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06/17/2009 at 10:13AM PDT, ID: 24499953
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8.8

C# ASP.NET: adding width and height properties and scrollbars to web user control

Asked by dbrckovi in WebApplications, Programming for ASP.NET, Microsoft Visual C#.Net

Tags: custom web control properties, ASP.NET, scroll bar

Hi!

I have to generate a bitmap at runtime and display it on my web page, so I decided to create a custom Web User Control. It's code is in code section.
The problem is, I can't specify control's dimensions on aspx page. When I put the control on a page and run it, I can see the upper-left part of the generated bitmap, but the rest is hidden by the boundries of the control. I can't see "style", "height", "width" or any similar property on my control.

As you can see, I made some attempts to add those properties, but it's not working because System.Web.UI.UserControl doesn't have those or any similar propeties to which I could map my properties.

What should I do to add those properties to my control?
Also, if my generated bitmap is larger than the size of the control, then it should have scrollbars.

Since these are 2 questions in 1, I'll award 250 points for size solution and 250 to scrollbars solution.

P.S. If you were wondering why I'm doing this, I'm creating my own custom chart diagram which can greatly vary in dimensions, so having control over it's dimensions or having ability to scroll it, is important.
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public partial class ImageGenerator : System.Web.UI.UserControl
{    
    #region Width
    private int width = 100;
    public int Width
    {
        get
        {
            return width;
        }
        set
        {
            width = value;
        }
    }
    #endregion
 
    #region Height
    private int height = 100;
    public int Height
    {
        get
        {
            return height;
        }
        set
        {
            height = value;
        }
    }
    #endregion
 
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!this.DesignMode)
        {
            Response.Clear();
            Response.ContentType = "image/jpeg";
 
            Bitmap b = new Bitmap(100, 100);
            Graphics g = Graphics.FromImage(b);
            g.DrawRectangle(Pens.Bisque, 10, 10, 90, 90);
 
            b.Save(Response.OutputStream, ImageFormat.Jpeg);
            Response.End();
        }
    }
}
[+][-]06/17/09 10:19 AM, ID: 24650458

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About this solution

Zones: WebApplications, Programming for ASP.NET, Microsoft Visual C#.Net
Tags: custom web control properties, ASP.NET, scroll bar
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Solution Provided By: daveamour
Participating Experts: 1
Solution Grade: A
 
 
[+][-]06/18/09 05:49 AM, ID: 24656843

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[+][-]06/18/09 06:37 AM, ID: 24657248

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[+][-]06/18/09 06:40 AM, ID: 24657269

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[+][-]06/18/09 06:45 AM, ID: 24657313

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[+][-]06/18/09 06:51 AM, ID: 24657352

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[+][-]06/18/09 07:04 AM, ID: 24657459

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