count controls on a page

[androidsun]

I have many image button controls on a page. I am trying to find an
easy way to loop through each of the image buttons and add client sided
script to its Attributes collection. I am thinking to use

foreach(ImageButton btnThis in this)
btnThis.Attributes("onclick","bla bla bla");

but it does not work. Your recommendation is appreciated.

 

[Scott M.]

How about this:

Dim myControl As Object

For Each myControl In Page.Controls
If myControl.GetType() Is ImageButton.GetType() Then
CType(myControl, ImageButton).Attributes.Add("onClick", "bla bla"))
End If
Next

 

[Steve C. Orr [MVP, MCSD]]

This code sample shows you how to loop through all the controls in a page
and operate on a specific kind of control, very similar to what you're
requesting.

http://SteveOrr.net/faq/ControlTreeRecursion.aspx

 

[androidsun]

Thanks for the help. I tried the suggested code, but all I could get
was the System.Web.UI.LiteralControl outside of the Form tag and the
System.Web.UI.HtmlControls.HtmlForm itself. Nothing inside the form
was iterated. The following is my test code.

int i=0;
string trIds="";
foreach (Control c in this.Controls)
{
if (c is System.Web.UI.WebControls.ImageButton)
{
i++;
}
strIds += "<p>" + c.ID + ":" + c.GetType().ToString() + "</p>";
}

lblTest.ext = i>0 ? i.ToString() : strIds;

 

[androidsun]

With further research, I found that the code would only iterate the
immediate child element but not child element contained within the
immediate child. I just add another iteration to the mix:
string strIds="";
foreach (Control c in Page.Controls)
{
if (c is System.Web.UI.HtmlControls.HtmlForm)
{
foreach (Control cc in c.Controls)
{
if (cc is System.Web.UI.WebControls.ImageButton)
{
i++;
strIds += "<p>" + cc.ID + ":" + cc.GetType().ToString() + "</p>";
}
}
}
}

lblError.Text = strIds;

 

[Steve C. Orr [MVP, MCSD]]

You should make the function recursive like I showed in my example, that way
it will work no matter how deeply your controls are nested.