User control updatepanel not updating not really interested in dating

If I were using Telerik's Rad Ajax Manager then I could do this with ease, but we don't have that =.

Does the ASP update panel support what I want to do?

Visual Studio Express provides a free development tool that makes ASP.

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I am using an Update Panel with an entire table in the content template.

Next, the code sets the property to true so that the page is completely processed before it is sent to the requesting client.

Two objects used to draw the rectangles are then created: a Bitmap and a Graphics object.

Within this update panel, I have dropdown A that calls a javascript function on its onchange event that sets the display CSS property of another control to none depending on the selected value of the dropdown list. However, I have dropdown B that invokes a Selected Index Changed which populates dropdown C with a set of values. The problem is that, when dropdown B's servside event is invoked, all the HTML within the content template appears to be reset, causing the control that I had previously hidden via CSS to show again.

What I would like to do is have dropdown B update only dropdown C and nothing else.

The variables created in the page are used as coordinates to draw the rectangles and a string that appears inside the largest rectangle.

When the three rectangles and the string that appears inside them are drawn, the Bitmap is saved to the Stream object that is associated with the property and its format is set to JPEG.

property to image/jpeg, so that the entire page will be rendered as a JPEG image.

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