adjusting the dimensions of an image with CSS or jQuery/C#

Is it possible to define the image size of this control using CSS?

<img style="border-width: 0px;" alt="Test image" src="userdata/1/uploadedimage/database%20entry.jpg">

I'm unsure if there is a way to specify a specific size for this image either through CSS, jQuery, or directly in my C# code using something like img.Style.

UPDATE:

To provide more context, here is an example of my CSS:

div .test
{
  width:90%; 
  z-index:1; 
  padding:27.5px; 
  border-top: thin solid #736F6E;
  border-bottom: thin solid #736F6E;
  color:#ffffff;
  margin:0 auto;
  white-space: pre;
  white-space: pre-wrap;
  white-space: pre-line;
  word-wrap: break-word;
}

In my code, images are dynamically added within the div as users input text into a textbox (the div itself is also assigned dynamically).

while (reader.Read())
                    {
                        System.Web.UI.HtmlControls.HtmlGenericControl div = new System.Web.UI.HtmlControls.HtmlGenericControl("div");
                        div.Attributes["class"] = "test";
                //div.Style["float"] = "left";

                        div.ID = "test";
                        Image img = new Image();
                        img.ImageUrl = String.Format("{0}", reader.GetString(1));
                        // this line needs to be represented in sql syntax
                        //img.ImageUrl = "~/userdata/2/uploadedimage/batman-for-facebook.jpg";
                        img.AlternateText = "Test image";

                        div.Controls.Add(img);
                        div.Controls.Add(ParseControl(String.Format("{0}", reader.GetString(0))));
                        div.Style["clear"] = "both";
                        test1.Controls.Add(div);

How can I apply the suggestions provided below in this particular scenario?

Answer №1

Indeed, <img> tags can indeed accept height and width declarations through CSS. If you opt for inline styling, here's how you can set both height and width to 100px:

<img style="border-width: 0px; width:100px; height:100px;" alt="Test image" src="userdata/1/uploadedimage/database%20entry.jpg" />

A more preferable approach would be using CSS targeting instead of inline styling:

<style type="text/css">
    img {border-width:0px; width:100px; height:100px;}
</style>

Your img tag would then look like this:

<img alt="Test image" src="userdata/1/uploadedimage/database%20entry.jpg" />

This styling will apply to all img tags on the page (which may not be desired), so you can add a class (or id) to the image for more specific CSS selection:

<style type="text/css">
    img.mySize {border-width:0px; width:100px; height:100px;}
</style>

<img class="mySize" alt="Test image" src="userdata/1/uploadedimage/database%20entry.jpg" />

Remember to use a dot for class declarations and a hashtag for ids.

If you want to maintain aspect ratio, simply define the width without specifying the height. Browsers will automatically adjust the height accordingly.

jQuery offers functionality to modify various CSS properties of elements:

$('img').css({
    height: 100,
    width: 100
});

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