Member Avatar for major_lost

I am trying to determine the backcolor of a textbox and have an event happen. I've been using:

"If txtbox.backcolor = System.Drawing.Color.Red Then

End if"

But this dont work. Can somone help me?

ml

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  • Latest Post Latest Post by poojavb

Dani AI

Generated

noted you solved this yourself. For others who hit the same snag: there are two common causes and simple fixes.

First, ASP.NET server controls only expose a BackColor value if you set it server‑side (BackColor property). If the textbox color is coming from a CSS class, theme, or client script the server property will be Color.Empty and a server-side equality test will never match. See the WebControl.BackColor property for details: WebControl.BackColor.

Second, when comparing System.Drawing.Color values use a robust comparison. Comparing ARGB integers avoids subtle differences from named colors:

If TextBox1.BackColor.IsEmpty Then
    ' BackColor not set server-side (likely CSS). Handle accordingly.
ElseIf TextBox1.BackColor.ToArgb() = System.Drawing.Color.Red.ToArgb() Then
    ' matched red
End If

If the page sets background via CSS or client code, read the computed style on the client and post it back (hidden field or AJAX). Example JavaScript approach:

var bg = window.getComputedStyle(document.getElementById('<%= TextBox1.ClientID %>')).backgroundColor;
document.getElementById('<%= hiddenField.ClientID %>').value = bg;

To translate hex/HTML color strings to a Color on the server, use ColorTranslator.FromHtml. See the API for conversion details: ColorTranslator.FromHtml.

— encouraging OPs to paste solutions is helpful; sharing the exact approach that fixed the issue (server vs client, or a specific comparison method) saves others time.

Member Avatar for major_lost

Sorry about that. I found the solution on the web. Thanks anyway!

Member Avatar for poojavb

U can paste ur solution so that it would be helpful for someone else who need the same....

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