)
{
If (control is radiobuttonlist)
{
If (string. isnullorempty (control as radiobuttonlist). selectedvalue ))
{
BMC. clutility. showmessage (this. Page, "some images are not filled in ");
Return;
}
}
If (control is checkboxlist)
{
If (string. isnullorempty (control as checkboxlist). selectedvalue ))
{
BMC. clutility. showmessage (this. Page, "some images are not filled in ");
Return;
}
}
If (control. hascontrols ())
{
Validatefield (control. Controls );
}
}
}

 

Similarly, we can clear all textbox

Clear all edit box Codes
/** // <Summary>
/// Clear all edit boxes
/// </Summary>
Private void clearalltextbox ()
{
For (INT I = 0; I <page. Controls. Count; I ++)
{
Foreach (system. Web. UI. Control in page. controls [I]. Controls)
{
If (control is textbox)
{
(Control as textbox). Text = "";
}
}
}
}