IE10 sending image button click coordinates with decimals (floating point values) causing a ParseInt32 FormatException

Question

It seems like ASP.NET 4.0 is not prepared to handle ImageButton events triggered by Internet Explorer 10. The problem is that IE10 sends the image click coordinates as doubl

Answer 1

I ended up sub-classing the ImageButton, and correcting the data before it was passed in for processing.

using System;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;

namespace Xception.WebControls
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal),
    AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal),
    DefaultEvent("Click"),
    ToolboxData("<{0}:ImageButton runat=\"server\"> ")]
    public class ImageButton : System.Web.UI.WebControls.ImageButton
    {
        protected override bool LoadPostData(string postDataKey, NameValueCollection postCollection)
        {
            NameValueCollection newCollection = new NameValueCollection();

            foreach (string key in postCollection.AllKeys)
            {
                if (key.Equals(this.UniqueID + ".x", StringComparison.InvariantCultureIgnoreCase))
                    newCollection[this.UniqueID + ".x"] = Convert.ToInt32(Convert.ToSingle(postCollection[this.UniqueID + ".x"])).ToString();
                else if (key.Equals(this.UniqueID + ".y", StringComparison.InvariantCultureIgnoreCase))
                    newCollection[this.UniqueID + ".y"] = Convert.ToInt32(Convert.ToSingle(postCollection[this.UniqueID + ".y"])).ToString();
                else
                    newCollection[key] = postCollection[key];
            }

            return base.LoadPostData(postDataKey, newCollection);
        }
    }
}